The motor drive unit MZ 4.4 is the universal drive unit for all Elprom tap changers. It can be used for tap changers made by other manufacturers, as well as for retrofit purposes.
The MDU enclosure is made of aluminium alloy. The front panel is protected from the environment by a protective cover. The motor drive unit is equipped with a lighting unit, a power outlet, a document pocket, etc. by default. Additional functions can be added to the MDU according to the customer's requirements.
|Electrical motor rated power||0,75 / 1,1 kW (0,9/1,3 for 60 Hz)|
|Rated frequency||50 / 60 Hz|
|Supply voltage||3 AC 380/400 V|
|Synchronous speed||1500 min -1 (1800 for 60 Hz)|
|Revolutions of hand crank per tap change operation||33 revs|
|Revolutions of outgoing shaft per tap change operation||33 revs|
|Drive shaft torque||17 / 24 Nm|
|Duration of the tap change operation||4,5 s|
|Maximum number of operating positions||35|
|Control circuit voltage||AC 220/230 V|
|Insulation level of voltage Ph - PE||2,5 kV|
|Heater elements power||300 W|
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