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Product general description

SIRING series products, comprising solid-insulated modules and operating mechanisms, have been co-designed with European switchgear experts. These products were specifically developed for solid-insulated Ring Main Unit of 12/15kV power distribution networks and are fully compliant with relevant GB, DL and IEC standards.

Modular design and flexible combination. We can provide completed vacuum circuit breaker, vacuum loadbreak switch and fuse switch solutions for solid-insulated RMU.
No SF6. Green solution by applying vacuum and solid-casting technology. Solid insulation surface is at earth potential, drastic reduction of phase-to-phase risk and 'accidentally touchable'.
No exposed live parts. Modules is insensitive to harsh environments and suitable for strong wind, severe cold, coastal, high humidity and high altitudes.
Integration design and assembly of operation mechanism. Reliable interlock and high accurate movements. Remote, local manual and local automatic control function are available that are ready for smart grid integration.
  Specification
  Unit Ratings
Circuit Breaker Loadbreaker switch Fuse switch 3 positions switch
 Rated voltage  kV rms 12/15 12/15 12/15 12/15
 Rated voltage  Hz 50/60 50/60 50/60 50/60
 Rated short-duration power-frequency withstand voltage (1min)
 To-earth between phases  kV rms 42 42 42 42
 Across isolating distance 48 48 48 48
 Rated lighting impulse withstand voltage (peak)
 To-earth between phases  kVp 95 95 95 95
 Across isolating distance 110 110 110 110
 Rated current  A rms 630 630 125 630
 Short-circuit breaking capacity  kA rms 20      
 Maximum number
 of operations at 100% lsc
 Number of
 operations
50      
 Rated making capacity  kAp 52 52 52  
 Rated short-time
 withstand current and duration
 kA rms 20 20   20
 S 4 4   4
 Peak withstand current  kAp 52 52   52
 Capacitive breaking capacity  A rms 25 10    
 Rated breaking transfer current  A rms     3150  
 PD on primary modular  pC < 5 < 5 < 5 < 5
 Rated operating
 sequence of circuit breaker
  O-0.3s-CO-
15s-CO
     
 No-load mechanical endurance  Cycles ≥ 10'000 ≥ 10'000 ≥ 10'000 ≥ 3'000
 IP code   IP68
 Altitude  m ≤ 5000
 Operating temperature  ℃ -40~60
 humidity   any
 


Product Options

We are able to provide any of following products according to your requirements.

Individual modules

1) Operation mechanism with various functions;
2) Vacuum circuit breaker
3) Vacuum loadbreak switch and
4) Fuse switch modules (each including busbar assemblies)

 

 

 

Complete functional assembly

Fully functional, type tested assemblies of vacuum circuit breaker, vacuum loadbreak switch or fused loadbreak switch complete with operating mechanisms incorporating primary (excluding cabinet) interlocks. (Refer to diagrams on next page)

 

 

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