Selection and calculation of circuit breaker for motor protection

Publish Time: Author: Site Editor Visit: 455

Circuit breakers for motor protection can be divided into two categories:

1) The circuit breaker is only for protection and not for normal operation.

2) The circuit breaker is used for both protection and infrequent operation.

Selection principle:

(1) Isd = In

Where ISD -- setting value of long delay current, a;

In -- rated current of motor, a.

(2) Instantaneous setting current in

1) When protecting cage asynchronous motor

2)Protection of wound rotor asynchronous motor

Recent News
Recommend Products
Food Paper Bags RFID Seal Cable Seal TWS Wireless Earbuds Sanitary Butterfly Valve Sanitary Ball Valve Insulated Piercing Connector Rigid Box Machine Rigid Box Machine Small Size Ball Valve Bolt Seal Flexible Copper Braided Wires 1PC BALL VALVE Sanitary Centrifugal Pump Acetate Optical Frames Sanitary Butterfly Valve 卫生离心泵 卫生离心泵 Anti Corrosion Pipe Supports Straw Paper Machine