MR ECOTAP VPD CONTROL PRO, Operating Instructions Manual, Page: 78 / 192

8 Operation
Maschinenfabrik Reinhausen GmbH 2018 78 5252433/02 EN ECOTAP
®
VPD
®
CONTROL PRO
Integral time response With integral time response, the device responds with a variable delay time
depending on the control deviation. The greater the control deviation (ΔU) in
relation to the set bandwidth (B), the shorter the delay time. This means that
the device responds faster to large voltage changes in the grid. Regulation
accuracy improves as a result but the frequency of tap-changes increases
too.
Figure 58: Diagram for integral time response
ΔU/B Control deviation "ΔU" as % of desired value in relation to the set band-
width "B" as % of desired value
1 "Delay time T1" parameter
To set the time response T1, proceed as follows:
1. Go to Settings > Parameters > Control > Time response T1 .
2. Select the option you want.
3. Press the Accept button to save the modified parameter.
8.4.4 Delay time T2
You can use this parameter to set the delay time T2. Delay time T2 is used
to compensate for large control deviations faster.
The delay time T2 only takes effect if more than one tap-change operation is
required to correct the control deviation. The first output pulse occurs after
the set delay time T1. After the set tap-change delay time T2 has elapsed,
additional pulses occur in order to correct the existing control deviation.
The following requirements must be noted to set delay time T2:
▪ The delay time T2 must be greater than the switching pulse time.
▪ The delay time T2 must be greater than the maximum operating time of
the motor-drive unit.
▪ The delay time T2 must be less than the value set for delay time T1.