Handheld Transformer Turns Ratio Tester

Buy a quality Handheld Transformer Turns Ratio Tester following IEC standards and actual power industry inspection demands from Weshine, a professsional manufcaturer in China. Ratio testing is a mandatory step in transformer production, site commissioning, regular maintenance and handover acceptance. The test can catch winding short/open circuits, misconnected wiring, faulty tap changers and reversed polarity at an early stage.

This Handheld Transformer Turns Ratio Tester outputs complete three-phase sine waves with auto voltage adjustment, which keeps test signals stable and delivers highly consistent measured data. Soft start and soft stop functions are integrated to guard both the tester itself and the transformer being tested against sudden voltage shocks, a key advantage that helps clients cut equipment loss and win long-term supply cooperation with repeat bulk orders within procurement budgets.

Flexible testing modes cover single-phase, three-phase and Z-type transformers, plus CT & PT ratio and polarity checks. Its unique blind test feature lets technicians complete ratio and vector group readings even without prior knowledge of the transformer’s wiring layout.

The device auto-calculates turns ratio, ratio deviation, phase angle gap, vector group and excitation current, while judging polarity automatically. A clear vector graphic pops up on screen, helping field staff rapidly judge wiring status and hidden equipment defects.

The bright 7-inch color touchscreen delivers easy operation for all operators. All test logs can be saved locally, exported as Word files via USB, printed straight from the built-in thermal printer, or sent out through Bluetooth and RS232 for later report sorting and analysis.

Equipped with a rechargeable lithium battery pack, this Handheld Transformer Turns Ratio Testerl balances portability and stable performance, equally fit for outdoor field work and indoor lab testing.

Core Features

1．Lightweight handheld turns ratio testing device

2．Full three-phase sine wave inverter output

3．Auto voltage stabilization control

4．Soft start & soft stop protective functions

5．Blind test for ratio and vector group identification

6．Support for single-phase transformer detection

7．Support for three-phase transformer detection

8．Support for Z-type transformer detection

9．CT ratio and polarity inspection

10．PT ratio and polarity inspection

11．Auto identification of transformer vector groups

12．Auto phase angle value reading

13．Auto polarity judgment function

14．Real-time vector diagram display

15．Max measurable ratio up to 20,000

16．High-luminance 7-inch color touch screen

17．Bluetooth data transmission function

18．Reserved RS232 communication port

19．Embedded thermal print module

20．Local storage + USB data export

21．Dual-language menu: Chinese & English

22．Built-in rechargeable lithium battery

Applicable Scenarios

1.Power Grid Operators

Carry out routine transformer commissioning and regular maintenance inspection.

2.Transformer Production Factories

Finish factory acceptance tests and production quality control checks.

3.Substation Sites

Verify transformer ratio and vector group data during equipment installation and overhaul.

4.Industrial Power Distribution Systems

Complete periodic preventive inspection on distribution transformers.

5.Professional Testing Labs

Conduct high-precision transformer diagnosis and certification testing.

Competitive bulk pricing is available for all project purchasers, and we can sign long-term supply agreements to cover continuous annual inspection equipment demands.

Main Testing Functions

1．Transformer turns ratio measurement

2．Transformer vector group identification

3．Transformer polarity inspection

4．Transformer phase angle testing

5．Current transformer (CT) ratio detection

6．CT polarity verification

7．Voltage transformer (PT) ratio detection

8．PT polarity verification

9．Special Z-type transformer testing

10．Factory Acceptance Test (FAT) execution

11．Substation new equipment commissioning

12．Long-term equipment preventive maintenance

Weshine Product Edge

Weshine Electric focuses on developing and manufacturing transformer testing tools and electrical fault diagnosis instruments. The Handheld Transformer Turns Ratio Tester integrates accurate measurement algorithms, full automatic operation, portable handheld design and multi-channel data transmission functions.It supplies stable, efficient transformer testing solutions for global power grid operators, transformer manufacturers and testing labs, and we welcome all global buyers to sign framework procurement contracts for one-stop sourcing of transformer test instruments.

Share your transformer inspection project demands with our sales team to get competitive bulk quotations and complete certification documents for your procurement plan.