Safety relay, once we hear this name, we know that it can help us solve the problem of electricity safety. For the principle of safety relays, you may not know much. Then, let Xiaobian and everyone talk about the principle of safety relays. Let's take a look at the role of safety relays.
What is a safety relay? The safety relay is composed of several relays and circuits in order to complement each other's abnormal defects and achieve the complete function of the correct and low malfunction relay, so that the lower the fault and the failure value, the higher the safety factor. Therefore, a variety of safety relays must be designed to protect different grades of machinery, the main goal is to protect the mechanical operators exposed to different levels of danger.
From the working principle, how does the safety relay work? The so-called "safety relay" is not a "no fault relay", but a regular action when a fault occurs. It has a forced guiding contact structure, which ensures safety even in the event of contact sintering. The relays are completely different.
Is the safety relay good? Electromagnetic relays are generally composed of a core, a coil, an armature, a contact spring, and the like. As long as a certain voltage is applied to both ends of the coil, a certain current flows in the coil, thereby generating an electromagnetic effect, and the armature will absorb the pulling force of the return spring against the iron core under the action of the electromagnetic force attraction, thereby driving the armature. The moving contact (normally open contact) is attracted to the stationary contact (normally closed contact). When the coil is de-energized, the electromagnetic suction force also disappears, and the armature returns to the original position in the reaction force of the spring, so that the movable contact and the original static contact are released. In this way, the suction and release are achieved, thereby achieving the purpose of turning on and off in the circuit.
Introduction to the role of safety relayWhat is the role of safety relays? In order to be able to complement each other's abnormal defects, to achieve a complete and low-fault relay function, the lower the error and failure value, the higher the safety factor, so it is necessary to design a variety of safety relays to protect different grades of machinery. The main goal is to protect mechanical operators exposed to different levels of hazard.
What is the function of the safety relay? The role of the safety relay is of course for safety, for safety reasons, such as protection against electric shock, overload, anti-overheating. The solid state relay is a kind of four-terminal device with two terminals as the input terminals and the other two terminals as the output terminals. The isolation device is used to realize the electrical isolation of the input and output.
The thermal reed relay is a new type of thermal switch that uses temperature sensitive magnetic materials to detect and control temperature. It consists of a temperature-sensitive magnetic ring, a constant magnetic ring, a reed switch, a thermally conductive mounting piece, a plastic substrate, and other accessories. The thermal reed relay does not use coil excitation, and the magnetic force generated by the constant magnetic ring drives the switching action. Whether the constant magnetic ring can supply the magnetic force to the reed switch is determined by the temperature control characteristics of the temperature sensitive magnetic ring. It has been found that the safety relay has many functions.
The introduction of the safety relay will be discussed here for the time being. I hope that through the introduction of the principle and function of the safety relay, you can deepen your understanding of the safety relay. Later, everyone can buy a better safety relay, which can handle the problem of electricity safety in the use of household appliances.
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