What are the common relays
June 16,2022
Custom smart RS485 relay,dc current monitoring relay,china smart relay
There are many commonly used china smart relays, such as intermediate relays, time relays, current relays, voltage relays, speed relays, thermal relays, solid state relays, spring relays and so on.
We have to choose different dc current monitoring relays according to our needs. For example, if you need to control the time, use a time relay. If you need to control the on-off of the line according to the voltage, use the Custom smart RS485 relay. If you need to control the on-off of the line through the magnetic field, use the reed relay, etc.
Intermediate relay
The principle of the intermediate relay is similar to that of the AC contactor, except that it has fewer main contacts than the AC contactor, so this determines that it cannot switch large currents. The main function of the intermediate relay: it can increase the number of contacts and transmit signals.
current relay
The current relay, as the name implies, is to control the circuit on and off according to the current signal. It has overcurrent relays and undercurrent relays, and also has both overcurrent and undercurrent functions. For example, in order to protect a certain equipment from being burned due to excessive current, china smart relay can be used.
solid state relay
The solid-state dc current monitoring relay, as its name implies, is a whole with no contacts in the middle. It is mainly composed of electronic circuits, and photoelectric isolation is used between the input circuit and the output circuit. In addition, because it has no contacts, it can be frequently connected and disconnected without arcing, and it can be applied to inflammable and explosive places.
thermal relay
Thermal relays, as the name suggests, rely on current to generate heat to achieve the purpose of connecting and disconnecting control circuits. The main contact of the thermal relay is composed of two metal sheets of different materials. When the current passes through the bimetal sheet, heat is generated. The bimetal expands and bends when heated, and then pushes the connecting rod, which makes the auxiliary contacts turn on and off.
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