The oil immersed transformer operates under high load. Once the critical temperature is exceeded, the transformer will start the "Self-protection" process and automatically trip. If the transformer is still in operation, it will cause damage and large-scale power failure. Once such an accident occurs, it is difficult to repair in…

Transformer is a very important part in power engineering construction. We often hear dry-type transformer (referred to as dry transformer) and oil immersed power transformer (referred to as oil transformer). What is the main difference between dry-type transformer and oil immersed power transformer in power engineering construction? What are their…

In actual use, if the live equipment is overheated, it may be caused by the following points.1. Core heating: insulation damage or long-term overvoltage, eddy current loss and hysteresis loss of transformer and motor and other equipment will lead to core heating of transformer and motor, which is easy to…

As we all know, in order to ensure the safety of the circuit during the operation of the power system, it is necessary to set the grounding. This ensures that after the circuit receives the internal overvoltage or lightning overvoltage, the current can find a safe distribution path to the…

The transformer DC resistance tester is subdivided into 1A , 3A, 5A, 10A, 20A, 40A, 50A, 100A and other specifications. The instrument power supply is divided into external power supply AC220V, internal power supply (battery power supply), AC and DC power supply. At present, the DC resistance testers above 10A on…

High voltage cable is a kind of power cable, which refers to the power cable used to transmit 1kV to 1000kV. It is mainly used for power transmission and distribution. The components of the high-voltage cable from the inside to the outside include: conductor, insulation, inner sheath, filler (armor) and…

1. Circuit overloadCircuit overload is one of the main reasons for the frequent tripping of circuit breakers. This happens when you want a particular circuit to provide more power than its actual capacity. This will cause the circuit to overheat, putting all electrical appliances connected to the circuit at risk.2.…

The DC high-voltage generator developed and produced by Kvtester can conduct DC high-voltage tests on high-voltage electrical equipment such as zinc oxide arresters, power cables, transformers, generators, etc. It is a kind of equipment used by some power testing departments, such as mines, metallurgy, steel, electric power, etc. It adopts…

Wires and cables are the focus of inspection by relevant departments. Many friends may have questions. Why? Because wires and cables are products that can affect personal and property safety. Wires and cables are also regularly checked by special staff. If a fault is found, it is necessary to quickly…

Loop resistanceLoop resistance is also a kind of resistance value, which is the main technical parameter to evaluate the performance of conductive loop system. When its value is within the normal range, it is a parameter that can characterize the normality of the conductive circuit. For different data, each type…