This item is a great condition used Megger MWA330A Winding Analyzer 3-Phase TTR and Winding Resistance Tester (MWA330A-47 CAT # 1008-641). *Does not include lid/cover.* Calibrated to NIST traceable standards on August 20, 2025. Includes Megger carry bag, standard power cable, USB cable (must be connected to tester to communicate with top panel), 1:1 Ratio Test standard, Megger Lead Set 2008-60KIT2 test leads with clamps (60ft, 4 H Leads, 4 X Leads), and traceable calibration certificate. All pictures are of the actual unit and accessories. Please see pictures showing the unit testing winding resistance on a 5mOhm resistor and ratio test on a 1000 turns standard.
This item comes with a 6 Month (180 day) warranty. Every pre-owned unit we offer goes through meticulous inspection and NIST calibration to guarantee its reliability and durability.
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Megger MWA330A Winding Analyzer 3-Phase TTR and Winding Resistance Tester
The Megger MWA300 and MWA330A three-phase ratio and winding resistance analysers are advanced transformer test systems that provide complete ratio, phase, and winding resistance measurements with only one three-phase lead set connection. What’s more, they offer portability, a reduced set-up time, and increased job safety.
Once connected, the MWA300 and MWA330A perform DC resistance measurements on all high- and low-side windings without reconnection. It has an eight-terminal/six-winding resistance measurement capability and doesn’t need any interconnected boxes, allowing you to test all phase windings without having to disconnect and reconnect leads.
The MWA300 and MWA330A save you even more time by using a single software platform: PowerDB. This means you only need one setup and one easy-to-use test form.
The MWA300 and MWA330A can be used to effectively test power transformers, distribution transformers, CTs and VTs, and motors and generators. The following tests/functions are easily performed with a single instrument and one three-phase lead set connection:
- Three-phase turns ratio
- Three-phase winding resistance
- OLTC continuity (make-before-break)
- Three-phase core demagnetisation
- Magnetic balance/flux distribution
- Excitation current
- Polarity and phase angle deviation
- Auto vector detection
- Heat-run test
The MWA330Acomes equipped with its own built-in computer that can be operated via a 305 mm (12 in) colour touch screen display and can store up to 100 000 data sets.