After the low-voltage machine room is used.

Operation and maintenance procedures for low-voltage equipment in power distribution room of property jurisdiction: 1. Check before operation: 1. 1. Check that there are no sundries inside and outside the power distribution cabinet. 1.2 The surfaces of power distribution equipment and low-voltage equipment are clean and free of dust, with complete components and intact terminals and grounding wires. 1.3 The bus bar is not skewed, the fixing clip is not loose, and the insulation is not damaged. 1.4 if the power failure of low-voltage electrical equipment exceeds 8 hours, the insulation should be shaken first, the bus resistance should not be less than 100 megohm, the contactor and transformer resistance should not be less than 100 megohm, and the secondary line insulation should not be less than 2 megohm before sending. 2. Operation steps of the equipment: 2. 1 Under normal circumstances, the low-voltage single bus runs in sections. 2.2 Incoming switch operation: (a) Check whether the switch components and wiring are normal. (b) If the bus is cut off, check whether each outlet switch is in the off position. (c) After confirmation, swing the switch to the working position, close the platform brake, observe that the bus voltage is normal, and distribute the outlet switch and the capacitor compensation cabinet switch. (d) Power outage operation sequence is opposite to power transmission sequence. 3. Precautions for equipment safety: 3. 1 Electrical components installed in each low-voltage distribution cabinet shall not be overloaded. 3.2 When the bus is out of power due to fault and the reason is not found out, the upper line switch or low-voltage contact switch shall not be closed before the fault point is thrown out. 4. Troubleshooting during equipment operation: 4. 1 If there is discharge sound in the low-voltage cabinet, the relevant departments should be informed immediately, and the power failure should be checked and handled. 4.2 If the three-phase voltage is out of phase or the current transformer is open for the second time, the power shall be cut off in time. 4.3 When tripping occurs during power transmission, find out the reason and deal with it before power transmission. 4.4 If the low-voltage bus and cable are overheated, the secondary load should be pulled down to control the temperature rise, and then the faulty equipment should be checked and the power supply should be cut off. 4.5 When the main bus is out of power, disconnect the incoming switch first, and then disconnect the branch switch. Find out the reason, eliminate the fault point and then send it. 4.6 Find out the reasons for power failure of some equipment, get rid of the fault point and resume power transmission, and then contact the faulty equipment. 5. The key post confirmation system should be operated by more than two people. When operating the incoming switch, it should be operated by two people, one for operation and one for monitoring. Equipment maintenance regulation: 1, equipment electrical schematic diagram: 2, equipment cleaning regulation: 2. 1 The power distribution room is cleaned once a day, and the electrician on duty is responsible for it. 2.2 Low-voltage power distribution cabinets shall be cleaned once every quarter, and the interval shall not exceed 4 months. Equipment that cannot be powered off due to continuous work should be cleaned by making full use of downtime, and the supervisor is responsible for arranging cleaning work. 2.3 It is forbidden to pile up sundries in the transformer room, so that the indoor equipment is free of dust, sludge, dust and water on the ground and the environment is clean and tidy.

3. Equipment inspection regulations: 3. 1 Low-voltage distribution equipment shall be inspected at least once a day, and the electrician on duty shall be responsible for it. 3.2 Inspection route of equipment maintenance patrol: incoming cabinet T, outgoing cabinet T, contact cabinet T, door and window structure T of power distribution room, ventilation facilities 3.3 Inspection contents and standards: (a) Building structure: the roof structure is complete and there is no water leakage; Windows and doors are completely sealed and ventilation facilities are in good condition; There is no water on the ground. (b) Low-voltage distribution cabinet: the structure and frame are not deformed and the foundation is not loose; There is no damage to the components and buses in the cabinet, and all the connecting parts are fastened without overheating and discoloration; Insulator surface and screw surface are clean, without cracks and damage; The meter shows normal. (c) Grounding electrode: The grounding device is complete without damage, corrosion and looseness. 4. Common troubleshooting methods: 4. 1 Regularly use the power outage time to fasten the fixed and connected parts of each power distribution device in time. Loose in operation, should be tightened in case of power failure. 4.2 If the attracting noise of the electromagnetic core is too loud, adjust or polish the contactor immediately. When the auxiliary contact is in poor contact or seriously worn, it should be repaired or replaced in time. 4.3 Overheating of electrical components should be checked and handled in time. 4.4 When the signal lights and indicating instruments fail, they should be replaced or overhauled in time. 5. Safety precautions in equipment maintenance: 5. 1 When an electrical fire occurs, cut off the power supply first, and then use "12 1 1" and dry powder fire extinguisher to extinguish the fire. 5.2 Keep the transformer room airtight and take measures to prevent small animals from entering. 5.3 Without the approval of professionals, no one is allowed to add, subtract or change any components and wiring on the low-voltage distribution cabinet at will. 5.4 When the low-voltage circuit is cut off, a safety sign "Do not work on the platform brake" must be hung on the disconnected switch operating handle. 5.5 When repairing and replacing the components on the low-voltage distribution cabinet, disconnect the power supply.

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Code for use and maintenance of low-voltage equipment in distribution room of property jurisdiction

Code for use and maintenance of low-voltage equipment in distribution room of property jurisdiction

Equipment operation steps:

1, check before operation:

1. 1 Check that there are no sundries inside and outside the power distribution cabinet.

1.2 The surfaces of power distribution equipment and low-voltage equipment are clean and free of dust, with complete components and intact terminals and grounding wires.

1.3 The bus bar is not skewed, the fixing clip is not loose, and the insulation is not damaged.

1.4 if the power failure of low-voltage electrical equipment exceeds 8 hours, the insulation should be shaken first, and the bus resistance should not be less than 100 megohm, the contactor and transformer resistance should not be less than 10 megohm, and the secondary line insulation should not be less than 2 megohm before sending.

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2, equipment operation steps:

2. 1 Under normal circumstances, the low-voltage single bus runs in sections.

2.2 into the line switch operation:

(a) Check whether the switch parts and wiring are normal.

(b) If the bus is cut off, check whether each outlet switch is in the off position.

(c) After confirmation, swing the switch to the working position, close the platform brake, observe that the bus voltage is normal, and distribute the outlet switch and the capacitor compensation cabinet switch.

(d) Power outage operation sequence is opposite to power transmission sequence.