Transformer Winding Resistance Meter

XWRM-10 is a dual-channel 10A rated testing device with a winding resistance meter designed to measure the accuracy of highly inductive loads of transformers, reactors, HT motors, and other devices. 

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    XWRM-10 is a dual-channel 10A rated testing device with a winding resistance meter designed to measure the accuracy of highly inductive loads of transformers, reactors, HT motors, and other devices. The device has one current channel and two resistance channels along with a selectable smooth DC test current which is used to test windings with different ratings. It comes with a large open-circuit voltage of 42 volts for the fast charging of the highly inductive windings of transformers. It also provides stable resistance values in minimal time. The XWRM-10 is intended to replace a complex bridge set up with a single compact contrivance. The device is well protected against inductive kickbacks offered by inductive windings. XWRM-10 has a special feature to conduct heat run tests on transformers. The periodic sample readings of both the channels are stored in a special memory which can be uploaded to a computer system. The Windows-based software is equipped with features for the calculation of temperature and rise in windings from the recorded resistance values. The software can also be used for data management, graph plotting, analysis, and report generation. XWRM-10 can be operated with software too. It has an additional feature of detecting open OLTC conditions, thereby indicating the health of OLTC. The windings are automatically discharged after the test, for the safety of the operator.


    XWRM-10 is perfectly suitable for the measurement of cold and hot winding resistance of transformer winding. The instrument is designed for testing power transformers as well as distribution transformers. The data trends can reveal vital information about deterioration, incipient faults in tap changer and enables users to make informed decisions regarding maintenance.


    • Test currents of 10A,1A, 100mA & 10mA 
    • Resistance range up to 2000Ω 
    • Resolution of 0.1μΩ with ± 0.2% accuracy 
    • High open circuit voltage for quick stabilization
    • Dual channel resistance measurement 
    • Heat run test facility 
    • OLTC test facility 
    • Auto discharge 
    • Internal memory for 100 test results 
    • USB interface with software for report generation 

    Power Supply: 115/230VAC,50/60 Hz 

    Test Current

    10A, 1A, 100mA & 10mA 
    Open-Circuit Test Voltage : 42 VDC 
    Burden : 420VA 

    Resistance Measurement Range 

    Resistance Range : 0.1µΩto 2kΩ 
    Accuracy : ±(0.2% of rdg. + 5counts) 
    Resolution : 0.1µΩ

    Test Current Range (Ω) Resolution (Ω) Maximum Display (Ω)
    10A 1A 100mA 10mA
    2mΩ 0.1uΩ 1.9999mΩ
    20mΩ   1uΩ 19.999mΩ
    200mΩ 10uΩ 199.99mΩ
    0.1mΩ 1.9999Ω
    20Ω 1mΩ 19.999Ω
    200Ω 10mΩ 199.99Ω
    2000Ω 0.1Ω 1999.9 Ω


    Principle: 4 wire measurement 
    Measurement Channel: 2 resistance & 1 current channel
    Display: LCD 
    Keypad: Sealed soft touch keypad 
    Indication: LED and beep during the test on & discharge 
    PC Interface: USB 
    Internal memory: 100 test readings

    Safety & Standards 

    Ingress Protection: IP 54 
    CE Certification
    Safety: Compliant with IEC 61010-1 
    EMC: Compliant with IEC 61326-1


    Conditions Operating Temperature: 0°C to 55°C 
    Storage Temperature: -10°C to 55°C 
    Humidity: <90% RH, non condensing

    Physical Specifications 

    Dimensions (L×W×D) mm: 520 x 425 x 230 
    Weight: 11 kg 

    Software Details 

    Type: Windows based analytical software 
    Data Transfer: Real time data transfer 
    Features: Online data acquisition 
                  Graph plotting for heat run test 
                  Remote operation 
                  Test report generation 

    Standard Accessories 

    15 meters test lead set ((1current channel, 2 resistance channels)
    Mains power cord 
    Short links 
    Earthing lead 
    User manual 
    Calibration certificate 
    Carry case for test leads 

    Optional Accessories

    USB cord 

    Our Customers

    Motwane’s customer base is a testament to its ongoing ability to provide reliable, accurate, and long-lasting products, resulting in enduring relationships that are based on mutual satisfaction, loyalty, and trust.

    Contact Us

    Motwane products are highly reliable, built with great quality, and deliver accurate results.  We at BSES Rajdhani Power have been using Motwane products for many years, and continue to do so.

    Shailendra Saxena

    Additional VP Protection BSES Rajdhani Power Ltd.

    Motwane is the oldest and the most trusted company in electrical testing products and solutions also. Motwane is known for reliable and rugged products also, we have procured from them. And our organization has been using these products and have found them satisfactory in performance and services also.

    Mr. Shrikant S Rajurkar

    Director Technical MSETCL

    By using the MOT-WARE software, all equipment testing difficulties have been removed, leading to increased efficiency and happy clients.

    Mr. Milind Thekedar

    Managing Director JBS Enterprises Pvt. Ltd.

    Motwane offers great products! The company fullfills our demands, and supplies reliable products for our Power, Oil & Gas, and other industry projects.  

    Justin Thomas

    FAWAZ Trading & Engineering Services Co. W.L.L.

    MOTWANE is reputed brand since many years & we prefer it for all our International Projects

    Nikunj Mistri

    DGM- India Operations MBH Power Pvt. Ltd.

    We are very satisfied on Motwane’s oil testing products to test electrical properties of Insulation Oil


    LABGULF Sharjah UAE

    TATA Projects regularly uses Motwane’s Test & Measurement equipment for various undertakings. We are satisfied with the product performance!

    Naiyar Kamal Siddiqui

    AGM Projects Tata Projects Ltd.

    MOT-WARE will enable us to go live with data immediately after recording

    Sanjay Sarkar

    Head Projects IBMS SPG, Sterling and Wilson

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