nxplus c single busbar - siemens energy sector · busbar design 1600 a, 2000 a, 2500 a connecting...

NXPLUS C Single busbarMaintenance-free for lifetime

Copyright © Siemens AG 2010. All rights reserved

Energy Distribution

Welcome!


Content

Overview

Technical data

Typicals

Panel design

Circuit-Breaker panel

Busbar

Operation

Metering

Low-voltage compartment

Cable connection

Interlocks

Classification according IEC 62 271-200

Customer benefit


Technical features

Up to 15 kV, 31.5 kA, 2500 A busbar, 2500 A feeder

Up to 24 kV, 25 kA, 2500 A busbar, 2000 A feeder

Metal-enclosed

Single-busbar

Gas-insulated

Hermetically enclosed

Factory-assembled, type-tested switchgear according IEC 62 271-200


Customer benefit

Environmental independence

Compactness

Maintenance-free design

Personal safety

Security of operation, reliability

Economy, ecology


General information

Market introduction in April 1994

Successful operation in approx. 80 countries until today

The gas-insulated circuit-breaker switchgear for application in nearly all branches like

Airports and ports Automotive Buildings Cement industries Chemicals and pharma Contractors Food and beverage General industries Mining Offshore industries Oil and gas Paper industries Semiconductor Steel & aluminium industries Utilities Transportation & Railways Windfarms

More than 35,600 panels NXPLUS C (September 2008) delivered

Our experiences are based on more than 93,100 delivered gas-insulated circuit-breaker switchgear (primary distribution level)


Technical data

2250 2550

1225

1100

600900

IP3XD

IP65

2000

2500

25

25

63

63

125

50

50/60

24

2250 2550

1225

1100

600900

IP3XD

IP65

2000

2500

25

25

63

63

95

38

50/60

17.5

2250 2550

1225

1100

600900

IP3XD

IP65

2500

2500

31.5

31.5

80

80

95

36

50/60

15

2250 2550

1225

1100

600900

IP3XD

IP65

2500

2500

31.5

31.5

80

80

75 *

28 *

50/60

12

2250 2550

mmHeight 600 mm panels Height 900 mm 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


Overview of typicals: circuit-breaker panel

630 A 1000 A, 1250 A 2000 A, 2500 A


Overview of typicals: bus sectionaliser

1000 A, 1250 A Disconnector in front of

circuit-breaker

1000 A, 1250 A Disconnector in front of

and behind circuitbreaker

2000 A, 2500A Disconnector in front of

and behind circuit-breaker


Overview of typicals: ring-main panel, switch-disconnector panel

Ring-main panel Switch-disconnector panel


Overview of typicals: contactor panel, metering panel

Contactor panel Metering panel


Overview of typicals: disconnector panel

1000 A, 1250 A 2000 A, 2500 A


Circuit-breaker panel 1000 A, 1250 A


Operating mechanism for three-position switch

Circuit-breaker operating mechanism

Cable connection from front (optionally from rear)

Voltage transformer

Busbar

Hermetically welded stainless-steel vessel

Three-position switch

Pressure-relief(optionally with duct)

Circuit breaker with vacuum interrupter

Current transformer

Voltage transformer


Circuit-breaker panel 2000 A, 2500 A


Operating mechanism for three-position switch

Circuit-breaker operating mechanism

Cable connection from front

Voltage transformer

Busbar

Hermetically welded stainless-steel vessel

Three-position switchPressure-relief duct

Circuit breaker with vacuum interrupter

Current transformer

Pressure-relief

Voltage transformer


Busbar

Silicone-rubber insulated, screened, resistant to ageing and UV, safe-to-touch due to metal enclosure

Insensitive to pollution and condensation

No gas work at site, i.e. fast extension or replacement

Fast availability


Silicone-rubber insulation

Very good insulating capacity: >20 kV/mm

Temperature-resistant: -50°C up to +180°C

Resistant against ozone, UV-radiation and humidity

No conductive residues after discharges

Flame retardant, no toxic combustion products

Proven for decades as sealing end and HV insulator


Busbar insulation made of silicone-rubber with earthing layer

Earth connection

Cross adapter

Bushing

Cover

Clamps

Busbar (round copper)

End adapter

Switchgear vessel

Busbar design 1250 A


Cover

Clamps


End adapter

Switchgear vessel

End adapter


Clamps

Busbar insulation made of silicone- rubber with earthing layer

Earth connection

Earth connection

Cross adapter

Bushing

Busbar design 1600 A, 2000 A, 2500 A

Connecting bolt


Under water test of silicone-rubber insulated busbar

Rated voltage Ur 24 kV

Partial discharge (PD) test before and after high-voltage test

High voltage test 30 kV for 24 hours

Water pressure 100 hPa gauge pressure (equal to 1 m depth of immersion)

No disruptive discharge occurred

PD tests were passed successfully, no difference in PD rate before and after the high-voltage test


Operation of three-position switch (600 mm panel)

Operating shaft for earthing switch

Operating shaftfor disconnector

Control gate

Switch position indicatorfor earthing switch

Switch position indicatorfor disconnector

Circuit-breakerinterrogation lever

Ready-for-service indicator


Operation of three-position switch (900 mm panel)

Operating shaft for earthing switch

Operating shaftfor disconnector

Control gate



Circuit-breakerinterrogation lever



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


Current measurement

1 Busbar current transformer2 Feeder c.t. at the panel connection3 Cable-type current transformer4 Core-balance current transformer

Ring-core currenttransformers

Main circuit as primary part without dielectric and thermal problems

Secondary part accessible outside the enclosure without danger

Free of dielectrically stressed cast-resin parts


Voltage measurement

Voltage transformer

Single-pole insulated

Metal-coated

Plug-in type

At the panel connection: Integrated disconnecting facility

At the busbar: Surge-proof for 80% UP repeat test with connected transformer



Height: 761 mm

1161 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 controller

Customer-specific equipment (protection, control, metering, annunciation)

Wiring in H07VK, optionally also heat-resistant and halogen-free


Panel connection – outside cone according to IEC 50 181

Maintenance-free due to welded bushings

Cable testing without removing the cables

Current transformers mounted on bushings (also for double or triple cables)

1 to 6 cables possible per phase


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



Possible cable connection per bushing Special connections


Feeder earthing with the circuit-breaker

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

Ready to earth

Electrical OFF-signals are suppressed

2) Close the circuit-breaker

Feeder earthed

3) Padlock the “feeder earthed”interlock

The circuit-breaker is blocked mechanically

Signalling contact: Feeder earthed (option)

1)

2) 3)


Cable testing without removing the cables

Measuring bolt

Insulating cap

Cable test with DC voltage or AC voltage 0.1 Hz

Maximum test voltage for Ur 12 kV: = 48 kV ~ 19 kV for Ur 24 kV: = 70 kV ~ 38 kV

Three-position switch and circuit- breaker in OPEN position

Cable fault location with lightning impulse voltage

Full operating voltage at the busbar

Disconnector for voltage transformer at feeder


Interlocks (selection)

Standard interlocks

Electromagnetic interlock between three-position disconnector of system A and system B (via motor-drive)

Electromagnetic interlock between three-position disconnector of system A and system B and circuit- breaker

Three-position disconnector of system A and system B by S1-keylock

Additional interlocks

Electromagnetic interlock at the three-position disconnector of system A and system B

S1-keylock at circuit-breaker

Release of cable compartment cover and the circuit-breaker locking device only with “feeder earthed”

Interlocks are designed according to IEC 62 271-200


Classification according to IEC 62 271-200

Partition class: PMLoss of service continuity category: Panels without HV HRC fuses: LSC 2B Panels with HV HRC fuses: LSC 2A

Accessibility of compartments: Busbar compartment: tool-based Switching device compartment: non accessible Low-voltage compartment: tool-based Cable conn. comp. without HV HRC fuses: tool-based Cable 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 kV Free-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


Features


Compactness


Personal safety

Security of Operation, reliability

Economy, ecology



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


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



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


Personal safety

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


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 (3,100 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


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


Thanks for your attention.

NXPLUS C, the gas-insulated switchgear up to15 kV, 31.5 kA, 2500 A busbar, 2500 A feeders24 kV, 25 kA, 2500 A busbar, 2000 A feeders

nxplus c single busbar - siemens energy sector · busbar design 1600 a, 2000 a, 2500 a connecting...

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