CT Winding Insulation Resistance Test
The EZCT-2000B can measure the insulation resistance of the CT’s secondary winding using a test voltage up to 1000 Vdc. The DC winding resistance reading range is from 2 to 500 Mega-ohms.
The Vanguard EZCT-2000B’s programmable current source (0-20A, 0-15Vac) can be used to verify CT loads. The on-time timer and output current are displayed on the LCD screen.
Test Record Header Information
Test record header information, including the company, substation name, circuit ID, manufacturer, mode, CT serial number, and the operator’s name, can be stored with each record.
User Interface and Display
The Vanguard EZCT-2000B features a back-lit LCD screen (240 x 128 pixels) that is clearly viewable in both bright sunlight and low-light levels.
A 4.5-inch wide built-in thermal printer can print the CT test results and excitation curves.
Internal Test Record Storage
The EZCT-2000B can store up to 140 test records in Flash EEPROM. Each test record may contain up to 10 excitation curves, burden test reports, current ratio readings, and polarity and DC resistance readings.
The EZCT-2000B can be used as a stand-alone unit or can be computer-controlled. It can be connected to a PC via the standard RS-232C or USB port. In computer-controlled mode, test records can be downloaded from the EZCT-2000B’s memory, or CT tests can be run from the PC.
Internal Test Plan Storage
The EZCT-2000B can store up to 128 CT test plans in Flash EEPROM. A test plan is comprised of the excitation test voltage, current range selection, CT nameplate ratios, and CT winding terminal combinations (X1 to X5) for each test and also includes the insulation test definition.
External Data Storage
The EZCT-2000B features a standard USB Flash drive interface that makes it very convenient to store and transfer test records and test plans.