Generator Vacuum Circuit-Breakers and · PDF filePage 27 Generator Switchgear, September 2011 HB1- Horizontal Bus Generator Switchgear Special solution for 130MVA grid coupler Main

Schutzvermerk / Copyright-VermerkSeptember 2011, N. Anger

Generator Vacuum Circuit-Breakers and Switchgears

The „green“ solution

Sector Energy, Business Unit Medium Voltage© Siemens AG 2009


Page 2 Generator Switchgear, September 2011

Constant dielectricHermetically sealed vacuum interrupter keeps out all environmental effectsNo degradation of “quenching medium”

Constant contact resistanceIn vacuum, contacts cannot oxidizeThe very small resistance is maintained throughout the contact life

High total current switchedLow contact erosion 10,000 switching operations at rated normal current Up to 50 times rated short-circuit breaking current

Economic advantagesVacuum circuit-breakers are maintenance-freeEasy disposal at the end of life-time

Generator Vacuum Circuit-Breakers – The environmental friendly and economic solution



90

100

80

72

40,5 ≥ 50362417,51512≤ 7,2

40

50

63

Shor

t circ

uit b

reak

ing

curr

ent [

kA]

Rated voltage [kV]

3AH3

3AK

3AH38

3AH37

Product Portfolio High Current & Generator VCB

6300A Gen4000A Gen

3AH37 single pole DTO

4000A

4000A

3150A/4000A

Gen

IEEE Std.

C37.013. 8000/12000A Gen



3AH37/38 Vacuum Circuit-Breaker General Overview

Your Benefits

Reliable switching of generators with high power

Maintenance-free throughout its entire service life

Flexible installation concepts

Very practical and suitable for retrofit solutions

Complete switchgear solutions

Main Data

Up to 24 kV, 6300 A, 72kA

Type-tested acc. to IEEE Std C37.013

For horizontal and vertical installation

Switching in vacuum

Secondary equipment can be easily changed



3AH37/38 Vacuum Circuit-Breaker Product Features

Features

Column construction

Vertical arrangement of the vacuum tubes

Design allows free convection

Solid insulation material is minimised

as far as possible

Your Benefit

High mechanical stability

Compact dimensions

No forced cooling required

Low fire load



3AH37/38 Vacuum Circuit-Breaker Product Features

Your Benefit

Even with horizontal mounting free convection possible

Features

Heat-exchanger can be mounted simply rotated through 90°



3AH37/38 Vacuum Circuit-Breaker Details

Push button “Closed”

Pushed button “Open”

Counter for “Operating cycles”

Indicator „Closed/Open“

Indicator „Closing spring charged“

Hand crankcoupling



3AH37/38 Vacuum Circuit-Breaker Details

Auxiliary switch

Gearbox

Cooling element

Operating unit

Double Post Insulator

Shunt release

Closing spring

Opening spring

Closing solenoid



3AH37/38 Vacuum Circuit-Breaker Technical Datas

3150 A / 4000A5000 A / 6300A

137kA / 173kA / 198kA

50 kA / 63 kA / 72 kA

50/60 Hz

125 kV

60 kV

24 kV

3AH37

3150 A / 4000 A 5000 A / 6300 ARated normal current

137 kA / 173 kA / 198 kA137 kA / 173 kA / 198 kARated short-circuit making current

50 kA / 63 kA / 72 kA50 kA / 63 kA / 72 kARated short-circuit breaking current

50/60 Hz50/60 HzRated frequency

110 kV110 kVRated lightning impulse withstand voltage

50 kV 50 kVRated short-duration power-frequency withstand voltage

17.5 kV17.5 kVRated Voltage

3AH383AH37



3AH37/38 Vacuum Circuit-Breaker Switching Device Compartment

Main Data

Up to 17,5 kV, 6300 A, 72kA

Up to 17,5 kV, 8000 A, 72kA with forced cooling

Earthing switch, voltage and current transformers, lightning arrester and surge capacitor in extra compartment (optional)



3AH37/38 Vacuum Circuit-Breaker Switching Device Compartment (with forced cooling)

Main Data

Up to 17,5 kV, 6300 A, 72kA

Up to 17,5 kV, 8000 A, 72kA with forced cooling

Earthing switch, voltage and current transformers, lightning arrester and surge capacitor in extra compartment (optional)



Main Data

Rated voltage:15 kV

Continuous current: 1200A, 2000A, 3000A, 4000A

Short-circuit current (3s): 40kA, 50kA, 63kA

Switchgear type GMSG-GCB drawout



Main Data

Rated voltage:17,5 kV

Continuous current: 3150A, 4000A

Short-circuit current (3s): 40kA

Switchgear type NXAIR P drawout



High Current and Generator SwitchgearProduct portfolio

HB1 - Horizontal Bus Switchgear

VB1 - Vertical Bus Switchgear

Indoor and outdoor• up to 85 MW @ 10 kV• up to 150 MW @ 17,5 kV

Indoor and outdoor• up to 150 MW @ 10 kV• up to 250 MW @ 17,5 kV

HB3 - Horizontal Bus Switchgear, Phase Segregated

Indoor IP3X• up to 85MW @ 10kV• up to 150MW @ 17.5kV

Outdoor IP54• up to 75MW @ 10kV• up to 130MW @ 17.5kV

Connection mode• cables• insulated busbars• metal enclosed busducts• isolated phase busduct system ( IPB )

Optional feeder • excitation transformer• auxiliary transformer

HIGS – Highly Integrated Generator Switchgear

Integrated solution • generator neutral side equipment included• aux. transformer feeder

Connection mode• directly connected to the generator terminals• top or bottom connection of outgoing feeder by cables or busbars Indoor / Outdoor IP54

• up to 50MW @ 10kV• up to 65MW @ 15kV

• connection by isolated phase busduct systems ( IPB )• optional: auxiliary transformer feeder

Extendable switchgear, for customized and retrofit solutions

Connection mode• cables• insulated busbars• metal enclosed busducts• isolated phase busduct system ( IPB )



HB1 - Horizontal Bus Generator SwitchgearNon-phase segregated design

Enclosure:• indoor application up to IP41

• connection by means of cables, insulated busbars, metal enclosed busbar ducts, insulated phase busbars (IPB)

• optional feeder for aux.-transformer and excitation transformer

Ratings:12kV ( 75kV BIL / 28kV PFWV )17.5kV ( 95kV BIL / 38kV PFWV )

Isc: 50kA / 63kA / 72kA Isc peak: 125kA / 160kA / 180kA

permissible current ( at 40°C )• 6100A @ IP2X • 6000A @ IP3X• 5800A @ IP41

Dimensions• 4000 x 1900 x 2500mm ( W x D x H )• width with aux.-transf.-feeder 6000mm• attached aux.-transf.-feeder 1650 x 1650 x 2500mm



HB1 - Horizontal Bus Generator Switchgear Outdoor version

Enclosure:• outdoor application IP54

• connection by means of cables

• optional feeder for aux.-transformer and excitation transformer

Ratings:12kV ( 75kV BIL / 28kV PFWV )17.5kV ( 110kV BIL / 50kV PFWV, acc. IEEE )


permissible current ( at 40°C )• 4700A @ IP54• 5400A @ IP54 with internal forced ventilation

Dimensions• 6300 x 1900 x 2500mm ( W x D x H )• attached aux.-transf.-feeder 1650 x 1650 x 2500mm



HB1 - Horizontal Bus Generator Switchgear Typical single line diagram

Main Transformer117 (+ 2x1,25%)/10,5kV98 MVA

– Q9

Main current path:Un = 13.8 kVIn = 3.000 AIsc = 50 kAIk = 50 kA, 3sIp = 137 kA

– Q0Ua = 110 V DC

Ua = 110 V DC

– F2

G

Siemens breaker3AH3

MMM

MMMM

30 VA, 5P20

30 VA, 5P203.000/5/5/5 A

– T1

30 VA, cl. 0.2

Ua = 110 V DC

- Q81Ik = 50 kA, 1sIp = 137 kA

MMM

– T5

Option: -W10Temporarily mounted short circuit bridge

Ua = 110 V DC

- Q82Ik = 50 kA, 1sIp = 137 kA

MMM

Uc =14.4 kVIsn = 10 kAIEC 60 099-4Class 4

C = 200 nF

– C2

Option:Aux. T-OFF SWG

-Q91Ua = 480 V AC, 3-ph

Ik = 50 kAIn = 1.000 kA

Manual earthing

Auxiliary transformer

MMM

30 VA, 5P20

30 VA, 5P201.000/1/1 A

– T11

Option:Excitation T-OFF SWG

Excitation transformer

MMM

Ua = 480 V AC, 3-ph

-Q01

-Q87

-F87Ua = 480 V AC, 3-ph

Manual earthing30 VA, 5P20

30 VA, 5P20100/1/1 A

– T21

Un = 17,5 kVIk = 25 kA, 1sIp = 63 kA

MMM

30 VA, 5P20

30 VA, 5P203.000/51 A

– T2

30 VA, 5P20

C8003.000/5/5 A

– T4 0,3B 1,8

– F5

– R6

30 VA, cl. 0.2

30 VA, 3P

10500 / 110 / 110 V√ 3 / √ 3 / 3

– T8

– F8

Option: – F1– C5

– C6

10500 / 110 / 110 V√ 3 / √ 3 / 3 – R5

25 VA, cl. 0.2

50 VA, 3P

– R5

25 VA, cl. 0.2

50 VA, 3P

25 VA, cl. 0.2

50 VA, 3P

50 VA, cl. 0.2

50 VA, 3P

10500 / 110 / 110 V√ 3 / √ 3 / 3

– T6

– F6

Option: – C1

C = 250 nF

C = 250 nF

– R8

MMM

Up to 100 A with load-break switch

and fuse

Equipment for main path

• circuit breaker 3AH38 or 3AH37

• disconnector

• earthing switches

• current transformers

• potential transformers ( option: with fuses )

• surge capacitors + arresters

Equipment for aux. transformer feeder

• circuit breaker 3AH31

• disconnector

• earthing switches

• current transformers

Alternatively for transformer < 1000kVA:

• fused load breaker

• fuses 63 to 125A



HB1 - Horizontal Bus Generator Switchgear Inside view

Main path with disconnector, PTs, surge arresters

Main path with breaker, earthing switch, CTs



HB1 - Horizontal Bus Generator Switchgear Inside view

Potential transformers

Earthing switch

Current transformers

Main busbar

3AH38 breaker

Surge arrestors



HB1- Horizontal Bus Generator Switchgear Connection modes

Fully insulated busbar systems

( e.g. Preissinger, DURESCA )Cables

Adapter to Isolated Phase Busduct (IPB)

Encapsulated Phase Busduct (EPB)



HB1 - Horizontal Bus Generator Switchgear Modular switchgear concept

Connection with fully insulated busbar systems

Option: air conditioning Control cubilcle

Connection to fully insulated busbar




Connection with cables

Option: air conditioningControl cubicleCable connection

compartment




Option: air conditioning

Control cubicleAdapter to IPB

Connection to Isolated Phase Busduct (IPB)



HB1 - Horizontal Bus Generator SwitchgearReference: UPM Kymene, Rauma , Finland

Delivery of 1 unit of HB1 - Horizontal Bus Switchgear

Application:

91 MVA / 10.5 kV / 5000 A / 50 Hz

Advantages:

Compact design, fully equipped switchgear

Complete unit factory assembled and tested

3AH38 vacuum circuit breaker acc. IEEE C37.013

Close to generator

Fast erection and commissioning



HB1 - Horizontal Bus Generator Switchgear Outdoor version: Indralaya, Indonesia

Example of application:59 MVA / 12.65 kV / 3300 A / 50 HzIndralaya Power Plant

Advantages:• Close to generator • Compact design• Complete unit factory assembled and tested • Fast erection and commissioning• Outdoor enclosure



HB1- Horizontal Bus Generator Switchgear Special solution for 130MVA grid coupler



HB1- Horizontal Bus Generator Switchgear Special solution for 130MVA grid coupler

Main data:

12kV ( Ud = 42kV, Up = 75kV )

Permissible current 7000A with A/C

63kA,1s for main path

100kA, 1s for aux.-transformer

160kAp

Dimensions:

12000 x 1900 x 2500mm ( W x D x H )

aux.-transformer feeder:2000 x 1650 x 2500mm



HIGS - Highly Integrated Generator SwitchgearMain data

Enclosure:• IP54 for indoor and outdoor ( with sun roof )

• directly installed at the generator terminal

• connection of main transformer and aux.-transformer either from top or bottom

• cables or busbars

Ratings:15kV, 60Hz ( 95kV BIL / 38kV PFWV )12kV, 50Hz ( 75kV BIL / 28kV PFWV )

Current capability:60Hz: 40kA/3s, 100kAp, 2000A - 3200A 50Hz: 50kA/3s, 125kAp, 2500A – 3700A 4000A @ IP42 in preparation

Dimensions3430 x 1200 x 2500mm ( W x D x H )



HIGS - Highly Integrated Generator SwitchgearSingle line drawing

Example of equipment

Can be modified according to client‘s demand:

• integrated neutral side treatment

• integrated aux.-transformer feeder with circuit breaker or fused load breaker



HIGS - Highly Integrated Generator SwitchgearFront view

Control panel GCB-panel Main transf. Aux. transf.



HIGS - Highly Integrated Generator SwitchgearInstallation

Generator

Gas-turbine

HIGS

Top view of a skid with gas turbine, generator and HIGS.

Interconnection generator - HIGS



HIGS - Highly Integrated Generator SwitchgearGenerator connection terminal

Terminal neutral side

Terminal line side



HIGS - Highly Integrated Generator Switchgear Reference: Combined heat and power plant Rya, Sweden

Delivery of 3 units of HIGS

Application:

3 x Siemens SGT800 Gas turbine 62MVA ( 50MW ) @ 11 KV each

Advantages:

Integral part of generator set -> “terminal connection box”

Complete unit factory assembled and tested

Fast erection and commissioning



HB3 - Horizontal Bus Generator Switchgear Phase segregated design

Ratings:17.5kV ( 110kV BIL / 50kV PFWV )


permissible current : 10000A with natural cooling

Dimensions4040 x 2900 x 2400 mm ( W x D x H )

Enclosure:• phase segregated enclosures for indoor and outdoor

• one 3AH37 vacuum circuit breaker per phase

• connection by isolated phase busducts ( IPB )

• integrated aux.-transformer feeder with fused load breaker up to 125A

Phase segregated enclosure

Aux.-transformer feeder

Control cubicle



HB3 - Horizontal Bus Generator Switchgear Typical layout



HB3 - Horizontal Bus Generator Switchgear Details and inside view



4 units of generator switchgears HB317.5 kV50 kA6500 AEach unit equipped with an integrated auxiliary T-Off switchgear

Customer: Voith Siemens HydroCountry: Ethiopian Electric Power

CorporationProject: Gilgel Gibe IIDate: 2007

Phase-segregated generator switchgear fully equipped with generator circuit breaker, disconnector, earthing switches, current and voltage transformers, surge capacitors and surge arresters.

Auxiliary transformer integrated in the switchgear.

Requirements

SolutionPhase segregated switchgear type HB3 with Siemens Vacuum Generator Circuit Breaker type 3AH38 according to IEEE C37.013 standard and all other requested equipment.

Auxiliary T-Off switchgear integrated in the generator switchgear system, equipped with load-break switch and fuses.

BenefitsHighly reliable and most modern generator switchgearMaintenance free generator vacuum circuit breakerFast erection and commissioning, no SF6 handling at siteNo need for T-Off in isolated phase busbar

Scope of Supply

HB3 - Horizontal Bus Generator Switchgear Reference: Hydro power plant Gilgel Gibe II, Ethiopia



VB1 – Vertical Busbar Switchgear Versatile design, for customized and retrofit solutions

Enclosure:• indoor and outdoor application

• vertically and horizontally extendable

• connection by means of cables, insulated busbars, metal enclosed busbar ducts, isolated phase busbars (IPB)

Dimensions:• 1650 x 1650 x 3100mm ( W x D x H )• control cubicle integrated

Ratings:up to 17.5kV ( 95kV BIL / 95kV PFWV ) up to 72kA / 180kAp up to 6000A @ IP42 with forced ventilation



VB1 – Vertical Busbar Switchgear Inside view



Air-insulated, metal-enclosed generator circuit breaker switchgear

Factory assembled and routine tested switchgear, according to the following major standards:• IEC 61936-1 ( VDE 0101 ) Power installations exceeding 1kV a.c.

• IEC 62271-200 AC metal-enclosed switchgear and control gear for rated voltages 1kV - 52kV in dependence of: - enclosure IP3XD or higher - interlocking of switching devices - position indication of switching devices visible with all doors and covers closed - type tested for dielectric, temperature rise, short time and peak current

• IEEE C37.013-1997 ( for circuit breaker types 3AH37 and 3AH38 ) IEC 62271-100 ( for circuit breakers 3AH31 )

High Current and Generator SwitchgearStandards

Schutzvermerk / Copyright-VermerkSeptember 2011, N. Anger

Thank you for your attention


Documents

Generator Vacuum Circuit-Breakers and · PDF filePage 27 Generator Switchgear, September 2011 HB1- Horizontal Bus Generator Switchgear Special solution for 130MVA grid coupler Main