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On-load tap-changer in reactor technology

Your benefits at
a glance

  • Compact design
  • Maintenance-free for up to 500,000 tap-change operations with no time component (applies only to the version with model B monitoring system)
  • Quick switching times
  • Internal oil heating system for use in arctic conditions
  • RMT use as a retrofit solution for Westinghouse UTT on-load tap-changer insert
  • Intended as a replacement for reactor switches such as RNT or RNO
  • Field experience: Over 12,000 in use worldwide

Technical Data

Max. rated through-current 2,500 A
Max. rated step voltage Tap-to-Tap 2,000 V
Max. rated switching capacity 2,500 kVA
Max. voltage for operational equipment Um 72.5 kV
Application: At any selectable winding position.
Operating positions without change-over selector max. 17
Operating positions with change-over selector max. 33

Product description

Our first reactance on-load tap changer with vacuum interrupters and the most impressive performance history since its introduction by the end of the 1980ies. Area of application: primarily North America.