1, classification From the power requirement of the driving time relay (drive line package working voltage), the general relay is divided into AC relay and DC relay, which are used for AC circuit and DC circuit respectively. In addition, according to the working voltage level, there are 6, 9, Different working voltages such as 12, 24, 36, 110, 220, 380 are used on different control circuits. Another distinguishing point of the time relay is its contact (the switch that turns on or off the controlled circuit, the difference between normally open, normally closed, and converted, and the difference of the number of contacts, how much work can be controlled. The difference between voltage and current (that is, the power allowed by the contact) is used for different purposes; in addition, the special contact has self-locking (the state that the contact itself remains out of control even after the control voltage disappears after the action) Types such as suction or time release function are available for special cases. 2, special types Step relay : In the past, the automatic telephone switchboard used a lot. The relay itself can automatically move the movable contact to the corresponding position according to the number of pulses of the input control coil. For example, if 6 pulses are input, the movable contact will be connected to the 6th touch. Point, enter 9 pulses, and then receive the 9th contact, so. The phone automatically transfers to the desired line based on the dial pulse number. Resonant relay : The relay itself has a plurality of moving contacts with different lengths and thicknesses, such as reeds. The resonant frequencies of the contacts themselves are different and reasonably distributed. When the current frequency of the input relay coil is exactly the same as that of a reed contact When the resonant frequency is the same, due to the resonance, the reed generates a large shock, so that the corresponding fixed contact is closed, and when another frequency signal is input, the other contact can be actuated, which is equivalent to translating signals of different frequencies into corresponding The circuit connection action, which is completely different from the current electronic decoding, is achieved by mechanical principle. The above is the introduction of the type of time relay. The time relay is mainly used to control the circuit voltage. It can effectively control the circuit, and can also be equipped with different circuits for sorting. When choosing a time relay, we should choose according to different circuit types to purchase a suitable relay.
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What are the types of time relays? Classification introduction
The time relay can be divided into two types according to the classification. The more common water and electric is the step relay . The stepping time electric appliance itself can input a plurality of corresponding points, and can connect different voltages to work, and can also control different circuits. . What we need to understand today is the type of time relay. The following small series will give you a detailed introduction. What are the classifications of time relay time relays?