Transformer Testing

GD700A Transformer Turns Ratio Tester

Portable transformer turns ratio (TTR) tester for ratio, vector group and excitation current measurement. Designed for field commissioning and preventive maintenance where a full test bench is not available.

GD700A Transformer Turns Ratio Tester
Standards
IEC 60076-1 · GB/T 1094.1
Applications
Field commissioning · Preventive testing · Troubleshooting

Overview

Portable transformer turns ratio (TTR) tester for ratio, vector group and excitation current measurement. Designed for field commissioning and preventive maintenance where a full test bench is not available.

Applicable Standards

  • IEC 60076-1
  • GB/T 1094.1

Application Scenarios

Field commissioningPreventive testingTroubleshooting

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Frequently Asked Questions

What does a turns ratio tester measure on a transformer?
A TTR tester applies a voltage to one winding and measures the induced voltage on the other to determine the turns ratio, verify the vector group, and record excitation current. Deviation from the nameplate ratio indicates winding or tap changer defects.
Is this TTR tester suitable for on-site field testing?
Yes. The instrument is portable and intended for field commissioning, preventive testing and troubleshooting where a stationary test bench is impractical.
Which standards apply to transformer turns ratio testing?
Ratio and vector group verification is performed per IEC 60076-1 and GB/T 1094.1. We confirm the applicable clauses and tolerance limits against your specification before delivery.

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