Views: 14 Author: Site Editor Publish Time: 2023-01-27 Origin: Site
The residual current circuit breaker is mainly used to disconnect the grounding short-circuit current. Generally, the grounding current is not very large due to the grounding resistance, so the circuit breaker may not operate. Therefore, some circuits need to be equipped with leakage protection, so the measurement of leakage protection is based on zero sequence. The current transformer will act as soon as the three phases are unbalanced.
What is the principle of using residual current circuit breaker?
What is the use value of residual current circuit breaker?
What are the main working parameters of residual current circuit breaker?
For the wiring of residual current circuit breaker with overload and short circuit, they can only enter the line. This is because the trip coil of the residual current circuit breaker is installed close to the load side. When the upper line is connected, the trip coil will trip the circuit breaker when leakage occurs, because the dynamic and static contacts are open, and there is no voltage at the movable contacts. ; If it is changed to the lower incoming line now, after the leakage action occurs, the circuit breaker will be opened, and there will be voltage from the original load end (because the lower incoming line load end becomes the power end) to the release coil and the moving contact. If there is a fault such as surge in the line voltage, the coil will be burned, and the residual current circuit breaker will lose its proper function.
When the load works in an abnormal state for a long time, such as overload, too low voltage or wrong phase sequence, etc., the motor winding will be seriously heated and the motor winding will be burned; in addition, if the motor is in a low voltage operation state for a long time, it will also cause insulation damage and cause insulation damage. Aging accelerates aging and even burns out the motor.
Therefore, the residual current circuit breaker needs to monitor the operation of the motor and take corresponding measures in time to prevent accidents. Motor overheating is one of the important factors affecting the service life of the motor, so measures must be taken to prevent the motor from overheating.
1) Working power supply: three-phase AC 380V±10%.
2) Power: 1500W.
3) Human-machine interface: 4.3-inch touch screen
4) Current and voltage display accuracy: level 1; current resolution 0.1mA; voltage resolution 0.1V.
5) Current output range: AC: 0~1000mA,
6) Voltage output: 0~250V.;
7) Timing accuracy: 5mS, resolution 1mS.
8) A-type phase selection: 0 degrees (500mA), 90 degrees (500mA), 135 degrees (300mA)
9) Type A polarity selection: positive, negative, positive +DC6mA, negative +DC6mA.
10) Working environment: -20～70℃, 90%RH (no condensation).
11) Storage environment: -30～75℃, 90%RH (no condensation).
12) Dimensions: W485mm*D320mm*H340mm.
13) Weight: about 20kg.
JIELI Electrical's production base is still a local patent demonstration enterprise and high-tech enterprise. Possess an annual production capacity of 20 million PCS for MCB and 1 million PCS for RCCB. The customers served are in nearly 50 countries around the world.
