The structure and working principle of the electromagnetic relay are similar to those of the contactor, and are mainly composed of an electromagnetic mechanism and a contact. Electromagnetic relays are also available in both DC and AC. The suction and release values of the relay can be adjusted wit... read more
What is a general-purpose relay? General-purpose relay is a relatively abstract concept in physics. Many people may not understand what a general-purpose relay is. The relay is usually used in an automatic control circuit. It actually uses a small current to control high-current operation. An "auto... read more
Relays have solid-state relays and mechanical relays. What is the difference between these two relays? Electromagnetic relays and solid-state relays are not afraid of earthquakes; the former are afraid of magnetism and the latter are afraid of induction; one is low and the other is high; one is low... read more
The car relay is hot. From the perspective of physics, it is a process in which mechanical motion generates heat and mechanical energy is converted into heat. This is a normal phenomenon. This is also the reason why radiators are installed in many machines. When a large amount of heat is generated ... read more
1. First understand the necessary conditionsa. control circuit power supply voltage, the maximum current that can be provided;b. voltage and current in the circuit being controlled;c. The controlled circuit needs several sets and what forms of contacts. When a relay is selected, the power supply vo... read more
1. Introduction to magnetic latching relaysThe magnetic latching relays is also a kind of relay, but it has more stable performance than other relays, and has a smaller volume and a stronger carrying capacity. The magnetic latching relays is essentially an automatic switch that can automatically tu... read more
In industrial control lines and current home appliance control lines, there are often intermediate relays. For different control lines, the role of three-phase relays is different. The functions of the intermediate relays are common in the following ways:1. Replace the small contactorThe contacts o... read more
To make it easier to understand, we divide the circuit into two parts, a low voltage (small current) circuit and a high voltage (high current) circuit. In the figure, the power supply, the switch S1, and the coil are low voltage circuit parts; the contacts, the load power supply, and the consumer a... read more
We should all know the role of the relay. As long as a certain voltage is applied across the coil, a certain current will flow in the coil, which will produce an electromagnetic effect. The armature will overcome the tension of the return spring under the action of electromagnetic attraction. To th... read more
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