Systems & Components for Infrastructure · Motor and generator protection Feeder and bus bar relay ... for current measure and further components such as surge ... Systems & Components

S y s t e m s & C o m p o n e n t s f o r I n f r a s t r u c t u r e

Traction Power SystemsDC SwitchgearsPower ControlsDC High Speed Circuit BreakersContactorsProtection RelaysTransducersResistorsFans

2

Energy

Microelettrica Scientifica’s extensive product ranges

have become the standard of reference for a growing

number of customers worldwide in the challenging

Energy Market. Microelettrica Scientifica’s been

evolving through innovation to support new technology

in generation, renewable energy and smart grid.

Applications

Photovoltaic interface relay

Feeder and bus relay

Resistor for harmonic filters

Generator relay

Neutral grounding resistors

DC contactors for inverters and UPSs

Load banks

Photovoltaic string contactors

Ground fault neutralizer system

Industry

During almost 30 years of operation, a close

relationship with the Customers has been created.

Microelettrica products are present in most

of the industries such as Steel making, Cement,

Glass, Chemical, Oil&Gas and Utilities.

Applications

Motor and generator protection

Feeder and bus bar relay

Resistor for harmonic filters

Generator relay

Neutral grounding resistors

DC contactors for inverters and UPSs

Load banks

Photovoltaic string contactors

Ground fault neutralizer system

Products

ContactorsDisconnectors

DC High Speed Circuit Breakers

Power Resistor

Protection Relays

Fans

Transducers

3

Railways

Today, Microelettrica Scientifica is a leading supplier of

equipment for dc traction substations. We also offer to

our Customers a complete integration in DC Traction

System handling complex project by means our

engineering and project management experience.

Products

Traction Power Systems

DC Switchgears and Switching Cubicles


Feeder manager and DC Relays for Traction

Applications

DC Power Substations

Traction lines

Depot

DC Switchgears

DC Transducers

Contactors and Disconnectors

Power Resistor for Line Testing

Braking Resistors for Fixed Installation

Negative Protection Cubicles

Fans

Underground ventilation

Products

ContactorsDisconnectors


Braking ResistorsResistors for Traction Control

High Voltage Transducers

Fans

Made in Microelettrica Scientifica

Always aiming for the best results,

Microelettrica Scientifica develops and

manufactures the entire range of products

in Buccinasco close to Milan. We also

run operations in U.S.A., South Africa,

China, India, France, Brasil and Turkey

through which our Customers have access

to immediate local assistance and the

possibility of localization of Microelettrica

Scientifica products. Our Customers know

they can always count on quality, excellence

and accuracy of Microelettrica Scientifica

Products and Services.


Recti�er

Negative overvoltageprotection

Bar DIN Contactor

Hall eect transducer

V-I Transducer

UMLES

IR 2000

Feeder

IR 6000

Disconnector

Advanced remotecontrol DC

Breaker

SCADATransformer

Braking Resistor

Feeder Trolley

Diaclad

Advanced remote

MC-IRx MC-IRx MC-IRxMC-IRx MC-IRx

4 A t a i l o r e d s o l u t i o n f o r e v e r y s u b s t a t i o n c o m p o n e n t n e e d

Recti�er

Negative overvoltageprotection

Bar DIN Contactor

Hall eect transducer

V-I Transducer

UMLES

IR 2000

Feeder

IR 6000

Disconnector

Advanced remotecontrol DC

Breaker

SCADATransformer

Braking Resistor

Feeder Trolley

Diaclad

Advanced remote

MC-IRx MC-IRx MC-IRxMC-IRx MC-IRx

5A t a i l o r e d s o l u t i o n f o r e v e r y s u b s t a t i o n c o m p o n e n t n e e d


DC Hall E�ectTransducer

Breaker

High Speed Breaker

Bar DIN Contactor

Recti�er

SCADAAC Protection

Relay

Inverter DC Contactor

Interface Protection


Contactor

AC Low FrequencyContactor


Neutral Grounding Resistor Filter Resistor

Disconnector

Disconnector

Bar DIN Contactor

6 A t a i l o r e d s o l u t i o n f o r e v e r y i n d u s t r y c o m p o n e n t n e e d

DC Hall E�ectTransducer

Breaker

High Speed Breaker

Bar DIN Contactor

Recti�er

SCADAAC Protection

Relay

Inverter DC Contactor



Contactor

AC Low FrequencyContactor


Neutral Grounding Resistor Filter Resistor

Disconnector

Disconnector

Bar DIN Contactor

7A t a i l o r e d s o l u t i o n f o r e v e r y i n d u s t r y c o m p o n e n t n e e d


8 D C S w i t c h g e a r s

Description

The Feeder cubicle type DIACLAD designed and manufactured according to EN 50123 & IEC

61992 standards is suitable for indoor installation in DC traction substation systems such as

Tramways, Metros and Trolleybuses. The DIACLAD switchgear is capable to withstand internal

arc at 50kA – 300ms.

The cubicle is composed of three separate compartments:

• circuit breaker compartment that houses the withdrawable HSCB type IR6000 equipped

with the power part of Line Test Device (contactor, resistor and fuse)

• low voltage compartment complete of control and protection devices (e.g. UMLEs relay,

earthing relay, metering instruments, PLC and communication to SCADA)

• bus-bar compartment composed of two parts:

• main incoming busbar

• connection bars to connect the outgoing power cables. In this part is inserted the shunt

for current measure and further components such as surge arrester, earthing switch

and by-pass disconnector according to the plant’s philosophy

Type DIACLAD - Metalclad

Protections UMLEs feeder manager realy di/dt – ΔI/Δt – Imax Line Test Device

PLC integrated device Communication protocol ETHERNET TCP/IP MODBUS IEC61850 IEC 101/104

Breaker type IR6000 and IR2000 withdrawable

Feeder Cubicle

Nominal voltage Un [VDC] 750 1500 3000

Rated voltage UNe [VDC] 900 1800 3600

Rated insulation voltage UNm [VDC] 1800 2300 4800

Rated impulse withstand voltage UNi [kV] 15 18 40

Power frequency withstand voltage Ua [kV] 6,9 8,3 18,5

Rated service current INe [kA] up to 6 up to 6 up to 4

Rated current main busbar INe [kA] up to 9 up to 9 up to 6

Rated short circuit current INss/ÎNss [kA] 90/120 70/100 50/70

Electrical Characteristics

9



Protection degree

for the enclosure IP/3X IP/3X IP/3X

for the remaining separations (shutters included) IP/2X IP/2X IP/2X

Dimensions

Width [mm] 500 ÷ 600 500 ÷ 600 500 ÷ 600

Depth [mm] 1300 ÷ 1800 1300 ÷ 1800 1800 ÷ 2000

Height [mm] 2125 2125 2250

Weight [kg] ~ 600 ~ 600 ~ 650

Ambient conditions

operating temperature range - 5 ÷ 40°C - 5 ÷ 40°C - 5 ÷ 40°C

storage temperature range - 20 ÷ 50°C - 20 ÷ 50°C - 20 ÷ 50°C

relative humidity <90% <90% <90%

altitude 1200 m a.s.l. 1200 m a.s.l. 1200 m a.s.l.

Mechanical Characteristics

FRONT SIDE SECTION

TO LINE

(+)

HSC

BH

S

3

4

2

1

(For information only)

10

Description

The Disconnector cubicle type DIACLAD is mounted between the Rectifier unit

and the Feeder cubicles.

It is suitable for indoor installation in DC traction substation systems such as Tramways,

Metros and Trolleybuses and is designed and manufactured according to EN 50123 & IEC

61992 standards.

The main feature of the incoming cubicle is to allow access to the rectifier for the inspection

and maintenance while the DC section is in operation.


• withdrawable or fixed Disconnector Switch compartment

• low voltage compartment complete of control and measuring devices (e.g. reverse current

relay “32”, earthing relay “64”, metering instruments, PLC and communication to SCADA)

• bus-bar compartment where are allocated the main incoming busbar, the connection

for outgoing cables and the shunt for current measure.

Disconnector Cubicle






Rated service current INe [kA] up to 9 up to 6 up to 4

Rated current main busbar INe [kA] up to 12 up to 9 up to 6

Rated voltage auxiliary circuit [VAC/DC] 24 ÷ 220 24 ÷ 220 24 ÷ 220



Configurations Single or double poles

Control Motorized or Manual

Executions Withdrawable or Fixed

Protections Reverse current relay “32” Earthing relay “64”

PLC integrated device Communication protocol ETHERNET TCP/IP MODBUS IEC61850 IEC60870-5-101/104

D C S w i t c h g e a r s

11



Protection degree



Dimensions

Width [mm] 800 800 800

Depth [mm] 1300 ÷ 1800 1300 ÷ 1800 1800 ÷ 2000

Height [mm] 2125 2125 2250

Weight [kg] ~ 600 ~ 600 ~ 650

Ambient conditions






FRONT SIDE SECTION

TYPICAL LINE DIAGRAM

(+)

(-)

INC

OM

ING

NEG

ATIV

EC

ABL

ESH

SIN

CO

MIN

GPO

SITI

VE

CA

BLES

3

2

1

M


12

Description

The rectifier cubicle type DIACLAD designed and manufactured according to CEI EN 50328 &

IEC 61992 standards is suitable for indoor installation in DC traction substation systems such

as Tramways, Metros and Trolleybuses. The rectifier is available in a single unit having a simple

Graetz bridge (six pulses) assembled inside a withdrawable trolley or in two units having

two Graetz bridges (twelve pulses), either in parallel or in series connection, assembled inside

two separate withdrawable trolleys. The rectifier bridges are available with a single diode

per arm or up to four diodes in parallel per arm. The rectifier bridges are protected from

the overvoltage spikes by opportunely designed DC side snubber networks. The several cubicle

configurations can meet all Customer needs. The withdrawable execution allows the access to

the rectifier for the inspection and maintenance operation with the bus-bars connected.


• withdrawable (or fixed) rectifier compartment

• low voltage compartment where are mounted all the control and measuring devices

(e.g. reverse current relay “32”, earthing relay “64”, metering instruments, PLC

and communication to SCADA)

• bus-bar compartment where are allocated the AC connections to the transformer,

the DC positive and negative busbars, the connection for outgoing cables and the shunt

for current measure.

Rectifier Cubicle






Rated power Pd [MW] up to 2,5 up to 2,5 up to 2,5

Reaction 6 and 12 -pulses 6 and 12 -pulses 12 -pulses

Configuration (EN50328 – Tab. 4) 8 - 9 - 12 8 - 9 - 12 8 - 9 - 12

Duty class (EN50328 – Tab. 5) V - VI V - VI V - VI



Protections reverse current relay “32” frame protection relay “64”

Configurations single unit 6-pulses double unit 12-pulses series or parallel connected, with or without interphase reactor up to 4 diodes per arm fuse protection RC overvoltage protection

Execution withdrawable (or Fixed)

PLC integrated device Communication protocol ETHERNET TCP/IP MODBUS IEC61850 IEC60870-5-101/104


13



Protection degree



Dimensions per cubicle

Width [mm] 800 800 1200

Depth [mm] 1800 1800 2200

Height [mm] 2125 2125 2300

Weight per cubicle [kg] ~ 800 ~ 800 ~ 1400

Ambient conditions







FRONT SIDE SECTION

TYPICAL LINE DIAGRAM

(+)

(-)

INC

OM

ING

NEG

ATIV

EC

ABL

ESH

SIN

CO

MIN

GPO

SITI

VE

CA

BLES

3

2

1

M

14

Description

During the operation of DC traction systems the voltage between the rail and the grounding

network may arise at dangerous voltage level for the human body.

The persistence of these voltages must be prevented by means of voltage-limiting device

which is in accordance with the V-time curve of the EN 50122-1.

In fact the NOVPD measures and monitors the voltages (AC or DC) on the rails and in case

of excessively high voltage it temporally short-circuits the negative to grounding network.

The stray currents are minimized due to automatic re-opening of the short circuit device.

The main features of the NOVPD are:

• High safety for personnel and people

• Fast time response according with EN50122-1

• Type tested at full current

• Remotely controlled

• Diagnostics of SCR and contactors

Type DIACLAD – METALCLAD Enclosed

Protections Overvoltages according with EN 50122-1

Execution Fixed or drawout type

Communication protocol ETHERNET TCP/IP MODBUS protocol

Negative Over-Voltage Protection Device Cubicle






Making Capacity 25/50/100 kA 25/50/100 kA 25/50/100 kA



15


Nominal voltage Un [VDC] 750/1500/3000 750/1500/3000

Protection degree

for the enclosure IP/3X IP00

for the remaining separations (shutters included) IP/2X IP00

Dimensions

Width [mm] 800 520

Depth [mm] 600 975

Height [mm] 1750 1080

Weight per cubicle [kg] ~ 250 ~ 200

Ambient conditions

operating temperature range - 5 ÷ 40°C - 5 ÷ 40°C

storage temperature range - 20 ÷ 50°C - 20 ÷ 50°C

relative humidity <90% <90%

altitude 1200 m a.s.l. 1200 m a.s.l.



FRONT SIDE SECTION

FIG. 2

3 2

1

M

(+)

(-)

(+)

(-)

NEG

ATIV

EC

ABL

ESNEGATIVE

DIA

GN

OST

ICC

ON

TRO

LU

NIT

SCR

CO

NTR

OL

BOA

RD

FIG. 1

P o w e r C o n t r o l16

Network Flow Simulation

Type Engineering and Service

Applications Traction Power Systems

Description

We offer to our customers about 60 years of experience in the design, implementation and

commissioning of DC traction systems. This allowed us to acquire know-how and experience

to provide a full range of engineering service to support the design stage for a correct

identification of the technical characteristics of the major components of the traction power

such as rectifier groups, feeders, power cables and trolley wire cross section.

The railway may be modelled and analysed, simulating the movement of trains with different

timetable, different electromechanical data and different speed profile.

The model of the distribution network can be quite detailed, allowing the modelling of line

parameters, electrical substations, power connections and electrical nodes and branches.

The simulator can model systems with different voltage level and different kind of trains

as metro, LRV systems, trolleybus and mainline.

The simulation may provide the following output:

• Calculation of peak and average power consumption during trains operation

• Power flow of AC and DC current on all branches of the power net

• Distance between subs, cross section of catenary, cables

• Calculation of the energy consumption and power losses

17

Microelettrica Scientifica field service engineering may provide support to the Customer

on site with supervision of installation of our equipment cold test and hot test. The last step

of the commissioning some short circuit test must be performed in order to check the right

value of the short circuit currents near and far from the substation, the setting of the relay.

At the end of test a complete report shall be provided.


Based on the above output the operators can specify the technical characteristics

of the complete traction power systems according with the railway, type and speed

of the trains, stops along the tracks and headway. It gives a possibility to define the right value

of the investment to built new transportation systems or improve the service of the existing one.

We may also perform a short circuit calculation of the AC and DC substation in order

to provide the setting level of the relay:

• Overcurrent relay on transformer protection

• Overcurrent setting of magnetic release of the HSBC and DC relay

• Setting of the di/dt- ∆I

• Analysis fuse, diode and breaker protection curves


Applications

DC Substation

Industry

Remotely setting of current release.

Independent from thermal variation and calibration.

Multiple communication gateway wireless and wireline: GSM-R/GPRS – ADSL.

Easy MM interface - Web browser management.

Advanced Remote Control DC Feeder

GSM-R Net.

19


Remote control of multiple feeders in the substations of Traction Power Systems.

Historical track record of the setting points.

Overview of the feeders along the network railway lines.

INTRANET

GSMR

INTRANET

GPRS


SCADA SystemApplications

DC Substation

Industry

Microelettrica Scientifica solution for the SCADA of the Traction Power Substation suitable

for any railways or mass transit systems. We integrate all our equipment, such as protection

relays on AC supply network, feeder manager protection, relays and PLC or RTUs.

Main functionality are as follow:

1. leave available the control and supervision of the TPS

2. time clock and synchronism of the automation and diagnostics by means GPS

3. control and supervision by means HMI of all equipment of the system

4. complete management of all RTU of the SCADA

The HW and SW architecture is a scalable solution which permits expansion of the RTU

and the controlled equipment just adding other RTUs.

21


Central Control Unit – the CCU is the master commander of the whole system. The CCU manages all the data coming from

the RTUs, provides all the logics and safety procedures to the system and interface the Scada of the TPS to the upper automation level.

Remote Control Units – the RCU represents the whole RTUs to be installed on the field. The RTUs are the interface between

the Central Control Unit and the equipment such: feeder cubicles, traction rectifier groups, inverters, auxiliary supply panels,

MV switchgear, HV switchgear and the other power equipment of the TPS. The RTUs permit the data acquisition from the main

equipment in order to employ the logic, diagnostics and provide the command to the breaker and disconnecting switches.

LAN – LAN is the telecommunication network inside of the TPS which leave available the data transmission among the RTUs

and CCU.

The functions of the CCU are:

• Safety logics of the substation (Automatic Reclosing, Locking the equipment for maintenance, Opening routines, Interlocks

among switches and breakers)

• Interface Scada of the TPS with upper automation level

• Management of all SW and HW of the TPS

• By means of a manipulator to be installed on the control desk the CCU manages the following operation:

- Local position – all the operation shall be done by TPS SCADA and all the command from remote control will be disabled

- Remote position – all the operation shall be done remotely. The TPS SCADA will be used for supervision only

- Emergency position – all the operation shall be done on the push bottom on the switchgears

• Chronological Event Recorder data base manager: the CCU manages the event recording into a Data Base on the hard disk

of the PC Servers and leaves available all the file log with chronological time stamp

• Time stamp synchronisation: the Scada of the TPS is equipped with a GPS receiver which realise the time synchronisation

with homologate clock. The GPS signal is used by CCU to synchronize the LAN of TPS and all the RTUs

• Management of the catenary disconnecting switches

• SWITCHOFF Manager: the Scada can be programmed for the automatic exchange of the switchoff command during maintenance

operation. The safety protocol of the switchoff of the catenary shall be added to the Scada that’s real enhance safety

• Disturbances


Automatic Braking Resistor SystemDescription

Automatic Braking Resistor Systems (ABRS) for fixed installation are installed along the track

and can regulate the overvoltage which occurs on the traction line during the trains operation.

Dynamic braking is the method of train braking whereby the kinetic energy of a moving train

is used to generate electric current at the locomotive traction motors.

The electric current generated by the motors in the dynamic-braking mode can be useful for

the other trains running on the same track or it is a waste product and it must be dissipated as

heat in banks of resistors.

The ABRS of Microelettrica Scientifica measures the voltage of the traction line and acts

as throttle leave current flows into the load resistor banks and waste traction energy.

The load resistor banks can be cooled by forced ventilation or natural air ventilation.

The ABRS is based on IGBT technology or traditional contactors to switch ON and OFF load

resistor banks.

Type DIACLAD – Metal Enclosed

Control Power electronics or contactors

Execution Fixed type

Application Electromechanical braking

Communication protocol ETHERNET TCP/IP MODBUS protocol

Nominal voltage Un [VDC] 750

Rated voltage UNe [VDC] 900

Rated insulation voltage UNm [VDC] 1800

Rated impulse withstand voltage UNi [kV] 15

Power frequency withstand voltage Ua [kV] 6,9

Rated current [A] Rated power Pd [kW] up to 2000/1500


23


Automatic Braking Resistor System

Nominal voltage Un [VDC] 900

Protection degree for the enclosure IP22/IP44

Power of load bank [kW] 1500

Dimensions per load bank

Width [mm] 1150

Depth [mm] 1400

Height [mm] 2500

Weight load bank [kg] 550

Cooling Forced ventilation

Material active parts Stainless steel AISI 304


POSITIVE

NEGATIVE

MEA

SURE

MEN

TU

NIT

DIA

GN

OST

ICCO

NTR

OL

UN

IT

SWIT

CH

UN

IT

RESI

STO

RBA

NKS

F.O.

F.O.


24 D C H i g h S p e e d C i r c u i t B r e a k e r s

IR6000F lineThe IR6000 series are single pole, magnetic blow out, trip free, air circuit breakers.

The closing mechanism is an independent motor operated type.

The IR6000 Circuit Breaker is held closed by holding coil or by permanent magnet device

and is equipped with a direct acting over-current trip device which may be either

unidirectional and bidirectional.

The arc chute is made in ceramic material for a longer life and reduced maintenance.

The use of arching contacts ensure a long duration in electrical life.

The breakers can be used in single voltage or dual voltage applications, where multisystem

solution is required (ex 1800/3600V).

Applications

DC Substation

Industry

IR6000F Mechanical IR6080F

25

The breaker conforms to EN50123; IEEE C37-14; IEEE C37-16

A special version of the IR6000F is with mechanical latching. This ensures an high withstand

capability to the short circuit currents up to 150kA

Type Umax [V] I [A] W [mm] H [mm] L [mm]

IR6000F Mechanical up to 1200 (IEEE) 8000 340 1030 650

IR6080F up to 3600 8000 340 1030 650

IR6040F up to 3600 4000 300 1030 650

IR6080F IR6040F


482(19,00)

545

768(21,45)

(30,23)

89 89

(3,50) (3,50) (6,34)

161

1030

(140

,55)

630

(24,

08)

170

404

(6,6

9)(1

5,90

)

150

(5,9

0)

64

(2,5

2)

max 60(2,36)

307

232

184(7,24)

(12,09)

(9,13)

26 D C H i g h S p e e d C i r c u i t B r e a k e r s

IR3000F lineThe IR3000F series are single pole, magnetic blow out, trip free, air circuit breakers.

The closing mechanism is an independent motor operated type.

The IR3000 Circuit Breaker is held closed by holding coil or by permanent magnet device

and is equipped with a direct acting over-current trip device which may be either

unidirectional and bidirectional.

The arc chute is made in ceramic material for a longer life and reduced maintenance.

The use of arching contacts ensure a long duration in electrical life.

The breaker conforms to EN50123; IEEE C37-14; IEEE C37-16.

Different solutions of arc chutes help the cubicle designers for the optimization of the space.

Applications

DC Substation

Industry

IR3000F Vertical

27

Type Umax [V] I [A] W [mm] H [mm] L [mm]

IR3000F 900 900 3000 220 395 530

IR3000F 1800 1800 3000 220 478 530

IR3000F Vertical up to 1800 3000 220 720 530

IR3000F 900 IR3000F 1800


28

Applications

Line contactor

Power or auxiliary converter input

Filter pre-charging

Traction motors on-load disconnection

Electromagnetic brakes

Heating/Air conditioning systems

• The most experienced extra heavy duty line.

• Designed for on-board applications according to IEC 60077.

• Ratings up to 2000 VDC/AC and up to 1600 A/pole application.

• Direct or indirect arc blow-out systems available according specific application requirements.

• Multi-pole combination up to 4, NO or NC, poles.

• Very high level of customization available.

LTHS line

HD

w

LTHS 60

General Characteristics

28 C o n t a c t o r s

Applications

Line contactor

Power or auxiliary converter input

Filter pre-charging

Traction motors on-load disconnection

Electromagnetic brakes


LTHS line


HD

w

LTHS 60

Microelettrica Scientifica contactors for railway applications are designed to be used on

electrical equipment in presence of the most severe conditions, such as shocks and vibrations,

which occur on on-board traction vehicles.

The LTHS Line displays a traditional design which enables them to withstand the highest

current ratings in harsh working conditions.

To accomplish most of the possible applications, all the LTHS contactors can be manufactured

in single or multipolar form and, upon request, allow a very high degree of customization.

Versions with normally open or normally closed poles are manufactured, and mechanical

latching can be supplied. In order to work efficiently both with high and low currents, the

contactors are equipped with indirect blow out circuit. This arc-extinguishing technology

allows to work indifferently in AC as well as DC.

The DC control coil operates without economy resistor within a wide working range. A

“varistor” cuts off the peak voltage when the coil is de-energized.

More than 20000 LTHS contactors are delivered every year for the most demanding projects

and applications worldwide.

• The most experienced extra heavy duty line

• Designed for on-board applications according to IEC 60077

• Ratings up to 2000 VDC/AC and up to 1600 A/pole application

• Direct or indirect arc blow-out systems available according specific application requirements

• Multi-pole combination up to 4 NO or NC poles

• Very high level of customization available

Auxiliary contact blocks type SL11

• Up to 4 blocks normally mounted on LTHS contactors

• 1 NO + 1 NC or 2 NO block versions available

• Made in self-extinguishing Latamid polyamide that guarantees high electrical and mechanical

• Performances as well as very low temperature resistance

• Double interrupting, self-cleaning, solid silver contacts

• On request special execution with gold plate contacts

29

LTHS 125

LTHS 320/380

LTHS 400

LTHS 1500/1700

LTHS 650/800/1250

C o m p o n e n t s f o r o n - b o a r d a p p l i c a t i o n

29

LTHS 125

LTHS 320/380

LTHS 400

LTHS 1500/1700

LTHS 650/800/1250

Type Umax [VAC/DC] Ith [A] W [mm] H [mm] D1/D2 [mm]

(1/2 poles)

LTHS 60 1000 80 143 197 72/93

LTHS 125 1000 150 185 276 86/114

LTHS 320 2000 350 220.5 300.5 86/114

LTHS 380 2000 380 220.5 300.5 86/114

LTHS 400 2000 500 329 423 115.5/202

LTHS 650/800 2000 700/920 335 438(D1)/441(D2) 119/206.5

LTHS 1250 2000 1300 350 473(D1)/476(D2) 127.2/206.5

LTHS 1500 2000 1350 350 533.5(D1)/536.5(D2) 111/215

LTHS 1700 2000 1600 350 533.5(D1)/536.5(D2) 127/235

LTC 100 LTC 100 NC

LTCS 250 LTCS 250 2 poles

Applications

Auxiliary converter input

Filter pre-charging


Line contactor

H

D

w

• The modern and compact heavy duty line, up to 4000VDC/AC application, up to 1000A/pole

• On-board and stationary applications

• 1-2-3 and 4 pole configuration available, NO and NC poles, permanent magnets

or indirect arc blow outs

• Flexible control and auxiliary contacts options, customization available



LTC lineThe LTC Series contactors, thanks to their excellent balance between dimensions,

performances and robustness, are suitable for all those on-board applications which demand

a small, smart device. Their design encourages applications where high operating frequencies

and small available spaces are important requirements.

Like all Microelettrica Scientifica contactors, the LTC Series is based on a standard concept,

but a very high level of customization can be achieved by replacing a few key components.

Normally open and normally closed poles can be fitted, as well as mechanical latching.

The breaking circuit is equipped with permanent magnets or indirect arc blow out coil to

work efficiently both with high and low currents.

The DC control coil operates without economy resistor within a wide working range. A

“varistor” cuts off the peak voltage when the coil is de-energized.

More than 20000 LTC contactors are delivered every year for the most demanding projects

and applications worldwide.

• The most compact and modern heavy duty line



• Permanent magnet or indirect arc blowout systems available according specific application

requirements

• Multi-pole combination up to 4 NO or NC poles


Auxiliary contact blocks type SL11

• Up to 4 blocks normally mounted on LTHS contactors


• Made in self-extinguishing Latamid polyamide that guarantees high electrical and mechanical

• Performances as well as very low temperature resistance

• Double interrupting, self-cleaning, solid silver contacts

• On request special execution with gold plate contacts

LTCS 250 2 poles

LTC 250 NC

LTCH 250

LTCH 60

LTCH 1000

LTCS 250 3 poles

31


Type Umax [VAC/DC] Ith [A] W [mm] H [mm] D [mm]

LTC 100 1000 100 106 127.5 63

LTC 100 2 poles 1000 100/200 120 127 93

LTC 100 NC 1000 100 106 155 60

LTCS 250/300 2000 250 140 156.5 86

LTCS 250/300 2 poles 2000 250/500 140 156.5 109.2

LTCS 250/300 3 poles 2000 250 140 156.5 165.5

LTC 250/300 NC 2000 250 140 196 78

LTCH 250 2000 250 154 176 86

LTCH 60 4000 60 168 221 88

LTCH 60 2 poles 4000 60/120 168 221 125

LTCH 1000 2000 1000 385 300 93


Applications

Auxiliary converter input

Filter pre-charging

Capacitor discharging


Line contactor

Train supply line

Resistors based traction systems, for starting and braking of electric motors

LTHH 100LTHH 40

H

D

w

• The higher voltage single pole heavy duty line, up to 4000VDC/AC application, up to 1350A/pole

• On-board and stationary applications

• Multipole assemblies, NO and NC poles, indirect arc blow out

• Flexible control and auxiliary contacts options, high unit customization available


The Microelettrica Scientifica LTHH/LTE/LTP Lines for electric traction are supplied to railways

and underground systems throughout the world.

Where high voltage ratings are required, the LTHH Series contactors are the right solution.

The creepage and clearance distances are widely dimensioned for safe application in polluted

environments. Their narrow outline is especially conceived for applications where space is a

critical issue - as more and more often happens on railway vehicles.

To meet all possible applications, they are available both with electric (LTHH/LTE) and

pneumatic (LTP) control, and poles can be manufactured in normally open or normally closed

configurations.

The direct or indirect blow out circuit makes the LTHH contactors suitable to work both with

high and low currents.

The DC control coil operates without economy resistor within a wide working range. More

than 10000 LTHH contactors are delivered every year for the most demanding projects and

applications worldwide.

Auxiliary Contact Blocks Type SJ11

• Normally mounted on LTHH contactors


• Execution in Makrolon, self-extinguishing and transparent polycarbonate

• Double interrupting, self-cleaning, solid silver, snap action contacts

• On request special execution with gold plated contacts

LTHH/LTE/LTP line

• The highest voltage single pole heavy duty line



• Direct or indirect arc blow-out systems available according specific application requirements

• Multi-pole assemblies, NO or NC poles


33


LTHH 250/400

LTP 2-400/600

LTP 4-400/600

LTP 4-2000

Type Umax [VAC/DC] Ith [A] W [mm] H [mm] D1/D2 [mm]

(1/2 poles)

LTHH 40 2000 60 200(D1)/244(D2) 162.5(D1)/174.5(D2) 48/106

LTHH 100 4000 120 377(D1)/410(D2) 274(D1)/279(D2) 60/130

LTHH 250 4000 300 380.5(D1)/424(D2) 297(D1)/302(P2) 70/160

LTHH 400 4000 400 380.5(D1)/424(D2) 297(D1)/302(P2) 70/160

LTE 2-400 2000 900 428 367 80/-

LTE 2-600 2000 900 430 370(D1)/365(D2) 80/220

LTP 2-400 2000 900 402 367 80/-

LTP 2-600 2000 900 402 370 80/-

LTE 4-400 4000 900 429.4(D1)/379.3(D2) 394 85/175

LTE 4-600 4000 900 429.4 423 85/-

LTP 4-400 4000 900 402 394 85/-

LTP 4-600 4000 900 402 423 85/-

LTE 4-2000 4000 1350 501 473 119/-

LTP 4-2000 4000 1350 501 473 151.5/-


LTNS lineApplications

Transit and railway systems

Control of cranes

Mining equipment

Renewable energy

Rolling mills

Microelettrica Scientifica LTNS series have been developed to answer to the constantly

increasing market need of reduced dimensions and weight, taking most of the huge

know-how in designing and manufacturing of industrial bar mounted contactors.

These contactors have been designed starting from the N series electric arc management

concept, grafted on the light and compact structure of a rail unit, developed around

the control electromagnet.

The LTNS contactors, characterised by a nominal voltage of 750V, are available in a wide

range of current ratings, from 80A up to 1300A (up to 3 poles). They can be configured

in any combination of Normally Open or Normally Closed poles, with a common rating.

They have been designed and tested according to the international standard IEC 60947-4-1

and are suitable for almost any industrial low voltage application, such as: cranes, rolling mills,

electric energy production and transformation, photovoltaic panels, induction furnaces,

galvanic treatments.

H

D

w


• The extra heavy duty flexible line, up to 1000VDC/AC application, up to 1500A/pole

• Stationary application only, derived from LTHS line

• 1-2-3 pole configuration, NO and NC poles indirect or direct arc blow out options available

• Flexible control and auxiliary contacts options, high unit customization possible

35

Type Ith [A] Rated Nominal Rated Insulation D1/D3 [mm] W [mm] H [mm] Voltage Ue [V] Voltage Ui [V] Length (1-3 poles)

LTNS 60 80 600 750 72-130 193 138

LTNS 125 150 750 1000 86-169 260 185

LTNS 320 320 750 1000 105-277 350 260

LTNS 450 450 750 1000 105-277 360 260

LTNS 650 700 750 1000 105-277 405 280

LTNS 800 900 750 1000 105-277 405 280

LTNS 1000 1100 750 1000 125-340 459 350

LTNS 1250 1300 750 1000 125-340 459 350



N lineMicroelettrica Scientifica N series bar mounted contactors, in spite of their 60 years

old technical concept are still state of the art for many industrial, low voltage, heavy duty

applications. These contactors are designed and tested according to the standard IEC 60947-4-1.

They provide excellent operational performances, making them the best choice for high power

load connection, often covering the function of a fault clearing protection device.

The N series contactors are characterised by modular design so that their configuration can be

tailored to the specific requirements of each application. In fact, the pole ratings cover a wide

range, from 85A up to 6000A, and can be mounted side by side regardless of their size

and number on a customisable length shafts set, this way offering custom solutions to a wide

range of technical needs.

The maintenance is simplified by direct accessibility to all parts due to open construction

so that, in most cases, it is not necessary to remove the contactor from the cabinet.

Microelettrica Scientifica has been certified since 1993 according to the International

Quality Standard UNI EN ISO 9001:2008. Microelettrica has always paid great attention

to the environment and is certified according to the standard UNI EN ISO 14001:2004

and all materials used are RoHS compliant.

Applications

Transit and railway systems

Power generation

Control high power motors

Crane control

Heavy industries

Type Thermal Current Rated Nominal Rated Insulation D1/D4 [mm] H [mm] W [mm] Ith [A] Voltage Ue [V] Voltage Ui [V] Length (1-4 poles)

N 85 85 600 1000 250-400 165 155

N 125 125 600 1000 250-400 175 155

N 190 190 600 1000 250-400 205 170

N 270 270 600 1000 250-500 265 215

N 350 350 600 1000 250-500 275 215

N 550 550 600 1000 105-277 300 160

N 650 800 600 1000 300-600 320 160

N 800 650 600 1000 350-650 365 300

N 1000 1000 600 1000 350-650 365 300

N 1250 1250 600 1000 350-700 380 345

N 1600 1600 600 1000 350-800 420 420

N 2000 2000 600 1000 350-800 425 420

N 3000 3000 600 1000 400-1000 475 470

N 4000 4000 600 1000 500-1250 425 420

N 6000 6000 600 1000 600-1500 475 470

37

• The bar mounted modular extra heavy duty line, up to 1000VDC/AC application, up to 6000A/pole

• Stationary application only

• Up to 6 poles configuration, NO and NC poles direct arc blow out various aux contacts options

• Flexible control and adjustment configurations, total unit customization possible



N 85 1600 700 600 1700 1000 800 2750 350 50 110 15 26 13 15

N 125 2100 1000 900 2500 1500 1000 3500 450 60 130 15 23 13 15

N 190 2500 1600 1300 3000 2000 1400 4200 450 60 130 15 23 12 15

N 270 4300 2500 2000 4500 3000 2500 7000 1300 110 180 12 30 18 15

N 350 4800 3000 2500 5000 3500 3000 8500 1300 110 180 12 30 18 15

N 550 6000 4500 3900 7000 5000 4000 10000 1500 110 300 20 65 15 15

N 650 8000 5500 4500 9000 6000 5000 12000 – – 300 20 65 15 10

N 800 9500 6500 6000 10000 7000 6000 16000 – – 650 30 80 16 10

N 1000 12500 8000 7000 13000 9000 7500 21000 – – 650 30 80 16 10

N 1250 15000 10000 9000 16000 12000 10000 30000 – – 1000 50 90 10 10

N 1600 20000 15000 10000 25000 16000 12000 35000 – – 1000 50 95 11 10

N 2000 20000 15000 10000 30000 20000 15000 35000 – – 1000 50 95 11 10

N 3000 30000 15000 10000 35000 25000 18000 50000 – – 1500 80 90 10 10

N 4000 35000 20000 10000 40000 30000 20000 50000 – – 1500 80 90 10 10

N 6000 40000 20000 10000 40000 35000 20000 80000 – – 2500 100 90 10 10

440 V 750 V 1000 V 220 V 440 V 660 V [A] Pick-up Holding Pick-up Holding Closing Opening

Contactor

Breaking Capacity

A.C. cos 0 = 0,5I’ca [A] RMS value

D.C. L/R = 15 msI’cc [A] (2 poles)

A.C. [VA] D.C. [W]

Consumption of coils Operationtime

(m sec.)

Mech. endurance

in milion operations)

Making capacity

Ich

S t a t i o n a r y38

Neutral Grounding Short circuits between phase and ground can result in irreversible damage to networks

and equipments; it is therefore of the utmost importance to be able to control and reduce

their effects: Grounding Resistors limit the fault current that arises due to phase-neutral

short circuits. Grounding through resistor offers several advantages with respect to alternative

methods (such as insulated grounding, direct grounding or grounding through a reactance).

The main advantages are: easier detection of fault location, limitation of fault current,

no transient over voltages.

Relevant parameters in the design of a Neutral Grounding Resistor may vary greatly:

Microelettrica has developed a line of standard products (for the most common requirements)

along with tailored products, each developed and customised according to the required

project characteristics. Our products range from Low Voltage systems (<1kV) to High Voltage

(132kV insulation class), and from very low fault current values (tens of Amps)

to very high (>10kA).

The essential parameters needed to design a Grounding Resistor are:

• Nominal Voltage

• Fault Current

• Fault Duration (10s is customary)

39


Other relevant parameters are:

• Protection degree of enclosure: from IP00 - i.e. no enclosure - to IP55, standard solution IP23

• Enclosure finish: our standard is mild galvanised, but different stainless steel grades (such as

AISI304 or AISI316) are available. Painting in the desired RAL colour is also an option

• Continuous current rating; it may affect significantly the performance of the resistor,

especially when high IP degrees are required

• Environment and Elevation: we design resistors for the harshest industrial or natural settings

• Auxiliary components: during our many years of operation we have selected a number

of trusted suppliers for a wide choice of components, such as Current Transformers,

Switches, Disconnectors, etc.

Applications

Energy


Harmonic Filter

Quality of power is becoming ever more important for both suppliers and end users,

as the number of devices that may feed harmonics into power systems is increased,

resulting in higher line losses, interferences and resonances.

Harmonic Filters - made up by capacitors, inductors and resistors - help eliminating harmonics

which inevitably tends to occur. The LC circuit filters all spurious frequencies

and only let the fundamental frequency through, while the Harmonic Filter Resistors

(also referred to as Damping Resistors) dissipate harmonic currents into heat.

Typical applications for Harmonic Filters Resistors are HVDC networks

and electrical induction furnaces.

Our team of experienced engineers designs the best solution for the different

characteristics required and for the most diverse envinvironmental conditions.

Microelettrica can custom design Harmonic Filter Resistors from a few kW rating up to tens

of MW, as well as B.I.L. up to 600kV. Our Harmonic Filter Resistors employ non-magnetic low

temperature-coefficient elements, to minimise Ohmic value drift thus preventing excessive

power increase. They also have low parasitic inductance values, which is a key feature

for the effective design of damping elements.

41


The essential parameters needed to design a Harmonic Filter Resistor are:

• Nominal Voltage

• Current or Power

• Ohmic Value (with tolerance in %)


• B.I.L.

• Required Insulation Level: HV terminal to hearth, LV terminal to earth, between terminals

• Clearance and Creepage

• Enclosure finish: our standard is mild galvanised, but different stainless steel grades

(such as AISI304 or AISI316) are available. Painting in the desired RAL colour is also an option

• Environment: we design resistors for the harshest industrial or natural settings

• Maximum Inductance

• Bushing Layout: top or side mounted

• Mounting: three-phase stacked, side by side, others

Applications

Energy


Load Banks Load Banks allow to effectively check the efficiency of emergency sets (generators,

Uninteruptible Power Supplies) and can be employed as dummy loads to prevent wet

stacking on diesel engines. They represent a reliable and economic way to prolong the lifetime

of extremely expensive and important equipment.

Microelettrica custom designs Load Banks to satisfy all requirements, both in terms of power

to be dissipated (from tens of kW to tens of MW), insulation level (from hundreds of Volts

up to 36kV insulation class) and integration of the most diverse power steps, thanks

to the wide variety of grid element types designed and produced by Microelettrica itself.

Thanks to its many years of experience in both industrial and railway fields, Microelettrica

has also developed reliable ventilation curves, and can therefore offer forced-ventilated

Load Banks, which main advantage is that of allowing higher power-per-element and

thus smaller size. Microelettrica Load Banks are suitable for indoor and/or outdoor use;

they are placed in enclosures with up to IP23 protection degree. Ventilation can be horizontal

or vertical.

43


Load Banks

Microelettrica Load Banks can be controlled either locally or remotely (on request),

through switches (also manufactured by Microelettrica Scientifica).

The essential parameters needed to design a Load Bank are:

• Nominal Voltage

• Power

• Number and type of steps, if any

• Type of ventilation (natural or forced)


• Maximum Ohmic value drift: in case it is necessary to contain the thermal drift

of the resistance value, alloys with extremely low temperature coefficients can be used

• Protection degree of enclosure: up to IP23, standard IP20 (vertical ventilation)

or IP21 (horizontal ventilation, only for forced air cooled Load Banks)

• Enclosure finish: our standard is mild galvanised, but different

stainless steel grades (such as AISI304 or AISI316) are available.

Painting in the desired RAL colour is also an option

• Environment and Elevation: we design resistors for the harshest

industrial or natural settings

• Auxiliary components: contactors for step switching,

also manufactured by Microelettrica

Applications

Industry


Starting BrakingDischargeStarting and Braking Resistors are widely employed for controlling motors during

start and/or stop.

Starting Resistors may be used for wound rotor induction motor and DC wound motor

(this last type of motor is less and less common): adding a series resistor to each rotoric

phase reduces the current and improves the starting torque. Starting Resistors may also

be employed for squirrel cage induction motors, where series resistors added to the stator,

limit initial current to three times its nominal value. Starting Resistors for squirrel cage

motors are also known as Ballast Resistors.

The essential parameters needed to design a Starting Resistor are:

• Horsepower

• Rotor/Stator Voltage

• Rotor/Stator Current

• RPM

• Application: different applications require different solutions

Crane control is a quite common application for Braking Resistors: during descent the load,

especially if heavy, may cause the motor to generate power. Resistors are thus used to avoid

unwanted and uncontrolled acceleration.

45


Applications

Industry

Braking Resistors for large motors are customised to best comply with any requirement:

we have developed special Braking Resistors for important research institutes (among them

Max Planck Institute) and for energies in excess of 3400MJ.

De-excitation of large capacitors and inductors must be carried out with care to avoid

impulsive currents that could damage them permanently. Discharge Resistors limit the peak

current and protect the capacitive/inductive device.

The essential parameters needed to design a Discharge Resistor are:

• Nominal Voltage

• Discharge Current

• Discharge Duration

Discharge Resistors are often used by research institutes and they require a very high level

of customisation, sometimes also leading to the development of new technologies

for resistive elements. Microelettrica has cooperated with Universities all over the world

and with the most prestigious research centers (among them, CERN in Geneve).


Line Test High Speed DC circuit breakers are valuable components which must be protected against

wear and tear and excessive current flow. Before closing High Speed Circuit Breaker

on a power line, it is therefore advisable to test whether a short circuit is occurring by means

of line test resistors. The resistor is electrically connected through a contactor - if no fault

current is detected - then it is safe to activate the circuit breaker; otherwise, there is a fault

somewhere on the line. It is as well possible that activating the resistor for a few times

in a row (On - Off cycles with the desired number of consecutive on steps) may help in getting

rid of the physical cause of the short circuit.

The essential pieces of information needed to design a Line Test Resistor are:

• Nominal Voltage

• Test Current

• Duty cycle

Applications

DC Substation

47



Compact ResistorsCompact and modern design, low inductance, can be subjected to pulse loads.

Resistance material support: moulded ceramic base

Resistance wire: NiCr-alloy special heat sink casing

Degree of protection: IP64 up to IP66

Load and testing resistors:

• In test bays

• In narrow spaces

• In dusty and splash water environments

Applications

Braking/chopper resistors for variable speed drives, in particular in the fields of:

Hoisting and conveying equipment

Printing and paper

Packing, plastic, textile

Wire and wood processing

49


FrameResistorsFlat modular design, high energy absorption capacity, low-inductance versions,

can be subjected to pulse loads.

Resistance material support: grooved ceramic insulators fixed on both longitudinal

sides of a metal or temperature-resistant insulating material frame

Resistance wire: CuNi 44 or NiCr alloy

Taps (tapping eyes): on request

Degree of protection: IP00 - IP23 possible

Applications

Braking/chopper resistors for frequency converters, load and testing resistors

R e l a y s50

A line

PB../.. Dual level current relay: 50/51

UB0-A Earth fault current relay desensitised to the third harmonic: 51N

BI20/.. Two phase + earth fault overcurrent relay: 49, 51, 51N

BI2C Dual level D.C. current relay: 49, 76

BF3 Three phase breaker failure relay: 50BF

UB./. Under/Over-voltage relay: 27, 59, 45, 80

UB./. Dual level voltage relay: 27, 59, 45, 80

UB0 Zero sequence voltage relay desensitised to the third harmonic: 64

UB./60 Voltage balance relay: 60

UB0/100 Relay for 100% generator stator earth fault protection: 64s

UB1/2/C Battery positive/negative leakage to earth fault protection

UB3/59-S Overvoltage relay for supervision of CTs ‘ circuits

RBW Directional overcurrent relay: 32, 67, 67N

RRS Automatic load sharing control relay for generators: 95

UB0/CR Rotor earth fault relay: 64R

RB4 Lock-out relay: 86

RHS Rotating diode failure detection relay: 58

RCA Trip circuit supervision relay: 74

UB0/ATR High impedence differential relay: 87N(87G)

Relays Type

Main features:

• Measuring inputs supplied through internal adaptor transformers

• Multivoltage a.c. and d.c. autoranging power supply unit

• Draw-out modular execution on standard european size P.C. boards

• Fibreglass reinforced epoxy resin P.C. boards with tinplated copper tracks, solder mask

special silicon humidity protection and screen printed component designators

• P.C. board connectors with golden plated pins rated 10A continuous and 200A 1sec

Execution

“E” for flush mounting with back connection terminals, draw-out relay boards with automatic

short circuit of the current inputs. Transparent front cover. Protection degree IP54;

accessories for surface mounting (E/I) are also available.

“E/R” standard 19”3U (8 modules) or 6U (16 modules) rack with back connection terminals,

draw-out relay boards with short circuit of the current.


The series of electronic analogic protective relays here below presented has been designed

according to the most advanced technologies in order to obtain the highest reliability,

accuracy and immunity to interference and is made with first choice components safely

dimensioned and protected.

The application of severe testing and quality control procedures guarantees the reliability

of the product.

51


Output Relays

Two versions are provided:

• Standard version: the output relays are de-energized on normal operating conditions and are energized on relay’s tripping

• Positive protected version (on request): the output relays are energized on normal operating conditions, (i.e. with auxiliary

supply on and input values at normal levels) and are de-energized on relay‘s tripping, failure of power supply, internal relay fault

Signalization

• Green led: auxiliary power supply presence

• Red led: trip indication

• Yellow led: trip memorization

Control

• Relay test with or without tripping of output contacts

• Automatic and/or local/remote reset of the output relays

• Local manual reset only for signal led

Blocking and Intertripping Circuits

On request are available:

• Blocking input (BI)

• Blocking output (BO)

• Time start output (TO)

RELAY PB3

164

135

83

1 MODULEPANEL CUT-OUT

64X137 (LXH)

2 195

213

225

Overall Dimensions: mm

R e l a y s52

M line

Measurements • Real Time Measurements • Maximum Demand and Inrush Recording • Trip Recording (last 5 trips with date & time)

Control • 5 Output Relays (programmable) • 3 Digital Inputs • Time tagged event recording • Blocking Outputs and Blocking Input for pilot wire selectivity coordination

Communications • 1 RS485 Serial communication port on rear side • Modbus RTU Communication Protocols

Technical Characteristics • Complete self diagnosis program• 8 Digit alphanumerical Display • 8 Led for signalization

Mounting• 2 Module boxes • IP44 protection case (on request IP54)• Totally draw-out execution

Software • MSCom2 Program interface for device management

IM30-AB Three-phase Overcurrent and Earth Fault - Dual Setting: 50/51, 50N/51N, 51BF

IM30-AP Three-phase Overcurrent and Earth Fault: 50/51, 50N/51N, 51BF

IM30-C Capacitor Overload, Earth Fault And Unbalance Protection: 50/51, 50N/51N, 46N, 37, 51BF

IM30-D Three-phase Overcurrent + Directional Earth Fault: 50/51, 50N/51N/67N, 59Uo, I2t, 51BF

M-ARM513 Multishot Programmable Single/Three Phase Autoreclose: 79

SCM21 Three Inputs Synchrocheck: 25, 27/59, 81.

MM30 Motor Protection: 12/14, 37, 46, 47, 48, 49, 50/51, 51LR, 64, 66

MM30-D Motor Protection With Directional Earth Fault: 12/14, 37, 46, 47, 48, 49, 50/51, 51LR, 64N, 66

MM30-W Motor Protection Relay With Voltage & Power Control: 12/14, 27/59, 37, 46, 47, 48, 49, 50/51, 51LR, 55, 64, 66, 81

IM30-T Three-phase Thermal + Overcurrent + Earth Fault: 46, 49, 50/51, 50N/51N, 51BF, I2t

MD32-T Percentage Biased Transformer Differential: 87, 87N

MD33-T Percentage Biased Differential Relay For 3-winding Transformers: 87, 50/51

MTR33 Transformer On-load Tap-Changer Control: 27, 59, 37, 50/51, 90

IM30-G Multifunction Generator Protection: 32, 40, 46, 50/51, 51BF, 64S

IM30-B00 Earth Fault Relay - Dual Setting: 50N/51N, 51BF

IM30-DR Three-phase Overcurrent with Directional Earth Fault + Autoreclosing: 50/51, 50N/51N/67N, 46, 79, 51BF

MG30 Generator Protection & Management: 21, 24, 27/59, 32, 37, 40, 46, 49, 50/27, 50V/51V, 51BF, 60FL, 64S, 81

MD32-G Percentage Biased Generator Differential Relay: 50/51, 87N or 64S, F87, 51BF

SPM21 Generator Synchronizing Relay: 25, 27/59/81, 90

M-LIB3 Modular Low-Impedance Bus-bar Protection: 87B

M-HIB3 High Impedance Biased Differential Relay: 87, 51BF

M-HIV3 Three Phase High Impedance Busbar Differential Relay With Supervision of CT Secondary Circuits: 87B, 59S

MFP Pilot Wire Differential Protection Relay for Cables & Lines: 87/85, 50/51, 51BF

UM30-A Three-phase Voltage, Frequency & Zero Sequence Voltage with Vector Shift Detection: 24, 27d/59d, 47, 59, 59Uo, 81

UFD34 Three-phase Digital 4-stage Frequency Relay With Df/dt & Dv/dt Control: 27/59, 81, df/dt, dv/dt

MU30 Multifunction Three-phase Measuring Unit

MW33 Power Management Relay: 27/59, 81, 32

MX7-5 Programmable Interface & Control Module: 7 Digital Inputs & 5 Output Relays

MX14-5 Programmable Interface & Control Module: 14 Digital Inputs & 5 Output Relays

Relays Type

General CharacteristicsM line is a complete series of microprocessor based relays suitable for protection of high and medium voltage systems; it offers a unique combination of performances, functionality, innovation and reliability. The line is completed by a number of communication and control modules giving a good level of modularity.

53


}

PRESA/TAP 31 lon=5APRESA/TAP 31 lon=1A

AUXILIARYSUPPLY

25

26

27

283929

4130324331

42

33

25

26

27

283929

4130324331

42

33

25

26

27

283929

4130324331

42

33

2110

1122

79

81820

1946

51517

1614321

382324

In=5A

In=1A

1213

1/5A

DISPLAY

MICROP.

IM 3 0 - A B

FUNCTION

KEYBOARD

INT.FAULT R5

R1

R2

R3

R4

R5

B4B3B2

RS485

(21)

(10)

N.O.

N.C.

N.O.

N.C.

F50 R1

F51 R2

F50N R3

F51N R4

1/5A

1/5A

1/5A

Wiring DiagramRELAY PB3

135

134

2 195

213

225

PANEL CUT-OUT 115X137 (LXH)

164


R e l a y s54

MC line

Measurements

• Real Time Measurements

• Trip Recording

(last 20 trips with date & time)

• Event recording (last 10 trips)

Control

• 4 Output Relays (programmable)

• 3 Digital Inputs

• Time tagged multiple event recording

• Oscillographic wave form capture

• Blocking Outputs and Blocking Input

for pilot wire selectivity coordination

• Associate C.B. control

Technical Characteristics

• Complete self diagnosis program

• Display LCD 16 (2x8) characters

• 4 Leds for signalization

Communications

• 1 RS485 Serial communication

port on rear side

• 1 RS232 Serial communication

port on front panel

• Modbus RTU/IEC870-5-103/IEC61850

Communication Protocols

Expansion Modules (optional)

• “UX10-4” 10 Digital Input and

4 Output Relays

• “14DI” 14 Digital Inputs

• “14DO” 14 Output Relays

Execution

• 1 Module box (2 modules with expansion)

• Totally draw-out execution

• IP44 protection case (on request IP54)

Software

• MSCom2 Program interface for device

management

MC1V Multifunction Single Phase Overvoltage/Undervoltage Relay: 59, 27, 81>, 81<

MC3V Multifunction Three Phase Overvoltage/Undervoltage Relay: 59, 27, 81>, 81<, 59Vo, 59V2, 27V1

MC20 Overcurrent & Earth Fault Relay: 50/51, 50N/51N, 51BF

MC30 Three Phase Overcurrent & Earth Fault Relay: 49, 50/51, 50N/51N, 51BF

MC40 Three Phase Overcurrent & Earth Fault (connection with 4 CT ‘s): 49, 50/51, 50N/51N, 51BF

MC20-R Overcurrent & Earth Fault Relay: 50/51, 50N/51N, 51BF, 79

MC30-R Three Phase Overcurrent & Earth Fault with reclosing function Relay: 50/51, 50N/51N, 51BF, 79

MC30-BC Three Phase Overcurrent & Earth Fault + Broken Conductor Relay: 50/51, 50N/51N, 51BF, BC (I2/I2)

MCDC-I D.C. Current Relay: 76/32, 49, 51BF

MCDC-V D.C. Voltage Relay: 45, 80

MCM Motor Protection Relay: 37, 46, 47, 48, 49, 50/51, 51LR, 64S, 66, 68

Relays Type


The MC line has been designed to offer to the market a very competitive protective relay

responding to the latest requirements in terms of control and communication capabilities

with an extremely high level of modularity. Each relay includes a limited number of protective

functions but, thanks to their very compact sizes, different units can be combined in a modular

enclosure to satisfy the most demanding needs.

55

In= 1A 5AIon= 1A 5A

AUXILIARYSUPPLY

MS-SCE1828-R1

DISPLAY

MICROP.

MC20

1/5A

6

7

4

5

8

9

6

7

4

5

8

9

16

18

1714

15

13

12

2021

1922

10

11

1/5A

1/5A

FUNCTION

F50F51F50NF51N

R1

R1

R2

R3

R4

D3D2

D1

R2

R3

R4INT.FAULT

RS485CA (S+)B (S-)

DIGITALINPUTS

OUTPUTRELAYS

KEYBOARD

BPMC

321

Wiring Diagram


In= 1A 5AIon= 1A 5A

AUXILIARYSUPPLY

MS-SCE1828-R1

DISPLAY

MICROP.

MC20

1/5A

6

7

4

5

8

9

6

7

4

5

8

9

16

18

1714

15

13

12

2021

1922

10

11

1/5A

1/5A

FUNCTION

F50F51F50NF51N

R1

R1

R2

R3

R4

D3D2

D1

R2

R3

R4INT.FAULT

RS485CA (S+)B (S-)

DIGITALINPUTS

OUTPUTRELAYS

KEYBOARD

BPMC

321

164

135

83 2 195

213

225

1 MODULEPANEL CUT-OUT

64X137 (LXH)


R e l a y s56

U-MLEs D.C. Feeder Manager Relay: 49, 32/76, 80, 45, 64, 79, DI, di/dt, Rapp, Iapp, CMI, LT, BF

U-MLC D.C. Feeder Manager Relay (Italian Railway Certification): 27/59, 32, 45, 49, 64, 76, 79, 80

U-MLC- M D.C. Energy Metering: I, V, W, E

DTMR Differential Transformer Relay: 50/51, 87T, 87N/51N

FMR Feeder Manager Relay: 49, 50/51/67, 50N/51N/67N, 27/59, 81, 46, 59Uo, 51BF, F 27U1, 59U2/47, 79

MMR Motor Manager Relay: 12/14, 37, 27/59, 46, 49, 50/51, 51LR, 51BF, 55, 64, 66, 81

GMR Generator Protection & Management Relay: 21, 24, 27/59, 32, 37, 40, 46, 49, 50/27, 50V/51V, 51BF, 60FL, 64S, 81

Relays Type

Ultra line General Characteristics

ULTRA is the top line of Microelettrica Scientifica protective relays; it has been designed

to meet the most demanding specifications for any application in Transmission, Distribution

and Industrial plants. The ULTRA relays are used in all the applications where, besides

the protection, a complete measuring system is needed. Each relay is a multifunctional unit

combining protection, measurements and control. Thanks to the CAN BUS communication

port and to a complete range of additional modules, the relays of this line can perform

a complex input/output logic for interlocking substation system avoiding the use

of an additional PLC. The multiprotocol makes the relay very versatile and suitable

to be implemented in the most common DCS and SCADA systems.

Recording

• Event Recording (last 100 events)

• Trip Recording (last 20 trips) complete with

cause of tripping and values of the input

quantities at the moment of trip

• Oscillographic recording of input quantities

(8 channels, 32 sample/cycle, 3 sec each)

Control

• 6 Output Relays user programmable

• 4 Digital Inputs user programmable

• Blocking input and Blocking output for pilot

wire selectivity coordination

• Time tagging resolution 1ms

• Trip circuit supervision

• Associated Circuit Breaker control

(OPEN/CLOSE)


• Graphical Display (128x64 dot)

• 4 Leds for signalization

• Multilanguage Display (English/Italian

standard, available - others on request)


with dedicated relay

Communications

• 1 RS485 Serial communication port on rear side

• 1 RS232 Serial communication port

on front panel

• Modbus RTU/IEC870-5-103/IEC61850/

TCP-IP Modbus

Communication Protocols

• Canbus port for external additional modules

Expansion Modules (optional)

• “UX10-4” 10 Digital Inputs

and 4 Output Relays

• “14DI” 14 Digital Inputs

• “14DO” 14 Output Relays

Execution

• 2 Module box (3 modules with 1 expansion,

4 modules with 2 expansion)

• IP44 protection case (on request IP54)

• Totally draw-out execution

Software

• MSCom2 Program interface for device

management

57

F MRRS232

OPEN

POWER

TRIP

C LOSED

X

U 30.00 kVf 50.01 HzP 5190 kW Q 2514 kVA r

I 100 A

<Menu>

ULT R A-M R E L AY

I

O

EXPANSIONUNIT

F MRRS232

OPEN

POWER

TRIP

C LOSED

X

U 30.00 kVf 50.01 HzP 5190 kW Q 2514 kVA r

I 100 A

<Menu>

ULT R A-M R E L AY

I

O

A B C A B C

In= 1A 5AIon= 1A 5A

Un= 23OVac MAX.AUXILIARY

SUPPLY

2

34

56

78

9

41

4243

4445

46

47

48

2

34

56

78

9

41

4243

4445

46

47

48

1/5A

1/5A

1/5A

1/5A

MS-SCE1844-R3FRONT- RS232

BPU

S+S-C

CHL

CAN

RS485

Io

Vo

ULTRA

Feeder

Manager

Relay

POWER

TRIP

ON

OFF

R1

R2

R3

R4

R5

R6

R1

R2

R3

R4

R5

R6

D1D2D3D4

DIGITALINPUTS

TRIPCOIL SUP.

(25)

N.O.

N.C.

EXPANSIONMODULE

2526

15142435

34

23

33

32

132231

1228182919382717

16

3637

Wiring Diagram


F MRRS232

OPEN

POWER

TRIP

C LOSED

X

U 30.00 kVf 50.01 HzP 5190 kW Q 2514 kVA r

I 100 A

<Menu>

ULT R A-M R E L AY

I

O

EXPANSIONUNIT

F MRRS232

OPEN

POWER

TRIP

C LOSED

X

U 30.00 kVf 50.01 HzP 5190 kW Q 2514 kVA r

I 100 A

<Menu>

ULT R A-M R E L AY

I

O

A B C A B C

In= 1A 5AIon= 1A 5A

Un= 23OVac MAX.AUXILIARY

SUPPLY

2

34

56

78

9

41

4243

4445

46

47

48

2

34

56

78

9

41

4243

4445

46

47

48

1/5A

1/5A

1/5A

1/5A

MS-SCE1844-R3FRONT- RS232

BPU

S+S-C

CHL

CAN

RS485

Io

Vo

ULTRA

Feeder

Manager

Relay

POWER

TRIP

ON

OFF

R1

R2

R3

R4

R5

R6

R1

R2

R3

R4

R5

R6

D1D2D3D4

DIGITALINPUTS

TRIPCOIL SUP.

(25)

N.O.

N.C.

EXPANSIONMODULE

2526

15142435

34

23

33

32

132231

1228182919382717

16

3637

185 134



164

164

135

195

213

232


R e l a y s58

Measurements

• Real Time Measurements

• Trip Recording (last 5 trips with date & time)

• Load Profile recording


The Relay Main Body (RMB) includes:

• 2 Self powered programmable Digital Inputs for remote controls (start, stop, rev., ETC)

• 1 RTD input or User available Digital Input

• 2 Programmable output relays each with one N.O. contact rating 6A

• 1 RS485 port for connection to the communication serial bus (Modbus RTU)

• 1 RS485 port for communication to the Front Face Panel

• 2 Signal Leds, 1 Reset button

The Front Face Panel (FFP) includes:

• 2x16 characters LCD display

• Four Key buttons for local relay management, Four signal leds

• One RS232 port for connection to a local PC (on front side)

• One RS485 port for interconnection with the RMB (on back side)


Mounting

• DIN46227 (EN50022)

N-DIN-MA Motor Protection Relay: 37, 46, 49, 51, 51LR, 64/51N, 66

N-DIN-F Feeder Protection Relay: 46, 49, 51, 50N/51N, 51BF

N-DIN TO64 D.C. Current Relay with High Sensitivity Hall Effect Transducer: 64, 51BF

Accessories

EX-I/O Input/Output Expansion Module

CPB Profibus Converter Module

TA-DIN Current Transformer

TAR-DIN Current Transformer

Relays Type

N-DIN line General Characteristics

The N-DIN line has been conceived to obtain the most efficient space/performance as well

as cost/performance ratio. The execution of the relay is for DIN Rail, but its Front Face Panel

(FFP) - including Controls, Signals and Display - is removable and can be flush mounted apart

from the Relay Main Body (RMB), on the front panel of the switchboards or the motor control

centres. One FFP only can control up to 31 RMB units. The relay main body RMB can also be

used as a stand-alone unit, without the front panel FFP.

59

96

35 O3

90

PANELCUT -OUT

DIN 46277(EN 50022)

FFP Height = 16

45

1 60

85

50

RMBHeight = 72

TRASPARENT COVER Dimension 45x108

Height = 9 REMOVABLEFRONT FACE

(FFP)

1 60

610

A B C

15

14

13

12

10

11

15

14

13

12

10

11

15

14

13

12

10

11

8976

21

22

A B C A B C

Digital Input 1Digital Input 2Digital Input 3

Common

AUXILIARYSUPPLY

MSSCE1872R1

D3

D2D1

RS485A B + 0

A B + 0

FFPDispay / Keyboard / Signal

RS485 RMB

RS485

TOEXI/O

FUNCTION

PWR / I.R.FTripONOFF

F26F37F46F49F51

F51 LRF64

St. Ctrl

N DIN MA R1

R2

19

20

16

17

12

3

45

B S

A S+

H

L

C

Wiring Diagram


96

35 O3

90

PANELCUT -OUT

DIN 46277(EN 50022)

FFP Height = 16

45

1 60

85

50

RMBHeight = 72

TRASPARENT COVER Dimension 45x108

Height = 9 REMOVABLEFRONT FACE

(FFP)

1 60

610

A B C

15

14

13

12

10

11

15

14

13

12

10

11

15

14

13

12

10

11

8976

21

22

A B C A B C

Digital Input 1Digital Input 2Digital Input 3

Common

AUXILIARYSUPPLY

MSSCE1872R1

D3

D2D1

RS485A B + 0

A B + 0

FFPDispay / Keyboard / Signal

RS485 RMB

RS485

TOEXI/O

FUNCTION

PWR / I.R.FTripONOFF

F26F37F46F49F51

F51 LRF64

St. Ctrl

N DIN MA R1

R2

19

20

16

17

12

3

45

B S

A S+

H

L

C


R e l a y s60

MSCom2 Interfacing Program

MSCom2 is a communication program for Windows systems allows to:

• Simultaneously communicate on serial port with up to 250 Microelettrica Scientifica relays

• Save data coming from relays on disk

• Manage the configurations of many relays at the same time and store information

on hard disk

• Print data as tables or diagrams

• Periodically poll the relays and send measurement or event data directly

to the hard disk or a printer

• Access the relays via modem (PC-modem …….. modem-relays)

• Access the relay over TCP/IP protocol

• On-line firmware update

• Prepare off-line relay setting files and directly up load relay’s memory

System Requirements

• IBM P.C. compatible computer

• Pentium 3 microprocessor (recommended Pentium 4 or higher)

• Min. 1 MByte RAM (recommended 2 MByte)

• Min. 200MB free on hard disk

• Min. 1 serial port dedicated to communication

• Resolution min.: 640 x 480, 256 colors (recommended 1024x768, 65535 colors)

• Keyboard

• Mouse

• Operating systems: Microsoft Windows

ULTRA-Line, MC-LIne, M-Line, N-DIN-Line

Supported Lines

61


MSCom2 Software

Actual Measurements

Function Settings

System Settings

Oscillographic wave form

R e l a y s62

MHCO-TV

For VOLTAGE measurement.

Directly connected to the

high voltage line up to 6kV

through internal voltage

divider.

MHCO-TI

For CURRENT measurement.

Connected to the high

voltage line through

a dedicated shunt

(not supplied).

MHCO-TVI

For combined CURRENT

& VOLTAGE measurement.


voltage line up to 6kV


divider & through a

dedicated shunt (not

supplied).

The MHCO line includes three models:

Highlights

• HV Transducer for Current & Voltage measurement

• Direct Connection up to 6kV

• Fibre Optic connection between HV transmitter and LV receiver

• Measuring channel fully redundant

• Autoranging Multivoltage Power supply (self-powered version available as optional)

• Compatible with traction application standard

Transmitter Unit

Three different models available, one for each type of transducers (current, voltage and

current/voltage). Directly connected to the High Voltage DC system acquires the input signals

by a redundant input channel and transmit them, after comparison and confirmation of

validity, to the receiver unit through dedicated Fibre Optic connections. It has an autoranging

multivoltage Power supply. As option a self powered version is available; in this case

the power supply is directly taken from the line voltage through a set of dumping resistors.

Receiver Unit

Two models available, respectively suitable to be connected to the current and to the voltage

transmitter by means of a dedicated Fibre Optic connection. The input signal is converted

into 4 linear analogue output signals independently programmable (ie. 0-20/4-20mA etc..).

The setting of this unit can be easily done using our MSCom2 software tool.

MHCO lineDC measuring converter


The DC measuring transducers MHCO are the transducers for high voltage

measurement designed by Microelettrica Scientifica. The MHCO are designed

and manufactured to allow safe and full isolated HV measurement of DC

currents and Voltages. They find their main application in all the DC Traction

Substations (Railways, Tramways and Metro) where, directly connected

to the high voltage systems (750V, 1,5kV and 3kV) gives very accurate

and safe analogue outputs for measuring and protective purposes.

63

The receiver is equipped with two output relays: one relay is used for self diagnosis (it trips in case of interruption

of the Fibre Optic channels or internal failure of the receiver unit, including power supply failure or as alarm for measurement

discrepancy between the two transmitter channels); the second relay can be programmed as alarm for under/over voltage

and/or current level. Optionally a Front face display and Keyboard panel is available for local measurement and programming.

Fibre Optic Link

Transmitter and Receiver units are connected by means of a Fibre Optic link which guarantee a very hight insulation level.

Two Fibre Optic type are available both provided with standard ST connectors:

PLASTIC FIBRE: 62,5/125µ

GLASS FIBRE: 200 m HSC

The standard length of the fibre optic connection is 5 meters, other lengths are available on request.

Characteristics Transmitter/Receiver

Measurement solution: 0.1% of full scale @ (20/+70)°C

Responce time: 200ms

Connection: Fiber optic type 200.230.500m HCS (plastic) or 62.5/125m (glass) connection type ST

Fiber optic standard length 5m (max 1 km with glass fiber)

(*) Version with optional display shown in the �gure

(*) (*)

MHCO-T-V

ALARM(OPTIONAL)

DIAG. EXT. RESET(OPTIONAL)

EXT. RESET(OPTIONAL)

MHCO-T-VI MHCO-T-I

MHCO-R-V

OUT 3OUT 2

OUT 1

ALARM(OPTIONAL)

DIAG.

MHCO-R-I

OUT 3OUT 2

OUT 1

Vaux Vaux

Vaux Vaux Vaux

Wiring Diagram


T r a n s d u c e r s 64

MHIT-V

For VOLTAGE measurement.

Directly connected to the

high voltage line up to 6kV


divider

MHIT-I

For CURRENT measurement.


voltage line through

a dedicated shunt

(not supplied)

MHIT-VI

For combined CURRENT

& VOLTAGE measurement.


voltage line up to 6kV


divider & through a

dedicated shunt

(not supplied)

The MHIT line includes three models:

Highlights

• HV Transducer for Current & Voltage measurement

• Direct Connection up to 6kV

• Fibre Optic connection between HV transmitter and LV receiver

• Measuring channel fully redundant

• Autoranging Multivoltage Power supply (self-powered version available as optional)

• Compatible with traction application standards

Transmitter Unit

Three different models available, one for each type of transducers (current, voltage and

current/voltage). Directly connected to the High Voltage DC system acquires the input signals

by a redundant input channel and transmit them, after comparison and confirmation of

validity, to the receiver unit through dedicated Fibre Optic connections. It has an autoranging

multivoltage Power supply. As option a self powered version is available; in this case the

power supply is directly taken from the line voltage through a set of dumping resistors.

Receiver Unit

Two models available, respectively suitable to be connected to the current and to the voltage

transmitter by means of a dedicated Fibre Optic connection. The input signal is converted

into 4 linear analogue output signals independently programmable (ie. 0-20/4-20mA etc..).

The setting of this unit can be easily done using our MSCom2 software tool.

MHIT line DC measuring converter


The DC measuring transducers MHIT are the latest generation of transducers

for high voltage measurement designed by Microelettrica Scientifica. They are

the result of the long experience of Microelettrica in this field with the addition

compared to the previous line (MHCO) of the full redundancy of the measuring

channel which gives a further level of reliability to the product. The MHIT are

designed and manufactured to allow safe and full isolated HV measurement

of DC currents and Voltages. They find their main application in all the

DC Traction Substations (Railways, Tramways and Metro) where, directly

connected to the high voltage systems (750V, 1,5kV and 3kV) give very

accurate and safe analogue outputs for measuring and protective purposes.

65

+_

+_

+_

MHIT-TV MHIT-TVI MHIT-TI

LIN

E

LIN

ELI

NE

MHIT-RV MHIT-RI

R1

R2

Vaux Vaux

CH3

CH4

CH2

CH1CAN Bus

R1

R2

CH3

CH4

CH2

CH1CAN Bus

C B C B A B A

C B A

The receiver is equipped with two output relays: one relay is used for self diagnosis (it trips in case of interruption

of the Fibre Optic channels or internal failure of the receiver unit, including power supply failure or as alarm for measurement

discrepancy between the two transmitter channels); the second relay can be programmed as alarm for under/over voltage

and/or current level. Optionally a Front face display and Keyboard panel is available for local measurement and programming.

Fibre Optic Link

Transmitter and Receiver units are connected by means of a Fibre Optic link which guarantee a very hight insulation level. Two

Fibre Optic type are available both provided with standard ST connectors:

PLASTIC FIBRE: 62,5/125µ

GLASS FIBRE: 200 m HSC

The standard length of the fibre optic connection is 5 meters, other lengths are available on request.

Characteristics Transmitter/Receiver

Measurement solution: 0.1% Vn/0.05% Full Scale (2Vn)

channel (0¸1)In-0.05% In/0.05% Full Scale

channel (0¸10)In-0.5% In/0.05% Full Scale

Accuracy class: 0.2

Response time: 200ms

Connection: Fiber optic type 200.230.500m HCS (plastic) or 62.5/125m (glass) connection type ST

Fiber optic standard length 5m (max 1 km with glass fiber)

Wiring Diagram


G L i n e66

G PRO LineDC SUBSTATION PROTECTIVE RELAY32, 45, 49, 64, 76, 79, 80


DC Feeder protection relay with setting parameters

programmable locally or via serial communication.

Suitable for protection of DC Feeders with

High-Speed DC Breakers, for railway application.

The relay measures the line current and voltage through

one transducer connected by a fiber optic.

The transducers (type MHIT) are galvanically insulated

via fiber optic and have the following measuring ranges:

• Real time measurements of primary input values can

be read continuously both from the optional display

and via communication protocols.

• Relay programming can be done both

via HMI and via serial communication.

Besides the normal Watchdog and Powerfail functions,

a comprehensive program of self-test and self diagnostic

provides:

• Diagnostic and functional test

• Dynamic functional test running during normal operation.

Any internal fault detected is indicated by a fault message

on the display and by de-energization of associated I.R.F.

output relay.

Automation

• Number of inputs and outputs can be customized

to mach the application needs

• PLC features are available in the protection

• Automation Blocks allow an easy setting

of the substation logics

Recording

• Six complete setting programs switchable locally or remotely

• Blocking input and Blocking output for pilot wire selectivity

coordination and intertripping scheems

• Event Recording (up to 1000)

• Trip Recording complete with cause of tripping and values

of the input quantities at the moment of trip (up to 1000)

• Oscillographic recording of input quantities

with programmable pre-trigger

Communications

Modbus RTU / IEC870-5-103 / IEC61850 (redundant)

on RJ45 and fiber optic communication protocols;

other on request

• USB 2.0

• RS485 serial communication port on Back Panel

• Synchronisation with other relays (resolution 1ms)

and with SNTP

• Transducer Direct Optical Fiber Plug-In

• Ethernet on RJ45 or Fiber Optic

Accessories

• High-Voltage Current/Voltage measuring Transducer

with Fiber Optic output: Type MHIT

• Cable monitoring system MSG/N-DIN independent tripping

and measurement

• Cable Screen-to-Ground and Conductor-to-Screen monitoring

REMOTE DISPLAY CONTROL

4.3” 10.4”

67


Typical Characteristics

Accuracy at reference value of influencing factors 1% In for measurements

2%+/-10ms for times

Input 0 ÷ 40 mA or Fiber Optic

Output 0 ÷ 40 mA or 0 ÷ 10V

Output trip relays rating 5A; Vn = 380V

A.C. resistive switching = 1100W (380V max)

make = 30 A (peak) 0.5 sec.

break = 0.3A, 110Vcc,

L/R = 40 ms (100.000 op.)

Order code - Example:

G-Pro 1 1 1

Power Supply Input Output

1 = Type 1 : 24V(-20%) / 110V(+15%) a.c. - 24V(-20%) / 125V(+20%) d.c. 1 = 0 ÷ 40 mA 1 = 0 ÷ 40 mA

2 = Type 2 : 80V(-20%) / 220V(+15%) a.c. - 90V(-20%) / 250V(+20%) d.c. 2 = Fiber Optic 2 = 0 ÷ 10V

68 D i r e c t d r i v e n a x i a l f a n s

Applications

Aircoolers

Heat exchangers / Radiators

Cooling of electrical machines (motors, converters, inductors, generators, transformers)

Naval

Ventilation and Air Conditioning Plants

The medium performance “AF” and “LA” fan Series were designed to meet the majority

of cooling and ventilation requirements typical of industrial applications. They were conceived

to provide the best mix of reliability, versatility, performance, quality, environmental impact

and cost. All of these products have features making them easily compliant with the most

widespread technical specifications and allowing significant modification based on specific

customer requirements. Direct-coupling solutions with motors from 2 to 16 poles are

available, to suit fan performance and noise requirements. Belt-driven solutions with larger

diameters and selected speed are also available (see “AFT”).

The “AF” and “LA” Series are versatile and reliable, characteristics that make them the COMET’s

most successful products, suitable for the most frequent ventilation needs. COMET “AF”

and “LA” Series of fans have proved their efficiency every day in over 60 countries worldwide,

in extreme climates, harsh environments and a wide range of temperatures for the most

demanding operations.

These Series of fans are selected using COMET’s dedicated software, based upon the results

of a huge number of tests performed by COMET on test tunnels and actual installations.

The selection is based on five blade profiles in aluminium alloy, and others in fibreglass

or polypropylene, with number of blades varying between 3 and 12 blades.

AF

• Impellers with aerofoil profile blades in extruded aluminium alloy low-noise type

• Adjustable blade pitch when standstill

• Three-phase motors IP55 with Class F or H insulation, 50/60Hz, 2-16 pole, from the best

European manufacturers

• Casings in carbon steel, electro-welded, with anti-corrosive finishing by hot-dip

galvanization

Wide range of ancillary parts and customizations

Special versions with special materials, certified components, motors according

to customer’s specifications.

Impellers in PPG, FRP or steel are available upon request

LA

• Impellers with aerofoil profile blades in PPG, low-noise type

• Three-phase motors IP55 with Class F insulation

• Casings in carbon steel, electro-welded

• Finishing by hot-dip galvanization: longer durability in harsh environment


AF/LA Series

69

Series Diameter [mm] Air Flow Pressure Power [kW]

AF 400 ÷ 2400 up to 400000mc/h up to 1500Pa 0.55 ÷ 90

LA 310 ÷ 800 up to 35000mc/h up to 800Pa 0.25 ÷ 7.5

Technical Data

AFLA


70 B e l t - d r i v e n a x i a l f a n s

Applications

Aircoolers

Heat exchangers

Cooling towers

Condensers

Ventilation Plants

The “AFT” Series fans are designed for applications requiring very high air flows

and medium-low pressures, when it is impossible or unadvisable to couple the impeller

direct to the motor.

They are normally used in the presence of:

• large diameters (air coolers, heat exchangers, cooling towers)

• dusty atmospheres

• high temperatures of the air flow

• low noise installations

• need to set the motor outside the air flow for access

Supports and drives are sized by COMET according to criteria based on 20 years of experience

and hundreds of installations. For some models the bearing blocks are designed and built

entirely by COMET.

The “AFT” Series fans are selected using the COMET’s dedicated software, which provides

a clear and concise data sheet with operating curves, including electrical and noise level data,

as well as preliminary outline drawing. The selection is based on five blade profiles, with number

of blades varying between 3 and 12 blades. This versatility gives unrivalled design options

when selecting a fan unit.

• Impellers with aerofoil profile blades in extruded alluminium alloy low-noise type

• Adjustable blade pitch when standstill, or autovariable in operation

• Three-phase motors IP55 with Class F or H insulation, 50/60Hz, 2-16 pole,

from the best European manufacturers

• Casings in carbon steel, electro-welded, with anti-corrosive finishing by hot-dip

galvanization

• V-belt or toothed belt drive, with heavy-duty bearing blocks and external grease lines


Versions with special materials, special dimension, motors according to customer’s

specifications.

Impellers in PPG, FRP or fitted with anti-corrosion coatings are available upon request


AFT Series

71

Technical Data

Series Diameter [mm] Characteristics Power [kW]

AFTE 800 ÷ 2240 Motor mounted outside the fan and the airflow 0.55 ÷ 45

AFTS 2000 ÷ 4800 With vertical axis, motor mounted 0.55 ÷ 90

under the fan ring on a bridge (for aircoolers)

AFTN 1600 ÷ 2240 Motor mounted inside the fan casing, fully enclosed 0.55 ÷ 55

AFTE

AFTN

AFTS


72 H i g h e f f i c i e n c y a x i a l i m p e l l e r s

Applications

Aircoolers

Heat exchangers / Radiators

Cooling towers

Condensers

Axial Fans

COMET aluminium impellers come in 4 different construction types, aimed at satisfying

numerous industrial applications. COMET manufactures 10 different blade profiles and three

different impeller designs, giving rise to one of the most extensive and efficient product

ranges available on the market.

The larger Series can be selected for large installations with diameters up to 12 metres.

The smaller Series are suitable for installation on equipments, machineries or in environments

requiring ventilation or cooling, and on small and medium fan units with diameters starting

from 350mm.

The “MAP” and “AVP” Series impellers have high-efficiency and low-noise blades made

of extruded alluminium alloy. All “MAP” models have variable pitch blades with motor stopped,

while “AVP” impellers have variable pitch blades in operation. They were designed to provide

precise and continuous adjustment of the air flow as the thermal conditions of the system

vary. The blade pitch variation is controlled pneumatically and these impellers are supplied

complete with rotating joint for connection to the line and with precision position valve.

Special versions of all COMET impeller Series are available for critical operating conditions

or special environments.

The extensive production in aluminium is supported by “MF” and “XF” Series of impellers,

with blades made of fiberglass-reinforced plastic (FRP-GRP-PPG). These Series have Very

Low-Noise characteristics and are suitable for corrosive environments.

By using COMET selection software, it is possible to select the most advantageous

combination of speed, number of blades and blade profile to obtain the best results

in terms of noise and power consumption.

MAP/AVP/MF/XFSeries

Technical Data

Series Blade Material Hub Type Blade Series Diameter Range [mm]MAP Aluminium F 12 / 1N 350 ÷ 1000 P 1N / 2N / 3N / 31 500 ÷ 3100 D 2N / 3N / 4N / 8N / 31 / 51 1000 ÷ 12000AVP Aluminium P 1N / 2N / 3N / 31 1120 ÷ 3100 D 2N / 3N / 4N / 8N / 31 / 51 2000 ÷ 8000

MF FRP – GRP D MF 1200 ÷ 10000

XF FRP – GRP D XF 2000 ÷ 12000

73

MF

AVP

MAP


74 For classified areas (Zone 1/21 and 2/22)

Most of COMET’s fans can be supplied in the ATEX certified version (Directive 94/9/EC).

Series AF/AFT/AFH/AFTH/CNX are always available in ATEX versions.

All these fans are equipped with motors and components of leading brands and are

rigorously certified.

Materials and components are checked and recorded for complete traceability.

Design, manufacture and testing are carried out by COMET in accordance with the procedures

established by the COMET ATEX Technical File, filed with ICIM (ATEX Notified Body).

COMET products are certified for the following categories:

• Group II, category 3G

• Group II, category 3D

• Group II, category 2G

• Group II, category 2D

The general characteristics and the performances of the products do not vary when

they are produced in the ATEX versions. At the same time, it is still available an high grade

of customization according to the installation needs and the project specifications.

ATEXFans

• Impellers in carbon steel, stainless steel, alluminium, FRP or PAGAS

• Three-phase motors IP55/IP65, with Class F or H insulation, T3 / T4, Ex-N / Ex-d, 50/60Hz,

suitable for inverter supply

• Casings in carbon steel or stainless steel, electro-welded, with bolted anti-spark track

• Finishing by 3-layers epoxy-pack painting, certified for 500 hours salt mist test resistance,

or hot-dip galvanization

• Cables and electrical components made by leading brands and certified

• ATEX certificate and running test report is supplied with each unit


Versions with special materials, special dimension, motors according to customer’s

specifications.


Applications

Refineries

Chemical plants

Turbines

Plants and installations with

presence of dangerous gas or dust

ATEX

75For classified areas (Zone 1/21 and 2/22)

Technical Data

Series Diameters [mm] Characteristics Power [kW]

AF-Ex 400 ÷ 2400 Medium-performance direct drive Axial 0.55 ÷ 90

AFT-Ex 1000 ÷ 4800 Belt driven Axial 1.5 ÷ 75

AFH-Ex 400 ÷ 1800 High Performance Axial 1.1 ÷ 90

AFTH-Ex 200 ÷ 700 Belt-Driven High Performance Axial 0.55 ÷ 30

CNX-Ex 400 ÷ 1400 Centraxial 1.5 ÷ 55


For information on sales

network and products please visit www.microelettrica.com

5020

730 -

INB

- Rev

. Sep

tem

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014

Microelettrica USA

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MS Resistances France

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Comet Fans Italy

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MST Elektroteknik Turkey

MS Sales Office within KB Moscow Russia

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MS localization within Knorr-Bremse India

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