Principle of magnetic retaining relay
- May 06, 2018 -

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1. Principle of magnetic retaining relay -- Brief Introduction

Magnetic relays are also a kind of relay, but they have more stable performance than other relays, a smaller size, a stronger bearing capacity, and so on. The magnetic holding relay is essentially an automatic switch that can automatically connect or disconnect the circuit. It usually relies on the magnetism of a permanent magnet to maintain a stable state. If the state needs to be converted, it only needs to be stimulated by a pulse signal.


Two. Principle of magnetic retaining relay

The contact of the magnetic holding relay is in a stable state by the magnetic effect of the permanent magnet. If the switch state of the contact is needed, only the DC pulse voltage of the coil is required. As shown in Fig. 1-4, the conversion of the magnetic latching relay from "reset" to "set" is perfectly displayed.

Three. The principle of magnetic retaining relay -- contact form

The rectangle box is used to represent the coil of the relay, and the symbol "J" is marked beside it. The contacts of the relay have two forms of expression in the circuit: one is to draw the contacts on one side of the rectangular frame, and the other is to draw the contacts in their respective control circuits and to mark the difference with the character symbols.


Four. Principle of magnetic retaining relay -- Selection

In the selection of magnetic latching relay, three factors need to be considered. The first is to control the current and voltage provided by the circuit to meet the demand for the relay to the voltage and current; secondly, it needs several sets of contacts and forms of contact, considering the size of the existing relay, and the third is the volume of the appliance, and the installation and layout of the circuit board is considered.