XWRM-25A transformer winding resistance meter is designed for accurate & fast measurement of the highly inductive loads such as transformers, reactors, generators, HT motors, etc. The selectable smooth DC test current is useful to test transformers with different power ratings. The higher open-circuit voltage feature saturates the core quickly to get stable readings. The three resistance measurement channels are used for the simultaneous measurement of the three windings to reduce the testing time. The heat run test feature can be availed with the software for a graphical representation. It also has a demagnetization facility, which eliminates the magnetic remanence effect. XWRM-25A can test the make-before-break operation of on-load tap-changers which can help you analyze the OLTC switch contracts. Backed with EMF protection against high inductive kickbacks, the large LCD with a keypad helps in easy operations. It also has an internal memory for 2000 test results. The software is designed for detailed report generation and control. The in-built thermal printer provides onsite report printing.
XWRM25A has a Bluetooth module with Motware mobile app for remote access of the testing data & storage in the cloud for further analysis & record purposes.
The winding resistance test is an essential test that enables the identification of shorted turns, loose connections, or deteriorating contacts in tap changers and measurements on all tap changer positions. The transformer’s conditions can be compared to previous or factory test values for evaluating the condition of the current windings and leads. The accepted criteria for the field-measured values should be within 3% of the factory values. A change higher than the accepted criteria is indicative of short-circuited turns, poor joints, or bad tap changer contacts. This test should be performed during acceptance testing and can also be performed while other maintenance electrical tests are conducted.
Power Supply: 115/230VAC, 50/60 Hz
25A, 10A, 5A, 1A, 100mA & 10mA
Open-Circuit Test Voltage: 60 VDC
Resistance Measurement Range
Accuracy: ±(0.1% of rdg. ± 5counts)
|Test Current||Range (Ω)||Resolution (Ω)||Maximum Display (Ω)|
|Test Current||Range (Ω)||Resolution (Ω)||Maximum Display (Ω)|
|5A||4 mΩ||0.1 µΩ||4.0000 mΩ|
|40 mΩ||1 µΩ||40.000 mΩ|
|400 mΩ||10 µΩ||400.00 mΩ|
|4 Ω||0.1mΩ||4.0000 Ω|
Principle: 4 wire measurement
Measurement Channel: 3 resistance & 1 current channel
Temperature Channel: 2 Channel
Temperature Range: 0 – 100 °C
Indication: LED & veep during test on, & discharge
PC Interface: USB
Internal memory: 2000 test readings
Printer: Inbuilt thermal printer
Safety & Standards
Ingress Protection: IP 54
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 60°C
Humidity: 95% RH, Non condensing
Dimensions (L×W×D) mm: 525 x 437 x 213
Weight: 15 kg
Type: Windows based analytical software
Data Transfer: Real-time data transfer
Features: Online data acquisition
Graph plotting for heat run test & OLTC dynamic test
Test report generation
15 meters measuring test lead set
Mains power cord
Short links – 2Nos.
Carry case for test leads
Bluetooth application via cloud based Motware application
Motware Cloud Application
Motwane has designed and developed MOT-WARE – a cloud-based Test Data platform to aid in accurate Asset Health Assessment. Through Motware, the Test and Measurement industry has taken a huge leap forward. It is a revolution in the way tests are conducted and the way data is analyzed.
MOT-WARE captures data from a full range of BLE Enabled Motwane Testing Equipment. It is accessible from web based applications, desktop applications, and mobile applications. In addition, it offers an open architecture that can seamlessly integrate with any non Motwane Test and Measurement equipment for quick and authentic digital test data. Data can be captured periodically as well as be streamed in real-time via sensors from IoX’n Series of IoT devices. (link to Ioxn page)
Some of its features include a pre-loaded repository of test templates for various assets as well as customizable test templates. A customized report builder in MOT-WARE allows users to create reports that can be designed and generated as per their desire. MOT-WARE also has a facility to upload test data history and the breakdown history of the assets. Tests can also be viewed in various metrics such as Pass/Fail.
Digital test data enables data analytics and visualization which offers multiple statistical advantages. It improves productivity & efficiency, enables cost reduction, and improves asset life. Data analysis done through MOT-WARE includes trend analysis, MIS reports, and pivot tables. As an add-on, MOT-WARE also offers ‘Motwane AI Analytics’(Link to AI Analytics page) which uses a proprietary AI algorithm and Machine Learning to make accurate predictions about your asset’s life based on its behavioral patterns and operating conditions.
MOT-WARE can be used for various applications across customer segments like Utilities, OEMs, Industries, Electrical contractors (Testing, O&M) or Field repairs & service providers, EPCs, commercial premises, and many more.
Join the latest innovation in Electrical Testing by using Motware on your Test and Measurement equipment.
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