MR TRAFOGUARD ISM, Руководство по эксплуатации

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6 Functions and settings
Maschinenfabrik Reinhausen GmbH 2016 100 5163667/00 EN TRAFOGUARD® ISM®
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
L3
is ahead of voltage U
L1
-V
L2
by 90°.
▪ The voltage drop on a phase conductor is determined by the current I
L3
.
If you use this circuit, set the device as follows:
Parameter Option
Voltage-transformer circuit 3 Ph differential voltage
Current-transformer circuit 3 Ph phase current
Phase angle correction 90°
Table 17: 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
L2
is ahead of voltage U
L2
-U
L1
by 30°.
▪ The voltage drop on a phase conductor is determined by the current I
L2
.
If you use this circuit, set the device as follows: