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        Power distribution unit is a little test methods
        Date:[2011-12-10 14:15:34]
        Distribution equipment to determine the charged state of the electrical equipment is energized, the following methods can be used to determine: 1. A clear break point of the switch, or switch from the sub-gate is a clear distinction between state power for oil circuit breakers, can be from the operating mechanism of the signs seen on its physical location, and sometimes caused by loose signs indicate errors related to the isolation switch should be combined to determine 2 from the voltage meter can determine the direction of electrical equipment is energized, but pay attention to instrumentation whether the failure, the wiring is correct, to avoid false judgments. 3 displays from signal leakage circuit breakers and electrical equipment to determine whether the charged 4. electroscope or Shi Dianbi with direct testing, but electroscope or Shi Dianbi voltage levels must be with the test electrical equipment or line voltage circuits. Third, inspection and testing before the high transmission, low voltage electrical equipment inspection and testing should be carried out the following: 1. for high and low voltage electrical equipment and insulating oil pressure test. 2. measurement insulation resistance of each component, check the phase is correct. 3 check the contact exposure is good, all the action on and off switch are correct 4. fuse melt compliance. 5. power protection device action is normal, interlock device is reliable. 6. grounding device is to meet the requirements. 7. signal and indicating devices of the display is correct, the DC system is reliable. 8 safety equipment and fire equipment are complete. four , bus inspection 1 cleaning dust and dirt on the bus. 2 bus insulation resistance measurements, the general 0.4kV bus insulation resistance should be not less than 10MΩ; 6 ~ 10kV bus shall not be less than 200MΩ. 3. check the bus is full non-destructive, fastening it securely, without damage to observe the phenomenon of insulator 4. check the connection is good exposure. 5 check whether the peeling paint on the bus, mini circuit breaker in the maintenance of color to eliminate paint or wax temperature display, should be supplement and complete. 5.2.1.2 distance from a power distribution unit, high voltage distribution equipment outside the allowable distance outside the main high voltage power distribution equipment separation distances should not be less than the value listed in the table below.
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