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WR.40S Three Phase Transformer Winding Resistance Tester
About the WR.40S:

  • DC winding resistance tester is designed to measure DC resistance of inductive devices, such as transformers and power inductors.

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  • The instrument is compact in size and has a high level of accuracy with fast measurement cycle.

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  • WR.20S is ideal for measuring transformer windings and DC resistance of large power inductance equipment.

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  • Polyphase winding resistance and de-magnetization function.

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  • Suitable for Transformers up to 7MVA / 35kV models.

Specifications:

Current

  • Single phase: 1A, 5A, 10A, 20A, 40A

  • Three phase: 1A, 5A, 10A, 20A

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Range

  • Single phase:

    • 1A: 10mΩ~20Ω

    • 5A: 1mΩ~4Ω

    • 10A: 1mΩ~2Ω

    • 20A: 1mΩ~1Ω

    • 40A: 1mΩ~0.5Ω

  • Three phase:

    • 1A: 10mΩ~6Ω (per phase)

    • 5A: 1mΩ~1Ω (per phase)

    • 10A: 1mΩ~0.6Ω (per phase)

    • 20A: 1mΩ~0.3Ω (per phase)​

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Accuracy

  • ±0.2% (full range)​

Max Resolution

  • 0.1μΩ

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Data Saving Capacity

  • 200 groups

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Power

  • AC 220V±22V, 50Hz±2Hz

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Working Environment

  • Temperature: 0-40℃

  • Relative humidity: ≤80%

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Dimensions

  • 428mm × 350mm × 230mm

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Weight

  • 13.4kg

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