24
251/02 en
9
Fig. 9
Feed the position signal in the form of a 4 ... 20 mA signal to
the regulator at terminals 44-45 (see connection diagram).
6
Parallel operation
zto the second
TAPCON
®
230 VC / VC 100-BU-02
ashielded cable, max. 25 m
Single/parallel
With jumper A: Synchronism "master-follower"
Insert jumper B when negative switching direction desired
4 ... 2
0
mA
Þ
tap pos
ition n
min ...n
m
ax
TACPCON
®
230 VC
6.2.1
System configuration, settings, transfer of
the on-load tap-changer setting
Lead the additional connections/terminals (see
fig. 9
) to the
regulators.
6.2.1.1 Setting the tapping position range
Operate the SELECT key and the
keys to select the
menu point and set the respective lowest/highest tap posi-
tions between –35 and +35 by pressing the SET and
keys. To perform a function check, set the deactivated
transformer for all positions of the entire tap position range
while checking the position indicator.
Since a comparison of the tap positions of the transformers
jointly engaged in parallel operation is performed during
parallel operation in accordance with the principle of
tap-
change synchronicity (Master-Follower)
, it is imperative to
maintain identical position designations for all of these
transformers, and to ensure that the „higher“ and „lower“
signals will effect identical voltage changes in all the
transformers.
If this is not the case, e.g. if the "Higher" command (higher
voltage) is not equal to a higher position, it is also possible to
"turn the tap direction" within the voltage regulator.
This function can be switched on or off by inserting or
removing jumper B.
POS MIN
0
(-35 – 35)
20/30
POS MAX
35
(-35 – 35)
21/30
6.2.1.2 Selecting the Master/Follower operation
SELECT PARALLEL
CIRCUL.REAC.CURR.
CRC/MAST/FOLLOW
19/30
Operate the SELECT key and the
keys to select the
menu point and assign the respective regulator as a Master
or a Follower by pressing the SET and
keys.
If both regulators were assigned as „Follower“ or „Master“
during parallel operation, the regulators will be blocked (see
section 6.3 – Disturbances during parallel operation).
TAPPING DIRECTION
NEGATIVE
POSITIVE / NEGATIVE
22/30