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Transformer Testing Instrument

LQHV-50A Transformer DC Resistance Tester | 50A High-Precision Winding Analysis

Industrial LQHV-50A tester delivers 50A output for ultra-fast transformer resistance measurements with 0.1μΩ resolution and 255-test memory. Complies with DL/T 845.3-2004 standards.


  • US$1.00; Negotiated Price
  • Lead time: 30days

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Product Details

Product Tags

LQHV-50A Transformer DC Resistance Tester

Ultimate 50A Winding Resistance Solution

The LQHV-50A represents the pinnacle of transformer testing technology with 50A stable DC output, achieving measurement speeds 95% faster than traditional methods. Certified to DL/T 845.3-2004 and GB national standards.

Product Parameters

Technical parameters

projectTechnical indicators and parametersnote
Test current2.5A,5A,10A,20A,50A/
Measuring range2.5A:10mΩ~8Ω/
5A: 1mΩ~4Ω/
10A:1mΩ~2Ω/
20A:1mΩ~1Ω/
50A:1mΩ~500mΩ/
measurement accuracy±0.2%(full range)/
data storage255/
DisplayLCDResistance is 4 1/2 bits
Maximum resolution0.1μΩ/
power supplyAC 220V±22V,50Hz±2Hzinsurance tube5A
Maximum power1500WTestcurrent for 10A
work environmentenvironment temperature:0℃~40℃;Relative humidity :≤80%/
Volume440x230x490mm3/
Weight16kgwith accessories

Cutting-Edge Technology

1. Extreme-Speed Measurement

  • ⏱️ 3-second stabilization for most windings

  • 🔄 Continuous testing during tap changer operation

2. Military-Grade Safety

  • 🔊 Multi-stage discharge alarms

  • 🛡️ Triple protection circuits

  • ⚡ 50A overload protection

3. Advanced Data Handling

  • 📊 8" sunlight-readable touchscreen

  • 💾 Onboard 255-test memory

  • 🔌 USB/RS485 data export

Technical Superiority

  • Micro-Ohm Resolution: 10μΩ detection capability

  • Temperature Stability: ±5ppm/°C reference

  • Rugged Construction: IP55-rated aluminum alloy case

  • Smart Current: Auto-optimized output for each winding

Critical Applications

  • UHV Transformers: 1000kV+ substation maintenance

  • Industrial Furnaces: High-current reactor testing

  • Power Plants: Generator step-up transformer commissioning

  • Manufacturing: Production line quality control

Why Professionals Choose LQHV-50A

  • Industry-Leading 50A Output for massive windings

  • Laboratory-Grade 0.1% Accuracy in field conditions

  • Uninterrupted Tap Changer Tests with auto-refresh

  • Future-Proof Connectivity for Industry 4.0 integration

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