Transformer (TLMS) & Reactor (RLMS) Loss Measurement Systems
Overview
The AccuLoss® Transformer Loss Measurement System (TLMS) and Reactor Loss Measurement Systems (RLMS) from Measurements International Limited are metrology-grade solutions designed for precise measurement of transformer and reactor losses. Engineered for modern high-voltage testing, these systems deliver industry-leading accuracy, even under challenging conditions such as extremely low power factor measurements (PF = 0.001).
Using precision voltage dividers and advanced simultaneous sampling wattmeter technology, TLMS and RLMS provide fast, stable, and highly repeatable results, making them well suited for both production and laboratory environments.
Built on proven metrology principles, the system is simple to calibrate using traceable reference standards. This reduces complexity and downtime while ensuring long-term confidence in measurement accuracy. The modular and scalable architecture supports configurations up to 800 kV and 6000 A, enabling seamless integration into new or existing test facilities across a wide range of applications.
The system supports a comprehensive range of testing applications, including load and no-load loss measurements, heat run testing, induced voltage testing, and reactor calibration at very low power factors. Integrated software provides automated test sequences, waveform analysis, and flexible data output, improving efficiency while maintaining consistent, high-quality results.
Optional oil-filled current transformers (CTs), including electronically aided and compensated designs, further extend system capability—allowing a single platform to support both transformer and reactor testing with high accuracy and stability.
Capabilities and Applications
Accurate. Defensible. Compliant.
Performance of Load and No-Load Loss Measurements
Heat Run Test
Induced Voltage Test
Zero Sequence Impedance Measurements
“Operator Friendly” software includes voltage and current waveform analysis, manual and fully automatic time-saving range selection, over-voltage, and over current protection.
Output Data: Supplied in an ASCII file for easy import into Excel spreadsheets.
Electromagnetic Compatibility: All components comply with the requirements of IEC Recommendations. In addition, the electronics is housed in one shielded enclosure.
The AccuLoss® System is designed to test small, medium, and large power transformers, up to 400 Hz and is ideal for R & D facilities. The AccuLoss® System also calibrates single and 3-phase reactors at power factors down to 0.001 and lower.