8 Commissioning
Maschinenfabrik Reinhausen GmbH 2022
79
8595028/00 EN
TAPCON
®
250
8.3.3 Checking parallel operation
To ensure that parallel operation functions correctly, the device must be
commissioned in independent mode. Make sure that the conditions below
have been met.
▪ All devices are set to the same operating parameters for "desired value"
▪ The "Activate parallel operation" parameter is set to
ON
▪ The desired Parallel operation method is selected.
▪ A different CAN bus address (≠ 0) is set for all devices.
▪ All devices are in the same parallel operation group:
– With parallel operation detection via group input: A signal is present at
the same group input on all devices.
8.3.3.1 Testing circulating reactive current minimization
Note that the following prerequisites must be met for the "circulating reactive
current minimization" parallel operation method:
▪ You must use current transformers with the same connection values for all
transformers in parallel operation.
▪ If you wish to operate the device in parallel operation with existing de-
vices, you must activate the Retrofit TAPCON® 250 parameter.
Consult the section Circulating reactive current minimization for more infor-
mation.
To set the circulating reactive current sensitivity, proceed as follows:
1. Select the "Circulating reactive current" parallel operation method.
2. Set circulating reactive current sensitivity to a value of 0%.
3. If necessary, activate the Retrofit TAPCON® 250 function.
4. Adjust both transformers in independent mode to the same actual voltage
using the on-load tap-changers.
5. Connect the transformers in parallel and enable parallel control.
ð
The status display in the
Parallel operation
menu lights up blue.
ð
Both devices must be within the bandwidth.
6. Set the desired value of both TAPCON® devices to the voltage currently
measured.
7. On one of the two transformers, raise the tap position of the on-load tap-
changer by one setting; on the second transformer, lower the tap position
of the on-load tap-changer by one setting.
ð
Both devices remain within the bandwidth.
8. Increase the circulating reactive current sensitivity in small steps until the
control deviation dU in the main screen is outside the bandwidth (depend-
ing on the device, greater than or less than the bandwidth).
Содержание TAPCON 250
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