The relay protection tester under UHV power can help many power workers conduct various power tests more conveniently.
Relay protection is a very important test in power system testing. It can detect faults or abnormal situations in the power system, issue alarm signals, or serve as an important measure for directly isolating and eliminating faulty parts. The commonly used instrument in relay protection work is the microcomputer relay protection tester.
During its development, it used relays with contacts to protect the power system and its components (generators, transformers, transmission lines, etc.) from damage, hence also known as relay protection.
There are also many types of relay protection, including current protection, distance protection, differential protection, longitudinal protection, gas protection, etc. What is overcurrent protection like?
Overcurrent protection is a protection method that activates the protective device when the current exceeds a predetermined peak value. It mainly includes two types: short-circuit protection and overload protection. Short circuit protection has the characteristics of high setting current and instantaneous action. The characteristics of overload protection are mainly reflected in its small set current and inverse time limit action.
Electromagnetic current release devices (relays) and fuses are commonly used as short-circuit protection components in short-circuit protection. Delay electromagnetic current relays are commonly used as overload protection components in overload protection.
Overcurrent protection can handle faults of different types and situations. The overcurrent protection switch is set at each level, selectively cutting off some lines according to the current size, position, duration, etc. In fact, it operates through three characteristics: inverse time limit characteristic, definite time limit characteristic, and quick break characteristic.
By combining these three types and installing them in different locations, current, time, and segmented line protection can be achieved.
In addition to different methods of relay protection, computer-based relay protection testers also vary. There are three types of this tester: multifunctional, comprehensive, and ordinary. Their functional characteristics are different, and the tests implemented are also different. Mainly developed for different practical testing projects, allowing consumers to choose a suitable microcomputer relay protection tester through various methods.