Industrial Electrical Testing: Transformer Turn Ratio (TTR)

Transformer turns ratio (TTR) equipment has been specifically designed to conduct TTR testing. These tests are able to verify the operating principle of a power transformer, and identify any shorted turns or open-circuited conditions. With a low voltage AC test, transformer turns ratio equipment measures the ratio of high voltage to all other winding at no-load. A TTR device then displays measured ratio variations, which should fall within 0.5% of the nameplate markings. Values that fall outside of this range indicate a shorted or open transformer winding.
Megger Megger DELTA-4310 Power Factor (Tan Delta) Test Set

The Delta-4310 is a fully automatic 12 kV insulation power factor / dissipation factor (tan delta...

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OMICRON OMICRON TESTRANO 600 Three-phase Power Transformer Test System

The OMICRON TESTRANO 600 is the world’s first portable (20 kg / 44 lbs), three-phase power...

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Megger Megger ODEN AT/2X Primary Current Injection Test System

This powerful test system is designed for primary injection testing of protective relay equipment...

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Megger Megger MTO330 Automated Six-Winding Transformer Ohmmeter

The base model, MTO300, is designed to be remote controlled via PowerDB software on an external...

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Megger Megger ODEN AT/3X Primary Current Injection Test System

The Megger ODEN AT/3X is a powerful test system designed for primary injection testing of...

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Megger Megger TTR330 Three-Phase Transformer Turn Ratio Test Set

The TTR330 offers a new user interface which allows the operator to interact with the PowerDB...

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Megger Megger MCT1605 Current Transformer Saturation, Ratio and Polarity Tester

The Megger MCT1605 test set is a lightweight, robust, portable unit used to automatically or...

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Tettex Tettex TTR2796 Three Phase Transformer Turns Ratio Meter

Three Phase 250V Transformer Turns Ratio Meter

Tettex Tettex TTR2795 Transformer Turns Ratio Meter

The TTR 2795 measures turns ratio with the highest accuracy in the industry and has one of the...

Megger Megger TTR310 Three-Phase Transformer Ratio Test Set

The TTR310 has the ability to store test results, upload results to a PC (via RS232 serial port),...

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Vanguard Vanguard ATRT-01B S2 TTR Transformer Turns Ratio Tester

The Vanguard ATRT-01B S2 is Vanguard’s third-generation micro-processor-based, single-phase...

AEMC AEMC DTR 8510 Motor / Transformer Tester

The AEMC DTR 8510 is a portable digital transformer ratiometer designed for on-site testing of...

Biddle Biddle 550100 Transformer Turns Ratio Test Set

Transformer Turns Ratio Test Set

DV Power DV Power DEM60C Three-Phase Transformer Demagnetizer

The DV Power DEM60C Three-Phase Transformer Demagnetizer generates 90-264V of AC power at a...

DV Power DV Power TRT63 Turns Ratio Tester Series

The DV Power TRT63 Turns Ratio Tester is a true three-phase, fully automatic test set specially...

Haefely Haefely RM 430 Capacitive Divider Ratio Meter

The Haefely RM 430 Capacitive Divider Ratio Meter is used for the measurement and check of the...

Megger Megger 550005 Single Phase TTR

The Single-phase TTR (Transformer Turn Ratio) Test Set measures the turns ratio and exciting...

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Megger Megger 550503 Three Phase TTR

The Three-Phase Automatic TTR is designed to measure the turns ratio of power, instrument, and...

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Megger Megger DELTA 4000 Series 12 kV Insulation Diagnostic System

The new DELTA4000 Series is a fully automatic 12 kV insulation power factor/dissipation factor...

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Megger Megger MTO210 Transformer Ohmmeter

The Megger MTO210 Transformer Ohmmeter is a line-operated, field portable instrument designed...

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Megger Megger MWA330A 3-Phase Ratio and Winding Resistance Analyzer

The Megger MWA30A 3-Phase Ratio and Winding Resistance Analyzer is a portable transformer test...

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Megger Megger TTR100 Single Phase Handheld TTR

The Megger TTR100 is an automatic handheld, battery operated transformer turns ratio test set...

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Raytech USA Raytech USA TR Mark III Three Phase Transformer Turns-Ratio Meter

Three Phase Transformer Turns-Ratio Meter

Raytech USA Raytech USA TR-1/TR-1P Single Phase Ratio Meters

Single Phase Ratio Meters

Vanguard Vanguard ATRT-03 S2 TTR Three Phase Transformer Turns Ratio Tester

The Vanguard ATRT-03 S2 is Vanguard’s third generation, microprocessor-based, automatic...