Urgent three phase leakage protection trip cause 20

1。The working center of the control loop cannot be repeatedly grounded. On the one hand, when repeated grounding, under normal working conditions, a part of the working current returns to the neutral point of the power supply through repeated grounding, and an unbalanced current will occur in the current transformer.

When the unbalanced current reaches a certain value, the leakage protector will malfunction; On the other hand, due to fault leakage, the leakage current on the protection line may also pass through the individual line of the current transformer and return to the neutral point of the power supply, which cancels the leakage current of the transformer and makes the protector refuse to act.

2。The lines between the protected electrical equipment and the leakage protector cannot touch each other. If there is a collision between the lines or the intersection between the zero lines, the zero sequence balance current value will be destroyed immediately, and the leakage protector will malfunction; In addition, the protected electrical equipment can only be installed in parallel after the leakage protector, and the wiring is guaranteed to be correct, and the electrical equipment is not allowed to be connected to the wiring of the experimental button.

3。The working line n of the leakage protector protection line should pass through the zero sequence current transformer. Otherwise, after it is turned on, there will be an unbalanced current that causes the leakage protector to malfunction.

You can check if the appeal is caused.

The zero line of the pump should be connected at the front end of the leakage protector, do not share the zero line after the circuit breaker, if it has been used before, and it has only recently tripped, it can be considered that the pump line is leaking, and it may be connected to the building line.

See if it's repeatedly grounded, and if there's a leakage of the pump, it's likely.

It should be a common zero line, and it would be good to change the leakage to an empty open or a group dedicated line.

Almost four reasons.

The first reason is that the connected load or wire has leakage from the live wire or neutral wire to the ground.

The second reason is that there is a short circuit in the load or wire.

The third reason, the load current is too large, resulting in overload tripping, according to the degree of overload, there will be a certain time difference, the larger the overload, the faster the jump. If this is the case, check if it is caused by a load failure or if the original switching capacity is insufficient.

The fourth reason is that the three loads of 380V and 220V are connected at the same time, and the current is unbalanced, resulting in tripping. If this is the case, it is recommended to use a 220V load with a single-phase leakage protector in parallel from the pile head on the switch.

Leakage protection switch.

According to the working principle of the protector, it can be divided into three types: voltage type, current type and pulse type. The voltage protector is connected between the neutral point of the transformer and the earth, and when the neutral point is offset to the ground to generate voltage when an electric shock occurs, the protection action cuts off the power supply, but because it is to protect the entire distribution transformer low-voltage network, it cannot be protected by classification, so the power outage range is large, and the action is frequent, so it has been eliminated.

The pulse type current protector is a sudden change in the phase and amplitude of the three-phase unbalanced leakage current when an electric shock occurs, which is used as an action signal, but there are also dead zones. The most widely used are current type leakage protectors.

Hello The tripping of the three-phase leakage protector may be due to the following reasons:1Electrical equipment leakage:

There is a leakage phenomenon in the electrical equipment, which causes the three-phase leakage protector to trip. You can check the electrical equipment for leakage, and if so, it needs to be replaced or repaired in time. 2.

Three-phase leakage protector failure: The three-phase leakage protector itself is faulty, resulting in tripping. You can check whether the three-phase leakage protector is damaged or aged, and if so, it needs to be replaced in time.

3.Poor wire contact: Poor wire contact or loose terminal block, resulting in tripping of the three-phase leakage protector.

You can check if the wire connection is secure, and if it is loose you need to reconnect. 4.The electric return family source voltage is unstable:

The supply voltage is unstable, causing the three-phase leakage protector to trip. You can check whether the power supply voltage is stable, and if it is unstable, you need to contact the power company for maintenance. Workaround:

1.Check whether the electrical equipment has leakage, and if so, it needs to be replaced or repaired in time. 2.

Check whether the three-phase leakage protector is damaged or aged, if there is a leakage of tung fruit, it needs to be replaced in time. 3.Check that the wire connection is secure and if it is loose it needs to be reconnected.

4.Check whether the voltage of the power supply is stable, and if it is unstable, you need to contact the power company for maintenance. If you are unable to identify the problem, it is recommended that you contact a professional electrical engineer for inspection and repair.

Hello dear and happy to answer for you. Kiss for you to find out: three-phase leakage protector tripping causes and solutions:

1.The insulation of the electrical equipment itself is damaged, resulting in the phenomenon of leakage and tripping of the slip switch when using electricity; Solution: Replace or repair electrical equipment.

2.The damp dielectric strength of the line is reduced, resulting in the phenomenon of leakage switch failure and finch cracking and tripping when non-electricity is used; Solution: Dry the line and improve the dielectric strength.

Check the circuit, if it is caused by a short circuit, eliminate the short circuit fault. 3.Personal accidental electric shock, resulting in leakage switch fault tripping; Workaround:

National electricity safety education to avoid the occurrence of electric shock lead wax accidents. 4.Incorrect wiring during construction and installation, resulting in leakage switch failure tripping phenomenon when using electricity.

Solution: Connect the PE line in the lighting circuit to the N line. The above is all my reply, I hope it can help you, I wish you a happy life

Hello dear, if your 220V load can be used in a different place, there is no problem. Most of them are tripping caused by the leakage protector, because when the three-phase four-wire leakage protection switch is connected to the 380V three-phase load, if the 220V load is connected under the same switch, it will lead to an unbalanced current vector flowing through the zero line, resulting in a leakage collapse The front protector thinks that there is a leakage situation and automatically trips. The solution is to pile a separate and single-phase leakage protection switch from the three-phase four-wire switch, and then connect the load to the single-phase switch.