What kinds of relays can be classified
In our electric facilities, we often use a kind of electrical appliances is the relay, which is used in the automatic control circuit, is a switch of current operation, it has a conversion circuit, automatic regulation, safety protection role.Relays have different types according to their different working principles and structural characteristics.
The first type, electromagnetic relay, as its name implies, is an electrical device that works on the principle of electromagnetic effect. It USES magnetic effect to switch on the power box and cut off the power supply.
Second, the reed relay is a coil induction current sensing device, it is a magnet metal or other magnetic near the device to close or open the circuit.It has a very strong construction and high durability, which serves as a limit switch for the position of mechanical equipment. It can also be used to detect Windows and iron outlets that are not in the designated position.
Third, the time relay is a kind of time-delay control electrical appliances, there are many kinds of it.The air-damped time relay is commonly used in ac circuit, which can effectively delay the time of power on and off according to its own working principle.
Fourth, according to the natural induction raw materials used to query and control the temperature of the mechanism is called thermosensitive spring, its working principle is to use a special material (temperature sensing magnetic) to the surrounding temperature sensitive characteristics of the work.
The fifth kind of optoelectromechanical device is a device that controls the transmission of optical signals.
Sixth, many automatic control and protection lines will use intermediate relays, very easy to install wiring, use time is also very long, low power consumption, after work there are light tube indicating, easy to observe the site, repair.