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9 Operation
Maschinenfabrik Reinhausen GmbH 2021
130
7817454/02 EN
TAPCON
®
230 Expert
9.3.4 U bandwidth monitoring
The following limit values are monitored via bandwidth monitoring. The set
bandwidth [
Page 114] (upper/lower) of the voltage regulation is used for
this purpose.
Behavior
If the measured value is higher than the upper limit or lower than the lower
limit, the device triggers the
Upper bandwidth limit value / Lower bandwidth
limit value
message.
The "Function monitoring" function is used to detect long periods when val-
ues are above or below the bandwidth. Long periods when values are above
or below the bandwidth indicate a problem with the device function because
the device is not able to correct the control deviation.
If the value is above or below the set bandwidth [
Page 114], the
Function
monitoring
event is displayed after the set delay time for function monitoring
has elapsed. The event is automatically acknowledged as soon as the mea-
sured value is back within the set bandwidth.
The following parameters are available for setting function monitoring:
▪ Function monitoring
▪ Hysteresis
▪ Delay time
1. Go to
Settings > Parameters > On-load tap-changer regulator > U
bandwidth monitoring
.
2. Select the desired parameter.
3. Set the desired parameter.
4. Press the
Accept
button to save the modified parameter.
You can set additional parameters for each limit value:
Function monitoring
You can use this parameter to activate function monitoring. You can select
the following options:
Setting
Behavior
Off
Function monitoring is deactivated.
Only Auto
Function monitoring is only active in AVR AUTO oper-
ating mode.
Auto and Manual
Function monitoring is active in AVR AUTO and AVR
MANUAL operating modes
Table 46: Activate function monitoring
Hysteresis
You can use this parameter to set the hysteresis. You can use this to avoid
the unnecessary generation of messages if the measured value fluctuates
around a threshold value.