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Detection Technology

Non-standard operation of relay protection tester

time:2020/7/21   source:华天电力  reading:728 time

Before the relay protection test of the microcomputer relay protection tester, the operator should analyze the dangerous points, explain the tasks and division of labor, clarify the working place, the status and precautions of the surrounding operating equipment, and check whether the safety measures meet the 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 the wrong interval and wrong operation and maintenance. In the field operation of the substation, the relay protection tester is not allowed to move the switch operating handle, car switch, ground button alarm, alarm bell, return button, trip voltage plate, voltage regulator, voltage switch, etc. When the above equipment needs to be operated due to operation , Must be approved by the relevant operator and operated under the supervision of the operator.

Protection Relay Test Set.png

To maintain important equipment, especially to maintain complex maintenance or trip circuits, during on-site inspection, there must be approved safety technical measures and test plans, and a dedicated person must be supervised.

The maintenance personnel of the relay protection tester must accept and cooperate with the operator when performing the switch transmission test. Otherwise, the relay protection tester personnel must not operate alone. When operating on the maintenance panel and secondary circuit equipment, they should be close to both sides Cover the parts and terminals of the operating equipment with curtains or insulators marked "in operation" to prevent accidents caused by accidental collisions and gas falling. It is strictly forbidden to drill holes on the operation and maintenance panel. In case of vibration or vibration, anti-vibration measures must be taken, and related maintenance should be stopped when necessary.

When the equipment is transported before and after the control panel or the inspection panel or placed above the aisle, sufficient intervals should be maintained to prevent the switch from tripping due to the wrong contact of the operation panel. When working on the equipment operation and partial maintenance shutdown circuit, in addition to disconnecting the tripping pressure plate, the circuit related to the operating equipment that is not controlled by the tripping pressure plate should be disconnected, the bus differential is connected to the fault circuit, and the bus differential is The connection to the faulty circuit must be double disconnected, all disconnected ends should be packaged and recorded, and the recording should be restored after operation.

When checking the secondary circuit or action test of the 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 power-on test of each terminal of the operating equipment should be careful and careful Monitor and maintain the operation and maintenance of false contact, false contact, misconnection, and misplacement. When operating on maintenance or control panels, screwdrivers with less exposed wires must be used to prevent accidental or accidental contact.

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