What are the Magnetic Circuit Failures of Transformers? 1.If the insulation pad on the wear heart screw crushed or wear heart outside screw bandage insulation is too thin, plywood and core insulation board is too thin or have crack, is likely to cause heart...
What are the Possible Failures of Tap Switches? 1. No excitation tap switch failures 1) Insufficient contact spring pressure, uneven roller pressure to reduce the effective area, silver coating wear, contact with mud, resulting in poor contact switch, resulting in burns. 2) Poor contact of...
What are the Transformer Lead Failures? 1. The joint is not welded securely or the screws on the joint are not tightened, local overheating or even joint meltdown causes wire breakage. 2. The lead and the fuel tank or lead phase distance is insufficient,...
What are the Differences Between Main Transformer Differential and Gas Protection? 1.The main transformer differential protection is designed and manufactured according to the principle of circulating current, and the gas protection is designed and manufactured according to the characteristics of gas generated or decomposed when...
What are the Installation Requirements for Distribution Boxes? 1.Distribution box application of non-combustible materials; 2.Open distribution board can be installed in production places and offices with small electric shock risk; 3.In the danger of electric shock or poor working environment of the processing workshop, casting,...
How to Deal with PT Disconnection Fault? For voltage transformer circuit disconnection, the following three steps should be taken to deal with it: (1)According to the relevant provisions of relay protection and automatic device, exit the relevant protection to prevent misoperation; (2) Check whether the high...
What are the Characteristics of PT Disconnection? PT disconnection can generally be divided into PT primary side disconnection and secondary side disconnection. No matter which side of the disconnection, the voltage of the secondary circuit of PT will be abnormal. When the PT primary...
Frequency Converter Protection Function (1) Automatically correct the abnormal state after detection, such as overcurrent stall prevention, regenerative overvoltage stall prevention. (2) After detecting the abnormality, block the PWM control signal of power semiconductor device to make the motor stop automatically. Such as over...
