The Vanguard Instruments EZCT 2000B is a third-generation, microprocessor-based current transformer (CT) test set. It’s designed for comprehensive CT testing in the field, aiming to increase productivity and save time during commissioning.
Data Management:
Description:
Sprecifications:
Resources:
Data Management:
- Stores up to 140 test records in internal flash EEPROM. Each record can contain multiple saturation curves, burden test reports, ratio readings, polarity, and DC resistance readings.
- Can store up to 128 test plans, which include saturation test settings, CT nameplate ratios, and winding terminal combinations, simplifying repetitive testing.
- Includes a built-in 4.5-inch wide thermal printer for immediate report generation, including test results and saturation curves.
- Offers interfaces for data transfer and external control via RS-232C, USB, and USB flash drive.
Description:
- Automated CT Testing: The EZCT-2000B can perform a full suite of CT tests automatically once connected to all the CT output terminals, eliminating the need for manual lead switching.
- Multiple Tests: It performs several critical CT tests, including:
- CT excitation (saturation) tests using the ANSI/IEEE C57.13.1 method. It offers selectable test voltage ranges (50, 300, 500, 1200, and 2000 Vac) and automatically raises and lowers the voltage. It calculates and prints knee-point voltages according to various standards (ANSI 10/50, IEC 60044, IEEE-30, IEEE-45). It can store up to 10 excitation tests per record and plot saturation curves.
- CT current-ratio tests using the ANSI/IEEE C57.12.90 method by applying a test voltage to the secondary terminals and measuring the induced voltage on the primary side. The ratio is displayed and stored, with a measurement range of 0.8 to 5,000. It also calculates and displays the current ratio error and phase displacement based on the CT burden and rated current.
- CT polarity tests, displaying the polarity as “+” (in-phase) or “-” (out-of-phase) along with the phase angle
- CT secondary burden measurement by injecting a 1A or 5A test current and displaying voltage, current, power factor, and burden impedance.
- CT winding insulation resistance measurement using a DC test voltage up to 1000 Vdc, with a reading range of 2 to 500 Mega-ohms.
- CT secondary winding DC resistance measurement with a range of 100 micro-ohms to 10 ohms.
Sprecifications:
- Type: Portable current-transformer test set
- Physical Specifications: 19″ W x 13″ H x 15.8″ D (48.3 cm x 33.0 cm x 40.1 cm); Weight: 73 lbs (33.1 kg) – Note: Some sources list slightly different dimensions and weights, so there might be variations or packaging considerations.
- Input Power: 100 – 120 Vac or 200 – 240 Vac (factory pre-set), 50/60
- Measurement Method: Complies with ANSI/IEEE C57.12.90 and ANSI/IEEE C57.13.1 standards.
- Current Source: 1-20A @ 0-15 Vac
- Voltage Reading Range: 0-2,200 Vac; Accuracy: ±1.0% of reading, ±1 V
- Current Reading Range: 0-10A; Accuracy: ±1.0% of reading, ±0.02A
- CT Current Ratio Range: 0.8-999: ±0.1%; 1000-1999: ±0.3%; 2,000-5,000: ±1%
- Phase Angle Measurement: 0-360 degrees; Accuracy: ±1.0 degree
- Resistance Reading Range: 100 micro-ohms – 10 ohms; Accuracy: ±2% of reading, ±1 count
- Insulation Resistance Reading Range: 2 Mega-ohms – 500 Mega-ohms; Accuracy: ±3% of reading, 500-1000 Vdc test voltage
- Display: Back-lit LCD Screen (240 x 128 dot graphic; 114mm x 64mm)
- Printer: Built-in 4.5-inch wide thermal printer
- Computer Interfaces: One RS-232C (115,000 Baud) port, One USB port
- External Data Storage: One USB Flash drive interface port
- PC Software: Windows® XP/Vista-based CT Analysis software is typically included.
- Internal Test Record Storage: 140 test records
- Internal Test Plan Storage: 128 test plans
- Environment: Operating: -10°C to 50°C (15°F to +122°F); Storage: -30°C to 70°C (-22°F to +158°F)
- Cables Included: Typically includes five 20-foot X cable sets, one 35-foot H cable set, current source cables, insulation test cables, power cord, and a ground cable. A transportation case is also usually included.
Resources:
