What is the difference between current relays and intermediate relays?
In the strong power, the main circuit with the relay called the current relay, empty circuit used on the relay called the relay. Features are: current relay is mainly required to pass a certain current. Intermediate relay is mainly required to have a certain number of contact points.
Current relay sub-current relay and under-current relay, the coil need to be connected in series in the circuit, mainly used to compare the current flowing in the circuit and the relay rated action set value of the size of the over-current relay is to protect the load over-current; The undercurrent relay is released when the coil flows below the set value and signals are sent through the auxiliary contact. Function is different, use different. But there is a similar feature: the coil to flow through the current, the impedance should be as small as possible, so the coil is relatively thick.
The concept of intermediate relays is relatively broad and there are many types. Its role is to convert a signal, isolation or amplification. Usually the middle of the relay used in the factory is used to convert a signal through it into several normally open, normally closed signal to facilitate the control of the logic of the interlock and drive more appliances, but also amplified the control capacity.
Current relay is a specific size of the current through a specific time after the action of the relay, mainly for the circuit, the motor protection relay;
?? Intermediate relay is driven by low-power low-voltage relay work, which led to ordinary contactor work. Is the transistor circuit, integrated circuits, microcontrollers and other output indirect control of high-power intermediate relay.
