NXPLUS C Single busbar. Maintenance-free for lifetime

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Reynold Sherman
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1 NXPLUS C Single busbar Maintenance-free for lifetime

2 Energy Distribution Welcome! Page 2

3 Content Overview Technical data Typicals Panel design Circuit-Breaker panel Busbar Operation Metering Low-voltage compartment Cable connection Interlocks Classification according IEC Customer benefit Page 3

4 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 Page 4

5 Customer benefit Environmental independence Compactness Maintenance-free design Personal safety Security of operation, reliability Economy, ecology Page 5

6 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 6

7 Technical data Rated voltage kv Rated frequency Hz 50/60 50/60 50/60 50/60 50/60 Rated short-duration power-frequency withstand voltage kv * Rated lightning impulse withstand voltage kv * Rated peak withstand current ka Rated short-circuit making current ka Rated short-time withstand current, 3 s ka Rated short-circuit breaking current ka Rated normal current of busbar A Rated normal current of feeder A Degree of protection Primary part IP65 IP65 IP65 IP65 IP65 Secondary part IP3XD IP3XD IP3XD IP3XD IP3XD Dimensions Width ** mm Depth without rear duct mm Depth with rear duct mm Height 600 mm panels Height 900 mm panels (with hood) mm * 42 kv / 95 kv according to some national standards, ** at 2000 A / 2500 A rated normal current: 900 mm Page 7

8 Overview of typicals: circuit-breaker panel 630 A 1000 A, 1250 A 2000 A, 2500 A Page 8

9 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 9

10 Overview of typicals: ring-main panel, switch-disconnector panel Ring-main panel Switch-disconnector panel Page 10

11 Overview of typicals: contactor panel, metering panel Contactor panel Metering panel Page 11

12 Overview of typicals: disconnector panel 1000 A, 1250 A 2000 A, 2500 A Page 12

Circuit-breaker panel 1000 A, 1250 A Voltage transformer Low-voltage compartment Busbar Hermetically welded stainless-steel vessel Three-position switch Operating mechanism for three-position switch

13 Circuit-breaker panel 1000 A, 1250 A Voltage transformer Low-voltage compartment Busbar Hermetically welded stainless-steel vessel Three-position switch Operating mechanism for three-position switch Pressure-relief (optionally with duct) Circuit breaker with vacuum interrupter Current transformer Circuit-breaker operating mechanism Cable connection from front (optionally from rear) Voltage transformer Page 13

Circuit-breaker panel 2000 A, 2500 A Voltage transformer Busbar Hermetically welded stainless-steel vessel Three-position switch Pressure-relief duct Circuit breaker with vacuum interrupter

14 Circuit-breaker panel 2000 A, 2500 A Voltage transformer Busbar Hermetically welded stainless-steel vessel Three-position switch Pressure-relief duct Circuit breaker with vacuum interrupter Current transformer Pressure-relief Voltage transformer Low-voltage compartment Operating mechanism for three-position switch Circuit-breaker operating mechanism Cable connection from front Page 14

15 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 15

Silicone-rubber insulation Very good insulating capacity: >20 kv/mm Temperature-resistant: -50 C up to +180 C Resistant against ozone, UV-radiation and

16 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 16

17 Busbar design 1250 A Cover Clamps Busbar (round copper) Busbar insulation made of silicone-rubber with earthing layer Earth connection Cross adapter End adapter Switchgear vessel Bushing Page 17

18 Busbar design 1600 A, 2000 A, 2500 A Cover Clamps Busbar (round copper) End adapter Connecting bolt Clamps Busbar (round copper) Busbar insulation made of siliconerubber with earthing layer Earth connection Cross adapter Earth connection End adapter Switchgear vessel Bushing Page 18

Under water test of silicone-rubber insulated busbar Rated voltage U r 24 kv Partial discharge (PD) test before and after high-voltage test High voltage test 30 kv for 24 hours Water pressure

19 Under water test of silicone-rubber insulated busbar Rated voltage U r 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 19

20 Operation of three-position switch (600 mm panel) Switch position indicator for disconnector Ready-for-service indicator Switch position indicator for earthing switch Control gate Circuit-breaker interrogation lever Operating shaft for disconnector Operating shaft for earthing switch Page 20

Operation of three-position switch (900 mm panel) Control gate Circuit-breaker interrogation lever Switch position indicator for disconnector

21 Operation of three-position switch (900 mm panel) Control gate Circuit-breaker interrogation lever Switch position indicator for disconnector Operating shaft for disconnector Switch position indicator for earthing switch Ready-for-service indicator Operating shaft for earthing switch Page 21

NXPLUS C operation Ready-for-service indicator Control gate Actuating opening for disconnector/earthing switch Opening for charging the circuit-breaker spring by hand Capacitive voltage detection

22 NXPLUS C operation Ready-for-service indicator Control gate Actuating opening for disconnector/earthing switch Opening for charging the circuit-breaker spring by hand Capacitive voltage detection system for the busbar (optional) Spring charged indicator Counter ON pushbutton for circuit-breaker Switch position indicator for disconnector Switch position indicator for earthing switch Circuit-breaker interrogation lever Switch position indicator for circuit-breaker OFF pushbutton for circuit-breaker De-earthing interlock Capacitive voltage detection system for feeder Page 22

Current measurement Ring-core current transformers Main circuit as primary part without dielectric and thermal problems Secondary part accessible outside the enclosure without danger

23 Current measurement Ring-core current transformers 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 1 Busbar current transformer 2 Feeder c.t. at the panel connection 3 Cable-type current transformer 4 Core-balance current transformer Page 23

24 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% U P repeat test with connected transformer Page 24

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

25 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 25

Panel connection outside cone according to IEC 50 181 Maintenance-free due to welded bushings Cable testing without removing

26 Panel connection outside cone according to IEC 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 26

27 Fully insulated panel connections 600 mm panel Possible cable connection per bushing Special connections Elbow plugs or T-plugs with bolted contact Surge arrester or limiter 900 mm panel Elbow plugs or T-plugs with bolted contact Fully insulated bar Elbow plugs or T-plugs with bolted contact Page 27

28 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 28

29 Cable testing without removing the cables Cable test with DC voltage or AC voltage 0.1 Hz Maximum test voltage for U r 12 kv: = 48 kv ~ 19 kv for U r 24 kv: = 70 kv ~ 38 kv Three-position switch and circuitbreaker in OPEN position Cable fault location with lightning impulse voltage Full operating voltage at the busbar Disconnector for voltage transformer at feeder Measuring bolt Insulating cap Page 29

30 Interlocks (selection) Interlocks are designed according to IEC 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 circuitbreaker 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 Page 30

Classification according to IEC 62 271-200 Partition class: Loss of service continuity category: Panels without HV HRC fuses: Panels with HV HRC fuses: PM LSC 2B LSC 2A Accessibility of compartments:

31 Classification according to IEC Partition class: Loss of service continuity category: Panels without HV HRC fuses: Panels with HV HRC fuses: PM LSC 2B 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 s Wall-standing arrangement: IAC A FL 31.5 ka 1 s IAC A FL 25 ka 1 s Page 31

32 Features Environmental independence Compactness Maintenance-free design Personal safety Security of Operation, reliability Economy, ecology Page 32

33 Environmental independence Our solution Hermetically tight welded, no diffusing humidity Stainless-steel vessel, long-time corrosion-resistant Laser-cut, laser-welded materials, exactly fitting quality Welded stainless-steel metal bellows, welded rotary-bushings, for transmission of operating power System-conforming, shock-proof connection systems Non-contact and non-sealed transmission of capacitive voltage detection system Integral, highly sensitive leakage detection system in the factory, gas-tight for lifetime Your benefit Insensitive 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 grease Continuous insulation quality No ingress of foreign bodies, small animals Independent of site altitude Page 33

34 Compactness Our solution SF 6 -insulation, compact construction Combined disconnector and earthing switch, compact switch design User-friendly cable connection height SIPROTEC bay controller: digital control, interlocking and protection system, compact secondary systems with high functional density Your benefit Minimum 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 minimum No cable basement required Economic use of space in urban areas, installation in conurbation, load centres to minimise transmission losses Page 34

35 Maintenance-free design Our solution Hermetically welded stainless-steel enclosure, stable, defined environmental conditions within the vessel Maintenance-free switching devices and operating mechanisms, no adjustment and lubrication Insulated busbar, screened, independent of the environment Enclosed cable plugs, screened, independent of the environment Your benefit No gas work during installation or extensions, no repeated SF 6 -training required for personnel Maximum reliability of supply and availability, no shutdowns for maintenance Sealed for lifetime (according IEC ) No maintenance costs, minimized operational costs Highly economic investment Page 35

36 Personal safety Our solution Hermetically welded enclosure Internal arc classified according to IEC for 1 s Logical mechanical interlocks Capacitive voltage detection system Make-proof earthing through the circuit-breaker Your benefit Touching of live parts excluded, extremely high degree of protection of the primary part Accidental opening of vessel excluded Access to switching devices not required due to maintenance-free design Maloperation excluded Verification of safe isolation from supply without opening the enclosure Page 36

37 Security of operation, reliability Our solution Hermetically welded enclosure, welded stainless-steel metal bellows, welded rotary-bushings Current transformers outside the vessel Metal-enclosed voltage transformers plugged in from outside Plug-in busbar Modular design Minimum use of insulating material Type and routine tests, quality management NC production processes Your benefit Independent of the environment, maintenance-free, no condensation, no oxidation No dielectric and dynamic stress for current transformers Fast transformer replacement possible Easy installation and extension without gas work, short shutdown time for extensions or panel replacement Easy and fast panel replacement Reduced fire load MTBF (3,100 years at the moment) Page 37

38 Economy, ecology Our solution Maintenance-free switchgear Compact construction Economic production SF 6 only used in hermetically sealed pressure system 100% SF 6 -recycling by means of special tools Identified, recyclable insulating material Listing of all materials used Your benefit Minimized operator expenses, high availability Reduced transport costs Minimum requirements regarding the building Minimized transmission losses by installation in load centres Reliable, calculable disposal Page 38

39 Thanks for your attention. NXPLUS C, the gas-insulated switchgear up to 15 kv, 31.5 ka, 2500 A busbar, 2500 A feeders 24 kv, 25 ka, 2500 A busbar, 2000 A feeders Page 40

8DJ. Maintenance-free for lifetime

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