The essential difference between the relay and the contactor is that the load is different. The current capacity is large for the contactor, the small is the relay, and the contactor for the main circuit and the relay for the control circuit are used.The function of the contactor is to switch on an... read more
Relays are used in all kinds of circuits. Relays are no stranger to our lives, but the use of relays may make us a little helpless, because there are many types of relays, and there are many types of relays.Commonly used relays:1. According to the principle of operation: electromagnetic type, induc... read more
The relay has a four-leg relay and a five-leg relay. Let's talk about the four-leg relay. First find out which of the four pins of the car relay are the coils, and which two are the contacts that are connected as shown. The two pins are insulated between normally open contacts 3 and 4. The other tw... read more
The same brand, different models of automotive relays use different operating voltages. Automotive relays are divided into 12V and 24V. 24V cars are usually equipped with two batteries, cars are generally 12V, trucks and trucks are generally 24V. Different brands, even the same brand, different mod... read more
For automotive relays that can be energized for a long time, different people have different answers, which tests the understanding of automotive relays. Some people say that they can't be powered for a long time. Long-term power-on will burn out the car relay. Some people say that they can be powe... read more
The comparison between traditional relays and solid state relays, due to the variety of types involved, the following comparison of electromagnetic relays with the corresponding solid state relays to illustrate their differences: 1. Structural difference: The electromagnetic relay works by the... read more
Measuring contact resistanceUse the resistance file of the universal meter to measure the normally closed contact and the dynamic point resistance, the resistance value should be 0, (the contact resistance value can be measured within 100 milliohms in a more precise way); and the normally open cont... read more
Electromagnetic relays are a common type of electrical equipment in industrial circuits. Many people who choose electromagnetic relays do not understand very well. There are many questions about how to choose good electromagnetic relays. How to choose electromagnetic relays?1. Select the rated work... read more
1. Signal relayThe signal relay is a commonly used device in the automatic control system. It is generally used to turn the circuit on and off. It releases the control command and reflects the status of the device by dropping the card. After the device returns to normal, the signal is released by t... read more
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