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NXPLUS C Single busbarMaintenance-free for lifetime
Page 2 Copyright © Siemens AG 2010. All rights reserved
Energy Distribution
Welcome!
Page 3 Copyright © Siemens AG 2010. All rights reserved
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
Page 4 Copyright © Siemens AG 2010. All rights reserved
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
Page 5 Copyright © Siemens AG 2010. All rights reserved
Customer benefit
Environmental independence
Compactness
Maintenance-free design
Personal safety
Security of operation, reliability
Economy, ecology
Page 6 Copyright © Siemens AG 2010. All rights reserved
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)
Page 7 Copyright © Siemens AG 2010. All rights reserved
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
Page 8 Copyright © Siemens AG 2010. All rights reserved
Overview of typicals: circuit-breaker panel
630 A 1000 A, 1250 A 2000 A, 2500 A
Page 9 Copyright © Siemens AG 2010. All rights reserved
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
Page 10 Copyright © Siemens AG 2010. All rights reserved
Overview of typicals: ring-main panel, switch-disconnector panel
Ring-main panel Switch-disconnector panel
Page 11 Copyright © Siemens AG 2010. All rights reserved
Overview of typicals: contactor panel, metering panel
Contactor panel Metering panel
Page 12 Copyright © Siemens AG 2010. All rights reserved
Overview of typicals: disconnector panel
1000 A, 1250 A 2000 A, 2500 A
Page 13 Copyright © Siemens AG 2010. All rights reserved
Circuit-breaker panel 1000 A, 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 welded stainless-steel vessel
Three-position switch
Pressure-relief(optionally with duct)
Circuit breaker with vacuum interrupter
Current transformer
Voltage transformer
Page 14 Copyright © Siemens AG 2010. All rights reserved
Circuit-breaker panel 2000 A, 2500 A
Low-voltage compartment
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
Page 15 Copyright © Siemens AG 2010. All rights reserved
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
Page 16 Copyright © Siemens AG 2010. All rights reserved
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
Page 17 Copyright © Siemens AG 2010. All rights reserved
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
Page 18 Copyright © Siemens AG 2010. All rights reserved
Cover
Clamps
Busbar (round copper)
End adapter
Switchgear vessel
End adapter
Busbar (round copper)
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
Page 19 Copyright © Siemens AG 2010. All rights reserved
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
Page 20 Copyright © Siemens AG 2010. All rights reserved
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
Page 21 Copyright © Siemens AG 2010. All rights reserved
Operation of three-position switch (900 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
Page 22 Copyright © Siemens AG 2010. All rights reserved
NXPLUS C operation
Ready-for-service indicator
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
Switch position indicatorfor disconnector
Switch position indicatorfor earthing switch
Circuit-breaker interrogation lever
Switch position indicator for circuit-breaker
OFF pushbuttonfor circuit-breaker
“De-earthing” interlock
Capacitive voltage detection system for feeder
Page 23 Copyright © Siemens AG 2010. All rights reserved
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
Page 24 Copyright © Siemens AG 2010. All rights reserved
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
Page 25 Copyright © Siemens AG 2010. All rights reserved
Low-voltage compartment
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
Page 26 Copyright © Siemens AG 2010. All rights reserved
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
Page 27 Copyright © Siemens AG 2010. All rights reserved
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
Elbow plugs or T-plugs with bolted contact
Elbow plugs or T-plugs with bolted contact
Possible cable connection per bushing Special connections
Page 28 Copyright © Siemens AG 2010. All rights reserved
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)
Page 29 Copyright © Siemens AG 2010. All rights reserved
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
Page 30 Copyright © Siemens AG 2010. All rights reserved
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
Page 31 Copyright © Siemens AG 2010. All rights reserved
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
Page 32 Copyright © Siemens AG 2010. All rights reserved
Features
Environmental independence
Compactness
Maintenance-free design
Personal safety
Security of Operation, reliability
Economy, ecology
Page 33 Copyright © Siemens AG 2010. All rights reserved
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
Page 34 Copyright © Siemens AG 2010. All rights reserved
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
Page 35 Copyright © Siemens AG 2010. All rights reserved
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
Page 36 Copyright © Siemens AG 2010. All rights reserved
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
Page 37 Copyright © Siemens AG 2010. All rights reserved
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
Page 38 Copyright © Siemens AG 2010. All rights reserved
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
Page 40 Copyright © Siemens AG 2010. All rights reserved
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