5 Mounting
Maschinenfabrik Reinhausen GmbH 2020
36
1800138/08 EN
TAPMOTION
®
ED
the opposite direction until the indicator is in the mid-position of the area
marked in gray on the tap-change indicator. Check the coupling again as
described previously.
17. The pointer of the tap-change indicator must be in the mid-position of the
area marked in gray once the on-load tap-change operation with the
hand crank is complete.
Figure 18: Pointer in the mid-position
18. Once coupling is complete in both directions, check by undertaking sev-
eral on-load tap-change operations and check that the on-load tap-
changer and motor-drive unit are in the same tap position.
Cable recommendation
Electromagnetic interference on signal lines, which can be expected due to
the environment of the transformer, can disrupt the proper operation of the
motor-drive unit.
That is why Maschinenfabrik Reinhausen GmbH recommends using shield-
ed signal lines when possible.
NOTICE
Damage to the device!
Current flow through the shielding of signal lines can lead to the device get-
ting damaged.
► For signal lines between the motor-drive unit and transformer, connect
the shielding of the signal line to the motor-drive unit only.
► For all other signal lines, connect the shielding on both sides, as long as
there is no potential difference between the two devices. If there is a po-
tential difference, then connect the shielding only on one side for these
signal lines, too.
Circuit
Function
Cable type
Motor circuit
Power supply
Unshielded, separate cable
Control circuit
Power supply
Unshielded, separate cable
Tap-change supervisory control
Shielded
Pulse circuit, raise/lower
Shielded
Trigger circuit Q1-Off
Shielded
5.4
