Fixed Type Air Circuit Breaker
Fixed type air circuit breakers are are designed for distribution networks operating at an AC frequency of 50 Hz or 60 Hz,hey are suitable for systems with a rated voltage of 400 V or 690 V and a rated current of up to 6,300 A.It is an electrical switching and protection device that uses atmospheric pressure air to extinguish the electrical arc formed when a circuit is interrupted.
Description
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Product Details
Fixed type air circuit breakers are are designed for distribution networks operating at an AC frequency of 50 Hz or 60 Hz,hey are suitable for systems with a rated voltage of 400 V or 690 V and a rated current of up to 6,300 A.It is an electrical switching and protection device that uses atmospheric pressure air to extinguish the electrical arc formed when a circuit is interrupted. Fixed type air circuit breaker is primarily in low and medium-voltage power distribution systems.
Fixed type air circuit breaker owns the advanced intelligent technology, provide the high accuracy, accurate selective of the tripping, and reliable fault detection.
This smart design boosts the selectivity of power supply, reduce the power outages as limited as possible, and improves the reliability of overall supply.
These air circuit breakers can cut down the faulty sections quickly, they effectively prevent the unneccessory power outages, and fully meet the safe operating of power systems.
Feature
- Frame Current: 2000A, 3200A,4000A,6300A
- Rated current: 400A-6300A
- Rated working voltage: AC400V /AC690V
- Frequency: 50Hz,60Hz
- Number of Poles: 3P,4P
- Installation: drawer type,fixed type
- Wiring method:horizontal connection,vertical connection.
Technical Parameter
|
Item |
Description |
|
Ambient Temperature |
-5℃~+40℃;the average value within 24h shall not exceed +35℃; L type and M type controller can be used under -40℃~+70℃ |
|
Altitude |
≤2000m |
|
Pollution grade |
3 |
|
Safety category |
Main circuit and undervoltage tripping coil is IV, other auxiliary and control circuit is III |
|
Installation position |
Vertically installed, inclination between the mounting plane and the vertical plane should not exceed ±5° |
|
Item |
Description |
|
|
Shell current Inm(A) |
2500 |
4000 |
|
Rated working current In(A) |
630,800,1000,1250,1600,2000,2500 |
2000,2500,2900,3200,3600,3900,4000 |
|
Rated wordking voltage Ue(V) |
800/1140 |
|
|
Rated insulation voltage Ui(V) |
1140 |
|
|
Rated impulse withstand voltage Uimp (KV) |
12 |
|
|
Power frequency withstand voltage (V)for 1 minute |
3500 |
|
|
Number of poles |
3P,4P |
|
|
Rated limit short breaking capacity Icu(KA) |
800/1140V |
50 |
|
Rated operating short-circuit breaking capacity Ics(KA) |
800/1140V |
50 |
|
Rated short time withstand current for Is ICW (KA) |
800/1140V |
50 |
|
Full power interruption time (without additional delay)(ms) |
12-18 |
|
|
Closing time(ms) |
≤60 |
|
|
Electrical lifespan |
2000 |
|
|
Mechanical life (maintenance free) |
10000 |
|
|
Mechanical life(with maintenance) |
20000 |
|
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