What’s the ZJ Series Vacuum Pump UnitThe Transformer Vacuum Pump Unit is mainly used to extract gas from the container, so that the container can meet high vacuum requirements, and can also be used for vacuum drying. Especially suitable for vacuum pumping in the substation industry, power supply bur

What's the principle of low-frequency method for measuring the excitation characteristics of current transformers?Excitation characteristic test is the most commonly used and effective method for detecting the performance of protective current transformers.The composite error of current transformers

The DC resistance test of transformer windings is an essential test item for transformers after handover, overhaul, and change of tap changer. The Regulations stipulate that it is necessary to measure the DC resistance of transformer windings during transformer handover, major repairs, minor repairs