5 Commissioning
Maschinenfabrik Reinhausen 2014 492374092/04 EN TAPCON® 260
4. The circulating reactive current blocking parameter should be re-
duced [► 93] 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 [► 95]), 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.
7. Press to select auto mode.
ð The motor-drive unit automatically returns to the original operating
position.
8. Set the value determined for the circulating reactive current blocking
on the devices in parallel operation as well.
If one or all devices indicate Parallel operation error: circulating reactive cur-
rent limit exceeded although the control inputs are correctly connected for
all the devices, then all the devices block.
This could be due to various causes. Further information is given in the
chapter Troubleshooting [► 139].
ð The function test for circulating reactive current blocking is complete.
Checking tap synchronization method
This section describes how to run the function test for tap synchronization
(master/follower). If instances arise where a follower switches in the opposite
direction to the master step change, then the setting for the tapping direction
[► 61] parameter on the follower must be changed from Default to Swap-
ped.
NOTICE
Damage resulting from formation of circulating reactive current
If the parameters are not set correctly, damage may result from the forma-
tion of circulating reactive current and the resulting overload of transmission
lines and transformers.
► Check transformer type plate.
► Set device parameters in accordance with transformer configuration.
Before starting the function test, you must carry out the following steps:
1. Assign the master function to one device.
2. Assign the follower function to the other devices.
5.3.3.3
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