MR TAPCON 250 - Page 140

9 Operation
Maschinenfabrik Reinhausen GmbH 2022140 8595028/00 ENTAPCON
®
250
The bandwidth must always be greater than the following value:
|
± B
|
≥ 0,6×
U
n - 1
- U
n
U
N
×100%
U
n-1
Step voltage of tap position n-1
U
n
Step voltage of tap position n
U
N
Nominal voltage
The following transformer values are used to determine the minimum band-
width:
Nominal voltage U
N
= 11000V
Step voltage in tap position 4 U
Step4
= 11275V
Step voltage in tap position 5 U
Step5
= 11000V
Delay time T1
Delay time T1 delays the issuing of a tap-change command for a defined pe-
riod. This prevents unnecessary tap-change operations if the tolerance
bandwidth is exited briefly.
Response to delay time T1
If the control variable is within the set bandwidth , no control com-
mands are issued to the motor drive unit for the tap change. Control com-
mands will also not be issued to the motor-drive unit if the control variable
returns to the bandwidth within the set delay time T1 . However, if the
control variable deviates from the set bandwidth for a long period , a tap-