Possible causes of light gas movements; Tabbing Copper Strip Machine,Interconnection Copper Strip Machine,Photovoltaic Interconnection Copper Strip Machine,Copper Strip Annealing Machine Jiangsu Lanhui Intelligent Equipment Technology Co., Ltd , https://www.lanhuisolar.com
a) The filter oil, fueling or cooling system is not tight enough, so that air invades the transformer.
b) The oil level is lowered due to temperature drop or oil leakage.
c) A small amount of gas is generated due to internal faults in the transformer.
d) Secondary circuit fault false signal.
e) Caused by a through short circuit.
Inspection after light gas protection action:
a) Perform external inspection on the transformer, whether the oil level and oil temperature are normal, whether there is abnormal oil leakage or fuel injection, whether there is any maintenance personnel working, and whether the meter has changed or not, and strengthen the monitoring of the transformer.
b) Check whether the gas relay is filled with oil. If there is gas in the gas relay, record the gas volume, identify the color of the gas and whether it is flammable, and take the gas sample and the oil sample for chromatographic analysis. If the gas in the gas relay is colorless, odorless and flammable, and the chromatographic analysis judges air, the transformer can continue to operate. If the gas is flammable, the chromatographic analysis exceeds the normal value, and it is judged by routine test. If it is determined that there is a fault inside the transformer, the transformer must be stopped to analyze the cause of the action and conduct an inspection test.
c) If the signal action is caused by the remaining air in the fuel tank, or the strong oil circulation system takes in air, and the signal action interval is shortened one by one, it will cause a trip, if there is no spare transformer, the factory chief engineer (or deputy chief engineer) ) Agree to change the signal to heavy gas, and immediately identify the cause to eliminate it. If there is a spare transformer, the standby transformer should be reversed. It is not allowed to change the operating voltage of the transformer in operation to the signal position.