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Single-Phase TTR® - Transformer Turns Ratio Test Set

Supplier: Megger playlist_addCompare

The Single-Phase TTR® Transformer Turns Ratio Test Set measures the turns ratio and exciting current of windings in power, potential and current transformers.

Price Guide (Inc GST): POA

The single-phase model is available in either hand-cranked or line-operated versions and measures highly sensitive turns ratios of up to 129.99:1 with accuracy of ±0.1%. An optional auxilary transformer extends the ratio range to 329.99:1.
  • Used for testing single phase power and distribution transformers
  • Design based on precision bridge measuring technique
  • Available in hand-cranked or line-operated models
  • Unmatched accuracy (±0.1%) in a portable design
The TTR set operates on the principle that the voltage ratio of the transformer at no load is practically equal to the true turns ratio.
The major source of error in a transformer is a primary impedance drop due to magnetizing current, which is kept to a minimum by excitation at a fraction of rated voltage. By employing a design that meets both of these conditions along with the use of a null balance system, the turns ratio of a transformer can be determined accurately.