The upgrade solution for Westinghouse UTT/UVW and Reinhausen RMT-I.

Your benefits at
a glance

  • It is an economic retrofit solution
  • The solution is based on proven OLTC technology
  • Draining of the transformer main tank oil is not necessary
  • No welding on the transformer or OLTC compartment required


Technical Data

Max. voltage for equipment Um* 15 KV
Max. OLTC through-current 1000 A / 1250 A**
Maximum rated tap-to-tap voltage 600 V
Max. number of positions 33
Maintenance-free switching operations 500,000
Time per operation approx. 2,5 sec
* In accordance with IEC 60214-1, chapter 3.57: highest effective value for phase-to-phase voltage in a three-phase system for which an on-load tap-changer is designed with respect to its insulation
** 1320 A upon request

Product description

Many Westinghouse UTTs were placed in service more than 40 years ago. Spare parts are costly and increasingly difficult to obtain. Experts are retiring and technical expertise is being lost quickly.
In view of this problem, with VACUTAP® UTT-LTX MR offers a state-of-the-art retrofit solution that ensures the long-term reliability of your transformer fleet.