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Holding relay

Holding relay is an electronic control device. When the input (such as voltage, current, temperature, etc.) reaches the specified value, the electrical appliance that makes the controlled output circuit turn on or off.

Description

Theory:Electromagnetic Relay
Usage:smart meter
Size:Miniature
Protect Feature:Sealed
Contact Load:Low Power
Contact Material:AgSnO2

Definition

Holding relay is an electronic control device. When the input (such as voltage, current, temperature, etc.) reaches the specified value, the electrical appliance that makes the controlled output circuit turn on or off.

Features

◇ 5A two sets of contacts switching capability

◇ 10A contact switching capability

◇ Only impulse excitation needed, both for single and double coil.

◇ Low power consumption, small in size

◇ Samll in size, PCB type installation

Function and role

Electromagnetic relays are generally composed of iron core, coil, armature, contact reed, etc. As long as a certain voltage is applied to both ends of the coil, a certain current will flow through the coil, thereby generating electromagnetic effects, and the armature will attract the iron core against the pulling force of the return spring under the action of electromagnetic force attraction, thereby driving the armature. The moving contact and the static contact (normally open contact) attract. When the coil is de-energized, the electromagnetic suction will also disappear, and the armature will return to the original position under the reaction force of the spring, causing the moving contact to attract the original static contact (normally closed contact). This pulls in and releases, thus achieving the purpose of turning on and off in the circuit. The “normally open, normally closed” contacts of the relay can be distinguished in this way: the static contacts that are off when the relay coil is not energized are called “normally open contacts”; the static contacts that are in the on state are called It is “normally closed contact”.

Principle

When the input (such as voltage, current, temperature, etc.) reaches the specified value, the electrical appliance that makes the controlled output circuit turn on or off. Can be divided into two categories of electrical (such as current, voltage, frequency, power, etc.) relays and non-electrical (such as temperature, pressure, speed, etc.) relays. It has the advantages of fast action, stable operation, long service life and small size. Widely used in power protection, automation, sports, remote control, measurement and communication devices.

A relay is an electronic control device that has a control system (also called an input loop) and a controlled system (also called an output loop). It is usually used in automatic control circuits. It actually uses a smaller current to control a larger one. An “automatic switch” for current. Therefore, it plays the role of automatic adjustment, safety protection and conversion circuit in the circuit.

Application

Power protection automation

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