1. According to the working principle or structural characteristics of the relay: 1) Electromagnetic relay: an electrical relay that uses the suction force generated between the electromagnet core and the armature by the current in the input circuit to work.2) Solid state relay: refers to a relay wh... read more
Relay is an automatic switching element with isolation function, which is widely used in remote control, telemetry, communication, automatic control, mechatronics and power electronic equipment, and is one of the most important control elements. Electricity Meter Components Relays generally hav... read more
A relay is an electrical control device. It is an electrical appliance that causes the controlled quantity to undergo a predetermined step change in the electrical output circuit when the change in the input quantity (excitation quantity) meets the specified requirements. It has an interactive relat... read more
How to choose a relay:1. First understand the necessary conditions ①The power supply voltage of the control circuit, the maximum current that can be provided; ②Voltage and current in the controlled circuit; ③How many sets and types of contacts are needed for the controlled circuit. When selecti... read more
Relay test ①Measure contact resistance: Use the electrical barrier of a multimeter to measure the resistance of the normally closed contact and the moving point. The resistance value should be 0; and the resistance value of the normally open contact and the moving point is infinite. From this, it c... read more
Although solid-state relays are not as popular as electromagnetic relays, they are also commonly used electrical devices. They are both relays. What are the differences? Let’s talk briefly today. Electromagnetic relay is an electronic control device, which plays the role of automatic adjustment, sa... read more
1. The role of ordinary shunt resistors Ordinary current transformers can convert a primary current with a larger value into a secondary current with a smaller value through a certain transformation ratio, which is used for protection, measurement and other purposes. For example, a current transfor... read more
The difference between solid state relay and ordinary relay The comparison between traditional relays and solid-state relays is related to many types. The difference between electromagnetic relays and corresponding solid-state relays is explained below: 1. Structural difference: The electromagnetic... read more
It is mainly composed of iron core coil, armature (moving iron core), spring, moving contact, static contact and some terminals. Static contacts include normally closed contacts and normally open contacts. Under normal conditions, the moving contact is closed to the normally closed contact. As long... read more
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