Skip to content

Engineering Certainty Through Integration

M2K Technology & Trading Co. — home
Advanced electrical test instruments Vanguard

Vanguard TRF-250 Three-Phase Transformer Turns Ratio Finder

TRF-250

TRF-250 Three-Phase Transformer Turns Ratio Finder

The 250V Test Voltage Advantage The TRF-250 is Doble's fourth generation transformer turns ratio tester. This latest design provides a higher turns-ratio test voltage of 250Vac, provides a wireless Bluetooth PC interface, and.

Request a quote Datasheets & manuals
M2K engineers testing a distribution transformer with Vanguard instruments at Energypac

Overview

The 250V Test Voltage Advantage The TRF-250 is Doble's fourth generation transformer turns ratio tester. This latest design provides a higher turns-ratio test voltage of 250Vac, provides a wireless Bluetooth PC interface, and features a 44-key "QWERTY"-style membrane keyboard. All these

The 250V test voltage provided by the TRF-250 provides more accurate test results when measuring the transformer turns ratios of very large transformers with a built-in LTC. The three gures below show the turns ratio test results and corresponding percentage error of a 600MVA transformer with an LTC in the Lowest position using 40V, 100V, and 250V test voltages. At the 250V test voltage, the percentage error is less than 0.5% as speci ed in IEC 60076-1 and IEEE

Test results using 40V test voltage Test results using 100V test voltage The TRF-250 determines the turns ratio of the transformer under test using the IEEE C57.12.90 measurement method. The turns-ratio range is from 0.8 to 50,000 to 1. Transformer turns ratio, excitation current, and winding polarity are displayed on the built-in 128 x 64 pixels graphic LCD screen. The TRF-250 can be used as a standalone unit or can be computer-controlled.

Key capabilities

  • Ratio range: 0.8 ¬ 50,000 : 1
  • Capable of detecting 130 different
  • 4 test voltages: 4Vac, 40Vac,
  • Phase angle and excitation current
  • Bluetooth and USB PC interfaces
  • 4.5" wide thermal printer (optional)

Specification

Indicative specification for Vanguard TRF-250 Three-Phase Transformer Turns Ratio Finder

Indicative specification for guidance. Confirm the current manufacturer datasheet for the configuration being quoted.

Typical applications

Request for quotation

Quote for Vanguard TRF-250 Three-Phase Transformer Turns Ratio Finder

The product is already filled in. Tell us the application and we will come back with a configuration and price.
What do you need?
Your details

Related

More in advanced electrical test instruments

View category