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Megger MWA300 Series User Manual
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MWA300-UG-EN-V
2
November 2016
Instruction Manual
for
Three-Phase Ratio &
Winding Resistance
Transfor
mer Test Set
MWA300 series
Catalog Numbers. MWA300, MWA300-47
HIGH-VOLTAGE EQUIPMENT
Read this entire manual before operating equipment
Valley Forge Corporate Center
2621 Van Buren Avenue
Norristown, PA 19403-2329
U.S.A.
610-676-8500
www.megger.com
2
Table of Contents
Default Chapter
5
Table of Contents
5
1 MWA300 Product Overview
9
2 Safety
11
3 Specifications
13
Input Power
13
Protective Devices (Fuses)
13
Output AC Test Voltage and Current
13
Test Frequency
13
Loading of Test Transformer
14
Accuracy
14
DC Output Current (User Selectable Ranges)
15
Open Circuit Test Voltage
15
Measurement Voltage
15
Max Power
15
Resistance Ranges
15
4 Software Installation
17
Getting Started
19
5 Three Phase Ttr & Winding Resistance Testing
23
Select 3Ɵ Turns Ratio & Winding Resistance Form
23
Test Form Controls - General
24
Form Settings
25
Tap Settings
26
Resistance/Ratio Settings
27
Transformer Nameplate
28
Transformer Test Conditions
29
Ratio Test Set up
29
Ratio Test
30
Winding Resistance Testing
31
Method 1 - Resistance Test Wizard
32
Method 2 - Measuring Tap - All Phases Winding Resistance
33
Method 3 - Measuring Individual Tap Winding
33
Resistance Test Screen
34
6 Transformer Testing Applications - Ratio & Winding
37
7 Test & Results Files - Saving and Retrieving
51
Saving Results/Test Files
51
Retrieving Results/Test Files
52
8 Service
55
Calibration
55
Ratio Portion - Self Check
56
Reason for Possible Inaccuracy in 1:1 Self-Test
56
Error Messages
57
9 Ordering Information / Spare Parts
61
4
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Megger MWA300 Series Specifications
General
Frequency Range
50/60 Hz
Display
Backlit LCD
Data Storage
USB
Interfaces
USB
Operating Temperature
50°C
Storage Temperature
-20°C to +60°C
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