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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.