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Megger MWA300/330A Phase Ratio & Winding Resistance Analyzer - Remote Control or Onboard Computer
Description
A portable, efficient, easy-to-use, safe, advanced three-phase transformer test system, the Megger MWA300/300A Phase Rotation & Winding Resistance Analyser delivers complete ratio, phase, and winding resistance measurements for three-phase transformers. It effectively checks power transformers, distribution transformers, CTs and VTs (PTs), and motors/generators.
Models
The Megger MWA300 and MWA300A differ regarding their operating systems. Please see the table below for further details.
| Model | Operating System | Notes |
|---|---|---|
| MWA300 | Remote Controlled |
|
| MWA300A | Built-in Computer |
|
Measurements
All ratio and winding resistance tests are performed by the Megger MWA300/300A Phase Rotation & Winding Resistance Analyser and one three-phase lead-set connection that ensures all six windings can be tested faster and safer. Its test and measurement capabilities include:
- 3-phase turns ratio
- 3-phase winding resistance
- OLTC/continuity (make-before-break)
- 3-phase core demagnetisation
- Magnetic balance/ flux distribution
- Excitation current
- Polarity and phase angle deviation
- Auto vector detection
- Heat-run test
The Megger MWA300/300A Phase Rotation & Winding Resistance Analyser can also be used to check the contact and timing health of LTC (OLTC) tap changers. It offers single-person testing of LTC with support for an optional remote tap controller (RTC-1).
Setting up tests is quick and easy as the Megger MWA300/300A Phase Rotation & Winding Resistance Analyser includes just one simple test form.
3-Phase test connection (no interconnect boxes)
Ergonomic Design
Smaller and lighter than other instruments on the market, the Megger MWA300/300A Phase Rotation & Winding Resistance Analyser includes unique Kelvin clamps with patented adjustable jaws that open to 100mm (4-inch) and banana plug inputs for connection to terminal blocks. This removes the need for special lead sets and reduces the possibility of user errors due to lead connections.
Furthermore, the Megger MWA300/300A Phase Rotation & Winding Resistance Analyser does not need to be used with a switch box; once again ensuring safer and easier operation.
The Megger MWA300/300A Phase Rotation & Winding Resistance Analyser also includes built-in demagnetisation and a USB interface for data transfer to a PC.
The Megger MWA300/300A Phase Rotation & Winding Resistance Analyser is a safe, simple, speedy TTR and resistance testing instrument.
Megger MWA300/300A Phase Rotation & Winding Resistance Analyser Key Features
- A portable, efficient, easy-to-use, safe, advanced three-phase transformer test system
- Complete ratio, phase, and winding resistance measurements for three-phase transformers
- Checks power transformers, distribution transformers, CTs and VTs (PTs), and motors/generators
- MWA300: remote controlled
- MWA300A: Built-in computer
- Only one three-phase lead set connection is needed to ensure all six windings are tested quickly and safely
- 3-phase turns ratio
- 3-phase winding resistance
- OLTC/continuity (make-before-break)
- 3-phase core demagnetisation
- Magnetic balance/ flux distribution
- Excitation current
- Polarity and phase angle deviation
- Auto vector detection
- Heat-run test
- Check the contact and timing health of LTC (OLTC) tap changers
- Offers single-person testing of LTC with support for an optional remote tap controller (RTC-1)
- One simple test for quick and easy test set-up
- Smaller and lighter than other instruments
- Unique Kelvin clamps with patented adjustable jaws that open to 100mm (4-inch)
- Banana plugs input for connection to terminal blocks
- No need for special lead sets
- No need for a switch box
- Built-in demagnetisation
- USB interface for data transfer to a PC
- A safe, simple, speedy TTR and resistance testing instrument
One Intuitive, Comprehensive Test Form
What’s Included?
- Your Choice of Megger MWA300 OR MWA300A Phase Rotation & Winding Resistance Analyser
- AC Power Cord
- USB 2.0 Standard Type A to B Cable (2m/7ft)
- USB Memory Stick Containing a User Guide, PowerDB Lite, Software Related Documents
- Quick Guide
- 9m/30ft Ground Lead
- Canvas Carrying Bag
Downloads
Tech Specs
Megger MWA300/330A Phase Ratio & Winding Resistance Analyzer Technical Specifications
| 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. 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 | -10o C to +50o C (14o F to 122o F) | |
| Storage | -30o C to +70o C (-22o F to +158o F) | |
| Relative Humidity | 0-90% non-condensing | |
| Case | Ruggedized case (metal/plastic trim) with removable lid and soft-side pouch with a 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 (Winding resistance, LTC/continuity, core demagnetization, heat-run) |
|
| Resistance | ||
| Current Range (A) |
Resistance Range (Ω) |
Resolution (Ω) |
| 10 A | 10 mΩ to 0.2 Ω | 0.000001 |
| 10 A | 0.2 Ω to 2 Ω | 0.0001 |
| 1 A | 100 mΩ to 2 Ω | 0.00001 |
| 1 A | 2Ω to 20 Ω | 0.001 |
| 100mA | 1 mΩ to 20 Ω | 0.0001 |
| 100mA | 20 Ω to 200 Ω | 0.01 |
| 10 mA | 10 mΩ to 200 Ω | 0.001 |
| 10 mA | 200 Ω to 2000 Ω | 0.1 |
| Accuracy | ±0.25% Range ±0.25% Rdg | |
| Resolution | Up to 4 digits | |
| Excitation Current Specifications | ||
| Range and Accuracy | 0 to 500 mA, 3 digit resolution, ±(2% of reading + 1 digit) | |
| AC Specifications (Turns Ratio, Winding Balance) | ||
| 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) | ||
| Phase Specifications (Phase angle deviation, Phaseshift analysis, auto Vector detection) | ||
| Input voltages | 8, 40, and 80 V AC | |
| Range and Accuracy | ±90 degrees, 2 decimal points for the degree display, or the centi-radian display | |
| Accuracy | ±3 minutes (from 0.8:1 - 2,000:1) | |
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Additional Information
| SKU | NWA300/330A |
|---|
