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| Checking Contactor using Multimeter |
Checking Contactor using Multimeter
Welcome to the Electron Tips blog, In today’s topic we will learn how to check the contactor compound, which is considered one of the most important electronic elements in the field of automatic control, We have previously explained its working principle in a separate topic that you can browse from here, Now we move on to the most important steps that must be followed to test the contactor component .
A reminder of the principle of contactor work:
The contactor is an electromagnetic switch that contains an electrical coil that controls the connection and disconnection of the power circuit. The contactor element is used to control electric motors and pumps by implementing many types of operation and it serves as the backbone of automatic control.
How to check the contactor compound using a multimeter:
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| Contactor |
After we learned the definition of the contactor compound, let us now go through the steps of examining the contactor compound using a digital multimeter:
First: Completely disconnect the feed from the contactor.
Second: Make sure that there are no visible burns or scratches on the contactor device.
Third: The measurement of the contactor resistance value must be very small or equal to zero.
Fourth: The measurement of the contactor coil must be within the range specified by the manufacturer. If it is equal to zero it is damaged.
Fifth: Place the multimeter on the bell position and measure the three contactor terminals for connecting power to the electric motor, as they are closed in the normal position.
Common contactor device malfunctions:
Contactor devices are subject to many malfunctions that cause them not to operate normally, These are the most common malfunctions to which contactors are exposed:
There is a defect in the contactor coil, which may burn due to a high electrical current.
The internal electrodes of the contactor do not touch due to dirt and dust which leads to the contactor not working.
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Contactor Symbol structure principle of working.
Conclusion:
In the end, this was a comprehensive explanation of the steps for examining the contactor compound using a digital multimeter, You can browse a comprehensive topic on how to use a digital multimeter for beginners from here, As usual, if you have any questions or inquiries about this educational topic, you can ask them in the comments section or on our page at Facebook " Electrical Engineering Tips".