6 Commissioning
Maschinenfabrik Reinhausen 2014
50
222/08 EN
TAPCON® 240
6.
Press
to select auto mode for both devices.
ð
The devices return the on-load tap-changer units to the original tap
positions.
ð
The function test for circulating reactive current sensitivity is complete.
If one of the two on-load tap-changer units switches one or more tap posi-
tions higher and the other switches the same amount lower, you need to re-
duce the value of the circulating reactive current sensitivity [
ter.
After you have set the
circulating reactive current sensitivity
parameter,
continue with the circulating reactive current blocking function test described
in the next section.
Checking circulating reactive current blocking
This section describes how to run the function test for circulating reactive
current blocking.
1.
Press
on one device to select manual mode.
2.
Using manual control, adjust the relevant motor-drive unit upwards by
the maximum permitted tap difference in operating positions between
the parallel operating transformers (for example by 1 - 2 steps).
When setting the circulating reactive current blocking in the following proc-
ess step, wait approx. 2 - 3 seconds between the individual steps.
3.
Set the
parallel operation method
parameter to
circulating reactive
current
.
4.
The
circulating reactive current blocking
parameter should be re-
107] from the set value of 20 % in steps of 1 % until the
Par-
allel operation error: circulating reactive current limit
exceeded
is dis-
played.
ð
The
Parallel operation
LED lights up when the circulating reactive
current blocking limit is reached.
ð
Any further regulation is blocked.
5.
After the set delay time for the parallel operation error message (time
can be adjusted [
109]), the signaling relay UC-X1:1/UC-X1:2 (default
setting) is activated.
6.
Increase the
circulating reactive current blocking
parameter again
until the message
Parallel operation error: circulating reactive current
limit exceeded
disappears.
6.3.3.2
Summary of Contents for tapcon 240
Page 1: ...Voltage Regulator TAPCON 240 Operating Instructions 222 08 EN ...
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