Vanguard Instruments Products - Transformer Turns Ratio Meters

Single Phase Transformer
Turns Ratio Meters

Three Phase Transformer
Turns Ratio Meters

Single Phase Transformer Turns Ratio Meters

ATRT-01 Series 2 Transformer Turns-Ratio Tester


Highest ratio: 0.8 - 15,000 Microprocessor controlled Computer Interface No calibration required Display excitation current Display winding polarity Calculate turn ratio in percentage Rugged, portable, inexpensive and easy to use	Vanguard Instruments Company’s Model ATRT-01 Series 2 is a third generation microprocessor-based, single-phase, automatic, transformer-turns-ratio tester.The ATRT-01 is an AC-powered, transformer turns-ratio tester. The ATRT-01 determines the transformer turns ratio by precisely measuring the voltages across the unloaded transformer windings and then displaying the voltage ratio.

ATRT-01B Series 2 Transformer Turns-Ratio Tester


Highest ratio: 0.8 - 15,000 Microprocessor controlled Computer Interface No calibration required Battery or AC power Display excitation current Display winding polarity Calculate turn ratio in percentage Rugged, portable, inexpensive and easy to use	The ATRT-01B Series 2 is ac-line or rechargeable-battery powered transformer turns-ratio tester. The ATRT-01B is powered by a 6-Volt, 7 Ampere-hour, lead-acid battery. This high capacity, plus the low-power consumption circuitry allows the ATRT-01B to be used continuously for up to 6 hours between recharges. A built-in charger lets the ATRT-01B be used while the battery is being charged.

ATRT-01D Series 2 Transformer Turns-Ratio Tester


Highest ratio: 0.8 - 15,000 Microprocessor controlled Battery power (D-Cells) Computer Interface No calibration required Display excitation current Display winding polarity Calculate turn ratio in percentage Rugged, portable, inexpensive and easy to use	The ATRT-01D Series 2 transformer turns ratio tester is powered by six D-cells. Up to 250 tests can be run on one set of D-cell batteries. Users can also use rechargeable D-cell batteries in the Model ATRT-01D.

Three Phase Transformer Turns Ratio Meters

Tri-Phase True 3-Phase Transformer Ratio Tester

Generates its own 3-phase transformer test voltage from single-phase AC or DC Power input
Capable of detecting 130 different 3-phase transformer types defined by ANSI, IEC, and Australian standards plus phase shifting transformers
64 x 128 graphic LCD screen
Store up to 128 transformer test-plans in Flash EEPROM
Store up to 112 test records in Flash EEPROM
Built-in USB Flash Drive Interface
Computer Interface (RS-232C and USB Port)
4.5 Inch thermal printer
Built-in transformer load tap changer
Powered from a single phase 100-264 Vac 50/60 Hz

Vanguard’s new TRI-PHASE is a true 3-phase transformer turns ratio tester designed to conform to the IEEE C57.12.90 measurement method. The TRI-PHASE outputs a 3-phase excitation test voltage to the three transformer primary windings. The induced 3-phase secondary voltages are sensed and the transformer turns ratio is calculated. The TRI-PHASE is capable of measuring turns ratios from 0.8 to 15,000. The 3-phase excitation current, phase angle readings along with the turns ratios are displayed on the built-in LCD. Since a 3-phase voltage is used to excite the transformer windings, the TRI-PHASE can detect and measure turns ratios of any transformer type. The TRI-PHASETM can easily measure the turns ratio of phase-shifting transformers where other 3-phase transformer ratio testers cannot.

ATRT-03A Series 2 Automatic Transformer Ratio Tester

Capable of detecting 130 different 3-phase transformer types defined by ANSI, IEC, and Australian standards plus phase shifting transformers
Store up to 128 transformer test-plans in Flash EEPROM
Store up to 112 test records in Flash EEPROM
Built-in USB Flash Drive Interface
Computer Interface (RS-232C and USB Port)
4.5 Inch thermal printer
Built-in transformer load tap changer
Powered from the built-in rechargeable lead acid batteries (3 hours) or a single phase 100-240 Vac 50/60 Hz.

The Vanguard Instruments Company Model ATRT-03A Series 2 is Vanguard's third generation, microprocessor-based, automatic, three phase transformer turns-ratio tester.

The ATRT-03A Series 2 determines the transformer turns ratio using the IEEE C57.12.90 measurement method. The ATRT-03A Series 2 generates and outputs an excitation voltage to the three transformer primary winding. The included secondary voltage is sensed and the transformer turns ratio is calculated.

The ATRT-03A Series 2 is capable of measuring turns ratios from 0.8 to 15,000. The transformer turns-ratio, excitation current and phase-angle readings are displayed on the LCD. The built-in transformer type detection feature allows the ATRT-03A Series 2 to detect and test 130 transformer types defined by ANSI, CEI/IEC and Australian standards.

ATRT-03 Series 2 3-Phase Transformer Turns-Ratio Tester

Highest ratio: 0.8 - 15,000
Capable of detecting 130 different 3-phase transformer types defined by ANSI, IEC, and Australian standards
3 Test voltages available: 8Vac, 40Vac, 100Vac
Phase angle and excitation current measuring
Computer Interface (RS-232C and USB Port)
USB flash drive interface
Name-plate turns ratio calculation
Computed % error based on measured and calculated ratio
Built-in 4.5" thermal printer
Powered from a single phase 100-264 Vac 50/60 Hz

The Vanguard Instruments Model ATRT-03 S2 is the third generation, microprocessor-based, automatic, three phase, transformer turns-ratio tester. This light weight, rugged, portable unit is designed for transformer testing at utility power substations.

The ATRT-03 S2 determines the transformer turns ratio using the IEEE C57.12.90 measurement method. The ATRT-03 S2 outputs an excitation test voltage to the transformer primary windings. The induced secondary voltage is sensed and the transformer turns ratio is calculated. The ATRT-03 S2 is capable of measuring turns ratios from 0.8 to 15,000. The transformer turns-ratio, excitation current, and phase angle readings are displayed on the large LCD. The automatic transformer type detection feature allows the ATRT-03 S2 to detect and test 130 transformer types defined by ANSI, CEI/IEC and Australian standards.

ATRT-03 3-Phase Transformer Turns-Ratio Tester

Highest ratio: 0.8 - 15,000
Built-in 4.5" thermal printer
Excitation current measuring
Phase angle measuring
Computer interface
Name-plate turns ratio calculation
Computed % error based on measured and calculated ratio
Automated phase switching

The ATRT-03 is a three-phase, transformer turns-ratio tester. The Model ATRT-03 is lightweight, rugged, and portable, and is designed for transformer testing at utility power substations.

The Model ATRT-03/03A determines the transformer turns ratio by accurately measuring the voltages across the unloaded transformer windings and then displaying the ratio of these voltages (ratios range from 0.8 to 15,000). The ATRT-03A calibrates each measurement to ensure the turns-ratio accuracy.

ATRT-03A 3-Phase Transformer Turns-Ratio Tester


Highest ratio: 0.8 - 15,000 Built-in 4.5" thermal printer Excitation current measuring Phase angle measuring Computer interface Name-plate turns ratio calculation Computed % error based on measured and calculated ratio Input power: 85-264 Vac; 110-370 Vdc and 12 Vdc car battery AC or battery powered Automated phase switching	The ATRT-03A is an AC/DC-powered 3-phase, transformer turns-ratio tester. The ATRT-03A can operate from a wide range of voltages and from various power sources including 85 to 264 VAC; 110 to 370 VDC; and 12 VDC (car battery).

ATRT-03B 3-Phase Transformer Turns-Ratio Tester

Highest ratio: 0.8 - 15,000
Name-plate turns ratio calculation
Computed % error based on measured and calculated ratio
Automated phase switching
Excitation current and phase angle measuring
Computer interface

The Vanguard Instruments Co. Model ATRT-03B is a second generation, microprocessor-based, automatic, three-phase, transformer, turns-ratio meter. The Model ATRT-03B is lightweight, rugged, and portable for use in transformer testing at utility power substations.

The ATRT-03B can store 200 transformer test records in Flash EEPROM. Each test record may contain up to 99 ratio, excitation current, phase angle, and name plate voltage readings. Test records can be recalled and downloaded to an IBM-compatible PC.

ATRT-03B Series 2 3-Phase Transformer Turns-Ratio Tester

Highest ratio: 0.8 - 15,000
Name-plate turns ratio calculation
Computed % error based on measured and calculated ratio
Automated phase switching
Excitation current and phase angle measuring
Can store 112 transformer test records internally. Each record holds the test record header and up to 33 readings
Can store 128 transformer test plans internally
USB, RS-232C, and USB Flash drive interface

The ATRT-03B S2 is Vanguard’s third generation, microprocessor-based, automatic, three phase, transformer turns-ratio tester. This lightweight and rugged portable unit is designed for transformer testing at utility power substations.

The ATRT-03B S2 determines the transformer turns-ratio using the IEEE C57.12.90 measurement method. The ATRT-03B S2 outputs an excitation test voltage to the transformer’s primary windings. The induced secondary voltage is sensed and the transformer turns-ratio is calculated. The ATRT-03B S2 can measure turns-ratios from 0.8 to 15,000. The transformer turns-ratio, excitation current, and phase-angle readings are displayed on the large back-lit LCD. The built-in transformer type detection feature allows the ATRT-03B S2 to detect and test 130 transformer types defined by ANSI, CEI/IEC and Australian standards.

RTC Remote Tap-Changer Controller

The Model RTC is an accessory which is used with the Models ATRT-03, ATRT-03A, and ATRT-03B units. The RTC enables the user to remotely raise or lower a transformer tap by interfacing with the transformer tap-changer controller.