A 300A on-load tap-changer for tapped transformers with medium output rates.


Technical Data

Max. rated through-current 300 A
Max. rated step voltage 3,300 V
Max. rated switching capacity 1,000 kVA
Max. voltage for operational equipment Um 72.5-245 kV
Application Star point (neutral point) Single-phase design at any selectable winding position.
Operating positions without change-over selector 14 max.
Operating positions with change-over selector 27 max.


MR has successfully manufactured and sold VACUTAP®-brand vacuum tap changers, which offer countless advantages over oil-based technology, for many years.
This is why many clients around the world have fully switched to vacuum technology from MR.
In light of this, we have removed the OILTAP® MS on-load tap changer from our product range and will be stopping series production as of December 31, 2020.

As part of our after-sales services, we will of course continue to provide spare parts, repair services and expert technical support beyond the discontinuation date.