11 Inspection and maintenance
Maschinenfabrik Reinhausen GmbH 2020 3676385142/08 EN ETOS
®
ED
11 Inspection and maintenance
This chapter contains information about inspecting and maintaining the prod-
uct.
11.1 Care
You can clean the outside of the motor-drive unit's protective housing with a
damp cloth. You can clean the inside of the protective housing with a dry
cloth.
11.2 Inspection
Carry out the following inspections on the motor-drive unit within the speci-
fied intervals:
Interval Action Detail
For checking operations
on the transformer
Visual checks ▪ Check the gaskets of the protective housing of the motor-
drive unit.
▪ Check the function of the electrical heater in the protective
housing of the motor-drive unit.
Contact Maschinenfabrik Reinhausen GmbH if the gaskets or
heater are not in perfect condition.
Annually Checking the motor pro-
tective switch
ü The motor protective switch Q1 is switched on (position I).
1. Trip the motor protective switch from the control room.
ð The motor protective switch is tripped (position O). If
the motor protective switch is not tripped, check the
switch's connection to the control room and if neces-
sary contact Maschinenfabrik Reinhausen GmbH.
2. Switch on the motor protective switch again (position I).
ð The tripping process for the motor protective switch from
the control room is checked.
Every 4 years Check ▪ Check the control cabinet for soiling, damage and corro-
sion, and clean it.
▪ Have the potential connections and groundings checked by
an electrically skilled person.
Table135: Inspection plan
11.3 Maintenance
Maintenance of the motor-drive unit is not required. The condition of the mo-
tor-drive unit and its correct function must, however, be checked in accor-
dance with the section "Tests on the motor-drive unit" each time the on-load
tap-changer / de-energized tap-changer/ motor-drive unit is maintained.
Furthermore, certain components of the motor-drive unit (e.g. cam switches,
relays, contactors) have to be replaced every 1 million tap-change opera-
tions. Contact the Technical Service department of Maschinenfabrik Rein-
hausen GmbH for information regarding this.
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