Universal circuit breaker fault analysis, what are the common troubleshooting methods of universal c

Universal circuit breakers are often referred to as frame breakers because they are encased in a frame on the outside, and this term is still common. Universal circuit breakers sometimes have the fault that the main contact does not close or disconnects itself during the closure during use, which causes some unnecessary damage. Studying the reasons for this, there may be the following:

1) Because the energy release coil often passes through a large current, the coil is overheated, causing unstable work.

2) Because the relay is under high voltage for a long time, the contact surface is oxidized, the contact resistance becomes larger, and the contact cannot be connected normally.

3) Due to the dislocation of the stator and rotor in the motor, they rub against each other, generating a lot of heat, causing the motor to be unstable and even stopping, resulting in the universal circuit breaker can not work normally.

Generally speaking, in view of the above several phenomena, the more common solutions are: after the relay contact is oxidized, the relay cover can be removed and each contact can be lit with sandpaper. After the reinstallation, the universal circuit breaker works in a stable state.

The rotor bearing is found to be tilted, and if there is friction between the rotor and the stator. Just move the bearing, fix it, put it on the cover and test run it, and everything will be back to normal.

Universal circuit breaker fault analysis, universal circuit breaker, if there is a fault, one is inseparable, and then it cannot be closed, and then it cannot be closed, which is basically caused by overvoltage or overcurrent.

The failure of this universal circuit breaker can be that the system is all crashing. The specific cause should be identified in a timely manner.

Many of the sizes are the same, which is a simplification. Same. The size is the same, the size is the same.

The official is consulting and let's analyze the fault, and I can know if I consult again.

1. The noise of the undervoltage tripper: the undervoltage tripper often produces abnormal noise after working for a period of time, which is disturbed at least and burned by the coil, so the oil and dust on the working surface of the core should be removed regularly, and the short-circuit ring should be replaced if it is found to be broken. 2. Burning of micro motors:

The failure of the travel switch will cause the micro motor in the electric operating mechanism to burn out. If it is necessary to close the circuit breaker with an electric operating mechanism, press the closing button, and after completing the energy storage or closing of the mechanism, the power supply circuit of the micro motor should be disconnected by the travel switch. 3. Short circuit caused by poor insulation:

If the insulation performance of the circuit breaker is used for a long time, the dust accumulation on the surface of the insulation parts will promote the accelerated aging of the insulation, which may cause a short circuit between phases or relative to the ground during the power distribution operation or when the short-circuit current is cut off. Therefore, it is necessary to keep the insulating surface clean and prevent the insulation performance from deteriorating, so as to prolong the service life of the Broken Ling Pai car.

1.Noise of undervoltage tripper: After working for a period of time, the undervoltage tripper often produces abnormal noise, and the circumference of the fan stupid hall ranges from interference to burned-out coils.

Therefore, the oil and dust on the core working surface should be cleaned regularly, and the short circuit ring should be replaced if it is found to be broken. 2.Micromotor burnout:

The failure of the travel switch can cause the micromotor in the electric operating mechanism to burn out. If you need to close the circuit breaker with an electric operating mechanism, press the close button, and after the mechanism is stored or closed, the trip switch should disconnect the power supply circuit of the micromotor. 3.

Short circuit caused by poor insulation: The insulation performance of the circuit breaker will gradually deteriorate after long-term use. If not properly maintained, dust on the surface of the insulating components will accelerate the aging of the insulation, which may cause interphase or ground shorts during distribution operation or when the short-circuit current is cut off.

Therefore, it is necessary to keep the insulating surface clean to prevent the deterioration of insulation performance, so as to prolong the service life of the stool with only hidden long circuit breaker.

The operation of the universal circuit breaker is either manually operated or electrically closed. After the main contact is closed, the free trip mechanism locks the main contact in the closing position. The coil of the overcurrent tripper and the thermal element of the thermal tripper are connected in series with the main circuit, and the aluminum veneer is a new type of curtain wall material that uses high-quality aluminum alloy plate as the base material, and then forms it through CNC bending and other technologies, and sprays decorative coatings on the surface.

The coil of the undervoltage tripper and the power supply are connected in parallel. When the circuit is short-circuited or seriously overloaded, the armature of the overcurrent tripper is engaged, so that the free tripping mechanism acts, and the main contact disconnects the main circuit. When the circuit is overloaded, the heat of the thermal element of the thermal tripper causes the bimetal sheet to bend and push the free release mechanism to act.

The shunt tripper is used for long-distance control, and it has been proved in practice that the use of the TRIZ theory can greatly speed up the process of people's creation and invention and can obtain high-quality innovative products. In normal operation, the coil is de-energized, when the distance control is required, press the start button to energize the coil, and the armature drives the free trip mechanism to act, so that the main contact is disconnected.

The working principle of the universal circuit breaker, the operation of the universal circuit breaker, follow the professional master to learn the right!

Arranged in approximate order according to the frequency of the quarrel):

1) Seal failure failure;

2) Failure of action; Rise or cons or.

3) Damaged or poor insulation;

4) Failure of the arc extinguishing contact.

1. Lubricating oil must be added to each rotating shaft hole and friction part regularly.

2. When the circuit breaker is used, the anti-gel oil on the working surface of the magnet should be wiped clean and kept clean.

3. The circuit breaker should be checked regularly during use to ensure the safety and reliability of use.

The contact system is inspected on a regular basis. (Note: The Iwayuga circuit breaker should be in an isolated position during inspection).

4. When the circuit breaker breaks the short-circuit current, in addition to checking the contact system, it is also necessary to remove the smoke marks on both walls of the arc extinguishing cover and check the burning of the arc extinguishing grid, if it is serious, the arc extinguishing cover should be replaced.