The items of field inspection of microcomputer relay protection tester are:
(1) Measure insulation
(2) Test the inverter
(3) Check whether the curing procedure is correct
(4) Test the accuracy and balance of the data acquisition system.
(5) Check the switching input and output loop
(6) Check the list of fixed values
(7) Whole group inspection
(8) Test with primary current and working voltage
According to the minimum impedance of each bus in the system, check whether the linearity of microcomputer relay protection tester can meet the requirements of the system. Special attention should be paid to the relationship between the secondary resistance of the current converter, the proportional coefficient of current and the linearity of the microcomputer relay protection tester.
The instruments and meters used for inspection shall be managed by special personnel, and special attention shall be paid to moisture-proof and shock-proof, and the errors of instruments and meters shall be within the specified range. Before use should be familiar with its performance and operation method, the use of precision instruments generally should be monitored.
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