Why Is The Relay Disconnected?

Jul. 23, 2018

With the development of technology and electronic information technology, relays as basic components are widely used in the field of automation control such as home appliances, communications, automobiles, instrumentation, machinery and equipment, and aerospace. However, we also found that the relay will also have some problems, for example, it will not be disconnected, then why is the relay not disconnected? Let's take a look at the following:

1. The line voltage transient causes the SSR output part to pass through. In this case, use a higher rated SSR or provide an additional transient protection circuit.

2. The line voltage used is higher than the rated voltage of the SSR.

3. The load current is greater than the rated switching current of the SSR. This will permanently short the relay. In this case, the SSR with a larger rated current should be used.

4. At the ambient temperature where the relay is located, if the heat is not good, the output semiconductor device may be damaged. In this case, a larger or more effective heat sink should be used.

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