What are the types of current relays? How to judge good or bad

What are the types of current relays? A current relay consists of an electromagnet and contacts. When an electromagnetic iron is energized, a magnetic field is generated, which promotes contact closure or breakage, and then controls the current level in the circuit. There are various types of current relays, and different types of current relays have different characteristics and applications. This article will introduce the types of current relays and how to determine the quality of current relays.

1. Type of current relay

1. Universal current relay

Universal current relay is the most common current relay, with the characteristics of compact structure, convenient use, high-quality and affordable. The main drawbacks of universal current relays are high circuit resistance, short cycle time, and slow switching speed.

2. Stable current relay

Stable current relay is a type of current relay with high accuracy, sensitivity, and reliability. The main characteristic of a stable current relay is its ability to maintain a stable output current within a range, suitable for places where high-precision current must be operated.

3. Time current relay

Time current relay is a type of current relay that can adjust circuit switches based on time delay. The main application of time current relays is in places where circuits should be controlled in a certain order.

4. Voltage and current relay

Voltage current relay is a type of current relay that can adjust circuit switches based on voltage size. The main application of voltage and current relays is in places where circuit switches are operated based on voltage dimensions.

5. Power current relay

Power current relay is a type of current relay that can adjust the circuit switch based on the power level of the circuit. The main application site of power current relays is where circuit switches should be operated based on the power level of the circuit.

2、 How to judge the quality of current relays?

1. Appearance inspection

Firstly, conduct a visual inspection to see if there are any deformation, cracks, oxidation or other issues with the current relay. Once these issues are discovered, it indicates that the current relay has been damaged and needs to be replaced.

2. Check electrical parameters

Before conducting electrical parameter checks, understand the rated current, rated voltage, maximum power, and other parameters of the current relay. Then use testing equipment such as a multimeter to test the electrical parameters of the current relay and check if it meets the requirements.

3. Stability check

Stability is an important indicator of current relays, which reflects the characteristics of current relays under stability. Stability check can be connected to the current relay in the load circuit, and then check whether the parameters such as current, voltage, and power meet the requirements.

4. Dynamic verification

Dynamic is another important indicator of current relays, which reflects the characteristics of current relays under dynamic working conditions. Dynamic inspection can be connected to the current relay in the load circuit, and then dynamic inspection of parameters such as current, voltage, and power can be carried out to check whether they meet the requirements.

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