On-load Tap-Changers

Vacuum type OLTCs
SF6 Gas Insulated Vacuum Type OLTCs
Arcing contacts in oil OLTCs

De-energized Tap-Changers

Series PBVE
Series PBV
Series PBVKL

Drive units

Hand Drive
Motor Drive

Hand Drive


Hand drive unit ZR 03

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The hand drive unit ZR 03 is the universal drive unit for all Elprom off-circuit tap changers from the PBV, PBVE, PBVKL series.

Revolutions of manual crank per tap-change operation

11 revs

Torque of driving shaft (max value at force 200 N, applied to the handle)

40 Nm

Control circuit voltage

AC 230 V

Insulation level

2 kV

Number of service tap positions (max)


Heating element power

10 W


12 kg