The error of current transformers is divided into ratio error and phase angle error:The ratio error is the current value indirectly measured through the secondary circuit (KeI2 minus the percentage of the actual value of the primary current to the actual value of the primary current). That is, the p

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

This week we completed the production for GDVA-405 Automamtic CT PT Analyzer and already arranged the shipment to our customer yesterday.GDVA-405 Automatic CT PT Analyzer is used to measure CT PT(220V-500KV,>2.5VA). The test standards are IEC60044-1,IEC60044-2,IEC60044-5,IEC60044-6,IEC61869,IEEE C57