When using the microcomputer relay protection tester, measures for electromagnetic interference protection must be taken.
During the test process in the substation, when replacing electromagnetic-type protection with microcomputer-type protection, the microcomputer relay protection tester must adopt technical measures to prevent electromagnetic interference. That is, strictly follow the installation conditions of the microcomputer relay protection tester and install cables with shielding layers, and ensure that the shielding layers at both ends are grounded. The purpose of this is to prevent voltage and current from being generated at the other end due to electromagnetic interference when the line is long and one end is grounded, causing the microcomputer relay protection tester to fail to operate or malfunction.
To reduce the probability of faults and errors in the relay protection tester, the microcomputer relay protection tester must be optimized in design and use high-quality components reasonably. At the same time, shielding and isolation technologies must be adopted to ensure the reliability of the microcomputer relay protection tester and thereby improve its anti-interference ability.
Daily maintenance methods for the microcomputer relay protection tester:
Daily maintenance of the microcomputer relay protection tester must be strict. Good habits should be formed. After each use, clean, maintain, and power off.
1. Shift operators must conduct regular inspections and checks on the microcomputer relay protection tester. It is particularly necessary to make operation records of the running conditions.
2. Carry out 5S work for the microcomputer relay protection tester. The sorting work must be done by two people to prevent accidental contact with operating equipment. Pay attention to maintaining a safe distance from live equipment to avoid electric shock and secondary circuit short circuits or grounding accidents.
3. Record the current and voltage sampling values of the microcomputer relay protection tester once a week. Record the differential current value for differential protection.
4. Regularly perform infrared temperature measurement on the terminal block of the microcomputer relay protection tester to detect overheating caused by poor contact as early as possible.
5. Regularly check and print the printer of the microcomputer relay protection tester to prevent data loss and losses caused by data loss.
6. Monthly inspection by professionals of the microcomputer relay protection tester to check for faults and errors, and conduct multiple tests to check for accuracy errors and time accuracy. This is convenient for fault analysis after the fault occurs.
Post time: Sep-01-2026