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7 Functions and settings
Maschinenfabrik Reinhausen 2014
79
222/08 EN
TAPCON® 240
Parameter
Function
Off
The device uses the relative limit values [%] you have
entered
On
The device uses the absolute limit values [V] you have
entered
Table 14: Selection between relative and absolute value
To activate/deactivate the absolute limit values, proceed as follows:
1.
>
Parameter >
Limit values.
ð
Absolute limit values.
2.
Press
for
On
setting or
for
Off
setting.
3.
Press
.
ð
The absolute limit value is activated/deactivated.
Setting undervoltage monitoring V<
You can use these parameters to set the limit values for an undervoltage.
Undervoltage monitoring prevents tap-change operations if there is a power
cut.
If the measured voltage U
actual
falls below the set limit value
, the red
LED
U<
lights up . The switching pulses to the motor-drive unit are blocked
at the same time provided you have activated the blocking undervoltage U<
parameter. Once the set signaling delay time [
has passed, the
signaling relay activates. The
Undervoltage U<
message appears in the
display. The message is reset as soon as the measured voltage U
actual
again
exceeds the limit value for undervoltage
. If the measured voltage U
actual
falls below 30 V
(for example when the transformer is switched off), the
Undervoltage
message is also displayed. You can however suppress
7.5.2
Behavior