Why does the first case of the electric gourd jump lock
Trip reasons mainly has several kinds: power supply is overloaded, electric hoist motor is conical rotor motor, if the job card is can't open the gate, overload will occur and is the motor current increases and cause tripping, and circuit grounding, belongs to the line with intermittent grounding, because the electric hoist move sometimes lines grounding and tripping. The circuit breaker itself fails or the circuit breaker is optional.
If normal to see whether the three phase current balance, if not balance, check the circuit breaker. Contactor. Wired contact between motor whether fastening and contactor main contact whether to burn out, may be there is something wrong with the motor parts to normal; If the balance and current is greater than the rated current of the circuit breaker, a larger circuit breaker is required
Started with a multimeter to measure the electric hoist followed by level 1 box of three phase current and voltage of circuit breaker, look at the three phase voltage is less than 5% of the rated voltage, if low first solve the problem of voltage.
