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Double Busbar panel

The fixed metal-clad Enclosure comprises:

+ A Control Cubicle in which the low voltage relays and    instruments are fitted.

+ Two busbar chambers segregated from each other and    running the length of the switchboard. Each chamber    supports one three-phase set of insulated high conductivity    Copper busbars.

+ A Current Transformer chamber from where the Measurement    and Protection devices get their inputs.

+ A Cable Box from which Power Cables are connected to the    Transformer in the case of Incomers and Loads in the case of    Feeders.

+ A Voltage Transformer and its Housing may be incorporated    so as to engage with the Circuit (Cable) or Busbars.

+ A Circuit Breaker chamber into which the withdrawable part    engages.



The withdrawable Carriage normally carries a Vacuum Circuit Breaker. The Circuit Breaker is vertically raised/lowered to engage/dis-engage with the main busbars. The unit can be placed in either the FRONT BUSBAR or the REAR BUSBAR position. The Carriage is horizontally drawn-out or rolled-into the compartment.

Single Busbar Panel consists of a Fixed part and a Withdrawable part.

 LMVP Vacuum Breaker panel ratings
 Rated normal current (amps)
630
800
1250
2000
2500
 Rated voltage (kV)
3.6
3.6
3.6
3.6
3.6
7.2
7.2
7.2
7.2
7.2
12
12
12
12
12
 Rated max.short-circuit  breaking current (kA)
25
25
31.5
31.5
31.5
 Panel width (mm)
584
584
584
914
914
 Standards:
IEC 60298, IEC 60694, AS2086, AS2650



 Type LMVP Switchgear Specifications
 Standards
 IEC 60298, IEC 60694, AS2086,  AS2650
 Rated voltage
 Up to 12kV (r.m.s.)
 Rated insulation level
  Lightning impulse   withstand
 75 or 95kVp
  1 minute power-   frequency withstand
 28kV (r.m.s.)
  Additional tests
42kV (r.m.s.)
  Rated frequency
50Hz
 Rated short-time  withstand current
Up to 31.5kA
 Rated peak withstand  current
up to 79kAp
 Rated duration of short-  circuit
3 seconds, Additional test 4 seconds
 internal fault (type  tested)
25kA
 Construction
Metalclad
 
 Degree of protection
  Standard
 IP3X (approaching IP4X)
  Optional
 IP4X or higher to suit specific requirements
 Normal service  conditions
Indoor
 
 Ambient air  temperatures
Maximum
40ºC (without derating)
Average over 24 hours
Not exceeding 35ºC
Minimum
-5ºC
 Altitude
Not exceeding 1,000m
 Average relative  humidity over 24 hours
Not exceeding 95%
 Finish
Epoxy powder paint coating after derusting, degreasing and phosphating
 
 Colours
Pipeline grey (AS2700 colour N43)
Other colours optional