MR ETOS TD, Руководство по эксплуатации

Страница: 164 / 356

9 Visualization
Maschinenfabrik Reinhausen GmbH 2020 164 4453918/14 EN ETOS
®
TD
▪ The voltage transformer VT is connected to the phase conductor L1 and
the neutral conductor.
▪ The current transformer CT is looped into the phase conductor L1.
▪ The voltage U and current I are in phase.
▪ The voltage drop on a phase conductor is determined by the current I
L1
.
If you use this circuit, set the device as follows:
Parameter Option
Voltage-transformer circuit 3 Ph phase voltage
Current-transformer circuit 3 Ph phase current
Phase angle correction 0°
Table 44: Circuit 1-B
Circuit 1-C
L1
L2
L3
U
L1
I
L1
VT
CT1
U
L1
I
L1
I
L2
I
L3
U
L3
U
L2
CT2
U
L1
-U
L2
-U
L2
I
L1
-I
L2
-I
L2
UI
L N k l
▪ 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 paral-
lel (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 45: Circuit 1-C