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TTR300
Instruction manual
Megger TTR300 Instruction Manual
Transformer ratio test set
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Contents
Table of Contents
Troubleshooting
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Table of Contents
Table of Contents
TTR300 Transformer Test Set
TTR330A Transformer Test Set
Upon Receipt of Product
1 Product Overview 300/330A
Top Panel Controls
Figure 1-1: TTR300 Front Panel
Figure 1-2: TTR330A Front Panel
Figure 1-3: TTR330A Industrial Controller with Display
TTR330A Top Panel Facilities
2 Safety
Safety Is the Responsibility of the User
General Safety Precautions
Input Power Precautions
3 Specifications
Electrical
Input Power
Protective Devices
Output Test Voltage and Current
Test Frequency
Loading of Test Transformer
Measuring Ranges
Accuracy
Measurement Method
Transformer Winding Phase Relationship
Measuring Time
Display
Memory Storage
Communication Interface
Safety/Emc/Vibration
Physical Data
Environmental Conditions
4 Software Installation
Powerdb Lite Setup & Installation (PC Control Only)
Software Installation (PC Portion Only)
5 General Testing Procedures
Site Preparation
Making Circuit Connections
Operating the TTR300/330A
6 THREE-PHASE Transformer RATIO TESTING
Procedure
Figure 6-1: TTR Display on Startup (TTR330A)
Figure 6-2: TTR300/330A Using PC Software
Figure 6-3 Form Selection Table
Test Form Controls - General
Figure 6-4: Header Input
Figure 6-5: Nameplate MINIMUM Input
Figure 6-6: Nameplate Input
Transformer Test Conditions
Instrument Settings Button
Figure 6-7: Transformer Test Conditions
Figure 6-8: Instrument Setup Screen - Test Settings
Figure 6-9: Settings Screen - Form Test Sections for Form Display
Ratio Testing Methods
7 Ratio Transformer Testing Applications
Single-Phase, Two-Winding Transformers -Including Typical Pole Type Transformers with Dual Secondary's
Figure 7-1 Setup for Testing Single-Phase Transformer
Figure 7-2 Setup for Testing Single-Phase Autotransformer
Figure 7-3 Setup for Testing Single-Phase, Type a (Straight Design) Step Voltage Regulator
Figure 7-4 Setup for Testing Single-Phase, Type B (Inverted Design) Step Voltage Regulator
Figure 7-5 Connections to a Pole Type Transformer with 2 Secondary Windings
Three-Phase, Two-Winding Transformers
Figure 7-6 Typical Connection to a 2 Winding Ynyn or Zigzag-8 Terminal Transformer
Figure 7-7 Typical Connection to a Delta Delta or Yy (no Neutral) 6 Terminal Transformer
Three-Phase, Three-Winding Transformers
Current Transformers (Cts)
Unmounted Cts
Figure 7-8 Setup for Testing Unmounted Current Transformer
Figure 7-9 Setup for Testing Taps on Multiple Tap CT
Bushing Current Transformer (BCT) Mounted on Single-Phase, Two-Winding Transformer
Figure 7-10 Setup for Testing BCT Mounted on Single-Phase Two-Winding Transformer
Bushing Current Transformer (BCT) Mounted on Three-Phase Transformers
Figure 7-11 Setup for Testing BCT Mounted on Delta Winding on a Three-Phase Power Transformer
Figure 7-12 Setup for Testing BCT Mounted on Wye Winding of a Three-Phase Transformer
8 Save/Retrieve Results
9 TTR300 - Self Check
Reason for Possible Inaccuracy in 1:1 Self Test
Troubleshooting
10 Ordering Information / Spare Parts
11 Service
Maintenance
Fuse Replacement
Calibration
Repairs
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TTR300_330A-UG-EN-V01
March 2018
Instruction Manual
for
Transformer
Ratio Test Set
TTR300
TTR330A
Catalog Number TTR300
Catalog Number TTR330A
Read this entire manual before operating.
M
Valley Forge Corporate Center
2621 Van Buren Avenue
Norristown, PA 19403-2329
U.S.A.
610-676-8500
www.megger.com
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