Automatic switch of -250/400 type
 
 
 
 
 

Description

The circuit breakers are made in the dust-ignition-proof casing unified with the casing of the movable operating element of series. New series of the circuit breakers replace the series -400 -and 40001 and are made as multi-purpose for the currents 250 and 400A with possibility of change-over in the mine. New compact current sensors as well as new control units and fuse blocks unified with the blocks of the starters of the series were used. They distinguish with the reduced weight and overall dimensions.

STRUCTURE OF THE GRAPHICAL SYMBOLS

- 5:
automatic;
circuit breaker;
rated current, A;
remote disconnection;
5 climatic modification and category of allocation.

SERVICE CONDITIONS:

  • altitude up to 1000m above sea level;
  • ambient temperature from -10 to +35C;
  • relative humidity of the air is (982)% at temperature (352)C;
  • content of black dust in ambient air is maximum 1500mg/m3;
  • voltage fluctuation in the electric mains is from 0,85 to 1,1Unom.

FORMULATION OF AN ORDER

Sample designation of the circuit breaker for the current 250A, voltage 380V is

Circuit breaker -250 5, 380 .31.2.-00217159-024-2002.



Characteristics

Characteristics

Parametr Value
Parametr Value
Rated voltage, V 1140/660, 380/660
Rated current, A 250/400
Supply frequency, Hz 50
Limiting switching capacity, kA 8/15 12/22
Mechanical wear resistance of the BO cycles 16000
Commutation wear resistance of BO cycles 6000/10000
Typical operation AC1
Overall dimensions, mm
- height
- width
- depth

915
935
660
Weight, t, min 0,25