NXPLUS C Single Busbar - · PDF filePage 2 October 1st 2011 NXPLUS C Infrastructure & Cities / IC ... The gas-insulated circuit-breaker switchgear for application in ... Busbar Design

NXPLUS CSingle BusbarMaintenance-free for lifetime

Page 2 October 1st 2011 Infrastructure & Cities / IC LMV MV 2NXPLUS C

© Siemens AG 2008

Energy Distribution

Welcome!


© Siemens AG 2008

Content

OverviewTechnical DataRoom HeightHorizontal Pressure Relief DuctTypicalsPanel Design

• Circuit-Breaker Panel• Busbar• Operation• Metering• Low-voltage Compartment• Cable Connection• Interlocks

Special FeaturesClassification according IEC 62 271-200Customer Benefit


© Siemens AG 2008

Technical Features

Up to 15 kV, 31.5 kA, 2500 A busbar,2500 A feederUp to 24 kV, 25 kA, 2500 A busbar,2000 A feederMetal-enclosedSingle-busbarGas-insulatedHermetically enclosedFactory-assembled, type-tested switchgear according IEC 62 271-200


© Siemens AG 2008

Customer Benefit

Environmental IndependenceCompactnessMaintenance-free DesignPersonal SafetySecurity of Operation, ReliabilityEconomy, Ecology


© Siemens AG 2008

General Information

Market introduction in April 1994Successful operation in 90 countries until todayThe gas-insulated circuit-breaker switchgear for application in nearly all branches like Airports & Ports Automotive BuildingsCement Industries Chemicals & Pharma ContractorsFood & Beverage General Industries MiningOffshore Industries Oil & Gas Paper IndustriesSemiconductor Steel & Aluminium Industries Utilities Transportation & Railways Water WindfarmsMore than 53,350 panels NXPLUS C (October 2011) deliveredOur experiences are based on more than 130,000 delivered gas-insulated circuit-breaker switchgear (primary distribution level)


© Siemens AG 2008

Technical Data

22502550

1225

1100

600900

IP3XD

IP65

2000

2500

25

25

63

63

125

50

50/60

24

22502550

1225

1100

600900

IP3XD

IP65

2000

2500

25

25

63

63

95

38

50/60

17.5

22502550

1225

1100

600900

IP3XD

IP65

2500

2500

31.5

31.5

80

80

95

36

50/60

15

22502550

1225

1100

600900

IP3XD

IP65

2500

2500

31.5

31.5

80

80

75 *

28 *

50/60

12

22502550

mmHeight 600mm panelsHeight 900mm panels (with hood)

1225mmDepth with rear duct

1100mmDepth without rear duct

600900

mmWidth **Dimensions

IP3XDSecondary part

IP65Degree of protection Primary part

2500ARated normal current of feeder

2500ARated normal current of busbar

31.5kARated short-circuit breaking current

31.5kARated short-time withstand current, 3 s

80kARated short-circuit making current

80kARated peak withstand current

60kVRated lightning impulse withstand voltage

20kVRated short-duration power-frequency withstand voltage

50/60HzRated frequency

7.2kVRated voltage

* 42 kV / 95 kV according to some national standards, ** at 2000 A / 2500 A rated normal current: 900 mm


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Room Height

Room height ≥ 2750 mmall technical data,all types of arrangement

Room height ≥ 2400 mm25 kA, 1 s and 3 s,wall- and free-standing arrangement,with rear pressure relief duct,busbar 1250 A,LV compartment 761 mm


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Overview of Typicals: Circuit-Breaker Panel

630 A 1000 A, 1250 A 1000 A, 1250 A(30,000 operating cycles)


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Overview of Typicals: Circuit-Breaker Panel

2000 A, 2500 A


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Overview of Typicals: Bus Sectionalizer

1000 A, 1250 ADisconnector in front of

circuit-breaker

1000 A, 1250 A Disconnector in front of

and behind circuit-breaker

2000 A, 2500ADisconnector in front of

and behind circuit-breaker


© Siemens AG 2008

Overview of Typicals: Ring-Main Panel, Switch-Disconnector Panel

Ring-main Panel Switch-disconnector Panel


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Overview of Typicals: Contactor Panel, Metering Panel

Contactor Panel Metering Panel


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Overview of Typicals: Disconnector Panel

1000 A, 1250 A 2000 A, 2500 A


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Circuit-Breaker Panel 1250 A

Low-voltage compartment

Operating mechanism for three-position switch

Circuit-breaker operating mechanism

Cable connection from front(optionally from rear)

Voltage transformer

Busbar

Hermetically weldedstainless-steel vessel

Three-position switch

Pressure-relief(optionally with duct)

Circuit breaker with vacuum interrupter

Current transformer

Voltage transformer


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Switch-Disconnector Panel

Voltage transformer

Busbar


Three-position switch-disconnector



Operating mechanism for three-position switch-disconnector

Fuse chamber

Cable connection from front


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Vacuum-Contactor Panel

Voltage transformer

Busbar


Three-position switch


Contactor with vacuum interrupter

Current transformer


Operating mechanism for three-position switch

Contactor operating mechanism

Fuse chamber

Cable connection from front


© Siemens AG 2008

Busbar

Silicone-Rubber insulated, screened, resistant to ageing and UV, safe-to-touch due to metal enclosureInsensitive to pollution and condensationNo gas work at site, i. e. fast extension or replacementFast availabilityDegree of protection IP65


© Siemens AG 2008

Silicone-Rubber Insulation

Very good insulating capacity: >20 kV/mmTemperature-resistant: -50°C up to +180°CResistant against ozone, UV-radiation and humidityNo conductive residues after dischargesFlame retardant, no toxic combustion productsProven for decades as sealing end and HV insulator


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Busbar insulationmade of silicone-rubberwith earthing layer

Earth connection

Cross adapter

Bushing

Cover

Clamps

Busbar(round copper)

End adapter

Switchgear vessel

Busbar Design 1250 A


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Cover

Clamps


End adapter

Switchgearvessel

End adapter


Clamps

Busbar insulationmade of silicone-rubberwith earthing layer

Earth connection

Earth connection

Cross adapter

Bushing

Busbar Design 1600 A, 2000 A, 2500 A

Connecting bolt


© Siemens AG 2008

Under Water Test of Silicone-Rubber Insulated Busbar

Rated voltage Ur 24 kVPartial discharge (PD) test before and after high-voltage testHigh voltage test 30 kV for 24 hoursWater pressure 100 hPa gauge pressure (equal to 1 m depth of immersion)No disruptive discharge occurredPD tests were passed successfully, no difference in PD rate before and after the high-voltage test


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Operation of Three-Position Switch (600mm panel)

Operating shaftfor earthing switch

Operating shaftfor disconnector

Control gate

Switch position indicatorfor earthing switch

Switch position indicatorfor disconnector

Circuit-breakerinterrogation lever

Ready-for-service indicator


© Siemens AG 2008

Operation of Three-Position Switch (900mm panel)

Operating shaftfor earthing switch

Operating shaftfor disconnector

Control gate



Circuit-breakerinterrogation lever



© Siemens AG 2008

NXPLUS C Operation


Control gate

Actuating opening fordisconnector / earthing switch

Opening for charging thecircuit-breaker spring by hand

Capacitive voltage detection system for the busbar (optional)

“Spring charged” indicator

Counter

ON pushbuttonfor circuit-breaker



Circuit-breaker interrogation lever

Switch position indicator for circuit-breaker

OFF pushbuttonfor circuit-breaker

“De-earthing” interlock

Capacitive voltage detection system for feeder


© Siemens AG 2008

Current Measurement

Ring-core current transformersMain circuit as primary part without dielectric and thermal problems Secondary part accessible outside the enclosure without dangerFree of dielectrically stressed cast-resin parts

1 Busbar current transformer

2 Feeder c.t. at the panel connection

3 Cable-type current transformer

4 Zero-sequence current transformer


© Siemens AG 2008

Voltage Measurement

Voltage transformerSingle-pole insulatedMetal-coatedPlug-in typeAt the panel connection: Integrated disconnecting facilityAt the busbar:Surge-proof for 80 % Udrepeat test with connected transformer


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Low-Voltage Compartment

Height: 761 mm1161 mm (option)

Removable, bus wires and control cables plugged in (via 6 or 10-pole coded module plug connectors)Panel control via conventional control devices or digital bay controllerCustomer-specific equipment (protection, control, metering, annunciation)Wiring in H07VK, optionally also heat-resistant and halogen-free


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Panel Connection – Outside Cone according to EN 50 181

Maintenance-free due to welded bushingsCable testing without removing the cablesCurrent transformers mounted on bushings (also for double or triple cables)1 to 8 cables possible per phase


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Fully Insulated Panel Connections

600 mm panel

900 mm panel

Surge arrester or limiter

Fully insulated bar

Elbow plugs or T-plugs with bolted contact

T-plugs or coupling plugs with bolted contact

T-plugs or coupling plugs with bolted contact

Possible cable connection per bushing Special connections


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Feeder Earthing with the Circuit-Breaker

1) Close the “earthing switch” of the three-position switch

Ready to earthElectrical OFF-signals are suppressed

2) Close the circuit-breakerFeeder earthed

3) Padlock the “feeder earthed” interlockThe circuit-breaker is blocked mechanicallySignalling contact: Feeder earthed (option)

1)

2) 3)


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Cable Testing without Removing the Cables

Measuring bolt Insulating cap

Cable test with DC voltage or AC voltage 0.1 HzMaximum test voltagefor Ur 12 kV: = 48 kV ~ 19 kVfor Ur 24 kV: = 70 kV ~ 38 kVThree-position switch and circuit-breaker in OPEN positionCable fault location with lightning impulse voltageFull operating voltage at the busbarDisconnector for voltage transformer at feeder


© Siemens AG 2008

Interlocks (Selection)

Interlocks are designed according to IEC 62 271-200

Standard interlocksThree-position disconnector against circuit-breaker – mechanicalDisconnector against earthing switch (within three-position disconnector) – mechanical Locking device at the circuit-breakerLocking device at the three-position disconnector

Additional interlocksElectromagnetic interlock at the three-position disconnectorElectromagnetic interlock at the earthing switch (of three-position switch)Release of cable compartment cover and the circuit-breaker locking device only with “feeder earthed”


© Siemens AG 2008

Special Features (1)

Vacuum contactor panel

Up to 15 kV, 31.5 kA 3 s, 450 Aup to 24 kV, 25 kA 3 s, 450 A

For very high switching rates (100,000 or 500,000 operating cycles)

Short-circuit protection via HV HRC fuse

Application in hermetically welded switchgear vessel in conformity with the system

Cable connection, with surge limiter if required


© Siemens AG 2008

Special Features (3)

No bolted seals“sealed for life”

Welded-in current bushings

Welded-in metal bellows

Welded-in pressure relief device

Welded-in rotary bushings

Minimum gas losses

Minimum vapor diffusion into the switchgear vessel

Stable dew-point behavior throughout the entire service life

No corrosion inside the switchgear vessel


© Siemens AG 2008

Classification according to IEC 62 271-200

Partition Class: PM

Loss of Service Continuity Category:Panels without HV HRC fuses: LSC 2Panels with HV HRC fuses: LSC 2

Accessibility of Compartments:Busbar compartment: tool-basedSwitching device compartment: non accessibleLow-voltage compartment: tool-basedCable conn. comp. without HV HRC fuses: tool-basedCable conn. comp. with HV HRC fuses: interlock-controlled

and tool-based

Internal arc classification: 7.2 kV; 12 kV; 15 kV 17.5 kV; 24 kVFree-standing arrangement: IAC A FLR 31.5 kA 1 s IAC A FLR 25 kA 1 sWall-standing arrangement: IAC A FL 31.5 kA 1 s IAC A FL 25 kA 1 s


© Siemens AG 2008

Features

Environmental IndependenceCompactnessMaintenance-free DesignPersonal SafetySecurity of Operation, ReliabilityEconomy, Ecology


© Siemens AG 2008

Environmental Independence

Our solutionHermetically tight welded,no diffusing humidityStainless-steel vessel,long-time corrosion-resistantLaser-cut, laser-welded materials,exactly fitting qualityWelded stainless-steel metal bellows,welded rotary-bushings,for transmission of operating powerSystem-conforming, shock-proof connection systemsNon-contact and non-sealed transmission of capacitive voltage detection systemIntegral, highly sensitive leakage detection system in the factory,gas-tight for lifetime

Your benefitInsensitive to aggressive environments (salt water, tropical areas, dust, humidity, chemical pollutants),no oxidation of contacts and bolted joints, no condensation,no pollution layers on insulators, no resinifying greaseContinuous insulation qualityNo ingress of foreign bodies, small animalsIndependent of site altitude


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Compactness

Our solutionSF6-insulation,compact constructionCombined disconnector and earthing switch,compact switch designUser-friendly cable connection heightSIPROTEC bay controller: Digital control, interlocking and protection system,compact secondary systems with high functional density

Your benefitMinimum space requirements, building volume saved: Up to 38 % at 12 kV, 43 % at 24 kV, efficient use of existing rooms, reduced volume for new constructions, compact design reduces transport and installation costs to a minimumNo cable basement requiredEconomic use of space in urban areas,installation in conurbation, load centres to minimise transmission losses


© Siemens AG 2008

Maintenance-Free Design

Our solutionHermetically welded stainless-steel enclosure,stable, defined environmental conditions within the vesselMaintenance-free switching devices and operating mechanisms,no adjustment and lubricationInsulated busbar,screened, independent of the environmentEnclosed cable plugs,screened, independent of the environment

Your benefitNo gas work during installation or extensions,no repeated SF6-training required for personnelMaximum reliability of supply and availability,no shutdowns for maintenanceSealed for lifetime(according IEC 62 271-200)No maintenance costs,minimized operational costsHighly economic investment


© Siemens AG 2008

Personal Safety

Our solutionHermetically welded enclosureInternal arc classified according to IEC 62 271-200 for 1 sLogical mechanical interlocksCapacitive voltage detection systemMake-proof earthing throughthe circuit-breaker

Your benefitTouching of live parts excluded,extremely high degree of protection of the primary partAccidental opening of vessel excludedAccess to switching devices not required due to maintenance-free designMaloperation excludedVerification of safe isolation from supply without opening the enclosure


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Security of Operation, Reliability

Your benefitIndependent of the environment, maintenance-free,no condensation, no oxidationNo dielectric and dynamic stress for current transformersFast transformer replacement possibleEasy installation and extension without gas work,short shutdown time for extensions or panel replacementEasy and fast panel replacementReduced fire loadMTBF (>3,500 years at the moment)

Our solutionHermetically welded enclosure, welded stainless-steel metal bellows,welded rotary-bushingsCurrent transformers outside the vesselMetal-enclosed voltage transformers plugged in from outsidePlug-in busbarModular designMinimum use of insulating materialType and routine tests, quality managementNC production processes


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Economy, Ecology

Our solutionMaintenance-free switchgearCompact constructionEconomic productionSF6 only used in hermetically sealed pressure system100 % SF6-recycling by means of special toolsIdentified, recyclable insulating materialListing of all materials used

Your benefitMinimized operator expenses, high availabilityReduced transport costsMinimum requirements regarding the buildingMinimized transmission losses by installation in load centresReliable, calculable disposal


© Siemens AG 2008

MTBF

The term major failures and minor failures are taken from the CIGRE publication of the work group 13.06 “Reliability of High Voltage Switchgears”.

Definition:MTBFMeantime between failureMajor failure (MF)Complete failure of a panel which causes the lack of one or more of its fundamentalfunctions.NOTE: A major failure will result in an immediate change in the system operating e.g. the backup protective equipment being required to remove the fault, or will result in mandatory removal from service for non scheduled maintenance (Intervention required within 30 minutes).Minor failure (mF)Failure of a panel other than a major failure or any failure, even complete, of a constructional element or a sub-assembly which does not cause a major failure of the panel.MTTFMeantime to failure


© Siemens AG 2008

Thanks for your attention.

NXPLUS C, the gas-insulated switchgear up to

15 kV, 31.5 kA, 2500 A busbar, 2500 A feeders24 kV, 25 kA, 2500 A busbar, 2000 A feeders

Documents

NXPLUS C Single Busbar - · PDF filePage 2 October 1st 2011 NXPLUS C Infrastructure & Cities / IC ... The gas-insulated circuit-breaker switchgear for application in ... Busbar Design