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KP-DW45

DW45 series Intelligent Air Circuit Breaker is extensively used as the main switch in the low voltage distribution switchboard of rated voltage of 400V and 690V, rated current of 630A to 6300A, 50HZ or 60HZ. Its function is to control and protect the electr ical circuit from damage and prevent power equipments from harm of overload, under-voltage, short circuit and single phase earth etc. Provide with intelligent protecting function and precise selective protection, breaker can enhance the dependability of power supply and avoid unwanted power cut. It comply with IEC60947-2 standard.

KP-DW45

 Feature of DW45 Intelligent Air Circuit Breaker(ACB):

- Rated AC current: 630A-6300A
- Number of poles: 3 pole and 4 pole
- Two Types: draw-out type and fixed type
- Short-circuit breaking capacity: 80KA-120KA
- Rated Voltage: under AC690V
- Operation type: manual operation, auto operation
- Trip types: Intelligent controller, under voltage instant (or time delay type) trip and shunt trip
- Intelligent controller types: L type (basic type), M type (Standard type), and H type (communication type)
- Standards: IEC60947-2, GB14048.2
 
Normal Working Conditions of DW45 intelligent Air Circuit Breaker(ACB):

- The ambient temperature of our intelligent circuit breaker should be within -5 to +40. The average temperature should not be more than +35(except for customized designs)
- The altitude should be below 2000M.
- The relative humidity should not be more than 50% at +40 , the upper temperature limit. At lower temperatures, higher humidity is allowed e.g 90% at 20. Dew that is formed during temperature variation should be eliminated, to increase its durability.
- Pollution grade: class 3
- The following have an installation grade of IV: main circuit, absent voltage release coil, power transformer primary coil. Other auxiliary circuits and controls have a mounting grade of III
- The circuit breaker should be installed according to the manual. The vertival tilt angle should not exceed 5 degrees.
- If the air circuit breaker is installed in a small compartment of the switch board, the protection grade is up to IP40. If it is then fitted with a door frame, the protection grade is up to IP54.

Frame size rated
current inm(A)

Rated current InA

Rated insulation  voltage(v)

Rated limit short-circuit breaking capacity lcu(kA)

Rated operating short-circuit breaking capacity lcu(kA)

Rated short-time withstand current lcw kA(1s)

 

 

 

400V

690V

400V

690V

 

2000

630
800
1000
1250
1600
2000

690

80

50

50

40

50

3200

2000
2500
3200

 

100

65

65

50

65

4000

3200
3600
4000

 

100

65

65

50

65/80

6300

4000
5000
6300

 

120

80

80

70

85/100

 

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