1. Definition and Overview
The three-phase relay protection tester, also known as microcomputer relay protection instrument, relay protection tester, relay protection tester, etc.,
is a new type of miniaturized microcomputer relay protection tester developed based on the "Technical Conditions for Microcomputer Relay Protection
Test Devices" issued by the former Ministry of Electric Power, combined with modern advanced microelectronics technology and devices. It can independently
complete device tests in professional fields such as microcomputer protection, relay protection, excitation, metering, fault recording, etc., and is widely used in
scientific research, production and electrical test sites in industries such as power, petrochemical, metallurgy, railways, aviation, and military.
2. Functions and Features
Powerful functions: The three-phase relay protection tester can perform a variety of tests, including three-phase current amplitude test, three-phase current angle test,
three-phase voltage amplitude test, three-phase voltage angle test, three-phase power test, protection function test, fault simulation test, fixed value setting test,
and data analysis test. These functions enable the tester to comprehensively evaluate the performance and reliability of relay protection devices.
High precision: The tester uses high-precision electronic devices and digital signal processing technology to ensure the accuracy and reliability of test results.
Flexible and convenient: The tester adopts an advanced structure that can be operated independently or connected to a laptop. It is small in size, light in weight,
and easy to carry and operate. At the same time, it also has a large-screen LCD display and a rotating mouse controller, making the operation more intuitive and convenient.
Safe and reliable: The tester fully considers safety factors during the design and manufacturing process, and has perfect protection functions and anti-interference
capabilities. In addition, it also provides a reliable grounding terminal to ensure safety during use.
3. Precautions for use
When using a three-phase relay protection tester, pay attention to the following matters:
Power on and off sequence: When turning on the power switch, turn on the power switch first, then turn on the power amplifier switch; when shutting down,
turn off the power amplifier switch first, then turn off the power switch.
Reliable grounding: The tester should be reliably grounded to ensure safety during use.
Pay attention to wiring: When using live contacts, the + end of the DC power supply must be connected to the common end (N), and pay attention to the correct wiring.
Avoid interference: If the device under test is at the operating site, the current transformer (CT) and voltage transformer (PT) circuits on site should be untied from the
protection equipment to prevent the tester from being strongly interfered and unable to test correctly.
Pay attention to ventilation: When using the tester, do not block or close the vents of the machine body to ensure good heat dissipation.
4. Summary
The three-phase relay protection tester is an indispensable and important test instrument in the power system. It has the characteristics of powerful functions, high precision,
flexibility, convenience, safety and reliability. By using this tester, the performance and reliability of the relay protection device can be comprehensively evaluated to ensure the safe and stable operation of the power system.
