DETAILED OPERATION - Section 4
4-34
MTS-1700 SERIES OPERATION AND REFERENCE MANUAL
MANTA TEST SYSTEMS
CU A002 15A
4.7.1
Φ
-N Fault Type
The
Φ
-N fault type allows display and adjustment of any single
Φ
-N voltage, and allows simulation of
single phase faults. This fault type should be selected to set the nominal
Φ
-N voltages.
The prefault settings of VAN, VBN and VCN set in
Φ
-N fault type determine the maximum voltages that
can be obtained in the
Φ
-
Φ
and 3
Φ
fault types. These settings are known as nominal
Φ
-N voltages.
The MTS-1710 default settings for the prefault
Φ
-N voltages is 69.3V for all phases.
Once the fault, (and postfault, if desired)
Φ
-N voltages is set, it can be applied to any desired phase (A-N,
B-N, or C-N) by changing the [FAULT PHASE] selector.
4.7.2
Φ
-
Φ
Fault Type
The
Φ
-
Φ
fault type allows collapsing of a phase-to-phase voltage from the nominal value. When this fault
type is selected, turning the [MODIFY] knob simultaneously changes the amplitude and phase of two
selected
Φ
-N voltages, resulting in a change of the
Φ
-
Φ
voltage.
Once the prefault, fault (and postfault, if desired) voltages are set, they can be applied to any two desired
phase (A-B, B-C, C-A) by changing the [FAULT PHASE] selector.
4.7.3
3
Φ
-(
Φ
-
Φ
) Fault Type
The 3
Φ
-(
Φ
-
Φ
) fault type allows collapsing of the entire 3
Φ
voltage triangle from the nominal
Φ
-N
voltages. If I3 current mode is selected, the current path will be the
Φ
-
Φ
path selected by the [FAULT
PHASE] selector.
When this fault type is selected, turning the [MODIFY] knob simultaneously changes the amplitude of all
three phases of voltage. This allows simulation of three phase faults.
The (
Φ
-
Φ
) description indicates that the voltage being measured and displayed is a
Φ
-
Φ
voltage, although
all three voltages are being varied simultaneously. Any
Φ
-
Φ
voltage (A-B, B-C, C-A) can be monitored by
changing the [FAULT PHASE] selector.
4.7.4
3
Φ
-(
Φ
-N) Fault Type
The 3
Φ
-(
Φ
-N) fault type is the same as the 3
Φ
-(
Φ
-
Φ
) fault type, except that the voltage being monitored is
any of the
Φ
-N voltages.
Any
Φ
-N voltage (A-N, B-N, C-N) can be monitored by changing the [FAULT PHASE] selector. In
addition, if I3 current mode is selected, the current path will be a
Φ
-N path versus a
Φ
-
Φ
path for 3
Φ
-
(Φ
-
Φ)
fault types.
4.7.5
2
Φ
-N Fault Type
The 2
Φ
-N fault type simulates 2
Φ
-N faults by allowing adjustment of any two
Φ
-N voltages
simultaneously.
