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Megger MWA330A 3-Phase Ratio and Winding Resistance Analyzer

Manufacturer part number: MWA330A
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Key Features and Functions

The Megger MWA330A 3-Phase Ratio and Winding Resistance Analyzer is a portable transformer test device essential for testing power transformers, distribution transformers, CTs and VTz (PTs) and motors / generators. All ratio and winding resistance tests are performed in one instrument, with only one 3-phase lead-set connection. The MWA330A system is equipped to conduct a diverse array of tests, including 3-phase turns ratio, 3-phase winding resistance and a 3-phase core demagnetization testing. Resistance is provided on all six windings--once connected, the MWA330A performs DC resistance measurements on all high-and-low-side windings without reconnection. Test procedure is simple and efficient. Technicians save time by testing all six windings without the need for inter-connect boxes and without having to disconnect and reconnect leads. The MWA330A can be controlled via an external customer PC or its built-in industrial PC, the latter featuring a 12 in. bright-color touch-screen display resistant to direct sunlight and harsh environments. IT intervention is un-necessary as the MWA330A safely stores results and reports.

  • Combines TTR and resistance testing in one box - faster, more efficient testing
  • 55% smaller, 40% lighter than individual instruments
  • Only one set of leads required - lighter, smaller and less expensive
  • One test form - easier, faster to complete
  • Built-in demagnetisation
Current Range (A)Resistance Range (W)Resolution (W)
10 A10 mW to 0.2 W0.000001
10 A0.2 W to 2 W0.0001
1 A100 mW to 2 W0.00001
1 A2W to 20 W0.001
100mA1 mW to 20 W0.0001
100mA20 W to 200 W0.01
10 mA10 mW to 200 W0.001
10 mA200 W to 2000 W0.1

AC Range and Turns Ratio Accuracy
8 V AC:±0.1% (0.8 to 2000) ±0.25% (2001 to 4000) ±0.35% (4001 to 8000)
40 V AC:±0.1% (0.8 to 2000) ±0.15% (2001 to 4000) ±0.3% (4001 to 10,000) ±0.35% (10,001 to 25,000)
80 V AC:±0.1% (0.8 to 2000) ±0.15% (2001 to 4000) ±0.25% (4001 to 10,000) ±0.30% (10,001 to 45,000)
  • EC60076-2-1993
  • C57.12.90 2013
  • ANSI C57.12.70-1978
Description

Key Features and Functions

The Megger MWA330A 3-Phase Ratio and Winding Resistance Analyzer is a portable transformer test device essential for testing power transformers, distribution transformers, CTs and VTz (PTs) and motors / generators. All ratio and winding resistance tests are performed in one instrument, with only one 3-phase lead-set connection. The MWA330A system is equipped to conduct a diverse array of tests, including 3-phase turns ratio, 3-phase winding resistance and a 3-phase core demagnetization testing. Resistance is provided on all six windings--once connected, the MWA330A performs DC resistance measurements on all high-and-low-side windings without reconnection. Test procedure is simple and efficient. Technicians save time by testing all six windings without the need for inter-connect boxes and without having to disconnect and reconnect leads. The MWA330A can be controlled via an external customer PC or its built-in industrial PC, the latter featuring a 12 in. bright-color touch-screen display resistant to direct sunlight and harsh environments. IT intervention is un-necessary as the MWA330A safely stores results and reports.

  • Combines TTR and resistance testing in one box - faster, more efficient testing
  • 55% smaller, 40% lighter than individual instruments
  • Only one set of leads required - lighter, smaller and less expensive
  • One test form - easier, faster to complete
  • Built-in demagnetisation