The EZCT-2000B is Vanguard’s third-generation microprocessor-based current transformer test set. Designed specifically for CT testing, the Vanguard EZCT-2000B Automated CT Test Set has outstanding features that can greatly increase productivity and save time during the commissioning stage.
The Vanguard EZCT-2000B’s test leads can be connected to all the CT output terminals, and the complete CT test can be performed automatically without any operator intervention.
Current Transformer saturation tests are performed in compliance with the ANSI/IEEE C57.13.1 and IEC 60044 standards. Test voltage ranges from 50, 300, 500,1200 and 2000 Vac can be selected for a saturation test.
CT Ratio and Polarity Test
The CT current-ratio is determined using the ANSI/IEEE C57.12.90 measurement method. A test voltage is applied on any two terminals (X1 to X5) of the CT, and the induced voltage is measured through the H1 and H2 terminals of the CT.
CT Winding Resistance Test
The Vanguard EZCT-2000B can measure the DC resistance of the CT winding under test. The DC winding resistance reading range is from 100 micro-ohms to 10 Ohms. Equivalent winding resistance values at different temperatures are also provided in the report.