MR ECOTAP VPD CONTROL PRO Operating Instructions Manual page 85

8 Operation
Maschinenfabrik Reinhausen GmbH 2018
Circuit D
▪ The voltage transformer VT is connected to the phase conductors L1 and
L2.
▪ The current transformer CT is looped into the phase conductor L3.
▪ The current I is ahead of voltage U
L3
phase shift of -90°.
▪ The voltage drop on a phase conductor is determined by the current I
If you use this circuit, set the device as follows:
Parameter
Voltage-transformer circuit
Current-transformer circuit
Phase angle correction
Table 19: Circuit D
Circuit E
▪ The voltage transformer VT is connected to the phase conductors L1 and
L2.
▪ The current transformer CT is looped into the phase conductor L2.
▪ The current I is ahead of voltage U
L2
phase shift of -30°.
▪ The voltage drop on a phase conductor is determined by the current I
5252433/02 EN
-V by 90°. This corresponds to a
L1 L2
Option
3 Ph differential voltage
3 Ph phase current
90°
-U by 30°. This corresponds to a
L2 L1
® ®
ECOTAP VPD CONTROL PRO
.
L3
.
L2
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