The relay that controls the original is to control the closing action by generating the minimum current for the pull-in action. Generally, in use, the given current needs to be slightly larger than the pull-in current, and the relay can work normally and stably when this standard is reached. For the working voltage applied to the coil, normally it cannot exceed 1.5 times the rated working voltage. If the voltage is greater than this multiple, a large current will be generated and the coil will be burned out.
From the control element in the application, the relay has the following advantages:
One, zoom in. For example, intermediate relays, sensitive relays, etc., using a very small amount of control, can control circuits with high power.
The second, the integrated signal. For example, when multiple control signals are input to the multi-winding relay in a specified form, the predetermined control effect is achieved through comparison and synthesis.
Three, automatic, remote control, monitoring. For example, the relays on the automatic device, together with other electrical appliances, can form an automatic program control circuit to realize automatic operation.
Fourth, expand the scope of control. For example, when the control signal of the multi-contact relay reaches a certain value, it can switch, break, and connect multiple circuits at the same time according to the different forms of the contact group.