HVHIPOT Portable DRM-20M 1 Phase 20A DC Winding Resistance Meter DWR DC Winding Resistance Tester for Transformer

• Customization: Available
• After-sales Service: yes
• Warranty: 1 year
• Model NO.: DRM-20M
• Display Type: Digital Only
• Certification: ISO
• Customized: Customized
• Output current: 10A, 5A, 1A, 0.2A, 10mA, <1mA
• Min. resolution: 0.1Micro Ohm
• Weight: about 8.1kg (without test cables)
• Display: 7-inch large, industrial-grade
• Transport Package: Standard Export Wooden Box
• Specification: 400mm×315mm×223mm
• Trademark: HV Hipot
• Origin: China(Mainland)

Product Description

HVHIPOT Portable DRM-20M 1 Phase 20A DC Winding Resistance Meter DWR DC Winding Resistance Tester for Transformer

Product Description

DRM-20  DC Winding Resistance Meter is a precision instrument designed to efficiently diagnose potential issues such as winding material defects, poor welding, loose connections, and broken strands by measuring winding resistance values. Utilizing high-precision constant current source and four-wire measurement technology, it automatically eliminates lead wire errors, achieves stable readings within 3 seconds, and detects minute resistance variations with a sensitivity of 0.1μΩ, ensuring stable and reliable measurement results.

Equipped with the Suhui Smart Quick (Software Copyright Registration No. 1010215, Trademark Registration No. 14684781), it streamlines operation processes and data handling through intelligent automation, providing critical support for quality control throughout the equipment's lifecycle.

Widely applicable to inductive loads such as transformers, mutual inductors, and reactors, it is also suitable for resistive test objects like copper busbars, wires, and switch contacts.


Application

1. Welding quality of winding contact
2. Turn-to-turn short circuit of winding
3. Contact of tap changer

Features

 

1. Industrial Display Benchmark: Features a 7-inch high-brightness industrial-grade color LCD screen with keypad control, ensuring clear visibility from all angles for precise operation.

2. Dual-Mode Intelligent Current: Supports fixed/auto output modes, automatically adapting to the resistance of the test object for enhanced self-adjusting capability.

3. Multi-Layer Safety Protection: Equipped with safeguards against power loss, back EMF, open circuits, and more, building a robust safety shield for both the device and testing process.

4. Built-In Temperature Coefficient Auto-Calibration: Automatically converts measured values to the standard reference temperature (75°C), ensuring test data complies with national standards.

5. One-Touch Printing: Smart printing function enables fast and convenient output of test results.

6. Efficient Data Storage: Supports both internal and USB storage, making data saving and management more convenient and efficient.

 

Product Parameters

 

Output current	20A, 10A, 5A, 1A, 0.2A, 10mA, <1mA
	20A	0.5mΩ~1Ω
Measurement range	10A	1.0mΩ~2Ω
	5A	10mΩ~4Ω
	1A	0.1Ω~20Ω
	0.2A	1.0Ω~100Ω
	10mA	50Ω~2kΩ
	<1mA	500Ω~25kΩ
Accuracy	±(reading * 0.2% + 2 digits)
Resolution	0.1μΩ
Power supply	AC 220V±10%, 50Hz/60Hz±1Hz
Display	7-inch large, industrial-grade, high-brightness color LCD
Operation	Keypad
Operation temperature	-10~50ºC
Humidity	<90%RH (no condensing)
Dimension	400mm×315mm×223mm
Weight	8.1kg