Mastering some basic fault handling methods can not only ensure the safety of power consumption, but also reduce unnecessary losses and create benefits for power users. Let's share several common tripping faults, hoping to help you.
1 light gas alarm
Quickly come to the cabinet and press the reset switch. If the alarm can not be eliminated, you should immediately check with relevant personnel whether the light gas of the gas relay of the transformer acts. If it acts, it indicates that there is gas in the transformer.
Cause: generally, there are three possibilities: one is internal failure, the other is lack of oil, and the third is that the gas is not discharged after refueling.
Treatment method: open the vent valve, after the gas is completely discharged, tighten the valve, and press the reset switch before returning to the cabinet to eliminate the fault signal.
2 heavy gas trip
Check whether it trips or not, and focus on the operation indicator and integrated display.
If it trips, it means that there is a big internal fault in the transformer of the cabinet, such as coil turn to turn short circuit or serious oil shortage.
Treatment method: the dispatcher and relevant leaders shall be informed immediately to find out the real cause, and the dispatcher and production unit shall be informed after the fault treatment, and the power supply and test run shall be conducted.
3 single phase earth trip
Inform the dispatching and production units that the equipment of the cabinet has one phase grounding, find out the grounding part, make effective treatment, report the grounding part, make effective treatment, report the dispatching, and ask for power transmission and test run.
4. Secondary circuit disconnection of voltage transformer
One is that the control circuit breaker is not in the closed position, and the other is that the control circuit head is loose.
Processing method: close the switch, fasten the terminal, press the reset switch to eliminate the fault signal. 5. Under voltage trip
After receiving the alarm, quickly come to the cabinet to check whether it trips.
Treatment method: in case of tripping, the dispatcher shall be informed immediately to explain that the network voltage is too low, and the superior power station shall be contacted to find out the cause. After handling the fault, the dispatcher shall be asked to send power for test run.
6 quick break trip
If the monitoring screen shows quick break trip.
Treatment method: you should quickly come to the cabinet to check whether the switch is jumping (see the indicator light and the opening and closing indicator board of the circuit breaker).
In case of tripping, it is necessary to report to the dispatcher immediately to explain that there is a major fault in the line or equipment, and then check where there is a fault in the line (which may be short circuit between phases or grounding) and equipment (which may be a major fault in the transformer). After finding out and handling the fault, the dispatcher shall be informed to ask for power transmission and commissioning.
7 over current trip
There are two main reasons, one is the line and equipment failure, the other is overload.
Treatment method: if it is the first cause, it shall be treated according to the method of solving the quick break trip fault. If it is another cause, it shall immediately notify the dispatcher and relevant personnel. Find out the cause of overload to see if it is really overload, or the motor and transformer are faulty. After checking and handling, inform the dispatcher and ask for power transmission and test run.
In the above cases, if there is no trip, it belongs to the signal circuit false alarm. Check the signal secondary circuit, fasten the relevant secondary line, and press the reset switch to eliminate the fault signal. Thank you for reading, hope the above content is helpful to you, if you want to know more wonderful content, please click our official website: MNS low voltage drawer cabinet .