Combined TTR and winding resistance tester in one box

The Megger MWA3 Series Transformer Winding Analyser is designed to perform transformer ratio and winding resistance testing in one box quickly and efficiently. It is an advanced three-phase portable transformer test system that reduces set-up time, increases job-site safety and delivers improved productivity versus individual instrument testing.

The unit’s light weight (15kg/32 lbs.) and small size (280 x 280 x 460 mm/11 x 11 x 18 in.) makes it 40 percent lighter to carry and offers 55 percent more space in vehicles than other equipment on the market today. The ease and convenience of using the same set of test leads eliminates the need for frequent ladder trips and mistakes with lead connections from one lead set to another; one set of leads equals one ladder climb.

The MWA3 Series provides complete ratio, phase and winding resistance measurements for a three-phase transformer. All ratio and winding resistance tests are performed in one instrument with one three-phase lead-set connection. Testing complex three-phase transformers becomes easier with the MWA3 Series, as operator uses one setup, one connection and one common test form for a consistent, easy-to-learn test method. The following tests are easily performed with the MWA3 Series, all with one instrument and one three-phase lead-set connection: three-phase turns ratio, three-phase winding resistance, auto vector detection, heat-run test, OLTC/continuity (make-before-break), core demagnetization, magnetic balance/flux distribution, excitation current, polarity, and phase angle deviation.

There are two interface options available. The externally-controlled model MWA300 is a ‘black box’ style package that is remotely controlled by PowerDB software running on an external PC (not provided). The MWA330A model features a built-in 12-in./300-mm industrial touch-screen computer.



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