Generator Vacuum Circuit-Breakers and Switchgears
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1 Generator Vacuum Circuit-Breakers and Switchgears The green solution September 2011, N. Anger Schutzvermerk / Copyright-Vermerk Siemens AG 2009
2 Generator Vacuum Circuit-Breakers The environmental friendly and economic solution Constant dielectric Hermetically sealed vacuum interrupter keeps out all environmental effects No degradation of quenching medium Constant contact resistance In vacuum, contacts cannot oxidize The very small resistance is maintained throughout the contact life High total current switched Low contact erosion 10,000 switching operations at rated normal current Up to 50 times rated short-circuit breaking current Economic advantages Vacuum circuit-breakers are maintenance-free Easy disposal at the end of life-time Page 2 Generator Switchgear, September 2011
3 Product Portfolio High Current & Generator VCB 100 3AH3 Short circuit breaking current [ka] A 8000/12000A Gen 4000A Gen 6300A Gen 3150A/4000A 3AK 3AH38 3AH37 3AH37 single pole DTO IEEE Std. C Gen 4000A 7, , ,5 50 Rated voltage [kv] Page 3 Generator Switchgear, September 2011
4 3AH37/38 Vacuum Circuit-Breaker General Overview Main Data Up to 24 kv, 6300 A, 72kA Type-tested acc. to IEEE Std C For horizontal and vertical installation Switching in vacuum Secondary equipment can be easily changed 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 Page 4 Generator Switchgear, September 2011
5 3AH37/38 Vacuum Circuit-Breaker Product Features Features Your Benefit Column construction Vertical arrangement of the vacuum tubes Design allows free convection Solid insulation material is minimised as far as possible Page 5 Generator Switchgear, September 2011 High mechanical stability Compact dimensions No forced cooling required Low fire load
6 3AH37/38 Vacuum Circuit-Breaker Product Features Features Heat-exchanger can be mounted simply rotated through 90 Your Benefit Even with horizontal mounting free convection possible Page 6 Generator Switchgear, September 2011
7 3AH37/38 Vacuum Circuit-Breaker Details Hand crank coupling Indicator Closing spring charged Indicator Closed/Open Push button Closed Pushed button Open Counter for Operating cycles Page 7 Generator Switchgear, September 2011
8 3AH37/38 Vacuum Circuit-Breaker Details Operating unit Cooling element Auxiliary switch Double Post Insulator Gearbox Shunt release Closing solenoid Opening spring Closing spring Page 8 Generator Switchgear, September 2011
9 3AH37/38 Vacuum Circuit-Breaker Technical Datas 3AH37 3AH37 3AH38 Rated Voltage 17.5 kv 24 kv 17.5 kv Rated short-duration power-frequency withstand voltage 50 kv 60 kv 50 kv Rated lightning impulse withstand voltage 110 kv 125 kv 110 kv Rated frequency 50/60 Hz 50/60 Hz 50/60 Hz Rated short-circuit breaking current 50 ka / 63 ka / 72 ka 50 ka / 63 ka / 72 ka 50 ka / 63 ka / 72 ka Rated short-circuit making current 137 ka / 173 ka / 198 ka 137kA / 173kA / 198kA 137 ka / 173 ka / 198 ka Rated normal current 5000 A / 6300 A 3150 A / 4000A 5000 A / 6300A 3150 A / 4000 A Page 9 Generator Switchgear, September 2011
10 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) Page 10 Generator Switchgear, September 2011
11 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) Page 11 Generator Switchgear, September 2011
12 Switchgear type GMSG-GCB drawout Main Data Rated voltage:15 kv Continuous current: 1200A, 2000A, 3000A, 4000A Short-circuit current (3s): 40kA, 50kA, 63kA Page 12 Generator Switchgear, September 2011
13 Switchgear type NXAIR P drawout Main Data Rated voltage:17,5 kv Continuous current: 3150A, 4000A Short-circuit current (3s): 40kA Page 13 Generator Switchgear, September 2011
14 High Current and Generator Switchgear Product portfolio HB1 - Horizontal Bus Switchgear Indoor IP3X up to 10kV up to 17.5kV Outdoor IP54 up to 10kV up to 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 Indoor / Outdoor IP54 up to 10kV up to 15kV 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 HB3 - Horizontal Bus Switchgear, Phase Segregated VB1 - Vertical Bus Switchgear Extendable switchgear, for customized and retrofit solutions Indoor and outdoor up to kv up to ,5 kv connection by isolated phase busduct systems ( IPB ) optional: auxiliary transformer feeder Page 14 Generator Switchgear, September 2011 Indoor and outdoor up to kv up to ,5 kv Connection mode cables insulated busbars metal enclosed busducts isolated phase busduct system ( IPB )
15 HB1 - Horizontal Bus Generator Switchgear Non-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 ) IP2X IP3X 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 Page 15 Generator Switchgear, September 2011
16 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 ) Isc: 50kA / 63kA / 72kA Isc peak: 125kA / 160kA / 180kA permissible current ( at 40 C ) IP54 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 Page 16 Generator Switchgear, September 2011
17 HB1 - Horizontal Bus Generator Switchgear Typical single line diagram Uc =14.4 kv Isn = 10 ka IEC Class 4 F2 T2 R6 U a = 110 V DC Option: -W10 U a = 110 V DC / 110 / 110 V 3 / 3 / 3 R5 T /51 A 3.000/5/5 A T / 110 / 110 V 3 / 3 / 3 30 VA, cl VA, 3P M M T /5/5/5 A G Main Transformer 117 (+ 2x1,25%)/10,5kV 98 MVA Q9 Temporarily mounted short circuit bridge Q0 30 VA, 5P20 30 VA, 5P20 30 VA, 5P20 T4 0,3B 1,8 F8 R8 T / 110 / 110 V 3 / 3 / 3 50 VA, cl. 0.2 F6 50 VA, 3P C5 Option: F1 25 VA, cl VA, 3P F5 C800 M -Q82 Siemens breaker 3AH3 M -Q81 C6 30 VA, cl VA, 5P20 30 VA, 5P20 C = 200 nf Ua = 110 V DC I k I p Option: C1 U a = 110 V DC I k I p C2 C = 250 nf = 50 ka, 1s = 137 ka C = 250 nf = 50 ka, 1s = 137 ka Option: Aux. T-OFF SWG Ua = 480 V AC, 3-ph M T /1/1 A Main current path: Un = 13.8 kv In = A Isc = 50 ka Ik = 50 ka, 3s Ip = 137 ka Page 17 Generator Switchgear, September 2011 M Ua = 480 V AC, 3-ph -Q91 -Q01 Ik = 50 ka In = ka Manual earthing 30 VA, 5P20 30 VA, 5P20 Option: Excitation T-OFF SWG Ua = 480 V AC, 3-ph T21 100/1/1 A M -Q87 -F87 Auxiliary transformer Un = 17,5 kv Ik = 25 ka, 1s Ip = 63 ka Manual earthing 30 VA, 5P20 30 VA, 5P20 M Excitation transformer 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
18 HB1 - Horizontal Bus Generator Switchgear Inside view Main path with disconnector, PTs, surge arresters Page 18 Generator Switchgear, September 2011 Main path with breaker, earthing switch, CTs
19 HB1 - Horizontal Bus Generator Switchgear Inside view Potential transformers Earthing switch Current transformers Main busbar 3AH38 breaker Surge arrestors Page 19 Generator Switchgear, September 2011
20 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) Page 20 Generator Switchgear, September 2011
21 HB1 - Horizontal Bus Generator Switchgear Modular switchgear concept Connection with fully insulated busbar systems Connection to fully insulated busbar Control cubilcle Option: air conditioning Page 21 Generator Switchgear, September 2011
22 HB1 - Horizontal Bus Generator Switchgear Modular switchgear concept Connection with cables Cable connection compartment Control cubicle Option: air conditioning Page 22 Generator Switchgear, September 2011
23 HB1 - Horizontal Bus Generator Switchgear Modular switchgear concept Connection to Isolated Phase Busduct (IPB) Adapter to IPB Page 23 Control cubicle Generator Switchgear, September 2011 Option: air conditioning
24 HB1 - Horizontal Bus Generator Switchgear Reference: 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 C Close to generator Fast erection and commissioning Page 24 Generator Switchgear, September 2011
25 HB1 - Horizontal Bus Generator Switchgear Outdoor version: Indralaya, Indonesia Example of application: 59 MVA / kv / 3300 A / 50 Hz Indralaya Power Plant Advantages: Close to generator Compact design Complete unit factory assembled and tested Fast erection and commissioning Outdoor enclosure Page 25 Generator Switchgear, September 2011
26 HB1- Horizontal Bus Generator Switchgear Special solution for 130MVA grid coupler Page 26 Generator Switchgear, September 2011
27 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: x 1900 x 2500mm ( W x D x H ) aux.-transformer feeder: 2000 x 1650 x 2500mm Page 27 Generator Switchgear, September 2011
28 HIGS - Highly Integrated Generator Switchgear Main 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 A 50Hz: 50kA/3s, 125kAp, 2500A 3700A IP42 in preparation Dimensions 3430 x 1200 x 2500mm ( W x D x H ) Page 28 Generator Switchgear, September 2011
29 HIGS - Highly Integrated Generator Switchgear Single 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 Page 29 Generator Switchgear, September 2011
30 HIGS - Highly Integrated Generator Switchgear Front view Control panel GCB-panel Main transf. Aux. transf. Page 30 Generator Switchgear, September 2011
31 HIGS - Highly Integrated Generator Switchgear Installation Top view of a skid with gas turbine, generator and HIGS. Generator Interconnection generator - HIGS Gas-turbine HIGS Page 31 Generator Switchgear, September 2011
32 HIGS - Highly Integrated Generator Switchgear Generator connection terminal Terminal neutral side Terminal line side Page 32 Generator Switchgear, September 2011
33 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 Page 33 Generator Switchgear, September 2011
34 HB3 - Horizontal Bus Generator Switchgear Phase segregated design Phase segregated enclosure Aux.-transformer feeder Control cubicle Enclosure: phase segregated enclosures for indoor and outdoor one 3AH37 vacuum circuit breaker per phase Ratings: 17.5kV ( 110kV BIL / 50kV PFWV ) Isc: 50kA / 63kA / 72kA Isc peak: 125kA / 160kA / 180kA connection by isolated phase busducts ( IPB ) permissible current : 10000A with natural cooling integrated aux.-transformer feeder with Dimensions fused load breaker up to 125A 4040 x 2900 x 2400 mm ( W x D x H ) Page 34 Generator Switchgear, September 2011
35 HB3 - Horizontal Bus Generator Switchgear Typical layout Page 35 Generator Switchgear, September 2011
36 HB3 - Horizontal Bus Generator Switchgear Details and inside view Page 36 Generator Switchgear, September 2011
37 HB3 - Horizontal Bus Generator Switchgear Reference: Hydro power plant Gilgel Gibe II, Ethiopia Customer: Voith Siemens Hydro Country: Ethiopian Electric Power Corporation Project: Gilgel Gibe II Date: 2007 Requirements 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. Scope of Supply 4 units of generator switchgears HB kv 50 ka 6500 A Each unit equipped with an integrated auxiliary T-Off switchgear Solution Phase segregated switchgear type HB3 with Siemens Vacuum Generator Circuit Breaker type 3AH38 according to IEEE C standard and all other requested equipment. Auxiliary T-Off switchgear integrated in the generator switchgear system, equipped with load-break switch and fuses. Benefits Highly reliable and most modern generator switchgear Maintenance free generator vacuum circuit breaker Fast erection and commissioning, no SF 6 handling at site No need for T-Off in isolated phase busbar Page 37 Generator Switchgear, September 2011
38 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) Page 38 Generator Switchgear, September 2011 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 IP42 with forced ventilation
39 VB1 Vertical Busbar Switchgear Inside view Page 39 Generator Switchgear, September 2011
40 High Current and Generator Switchgear Standards Air-insulated, metal-enclosed generator circuit breaker switchgear Factory assembled and routine tested switchgear, according to the following major standards: IEC ( VDE 0101 ) Power installations exceeding 1kV a.c. IEC 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 C ( for circuit breaker types 3AH37 and 3AH38 ) IEC ( for circuit breakers 3AH31 ) Page 40 Generator Switchgear, September 2011
41 Thank you for your attention September 2011, N. Anger Schutzvermerk / Copyright-Vermerk Siemens AG 2009
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