MR ETOS IM - Parallel Operation Functions (Optional)

7 Operation
Maschinenfabrik Reinhausen GmbH 2019 1375163667/06 EN ETOS
®
IM
7.6.3 Setting the switching direction
You can use this parameter to set the switching direction. This lets you ad-
just the behavior of the device based on how your on-load tap-changer and
motor-drive unit are configured. You can select the following options:
Setting Meaning
Standard The device issues a signal via the Raise output to increase the
voltage.
The device issues a signal via the Lower output to reduce the
voltage.
Swapped The device issues a signal via the Lower output to increase
the voltage.
The device issues a signal via the Raise output to reduce the
voltage.
Table42: Behavior
To set the switching direction, proceed as follows:
1. Go to Settings > Parameters > Motor control > Switching direction.
2. Select the option you want.
3. Press the Accept button to save the modified parameter.
7.7 Parallel operation (optional)
Parallel transformer operation is used to increase the throughput capacity or
short-circuit capacity at one location. The device provides you with specific
functions for regulating transformers.
Conditions for parallel
operation
Compliance with the following general conditions is required for operating
transformers in parallel:
▪ Identical rated voltages
▪ Transformer power ratio (<3:1)
▪ Maximum deviation of short-circuit voltages (U
K
) for transformers con-
nected in parallel <10%
▪ Same number of switching groups
▪ For parallel operation with CAN communication: Current transformers with
the same rated values must be used for all devices operating in parallel
7.7.1 Parallel operation methods
You can undertake parallel operation with various parallel operation meth-
ods.