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TPI Auxiliary Switch

The Tap Position Indicator (TPI) switches found on old power transformers present a number of ongoing maintenance & reliability problems due to:

  1. Open frame design leave the contacts susceptible to contamination & degradation;
  2. Age of the equipment has resulted in mechanical wear (backlash) in the mechanism;
  3. The introduction of voltage transducers to interface the TPI to SCADA generally provide inadequate voltage & current levels to achieve reliable contact whetting;
  4. The age of the equipment makes maintenance a hit & miss affair with problems occurring & disappearing for no apparent reason. These issues lead to reliability problems by way of out of step alarms, loss of remote tap position indication etc. The 4M900 TPI Selector Switch provides a complete replacement system, which rectifies the root cause of these problems.

Features

  • Gold plated contacts for low resistance & reliable operation
  • Rugged construction
  • Sealed switch body
  • One or two switch "gangs"
  • Up to 22 tap switch positions
  • Plug in screw terminal blocks
  • Custom mechanical couplings
  • Custom mounting brackets
  • Optional resistor box for TPI transducer interface
  • Made in Australia

 

 

 

 

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©1998-2012 Relay Monitoring Systems Pty. Ltd.      ACN 052 484 483     ABN 76 052 484 483

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