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DETAILED OPERATION - Section 4
4-38
MTS-1700 SERIES OPERATION AND REFERENCE MANUAL
MANTA TEST SYSTEMS
CU A002 15A
4.8.2.1
IN I1-LOW, I1-HIGH & I3 CURRENT MODES.
When the MTS-1710 is first turned on, the default phase angle relationships are as shown below (assuming
that A-N/
Φ
-N fault mode is selected).
In these examples, the current mode is set to I3 which causes the current to be routed to the appropriate [I3
OUTPUT] terminals. These diagrams are still applicable for I1-LOW and I1-HIGH current modes.
0.0
DEG:V-I IST LINE
A-N
Φ
-N I3
Next, if the phase angle is adjusted to 70°, by pressing [PHASE] and turning [MODIFY], the phase of the
current is shifted, and the displays and phase angle relationships appear as follows:
70.0
DEG:V-i IST LINE
A-N
Φ
-N I3
Recall that the phase angle display shows the phase between the selected fault voltage (indicated in the
lower left corner of the [MODE/MENU DISPLAY]), and the current. Next, if the [FAULT PHASE] is
changed to B-N, note that the current is rotated to maintain the phase angle between the faulting phase, and
the current the same. In addition, in I3 current mode, the current will be routed to the [I3 OUTPUT] B and
N terminals.
70.0
DEG:V-I IST LINE
B-N
Φ
-N I3
Similarly, if the [FAULT PHASE] is changed to C-A/
Φ
-
Φ
, the current is rotated to maintain the phase
angle between VCA and the current at 70°.
VA
VB
VC
I
I
VC
VB
VA
0
VA
VB
VC
I
0