MR TRAFOGUARD ISM, Руководство по эксплуатации

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6 Functions and settings
Maschinenfabrik Reinhausen GmbH 2016 99 5163667/00 EN TRAFOGUARD® ISM®
Parameter Option
Voltage-transformer circuit 3 Ph phase voltage
Current-transformer circuit 3 Ph phase current
Phase angle correction 0°
Table 15: Circuit B: 1-phase measurement in 3-phase grid
Circuit C:
▪ The voltage transformer VT is connected to the phase conductors L1
and L2.
▪ The current transformer CT1 is looped into the phase conductor L1 and
CT2 into the phase conductor L2.
▪ The current transformers CT1 and CT2 are connected crosswise in par-
allel (total current = I
L1
+ I
L2
).
▪ The total current I
L1
+ I
L2
and voltage U
L1
-U
L2
are in phase.
▪ The voltage drop on a phase conductor is determined by the current: (I
L1
+ I
L2
) / √3.
If you use this circuit, set the device as follows:
Parameter Option
Voltage-transformer circuit 3 Ph differential voltage
Current-transformer circuit 3 Ph total current
Phase angle correction 0°
Table 16: Circuit C