Three-phase microcomputer relay protection tester before the relay protection test. The operation management personnel should analyze the dangerous points, explain the tasks and division of labor, clarify their working hours and locations, the status and precautions of the surrounding operating system equipment, and check whether the safety technical measures meet the design requirements.

Before moving the equipment, the on-site commissioning personnel must check whether the equipment name is consistent with the equipment name on the operation ticket, and pay attention to interval errors and operation and maintenance errors. When operating on site, the relay tester allows moving the switch operating handle, automatic switch button ground alarm, bell, return button, trip voltage plate, regulator, and voltage switch. When the above equipment needs to be operated due to operation, it must be approved by the relevant operator. And operate under the supervision of the operator.

Maintain an important technical equipment, especially the maintenance of complex maintenance or trip circuits in the society. On-site inspections and safety technical measures must be approved and pilot programs, and designated personnel to supervise them.

When the maintenance staff of the three-phase microcomputer relay protection tester can carry out the control switch transmission test, they must accept and cooperate with the operation management personnel. Otherwise, the personnel of the three-phase microcomputer relay protection tester shall not operate alone. When operating on the maintenance panel and secondary circuit equipment, cover the parts and wiring terminals of the equipment running on both sides with curtains or insulators marked "in operation" to prevent accidents caused by accidental collisions and gas falling. Drill holes in the operation and maintenance panel. When drilling or vibrating plates in the vicinity of operation and maintenance are required, anti-vibration measures must be taken. When necessary, the maintenance of work-related information should be stopped.

When the device is placed in the conveying channel or before and after the control panel or the access panel, adequate space should be maintained. Prevent the switch from tripping due to accidental contact of the operation panel. When the equipment is running and partly overhauled and working on the shutdown control circuit, except for disconnecting the trip pressure plate. Circuits related to operating equipment not controlled by the trip pressure plate should also be disconnected. The connection between the bus differential and the fault circuit, and the connection between the bus differential and the fault circuit must be double-disconnected, and all disconnected ends should be encapsulated and recorded. And restore the record after the operation.

When checking the secondary circuit or action test of the three-phase microcomputer relay protection tester, check the breaking position of the trip circuit and the start circuit pressure plate related to the secondary circuit of other operating equipment. The wiring, wiring or energization test of each terminal of the operating equipment should be checked. Monitor carefully and carefully. And maintain the operation and maintenance of false contact, false contact, misconnection and misplacement. When maintenance operations or control panels, bare-wire screwdrivers must be reduced to prevent accidental or unintentional contact.