IEC 62271 Single Busbar Panel
LMVP 12kV single busbar panel
The switchgear is housed in a Fixed Enclosure. This is a rigid sheet steel cubicle consisting of four main sections:
- Busbar and Current Transformer Chamber
The busbar chamber contains three-phase copper busbars rated at 1250A, 2000A, 2500A or 3000A.
The rear section of the chamber houses the current transformers which may be:
– Low voltage insulated, mounted on an earthed screened primary bushing, silica-filled epoxy resin insulated.
– Either bar or wound primary type depending on the specification.
– Current transformers comply with IEC 61869-1, IEC 61869-2.
The control cubicle houses the relays and control equipment, protection relays and instruments.
Air insulated cable boxes for heat shrink cable termination.
- Circuit Breaker Compartment
The bottom section houses the circuit breaker.
Guide rails allow smooth, safe and easy entry and removal of circuit breakers ensuring accurate location in the correct position.
Internal Arc Compliance (IEC 62271-200)
LMVP CERTIFICATION
Front, lateral and rear access, 25kA for 1 second:
- Certified to IEC 62271-200.
- Ducted and internally vented solutions.
- 4-sided access, category “A-FLR”.
- Vents safely into the substation via thermal control baffle system or externally.
- Ceiling height – down to 2.8m.
- Configurable for different substations.
- Excellent thermal profile around switchboard during fault, enhancing operator safety.
Seismic Compliance (1g)
Recent earthquakes influenced requirements with customer specifications changing, RPS has tested to the highest qualification now specified.
The requirement is now for test level equivalent to 9.5 on the Richter scale.
Tested to IEEE 693:
- Resonance frequency tested on 3 axes.
- Time history test on x,y,z axes at 1g for 30s.
- Auto re-close operation proved during test.
- Functional tests before and after seismic tests.
