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OTI & WTI (TPR-501-R)

Transformer Protection Relay (OTI & WTI) TPR-501 series is designed for the safe operation of oil-cooled power transformers. It is suitable for a marshalling box as well as a control room installation. It is designed for long and trouble-free operation under extreme conditions associated with a transformer.

Standard Features

  • Enclosure is designed for IP-55 protection.
  • Isolated 4-20mA and RS-485 remote outputs
  • 85 - 440 VAC/DC Universal power supply. Due to this wide range supply, TPR-201 performs well in phase imbalance conditions.
  • Display Oil and Winding temperature simultaneously.
  • CT and dT(Gradient) are site selectable
  • Fully user programmable
  • Advanced Anticipatory fan control for the long life of the transformer
  • Fan Exerciser facility ensures the operation of the fan for long life with less maintenance
  • Maximum temperature storage capacity and reading can be recalled after the power fails.
  • A facility is provided to reset the maximum temperature for fresh recordings.
  • Fault indication is provided for Sensor open, short, over or under temperature conditions


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