Schneider electrical circuit control fault range

Create Date: 2024-8-30 12:03:23|Source: Schneider/Schneider

In general, depending on the phenomenon of equipment problems, the scope of the problem can be roughly confirmed as follows:

Schneider electrical circuit control fault range

Schneider electrical circuit control fault range

1) All button functions fail, and there is a high possibility of power supply or fuse problems.

2) Some buttons are invalid, and some buttons are functioning normally. At this time, the problem is mostly in the common part of this part of the circuit or the power supply part of this part of the circuit.

3) A single button or a single function fails, and the button itself and the lead wire are more likely to cause problems.

4) Most of the problems, if it is equipment that is not used for a long time, it may be the problem of poor contact or leakage, or other problems caused by poor contact and leakage.

5) Soft problems, if there is a certain law with time or external environment, it may be that the circuit is connected with the external environment, and some functions are deteriorated and will be affected. If there is a certain relationship with the working time, the Schneider inverter is greatly affected by the temperature, which may be the deterioration of the function of the component, such as leakage, unstable function or failure caused by dirt. For example, the reversible control of a certain motor presents the problem that it cannot rotate forward, but can only rotate. Based on this feature, it is possible to confirm that the problem is in the forward control circuit, but not in the motor itself and the rotary control circuit. Press the forward button and do not let go, and then press the rotary start button, the motor does not rotate to start, which clarifies that the button interlocking function is useful, and the circuit fault is in the forward rotation control loop.

Then, following a step-by-step approach from back to front, check the forward contactor first. The coil leads are passed over the buttons and other contacts and directly connected to the power supply, and when the power is turned on, the motor rotates forward, indicating that there is no problem with the contactor. Then connect the lead wire to the start button, turn on the power, press the start button, the motor rotates forward, and the forward rotation button is clarified. There is only one dynamic breaking contact of the rotary button and the dynamic breaking contact of the rotary contactor connected in series between the forward button and the forward contactor, and the circuit has a problem, and the fault point is on the dynamic breaking contact of the rotary button and the rotary contactor, and after inspection, it is found that the dynamic breaking contact of the rotary start button can not be closed outstandingly.

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