The Megger MWA300 and 330A Transformer Winding Analyzers are here to offer you a faster, more efficient testing device through combining TTR and resistance testing in a single unit. This advanced 3-phase transformer test system provides complete ratio, phase and winding resistance measurements with only one 3-phase lead-set connection. What’s more, it offers portability, a reduced set-up time and increased job safety.
Once connected, the MWA300 performs DC resistance measurements on all high- and low-side windings without reconnection. It has an 8-terminal/6-winding resistance measurement capability and doesn’t need any inter-connected boxes, allowing you to test all 6 windings without having to disconnect and reconnect leads.
The MWA300 series saves you even more time by using a single software platform, PowerDB, which means you only need one set-up and one easy-to-use test form. The MWA300 series can be used effectively test power transformers, distribution transformers, CTs and VTs, and motors and generators.
The MWA330A comes equipped with a built-in computer that has a 305 mm (12 in) color display and touch-screen interface. The computer is designed to control the unit and it can store up to 100, 000 data sets.
| Key Features |
| 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 demagnetization |
| Benefits |
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| The following tests are easily performed with a single instrument | 3-phase turns ratio
3-phase winding resistance
OLTC continuity (make-before-break)
3 phase core demagnetization
Magnetic balance / flux distribution
Excitation current
Polarity and phase angle deviation
Auto vector detection
Heat-run test
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| Specifications |
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MWA3xx
Three-Phase Ratio and Winding Resistance Analyzer
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| Feature | Parameter |
| 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
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| Internal Data Storage | MWA330A (built-in computer): up to 100,000 data sets (built-in computer) |
| 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.
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| Environmental | Operating:
-10⁰ C to +50⁰ C (14⁰ F to 122⁰ F)
Storage:
-30⁰ C to +70⁰ C(-22⁰ F to +158⁰ F)
Relative Humidity:
0-90% non-condensing
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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)
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| Dimensions | 290 x 290 x 460 mm
11 x 11 x 18 in
does not include handles
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| Weight | Standard Unit:
14.5 kg
32 lbs
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| 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)
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| Excitation Current Specifications | Range and Accuracy:
0 to 500 mA, 3 digit resolution, ±(2% of reading + 1 digit)
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| 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)
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| Phase Specifications | Input voltages:
8, 40, and 80 V AC
Range and Accuracy:
±90 degrees, 2 decimal points for the degree display, or for the centi-radian display
Accuracy:
±3 minutes (from 0.8:1 – 2,000:1)
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Note:
* Input fuse change required - 6.3A fuse for 120 V nominal and 4.0A fuse for 230 V nominal line input.
| Specifications |
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MWA 3xx Series
3-Phase Ratio and Winding Resistance Analyzer
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| Model Overview |
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| Model | Description |
| Externally controlled Model MWA 300 Series |
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| MWA300 | 3-Phase Winding Analyzer, remote control only, nominal 120 V, 60 Hz* |
| MWA300-47 | 3-Phase Winding Analyzer, remote control only, nominal 230 V, 50 Hz* |
| Built-in Computer Model MWA 330A Series |
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| MWA330A | 3-Phase Winding Analyzer, on board industrial computer with 305 mm (12 in.) touch screen nominal 120 V, 60Hz* |
| MWA330A-47 | 3-Phase Winding Analyzer, on board industrial computer with 305 mm (12 in.) touch screen nominal 230 V, 50Hz* |
| Included Accessories | AC power cord (IEC60320-C13 to US Standard) (MWA300/330A only)
AC power cord (IEC60320-C13 to EU Standard)
AC power cord (to UK Standard) (MWA300-47 and MWA330A-47 only)
USB 2.0 standard type A to B Cable 2 m (7 ft)
USB memory stick contains: user guide, PowerDB Lite, software related documents
Quick Guide, EN/ES/DE/FR
Ground lead, 9 m (30 ft)
Canvas carrying bag
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Optional Accessories
(3-phase, 4-wire shielded test lead sets compatible with MTO3xx, MWA3xx & TTR3xx series instruments (up to 10A max), complete with color-coded Kelvin clamps)
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| 2008-30-KIT | 3-phase universal, 9 m (30 ft) H & X |
| 2008-60-KIT | 3-phase universal, 18 m (60 ft) H & X |
| 2008-100-KIT | 3-phase universal, 30 m (100 ft) H & X |
| 2008-113-30 | 3-phase universal, 9 m (30 ft) H |
| 2008-114-30 | 3-phase universal, 9 m (30 ft) X |
| 2008-113-60 | 3-phase universal, 18 m (60 ft) H |
| 2008-114-60 | 3-phase universal, 18 m (60 ft) X |
| 2008-113-100 | 3-phase universal, 30 m (100 ft) H |
| 2008-114-100 | 3-phase universal, 30 m (100 ft) X |
| 36486-7 | 3-phase universal,10 m (33 ft) X, Extension |
| 36486-8 | 3-phase universal, 10 m (33 ft) H, Extension |
| 36486-9 | 3-phase universal, 10 m (33 ft) H & X Extension |
| 1007-502 | Remote tap controller, manual operation, model RTC-1, complete with quick guide, and red/black/white (total 3) alligator clips |
| 1004-639 | HV strobe c/w 18 m (60 ft) lead |
| 1006-512-2 | Verification resistor, 10A,10 m ohms |
| 2005-115 | Foam lined transit case |
| Y550055 | Turns ratio calibration standard |
| 2001-766 | Soft padded carrying case |
Note:
* Please refer to Input Power under Specifications above for details.
