MR TAPCON 250 - Page 78

8 Commissioning
Maschinenfabrik Reinhausen GmbH 202278 8595028/00 ENTAPCON
®
250
4. Select the Measured values menu item to display the operating values
for current and power and compare them with the values of the operation
measurement instruments.
5. Control the on-load tap-changer manually using the or keys
until the measured voltage U
actual
reaches the desired voltage U
desired
("de-
sired value1").
6. Set the desired value to the value you want.
7. Set the bandwidth depending on the step voltage.
8. Set the delay time T1 to 20seconds [►Page 140].
9. Set the time response T1 to linear [►Page 140].
10. Press to raise the on-load tap-changer one step.
11. Press to select auto mode.
ð If the actual voltage is outside the bandwidth, the device returns the
on-load tap-changer to the original operating position after 20sec-
onds.
12. Press to select manual mode.
13. Press to lower the on-load tap-changer one step.
14. Press to select auto mode.
ð If the actual voltage is outside the bandwidth, the device returns the
on-load tap-changer to the original operating position after 20sec-
onds.
15. Press to select manual mode.
16. Set the delay time T2 to 10seconds and activate it [►Page 141].
17. Press twice to raise the on-load tap-changer two steps.
18. Press to select auto mode.
ð If the actual voltage is outside the bandwidth, after 20seconds the de-
vice lowers the on-load tap-changer one step and after another
10seconds another step.
19. Press to select manual mode.
20. Set the delay time T1 [►Page 140] and delay time T2 [►Page 141] to
the desired value.
We recommend a temporary setting of 100seconds for delay time T1 when
commissioning the transformer. Depending on the operating conditions, you
can also specify the delay time following a longer observation period. In this
regard, it is useful to register how the actual voltage progresses and the
number of tap-change operations per day.