The tester is a new intelligent testing instrument. Previous relay protection test tools were mainly composed of voltage regulators and phase shifters, which were bulky and had low accuracy, and could no longer meet the calibration work of modern microcomputer relay protection. With the continuous development of science and technology, microcomputer relay protection has been widely used in line protection, main transformer differential protection, excitation control and other fields. Comprehensive automation of substations has become the mainstream. The portable design is suitable for field use.

The tester simplifies operation while increasing the instrument's functions, enabling various calibrations for common relays and the panel layout

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