MR TAPCON - Page 84

7 Commissioning
Maschinenfabrik Reinhausen GmbH 202084 3587317/21 ENTAPCON
®
7.5.3.2 Testing the circulating reactive current blocking limit
This section describes how to run the function test for circulating reactive
current blocking.
ü Set the circulating reactive current blocking limit to a value of 20%
[►Page 189].
1. Press on a TAPCON® to select manual mode.
2. Using manual control, adjust the relevant motor-drive unit upwards (for ex-
ample 1...2 steps) by the maximum permitted tap difference in operating
positions between the parallel operating transformers.
When setting the circulating reactive current blocking in the following
process step, wait approximately 2 to 3 seconds between the individual
steps.
3. In the Parallel operation > Parallel operation method menu item, set
the circulating reactive current parallel operation method.
4. Reduce the circulating reactive current blocking limit parameter from the
set value of 20% in steps of 1% until the message Circulating reactive cur-
rent blocking limit exceeded is displayed.
ð Any further regulation is blocked.
ð After the set delay time for the parallel operation error message has
elapsed, the circulating reactive current blocking message is displayed.
5. Increase the circulating reactive current blocking limit parameter again un-
til the message Circulating reactive current limit exceeded disappears.
6. Press to select auto mode.
ð The motor-drive unit automatically returns to the original operating posi-
tion.
7. Set the value determined for the "circulating reactive current blocking
limit" for the TAPCON® units in parallel operation as well.
If one TAPCON® or all of the TAPCON® units indicate Circulating reactive
current blocking limit exceeded even though the control inputs are correctly
connected for all TAPCON® units, all of the TAPCON® units block.
This could be due to various causes. Further information is given in the
chapter Troubleshooting [►Section 10, Page 274].
ð The function test for the circulating reactive current blocking limit is com-
plete.
7.5.3.3 Checking tap synchronization method
This section describes how to run the function test for tap synchronization
(master/follower).