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.
+ 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 |
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| 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.) |
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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) |
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Average over 24 hours |
Not exceeding 35ºC |
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Minimum |
-5ºC |
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Altitude |
Not exceeding 1,000m |
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Average relative humidity over 24 hours |
Not exceeding 95% |
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Finish |
Epoxy powder paint coating after derusting, degreasing and phosphating |
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|
Colours |
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Pipeline grey (AS2700 colour N43) |
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Other colours optional |
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