Relay maintenance is the general name of relay protection technology and relay maintenance equipment.

Relay protection technicality is a detailed electric power technology thought system. The key is composed of power grid fault analysis, relay maintenance principle and persistence, relay maintenance equipment design scheme and relay maintenance operation and maintenance technicality.

Relay maintenance equipment is the key of relay maintenance function, that is to say, it can reflect the fault or abnormal operation of electrical components in the power grid, and act as a maintenance equipment to trip the barrier switch or send out signals. In high voltage switch cabinet, metal material meter box and other complete sets of electrical equipment, people generally call it automotive relay. Today, the key of metal material Distribution Box manufacturer introduces the main use and classification of relay maintenance equipment in detail.

The application scope of relay maintenance equipment includes:

1. When the maintenance of the transmission line or electrical components fault, the relay maintenance equipment fast attitude, make the barrier switch trip, part of the fault bear power supply system removed, to minimize the level of damage, and ensure that the non fault part of the normal operation again.

2. When the maintenance of transmission lines or electrical components abnormal all normal working attitude, the relay maintenance equipment will send a signal to inform the operators to adopt effective countermeasures (refer to the solution to the problem).

What are the classification of relay maintenance equipment

1. According to the maintenance target, it is divided into transmission line maintenance, generator maintenance, transformer (standard air pressure independent variable) maintenance, motor maintenance and bus maintenance, etc.

2. According to the basic principle of maintenance, it is divided into current maintenance, operation voltage maintenance, distance maintenance, differential maintenance, azimuth maintenance and zero sequence maintenance.

3. According to the types of maintenance problems, it can be divided into two color short-circuit fault (the current is not through high-power electrical appliances, immediately connected to the switching power supply) maintenance, grounding equipment fault maintenance, turn to turn short-circuit fault (the current is not through the high-power electrical equipment, immediately connected to the switching power supply), relay maintenance, out of step maintenance, loss of excitation maintenance and over excitation maintenance.

4. According to the technical nature of relay maintenance equipment, it can be divided into mechanical and electrical engineering maintenance (such as electromagnetic induction maintenance and magnetic induction maintenance), transformer type maintenance, triode type maintenance, integrated circuit chip maintenance and micro model maintenance.

5. According to the effect of maintenance, it is divided into leading maintenance, storage maintenance and assistance maintenance.

In fact, the relay maintenance equipment does not know that it can be used for maintenance in high-voltage switchgear, but also for the maintenance of transmission lines. Generally, the relay maintenance in high voltage switch cabinet and metal material meter box is called automobile relay.