(1) Working process
    Preparation work
    Prepare a sufficient number of tools and materials, 1 pliers, 2 brushes, 2 steel brushes, 1 sandpaper, 1 file, 1 mobile power box, 1 hair dryer, and a number of rags.
    2. Working process
    (1) Appearance inspection: The appearance of the screen, cabinet and box is intact, the external temperature is normal, and the grounding is good; the meter and indication signal are correct, the small switch position is correct, and there is no abnormal signal.
    (2) The external AC temporary power supply should be connected to the temporary power supply from the lower port of the power supply box air switch, and must not be connected to the power supply in the terminal box AC ring network.
    (3) Clean and clean.
    (2) Precautions
    (1) The external temporary power supply shall be carried out by two persons, one person shall be operated, one person shall be supervised, and the person in charge of the duty shall agree. The operator shall wear the line gloves, which shall be connected to the neutral line and then the phase line (removed oppositely), and take care to prevent Short circuit or ground.
    (2) Do not use a hair dryer with a metal casing.
    (3) The brush handle should be insulated and the metal part of the handle should be wrapped with insulating tape.
    Second, regular switching
    (1) Management regulations
    State Grid (2006) No. 512 "Substation Management Code" D.2.11 Transformer for standby station in substation (once without electricity) should start the test once a year, the test operation method is listed as the on-site operation procedure; the station transformer for long-term non-operation It should be powered for a period of time each year.
    (2) Working principle
    Substation power supplies generally have two basic power supply modes.
    The first type is the bus-segment power supply mode shown in Figure 3-16-1. The bus-coupled circuit breaker is disconnected, and the two working power supplies are respectively powered. The two power supplies are mutually standby.
    The second type, as shown in Figure 3-16-2, is a dual-input single-bus power supply mode, that is, one working power supply and the other power supply is standby.
    (3) Operation process
    1. Preparation for operation
    (1) Familiar with and master the "Substation Management Code"; State Grid Corporation "18 major power grid major anti-accident measures"; DL/T 969-2005 "Substation Operation Guide".
    (2) Prepare an operation ticket.
    2. Operation process
    (1) The power supply system of the checkpoint power system is automatically put into operation.
    (2) Disconnect the transformer for the station's power system operation station.
    (3) Check if the 380V standby power automatic throwing device is operating correctly, the indicator light indicates normal, and the station power system is operating normally.
    (4) Check if the standby station uses the transformer to vote properly.
    (5) Resume the normal operation mode of the station power system.
    (four) matters needing attention
    (1) If there is a standby power supply automatic investment device for the station, it should be put into operation, and the operator should periodically switch the test once every half month.
    (2) All low-voltage AC fuses shall have specification information (listed in the supplementary section of the substation field operation procedures), and the fuse casing and fuse placement site shall be marked with specifications.
    (3) The two-station transformers of the same power supply should not be operated in parallel. The two stations of different power supplies are prohibited from running in parallel.
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