Questions regarding 220V motors, everyone
Thread Content
When switching a 220V motor, the voltage measured is over 300V, which always causes the relay to burn out. I would appreciate it if everyone could suggest a solution.
Use a solid-state relay; without mechanical contacts, it won’t get damaged!
It’s as if nothing was said; I want to find out where the problem lies. Why is it always burned?
Is it the voltage that reaches over 300 volts at the moment of starting and stopping? Where does such high voltage come from?
It’s not instantaneous; during the switching process, it’s over 300.
Is there a mistake in the wiring? One live wire and one neutral wire should be used, rather than two live wires! But such a basic mistake shouldn’t be made, right!
Reply to 1# wangshusen11: Because the information provided is unclear. Please explain the electrical conditions of the motor, so I can help analyze it. The total burnout relay may be due to the small contact capacity of the relay’s moving and stationary contacts; if the installation space is limited, it is advisable to use imported relays. If the installation area is large enough, a contactor can be used, with its three contacts connected together by wires. For example, if your motor current is 5A, you can choose an AC contactor such as NC1-09, with a coil voltage of AC220V. The original relay can be used to drive the contactor.
Reply to 7# czywqa: What was said on the sixth floor is correct; is the power supply 380V?