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7/29/2019 Telecom Application
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Totally Focused.Totally Independent.
Totally Committed toTelecom Applications
7/29/2019 Telecom Application
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The PedigreeThere are several reasons why Mecc Alte is the
leading independent manuacturer o world-
class synchronous alternators. Here are just a
ew o them.
We only make one kind o product. Thats why
were always totally ocused on producing high
quality synchronous alternators.
Were totally independent. Thats why we
never complete with any o our customers in
the end market.
We believe in the power o partnerships. Thats
why we constantly, and consistently, aim to be
the most reliable partner or companies working
in the energy eld.
Were strategically ocused. Thats why we ofera single range rom 1 to 3000kVArom portable
alternators to machines or industrial use.
We do everything. From the design and
personalisation o our high quality products right
through to solutions to technical problems and
ater-sales assistance.
And we do everything ourselves. We have total
control o our sales and distribution and total
control over all o the components we use.
IntroductionAs the incessant demand or wireless communication
grows, o-grid telecommunication base station
sites continue to be introduced around the globe.
In rural or remote areas, where power rom the grid
is unavailable or unreliable, these cell sites require
generator sets to provide power securityas prime
power or backup standby power.
The power requirement or a base transceiver
station can vary upon location and load beingsupplied. Typically, an AC cell station load consists
o AC air-conditioning units, AC or DC lights, switch
mode power supplies to convert AC to DC and
battery banks.
The total cost o ownership (considering outlay,
serviceability, uel costs and eciency o these
power generation systems) is a major consideration
or operators. The type o system chosen, and its
eciency, can have a major impact on these costs.
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Totally Focused
Totally Independent
Totally Determined to ForgePowerul Partnerships
Totally Committed to Strategic Innovation
Totally in Control o Production, Sales,Distribution & Components
7/29/2019 Telecom Application
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Which Power Generation System?
Mecc Alte oers a ull range o power solutions or Telecom
applications developed rom our extensive experience, technical
expertise and excellence in the power generation market. With
hundreds o thousands o AC generators sold each year, our solutions
start rom the market-proven standard AC systems and run through
to state-othe-art variable speed and DC solutions or the more
advanced installations.
The Big Question
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AC Energy Systems
The standard range o Mecc Alte 4 pole AC
alternators includes all the equipment needed to
provide the highest perormances requested by the
telecom applications. Using high quality materials
and advanced designs, they have market-leading
eciencies that will lead to uel savings. Whatsmore, the high motor starting capability o every
machine enables you to select a smaller generator
to cope with the same load application, ensuring
the most economical solution.
DC Energy Systems
Mecc Alte also has great experience in producing
Conventional Rotor Wound DC machines.
The conjunction o a conventional three or six phase
machine, with a special AVR controlling both the
Voltage and the maximum current resulting in arobust, compact and easy to use DC power solution.
Hybrid Mercurio Systems
Listening to the markets needs, we have
developed our Mercurio system which is a simple,
reliable, plug and play, exible and competitive
solution or the telecom market. The oundation o
the system is a dual ocus power converter. On one
side it embeds all the logic to control the gen set
when the DC battery set needs to be re-charged
as well as with the speed control. On the other it
accepts power inputs, rom any possible powersupply, including conventional and existing
Mecc Alte AC generators, Mecc Alte PMG Vispa
generator, Solar Panels, Small wind turbines and
power supply rom the grid as well.
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Battery 2
BTS 1
BTS 2
Battery 1
AncillariesAC Air
conditioning
units
Lighting
& small
AC power
-48VDC
2 - 3 x SMPS
units, comprising
continuous &
standby duties
Distribution
Panel
Automatic
transfer
switch
Grid
power
supply
AC
generator
Traditional AC Energy Systems
Traditionally conventional AC diesel driven generating sets
are installed within the Base Transceiver Station to provide
site load. Within each base transceiver, AC power is used
to power air conditioning units to cool the electronics and
also the batteries. This AC power is converted by site base
rectifers to provide the DC power needed or the BTS loadand battery charging.
AC Alternator System
Mecc Alte AC alternators are a proven solution used in many
applications globally. Their high eciency and minimum
maintenance make them an ideal telecom power selection.
With an auxiliary winding system and low maintenance the
alternator is a compact and economical solution.
Air conditioning motors absorb high current rom the power
supply upon starting so the selected AC generator must
be able to deliver this peak start up demand, typically they
are oversized. As these AC generating sets are normally
sized based on these transient requirements o the air
conditioning units, a lower Xd value proportional to the
SMPS loads being applied is preerred. Load creates a
current distortion which then induces a resulting voltage
distortion rom the alternator. Again this is generally
minimised by machine selection and over sizing to cover thetransient load requirements.
The Mecc Alte brushless digitally regulated, AC Alternator
range is ideally suited to the demands o this telecom
application, with each alternator ftted as standard with
the ma_AUX auxiliary winding system it can provide
superior motor starting capabilities allowing up to 300%
overload or 20 seconds. With class leading low Xd (sub-
transient reactance) the alternators perormance with non
linear loads is enhanced. Thus, typically no over sizing is
needed allowing the generating set provider the most cost
eective package.
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Alternator exploded view
High transient power or economic alternator selection.
Low reactance (Xd) values to enhance motor starting and
perormances with non-linear loads.
Volts/Hz characteristic underspeed protection voltage
reduces proportionally to rpm to limit excitation current.
rom a set threshold, to protect against over excitation
should the engine ail to reach ull speed.
Overload protection (operational ater 20 seconds to avoid
tripping on motor starting)
A selection o advanced winding protection rom
GREY, TOTAL & TOTAL+ to suit even the harshest o
environmental conditions.
Inlet lters and higher IP protection levels available on all
sizes to suit all applications.
+/-1% digital voltage regulation as standard.
[Option or +/-0.5%.]
>300% overload rom the ma_AUX auxiliary winding or
20 seconds.
Alternator Perormance Indicators
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Type A C E F CG
28-1VS/4 405 225 / / 200
28-2VS/4 405 225 / / 200
28-0S/4 445 285 / / 214
28-S/4 445 285 / / 21728-M/4 480 285 131,5 71 238
28-2L/4 525 285 171,5 111 254
28-VL/4 555 285 171,5 111 274
SAEN.
Disc Coupling
L d Q1 S1 a1
6 1/2 30,2 215,9 200 9 60
7 1/2 30,2 241,3 222,25 9 45
8 62 263,52 244,47 11 60
10 53,8 314,32 295,27 11 45
11 1/2 39,6 352,42 333,37 11 45
SAE N.Flange
O P Q a
5 356 314,3 333,4 45
4 403 362 381 30
3 451 409,6 428,6 30
2 490 447,7 466,7 30
Main Rotor & Stator
Impregnated using the latest trickle technology,
the non-hygroscopic resin is added to the windings
and then cured in the same process while rotating
to ensure best coverage possible. The insulation
materials used are Class H throughout. Copper
used or the main windings is G2 with two layerso enamel; the winding or the ma_AUX is G4
with our layers! Add to this then the rubber like
butadienic over the main and exciter stators and
EG43 compound over the main and exciter rotors
and you have a very high degree o protection
against harmul particle ingress.
Excitation System
The brushless excitation system takes the DC
voltage rom the DSR regulator according to load
changes. The DSR power is derived rom the
ma_AUX, auxiliary winding within the main statorwhich uses the 3rd harmonic to have high levels o
power when starting motors.
Bearings
Sealed or lie, quality ball bearings are used
throughout with oversize bearings at the driven
end to accept the side loading in belt driven
applications. Rear bearing is outboard o the
exciter or easier examination o rectifer assembly.
Motor Starting
Key to the telecom application is the ability to
accept large impact loads relative to the size o
the alternator. The ma_AUX system used in over
90,000 machines each year is well proven. It
provides over 300% power or 20 seconds which is
easily enough or most aircon motor. The voltage
dip will vary according to the level o the impact
load but typical TVDs would be 15% with 100%
load on, 25% with 200% load on & 35% with 300%
load on.
Flat drawing o typical alternator
ECP28 MD35 arrangement
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Battery 2
BTS 1
BTS 2
Battery 1
AncillariesLighting
& small
DC power
Distribution
Panel
Automatic
transfer
switch
DC
generator
PV
-48VDC
DC Energy Systems
With the telecom market the need or AC air conditioning
is reducing and as such the primary loads are DC. Other
site loads such as lighting, heating, remote monitoring
and air outlet damper motors can easily be designed or DC
operation using DC-to-DC converters. Thereore a DC power
generator system may be a more eective on site solution.
This can be a traditional generator system with a DC
alternator or a more complex hybrid system, although more
expensive than the AC systems.
Hybrid power system principle such that it is more ecient
to charge the batteries directly which then supply the
7/29/2019 Telecom Application
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Base Transceiver Station, rather than power the station
continually. These systems are operated at speeds
and powers to suit the battery type, and cutting in and
out at pre-set battery charge levels. This means that
the generating set is not continually running allowing
considerable uel savings. Base Transceiver Station
systems are traditionally 48VDC, a legacy o the telecom
market and typically being positive grounded this is
considered better or use with common valve regulated lead
acid (VRLA) batteries.
Other hybrid systems might also consider inputs rom solar
and wind sources.
Mecc Alte Range O AL DC Alternators
Founded upon common principles and sharing components
and eatures o the AC alternators supplied to the telecom
market, Simple construction ensures maximum reliability
whilst minimising maintenance.
The Mecc Alte range o AL, DC alternators are well proven
supplied as either 3, 6 or 9 phase AC rectifed machines
with voltage controlled as a unction o the DC output
(rather than AC output) rom the rectifer sensing the DC
side o the rectifer ensures correct excitation with DC load
changes, guaranteeing a more stable output.
Voltage control is by the RT regulator. When supplied with
a current sensing transormer, the RT acts as a battery
charging regulator limiting the maximum amps that can
be drawn with adjustable potentiometers, and the also
the oat or trickle charge which is certainly a prerequisite
or VRLA batteries. The voltage is controlled and rises as
a unction o the connected system. With voltage ripple
down to less than 2%, the trade o cost versus battery
lie expectancy is acceptable with most battery suppliers
anticipating 3.5 year lie.
The AL machines may be supplied as fxed speed, dual
speed or variable speed. The limitations o speed range are
mainly due to the engines speed/power curve and the BTS/
battery load.
External generating set controls are required to switch the
set on and o according to battery charge status.
7/29/2019 Telecom Application
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DC OUT
F1F2F3
L3L2L1 R S2 32 I F E XT
BatteryPack
ElectricGenerator
The Mercurio Hybrid SystemMecc Alte has developed a innovative DC
power convertor which, coupled with a Mecc
Alte AC alternator, will deliver a quality DC
power output customised to suit Cell tower
systems. The MERCURIO system converts the
AC output o a Mecc Alte generator to DC power
whilst unctioning as an alternator and genset
supervisor. This enables it the ability to stop and
start the genset system, it works with fxed, twin
or variable speed control systems. It can also
control AC or DC inputs rom other devices such
as the grid and renewable power sources like solar
panels or micro wind turbines.
Providing electronically conditioned DC output the
voltage ripple levels are down to
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So what are the Mercurio benefts?Simplicity
One plug and go system module or all applications
Outlay costs are minimised
it can be used with our traditional AC alternator allowing
the most cost eective power supply.
Reliability
With proven reliability and technology and minimal
maintenance.
OEM costs can be reduced
use o common bedplates, canopies within existing designsand potentially the same engine systems already used.
Its an economical system
The alternators are sized to suit the load profle and engine
speed/power perormance curves.
It can be used as a hybrid system monitoring battery top
up needs and stopping and starting as needed. It can also
be used in twin speed or variable speed conditions ensuring
maximum uel economy.
High efciency
Typical eciency is 91.9% ay 75% rated output or the
power convertor.
Flexibility
It supports all the Mecc Alte speed systems, and charger
profle can be easily changed.
Hybrid and Grid tie Compatible
It will accept additional AC and DC inputs, as well as a
traditional grid eed 50 or 60Hz.
Protected system
Load delay sot start unction, audible alarm and 8 LED
warning lights.
can urther maximise uel eciency and charging profles
can be individually set to match battery type and optimise
perormance levels although engine control is typically more
expensive and complex subject to calibration.
Not only can the MERCURIO be used with Mecc Altes
traditional AC alternator design it also works with the
Mecc Alte VISPA permanent magnet alternator. Although
more expensive than traditional AC alternator the VISPA
can represent a smaller package compared to the standard
construction machines. The stator wound component is
central to the rotor with three power leads to connect to
the power converter. Magnet type used depends on power
required and the physical size targeted. With alternators
individually sized to suit the load profle and engine speed/
power perormance curves.
ECP28 alternator
Mercurio 5 module
with optional display
VISPA variable speed aternator
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These tests are perormed with rapid aging
methods by means o alternating exposure to
extreme temperatures. Our quality is enhanced
during the production process with computerised
equipment making checks on electronic and
electrical circuits. The high quality o our fnished
products is due to a perect combination-high
perormance and maximum reliability. That
quality is certifed by international bodies such as
the Canadian Standards Association (CSA), the
Underwriters Laboratories (UL) and Det Norske
Veritas (DNV). Further supported by our ISO9001
accreditation rom Registro Italiano Navale (RINA).
Every quality mark is a guarantee o the
painstaking assessment o prototypes and a
commitment to continuous audits by external
inspectors to monitor product consistency and
product quality.
This quality assurance allows us to be proud
o our products. Our products are now globally
recognised. This high market acceptance has
originated rom a combination o eective
marketing through our sales and distribution
acilities, established training plans or our many
customers, and consistently great atersales
service. We are a proessional and responsible
company and understand that a good reputation
breeds success. We also understand that our
reputation depends on continually high standards
o support whenever and wherever it is required.
With an extensive global service and atersales
network, you can be assured that your product will
be supported anywhere in the world.
Our quality is certifed by international bodies and
is supported by our ISO9001 accreditation. This
quality assurance allows us to be proud o our
products and allows you peace o mind knowing
our alternators are built with the highest possible
quality standards.
As a responsible and proessional companywe understand that a good reputation breeds
success. We also understand that our reputation
depends on continually high standards o support
whenever and wherever it is required. With an
extensive global service and ater sales network,
you can be assured that your product will be
supported anywhere in the world.
Our Quality,
Atersalesand ServiceWe have reached the highest possible quality standards in every area o design, production and
sales. With us, the pursuit o quality begins long beore actual production with checks on semi-
processed parts and sample tests on electronic components.
Certifcations Owned by Mecc Alte
7/29/2019 Telecom Application
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Totally Focused.Totally Independent.
Jonathan StokesCommercial Sales Manager
Mobile: +44 (0) 7887 787 292
MECC ALTE (UK) LTD. 6 LANDS END WAY, OAKHAM, RUTLAND LE15 6RF
Telephone: +44 (0) 1572 771160 Fax: +44 (0) 1572 771161
E-mail: [email protected] www.meccalte.com
Suppliers & Manufacturers of A.C Generators Worldwide 1 3000kVA
7/29/2019 Telecom Application
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U.S.A. and Canada
Mecc Alte Inc.1229 Adam Drive
McHenry, IL, 60051
T: +1 815 344 0530
F: +1 815 344 0535
Mecc Alte SpAVia Roma
20 36051 Creazzo
Vicenza ITALY
T: +39 0444 396111
F: +39 0444 396166
United KingdomMecc Alte U.K. LTD
6 Lands End Way
Oakham
Rutland
T: +44 (0) 1572 771160
F: +44 (0) 1572 771161
France
Mecc Alte International S.A.Z.E.La Gagnerie
16330 ST.Amant De Boixe
T: +33 (0) 545 397562
F: +33 (0) 545 398820
SpainMecc Alte Espaa S.A.
C/ Rio Taibilla, 2
Polig. Ind. Los Valeros
03178 Benijofar (Alicante)
T: +34 (0) 96 6702152
F: +34 (0) 96 6700103
E: [email protected]@meccalte.es
GermanyMecc Alte Generatoren GmbH
Ensener Weg 21
D-51149 Kln
T: +49 (0) 2203 503810
F: +49 (0) 2203 503796
Far East
Mecc Alte (F.E.) PTE LTD19 Kian Teck Drive
Singapore 628836
T: +65 62 657122
F: +65 62 653991
IndiaMecc Alte India PVT LTD
Plot NO: 1, Sanaswadi
Talegaon
Dhamdhere Road
Taluka: Shirur, District:
Pune - 412208
Maharashtra, India
T: +91 2137 619600F: +91 2137 619699
China
Mecc Alte Alternator Haimen LTD755 Nanhai East Rd
Jiangsu HEDZ 226100 PRC
T: +86 (0) 513 82325758
F: +86 (0)513 82325768
AustraliaMecc Alte Alternators PTY LTD
10 Duncan Road, PO Box
1046
Dry Creek, 5094, South
Australia
T: +61 (0)8 8349 8422
F: +61 (0)8 8349 8455E: [email protected]
www.meccalte.com Issue 1