What are the classifications of relay protection testers

The classification of relay protection testers can be done from multiple dimensions, and the following are some of the main classification methods:

1. Classify by test object

① Transmission line relay protection tester: mainly used to test the overcurrent, grounding and other protection devices of transmission lines, ensuring that the transmission lines can be quickly and accurately cut off or isolated in the event of a fault.

② Generator protection tester: used to test differential, low cycle and other protective devices of generators, protecting them from internal and external faults.

③ Transformer protection tester: used to test the differential and low voltage protection devices of transformers, ensuring effective protection in case of faults.

2. Classified by testing principles

① Analog relay protection tester: mainly uses analog circuit technology to test the performance of protection devices by simulating signals such as current and voltage when faults occur. This type of tester was widely used in early power systems, but with the development of digital technology, its application has gradually decreased.

③ Digital relay protection tester: using digital signal processing technology to generate digital signals for testing. This type of testing instrument has the advantages of high accuracy, good stability, and rich functions, and is widely used in modern power systems.

3. Classified by usage method

① Portable relay protection tester: It has the characteristics of being lightweight and easy to carry, suitable for on-site testing and short-term testing. It usually has a smaller volume and weight, making it convenient for staff to carry it to the site for testing.

② Fixed relay protection tester: It has higher stability and accuracy, and is suitable for long-term monitoring and laboratory testing. It is usually installed in a fixed testing environment to provide long-term protection testing support for the power system.

4. Classified by stages of technological development

① Traditional relay protection testers, such as those using OCL amplifiers, have large volume, heavy weight, narrow dynamic range, and low accuracy. This type of tester has gradually been phased out in modern power systems.

② Modern microcomputer relay protection tester: With the rapid development of computer technology, microelectronics technology, and power electronics technology, modern microcomputer relay protection testers have become mainstream. It adopts switch power supply and digital amplifier technology, with small size, light weight, high efficiency, rich functions, and high precision.

5. Classified by phase number

① Three phase microcomputer relay protection tester: suitable for testing three-phase power systems, capable of simulating signals such as three-phase current and voltage for testing.

② Six phase relay protection tester: adds more testing functions and accuracy requirements on the basis of three-phase, suitable for more comprehensive and accurate testing of power systems.

In summary, there are various classification methods for relay protection testers, and users can choose the appropriate tester for testing according to their actual needs. Meanwhile, with the continuous development of technology, the performance and functions of relay protection testers will also be continuously improved and perfected.

ZCAR-1600 microcomputer relay protection tester is developed based on the standards of Technical conditions of microcomputer relay protection test device which was published by electric power department originally, referenced and summarized development and production experience, adopted modern latest new digital technology, high precision electronic parts, micro system with new circuits and new structure.It Can independently complete test of microcomputer protection, relay protection, excitation, measurement, fault recording and other professional fields tests, widely used in electric power, petrochemical, metallurgy, railway, aviation, military and other industries of scientific research, production and electrical test site.

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