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Megger MWA300 Winding Resistance Analyser
Introduction of Megger MWA300
The Megger MWA300 three-phase ratio and winding resistance analyser is a sophisticated transformer testing system that delivers comprehensive ratio, phase, and winding resistance measurements with just a single three-phase lead set connection. Additionally, it offers portability, reduced setup time, and enhanced job safety.
Once connected, the Megger MWA300 performs DC resistance measurements on all high- and low-side windings without the need for reconnection. It features an eight-terminal/six-winding resistance measurement capability and eliminates the need for interconnected boxes, enabling you to test all phase windings without disconnecting and reconnecting leads.
Megger MWA300 Key Features
- 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
Megger MWA300 Specifications
| Feature | Details |
| Input Power | MWA3xx: 108 to 132 V, (207 to 253 V*), 58 - 62 Hz, 660 VA MWA3XX-47: 207 to 253 V, (108 to 132 V*), 48 - 52 Hz, 660 VA *Input fuse change required - 6.3A fuse for 120 V nominal and 4.0A fuse for 230 V nominal line input |
| Internal Data Storage | MWA330A (built-in computer): Up to 100,000 data sets |
| Communication/Control Software | MWA3xx: PowerDB Lite MWA330A: Controlled via built-in industrial PC or external customer PC |
| Compatibility | The MWA330A’s internal computer is designed to control a limited number of Megger instruments including the DELTA4000 as well as the Megger S1 and MIT Series DC insulation testers |
| Environmental | Operating: -10°C to +50°C (14°F to 122°F) Storage: -30°C to +70°C (-22°F to +158°F) Relative Humidity: 0-90% non-condensing |
| Case | Ruggedized case (metal/plastic trim) with removable lid and soft-side pouch with carrying strap |
| Safety/EMC/Vibration | Conforms to the requirements of: IEC 61010-1:2010 ASTMD999.75 IEC 61326-1:2012* (both emissions and immunity) * - see manual |
| Dimensions/Weight | Dimensions: 290 x 290 x 460 mm (11 x 11 x 18 in.) does not include handles Weight: Standard unit: 14.5 kg (32 lbs) |
| Transformer Winding Phase Relationship | ANSI C57.12.70-1978 CEI/IEC 76-1:1993 and Publication 616:1978 AS-2374, Part 4-1982 (Australian Standard) |
| DC Specifications | Resistance ranges: Current Range (A) |
| AC Specifications | 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) |