9 Visualization
Maschinenfabrik Reinhausen GmbH 2020
165
4453918/14 EN
ETOS
®
TD
Circuit 1-D
L1
L2
L3
U
L1
VT
CT
U
L1
I
L1
I
L2
I
L3
U
L3
U
L2
U
L1
-U
L2
-U
L2
I
L3
UI
L
N
k
l
▪ 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°. This corresponds to a
phase shift of -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 46: Circuit 1-D
Circuit 1-E
L1
L2
L3
U
L2
VT
CT
U
L1
I
L1
I
L2
I
L3
U
L3
U
L2
U
L2
-U
L1
-U
L1
I
L2
UI
L
N
k
l
▪ 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°. This corresponds to a
phase shift of -30°.
▪ The voltage drop on a phase conductor is determined by the current I
L2
.
Summary of Contents for ETOS TD
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