What is the reason why the 380 AC contactor burns into the line end power line when it is powered on?
Jun 13,2023 | simplybuy industrial
1. What is the reason why the 380 AC contactor burns into the line end power line when it is powered on?
If the 380V voltage is connected well, the coil of the AC contactor is burned out, obviously you have chosen the wrong coil voltage. The coil voltage of the AC contactor is graded. Such as DC 24V, 36V, AC 220V, 380V, etc., if it burns as soon as it is powered on, it means that the coil voltage selection is wrong. It is very likely that you use a DC AC contactor, but use a 380V AC voltage. According to normal conditions, a 220V AC contactor will still work for a period of time and then burn out when the voltage is 380V. How to check the AC contactor What about coil voltage? The AC contactor will be marked on the nameplate on the surface. If there is no nameplate, then check whether there is a voltage mark at the terminal, and select the appropriate voltage to ensure the normal operation of the AC contactor. Burnout of the main contact: When the main contact is burned out after power-on, there may be a problem with the load. The main contact is used to control the on-off of the load. When the load is short-circuited or overloaded, it is easy to cause the main contact to burn out. , at this time, do not try to power on again, and must check where there is a problem at the load end. After solving the problem at the load end, try to use 380V voltage to connect the AC contactor. If the AC contactor can work normally at this time or leave the load end, directly connect the AC contactor. If it can be used normally, it means that the load There is a problem on the end.
2. It was used well before, but after stopping for a period of time, the power cord was burned when the power was transmitted.
220v to 6v DC power supply will burn if the power is cut off and then re-sent. The power supply itself is not sufficiently resistant to current impact, and there are substandard components
3. I am a 380 AC contactor
AC contactor is an electrical control component often used in electrical equipment, especially motor control. What is the reason why the 380V contactor burns as soon as it is powered on? It is likely that the wiring of the coil power supply is wrong, because other wiring errors are almost less likely. If the wiring is wrong, at most it is just a control failure or no action. What is the reason why the 380V contactor burns as soon as it is powered? So carefully check whether the power supply voltage of the pull-in coil of the AC contactor is 220v or 380v. If the 220v is wrongly connected to 380V power supply, the AC contactor will be burned device. First of all, it is necessary to clarify a question, is the coil burning or the contact burning? Secondly, if the coil is burning, check the control circuit voltage; if the contact is burning, check the maximum current load of the contactor. Finally, it is recommended that professionals handle it. Is the main contact burned out, or the coil burned out. If the main contact is burned out, there are two reasons. One is that the size of the contactor is not matched with the control electrical appliance. The second is that there is a short circuit in the electrical appliance, and the contact will be burned when it is turned upside down. If the coil is burned, it is likely to be a product quality problem. Under normal circumstances, it is impossible to burn it with a 380 coil with a 380V voltage. Unless it is a quality problem, it will heat up and burn out.