20-350X

Protection relays and systems are an important part of the electric power system. In order to ensure the reliability and safety of power system operation, it is necessary to install various types of protection equipment in the substations for timely protection of equipment and personnel. 20-350X is one of the most common protection equipment used in substations.

20-350X protection relays mainly include two parts. One part is the protection device and the other part is the power system monitoring device. The power system monitoring device is connected to various power system parameters, such as voltage, current, frequency, temperature, pressure, and other parameters, to monitor the normal operation of the power system. The protection device uses a combination of protective relays, such as over-voltage, under-voltage, over-current, and over-temperature relays, to protect the power system from any damage.

The protection device of 20-350X is designed to protect the power system from damage caused by over-voltage, under-voltage, over-current, and over-temperature, which can be used in various application fields. Over-voltage protection device is mainly used to protect the power system from over-voltage caused by transient overvoltage, lightning, or resonance. Under-voltage protection device is mainly used to protect the power system from abnormally low voltage. Over-current protection device is mainly used to protect the power system from excessive overcurrent caused by short circuit or overload. Over-temperature protection device is mainly used to protect the power system from abnormal over-temperature caused by abnormal load current. These protection devices can be used in AC or DC power systems.

The working principle of 20-350X protection relays is simple. Its protection device uses different kinds of protective relays, and the power system monitoring device will continuously monitor the various power system parameters. When an abnormal situation occurs, such as over-voltage, under-voltage, over-current, or over-temperature, the protection device will automatically trip and cut off the power supply to the affected equipment, thus ensuring the safety of the power system.

In conclusion, 20-350X protection relays and systems are used in various application fields and have a simple working principle. The use of these protection relays and systems can ensure the reliable and safe operation of the power system, thus greatly reducing the probability of accidents.