MR ECOTAP VPD CONTROL PRO - Tap Position Capture; Parallel Operation (Optional); Parallel Operation Methods

8 Operation
Maschinenfabrik Reinhausen GmbH 2018 975252433/02 EN ECOTAP
®
VPD
®
CONTROL PRO
8.8 Tap position capture
The current tap position of the on-load tap-changer is transmitted from the
ECOTAP VPD MD&C controller to the CONTROL PRO controller. No further
settings are necessary for this.
8.9 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
8.9.1 Parallel operation methods
You can undertake parallel operation with various parallel operation meth-
ods.
8.9.1.1 Tap synchronization
With the tap synchronization parallel operation method, one voltage regu-
lator works as the master and all others as followers.
Master Follower
Tap position
CAN bus
M AVR MAVR
T1 T2
Figure65: Tap synchronization