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| What is the role of power relay in industrial control systems? | ||||
| Publisher:admin | Add time：2018/10/30 | Viewed：913 | ||
| Power relays, what is the role of relays in industrial control systems? The relay can generate a minimum current of pull-in action. What is the role of power relay in industrial control systems? Let's take a look! As a control element, the relay has the following functions: 1) extend the control range. For example, when the control signal of multi-contact relay reaches a certain value, it can be changed, switched on and connected to multi-circuit at the same time according to different forms of contact group. 2) amplification. For example, sensitive relays, intermediate relays, etc., can control large power circuits with a very small amount of control. 3) integrated signals. For example, when multiple control signals enter multiple winding relays in the prescribed form, through comparison and synthesis, the intended control effect is achieved. 4) automatic, remote control and monitoring. For example, the relay on the automatic device, together with other electrical appliances, can constitute a program-controlled circuit to realize automatic operation. In normal use, the given current must be slightly greater than the pull-in current so that the relay can work steadily. As for the working voltage of the coil, generally do not exceed 1.5 times of the rated working voltage, otherwise the coil will be burnt due to large current. | ||||
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