Current Transformer Test Set with 2000 VAC excitation voltage.
Current Transformer Test Set with 2000 VAC excitation voltage.
Current Transformer Test Set with 2000 VAC excitation voltage.
Current Transformer Test Set with 2000 VAC excitation voltage.

CURRENT TRANSFORMER TEST SET

EZCT-2000C Current Transformer Test Set with 2000 VAC excitation voltage CURRENT TRANSFORMER TEST SET
IRM-5000P Insulation Resistance Meter Insulation Resistance Meter

$16,815.00

Manufacturer: Vanguard Instrument

Model: EZCT-S2A

SKU: AMA-5127-02
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Description

CURRENT TRANSFORMER TEST SET

CURRENT TRANSFORMER TEST SET

DESCRIPTION OF CURRENT TRANSFORMER TEST SET

The EZCT S2A is Vanguard’s third-generation, microprocessor-based, current transformer test set. The EZCT S2A can perform the current transformer (CT) excitation, CT current-ratio, and winding polarity tests automatically. The EZCT S2A automatically raises and lowers the excitation test voltage without any operator intervention. With up to 1500 Vac excitation test voltage available, the EZCT S2A can easily perform excitation tests on very large CT’s.

  • Perform Saturation, Ratio and Polarity Tests
  • Fully Automated
  • Comprehensive Graphic and Tabulated Test Reports
  • Plot Multiple Saturation Curves
  • Store up to 128 CT test plans
  • Store up to 10 test definitions in each test plan
  • RS-232C and USB computer interfaces
  • Built-in 4.5 inch thermal printer
  • USB Flash drive interface

Excitation Test

The CT excitation test is performed using the ANSI/IEEE C57.13.1, IEC 60044-1 test method. The test voltage range for the CT excitation test (50 Vac, 250 Vac, 500 Vac, or 1500 Vac) can be selected, and then the test voltage is raised and lowered automatically by the EZCT S2A. The test voltage and current data are collected and stored in the unit’s internal memory. Up to 10 CT excita­tion and current-ratio tests can be stored in one test record. ANSI 10/50, IEC 60044, IEC 61869, IEEE-30, and IEEE-45 knee point voltages are also calculated and printed on the test report. Once the test is completed, test results can be printed and excitation curves can be plotted on the built-in 4.5-inch wide thermal printer.

CT Ratio and Polarity Tests

The EZCT S2A determines the CT current-ratio us­ing the ANSI/IEEE C57.12.90 measurement meth­od. A test voltage is applied to the CT’s secondary terminals and the induced voltage is measured through the CT’s H1 and H2 terminals. The CT cur­rent-ratio and polarity are displayed on the screen and stored in memory. The current-ratio measur­ing range is from 0.8 to 5,000. The CT winding polarity is displayed as a “+” sign (in-phase) or a “-” sign (out-of-phase) and is annotated with the phase angle in degrees.

User Interface

The EZCT S2A features a back-lit LCD screen (240 x 128 pixels) that is viewable in both bright sun­light and low-light levels. A rugged, alpha-numer­ic, membrane keypad is used to control the unit.

Built-in Thermal Printer

A built-in 4K” wide thermal printer can print the current transformer test report and plot the exci­tation curves.

Computer Interface

The EZCT S2A can be used as a stand-alone unit or can be computer-controlled via the built-in RS-232C or USB interfaces. Windows®-based Current Transformer Analysis software is provided with each EZCT S2A. This software can be used to re­trieve test records from the EZCT S2A, create test plans, download test plans to the EZCT S2A, and can also be used to run CT tests from the PC. Tabu­lated test records can be exported in PDF, Excel, and XML formats.

Internal Test Record Storage

The EZCT S2A can store up to 140 test records in Flash EEPROM. Each test record may contain up to 10 excita­tion curves, current-ratio readings, and winding polarity readings. Test records can be recalled and printed on the built-in thermal printer.

External Data Storage

The EZCT S2A features a standard USB Flash drive inter­face that makes it very convenient to store and transfer test records and test plans. By plugging in a USB Flash drive, you can quickly transfer your test records and test plans between a computer and the EZCT S2A without the need to connect the unit to the computer.

Internal Test Plan Storage

The EZCT S2A can store up to 128 CT test plans in Flash EEPROM. A test plan defines the excitation test voltage and current selection, CT nameplate ratio, and CT wind­ing terminal connection instructions for each test. Up to 10 test definitions can be stored in each test plan. The use of a test plan greatly simplifies the CT testing pro­cess since it also provides instructions for making the proper CT cable connections. Test plans can be created on the EZCT S2A itself or created on a PC and down­loaded to the EZCT S2A via the unit’s built-in RS-232C or USB port.

Test Record Header Information

The test record header information can include the com­pany name, substation name, circuit ID, manufacturer, CT serial number, operator’s name, and test record com­ments. In addition to the test record header, a 20-char­acter test description for each test in the record can also be entered.

SPECIFICATION

TYPE Portable current transformer test set
PHYSICAL SPECIFICATIONS 16.8”W x 12.6”H x 12”D  (42.7 cm x 32 cm x 26.9 cm); Weight: 55 lbs (25 kg)
INPUT POWER 100 – 120 Vac or 200 – 240 Vac (factory pre-set), 50 Hz/60 Hz
MEASUREMENT METHOD IEC 60044-1, IEC 61869, ANSI/IEEE C57.13.1, and ANSI/IEEE C57.12.90
OUTPUT TEST VOLTAGES 0 – 50 Vac @ 10A max, 0 – 250 Vac @ 10A max
0 – 500 Vac @ 5A max, 0 – 1500 Vac @ 1.2A max
VOLTAGE READING RANGE 0 – 2,200 Vac; Accuracy: ±1.0% of reading, ±1 volt
CURRENT READING RANGE 0 – 10A; Accuracy: ±1.0% of reading, ±0.02A
CURRENT-RATIO RANGE 0.8 – 999: 0.1%, 1000 – 1999: 0.3%, 2000 – 5000: 1%
PHASE ANGLE MEASUREMENT 0 – 360 degrees; Accuracy: ±1.0 degree
DISPLAY Back-lit LCD Screen (240 x 128 dot graphic; 114mm x 64mm);
viewable in bright sunlight and low-light levels
PRINTER Built-in 4.5-inch wide thermal printer
COMPUTER INTERFACES One RS-232C port (115k baud), one USB port
EXTERNAL DATA STORAGE One USB Flash drive interface port
(Flash drive not included)
PC SOFTWARE Windows® XP/Vista-based CT Analysis software is included with purchase price
INTERNAL TEST RECORD STORAGE Stores 140 test records. Each test record may contain up to 10 sets of excitation and ratio data
INTERNAL TEST PLAN STORAGE Stores 128 test plans. Each test plan can store 10 excitation test voltage and current settings
SAFETY Designed to meet UL 61010A-1 and CAN/CSA C22.2 No. 1010.1-92  standards
ENVIRONMENT Operating: -10˚ to 50˚ C (15˚F to +122˚ F);
Storage: -30˚ C to 70˚ C (-22˚F to +158˚ F)
CABLES Two 20-foot X cable sets, One 35-foot H cable set, power cord, One cable-carrying duffel bag
WARRANTY One year on parts and labor
Specifications are valid at nominal voltage and ambient temperature of +25˚C (+77˚F).
Last updated on February 10, 2010

 

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