Bus fault signs are bus protection action (such as mother, etc.), switch tripping and failure caused by sound, light, signal and so on.
When the bus fault power outage, on-site duty personnel should immediately to the power outage of the bus to carry out external inspection, and the results of the inspection promptly report on duty dispatcher, on duty dispatcher according to the following principles to deal with:
1, do not allow the failure of the Busbar inspection should be strong power transmission, in case of expansion of accidents.
2, to find fault points and can be quickly isolated, after the isolation of the fault point should be quickly to the power outage bus restoration, when conditions should be considered with external power supply to the power outage bus, the joint route to prevent non-simultaneous closing.
3, to find fault points but can not be quickly isolated, if the double busbar in a group of bus fault, should be quickly on the fault bus components on the inspection, confirmed that no fault, cold to run the bus and restore power, the joint route to prevent non-simultaneous closing.
4, after the inspection can not find the point of failure, the application of external power supply to the fault bus test transmission. Power Plant bus failure, such as power supply, can be 0-step bus boost, generally do not allow power plants with the power supply to the fault bus test transmission.
5, a group of bus faults in the double busbar, with the generator on the fault bus 0 up, or with the external power supply to the fault bus test, or with the external power supply to the bus has isolated the fault point of the first power, you need to pay attention to the operation of the mother difference protection, if necessary, stop using the mother difference protection.
6, 3/2 wiring of the bus failure, after inspection can not find fault points or find fault points and has been isolated, you may use the power of this station test transmission. Test switch must be intact, and have complete protection of the relay, the mother differential protection should be sufficient sensitivity.
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