HEWE Series Transformer Tester

1. LCD display

2. Ratio error and phase angle error test

3. Impedance and admittance test

4. With PC software

5. With inbuilt mini printer for printing test records (optional)


Technical Index

1. Ratio Error Test of CT and PT

2. Impedance and Admittance Test

3. LCD display and touch screen operation

4. Sound & Light Alarm Function when polarity abnormal or ratio inconsistent

5. With RS232 communication port

6. With PC Software

7. With inbuilt printer (optional)

Support customized requirement. 

About us

We offer technical and commercial assistance to our customers, serving them to maintain their time and cost schedules;

we offer valuable solution and help our partners to win with excellent quality with competitive prices and good after sales service;

we are devoted to develop and setup partnership with our clients to get one win-win.

Our management team and experienced staff are committed towards meeting our client’s specific objectives by offering valuables.

Our mission is: Focus on power field, basing on technology and innovation, providing valuable solution, grow together with our partners in the world. 

Welcome to visit us and we are here ready to provide all the necessary assistances you want, sincerely hope we can have good chances to work together and setup long term cooperation relationships. Whether selecting a current product from our catalog or seeking engineering assistance for your application, you can talk to us about your sourcing requirements. Besides, we are making great efforts to develop new products to meet different requirements,we have had a good reputation among our customers because of our perfect services, quality products and competitive prices. We warmly welcome customers to cooperate with us for common success.

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  • Rated current

    5A, 1A

    Rated Voltage

    100V, 110V, 115V, 120V, 150V, 200V, 220V, 230V (or according to client requirement)


    1/√3, 1/3, 1, 1.5, 2

    Accuracy class


    Operation Range

    (1%-120%)In; (20%-120%)Un



    Ratio Error Range

    ±0.0001%- ±99.99% (3 ranges: 0.9999%, 9.999%, 99.99%)

    Minimum resolution: 0.0001%

    Phase Error Range

    0.01′ ~ ±999′ (3 ranges: 9.90′, 99.0′, 999′)

    Minimum resolution: 0.001’

    Impedance range

    0.001Ω~ 19.99Ω.

    Minimum Resolution: 0.001Ω

    Admittance Range

    0.001ms ~ 19.99 ms

    Minimum Resolution: 0.001ms

    Input Load

    On Standard CT secondary side: ≈0.11Ω, COSφ≈1.0

    On Test Object CT secondary side: ≈0.003Ω, COSφ≈1.0

    On Standard PT secondary side: ≈0.05VA (100V)

    Power supply

    AC 220V±10%

    Power consumption


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