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KDZR-20A Transformer DC Resistance Tester Ohmmeter
KDZR-20A Transformer DC Resistance Tester Ohmmeter

KDZR-20A Transformer DC Resistance Tester Ohmmeter

Applications:

Designed specifically for DC resistance measurement of transformers during manufacturing, installation, overhaul, tap changer adjustment, and routine preventative maintenance. It is an essential tool for inspecting the quality of winding joints, inter-turn short circuits, tap changer contact conditions, and conductor continuity in power and distribution transformers. It is ideal for substation commissioning, transformer factory work, and field testing of 35kV and above transformers and instrument transformers, ensuring reliable operation.

  • Response within
    24 hours

  • Free warranty
    12 month

  • On-line training
    Support

Profile:

KDZR-20A employs advanced power supply technology, featuring high output current, a wide measurement range, and comprehensive back EMF protection. Controlled by a high-speed microcontroller, it features automatic discharge with audible alarm and intelligent power management to reduce internal heat generation. With a maximum output current of 20A and a resolution of 0.1μΩ, its portable vertical design allows for fast and accurate measurement of the DC resistance of various types of transformers.

Features:

1. Highly automated, easy to operate;
2. Advanced power supply technology: high output current, wide measurement range;
3. Suitable for instrument transformers and large and medium-sized transformers ≥35kV;
4. Comprehensive reverse voltage protection, reliable performance;
5. Audible alarm and clear indication to prevent misoperation;
6. Intelligent power management reduces internal heat and saves energy;
7. Built-in mini thermal printer enables high-speed, silent printing;
8. Vertical enclosure structure for field use.

Parameter:

Current range and measurement range
20A: 100μΩ to 1Ω
10A: 500μΩ to 2Ω
5A: 1mΩ to 4Ω
2.5A: 2mΩ to 8Ω
1A: 5mΩ to 20Ω
 
Accuracy ± (0.2%±2 digits)
Resolution: 0.1μΩ
Ambient temperature: -10℃ to 40℃
Relative humidity ≤80%RH, no condensation
Working power supply: AC220V±10%, 50Hz