Mid-May, we received an order from our regular customer. The order includes GDGK-306A Circuit Breaker Analyzer,GDHL-200A Circuit Breaker Contact Resistance Tester and GDJB-PC Three Phase Relay Protection Tester. We have completed the production last Friday. Yesterday we already shipped them to custo

The test items for power transformers shall include the following:1. Insulating oil(transformer oil) breakdown voltage test ;2. Measure the DC resistance of the winding together with the bushing;3. Check the voltage ratio of all taps;4. Check the three-phase wiring group of the transformer and the p

GDVA-405 Automatic CT PT Analyzer is used to analysis the characteristics of current transformer (CT) and potential transformer(PT).It can carry all the test items for CT PT.Functions and Applications:CT turns ratio detection, ratio error and angle error calibration, polarity test and excitation cha