E-2
MTS-1700 SERIES OPERATION AND REFERENCE MANUAL
MANTA TEST SYSTEMS
CU A002 15A
5. When prompted, enter the PC serial port and the communications baud rate to be used.
6. When
prompted,
select
Φ
-N/C-N fault mode and I1-LOW current mode on the front panel of the MTS-
1710.
7. Select the appropriate label (Bus, Generator or Line) for channel A and C voltages beside the Channel
A and Channel C voltage indicators.
8. Fill in the VT Ratios under the Synchronizing Element Settings section. Fill in the remaining
synchronizing element settings. These should be entered as secondary values if you set the VT ratios to
1. Otherwise, enter these as primary values.
9. The Phasor Vdiff setting works as follows: When checked ON, the voltage window is shown as a
circle, indicating that the synchronizing element compares the phasor voltage difference between the
two voltages to the voltage limit. When left OFF, the voltage window is shown as a trapezoid with
circular sides, indicating that the synchronizing element compares the difference of the magnitude of
the two voltages to the voltage limit.
E.3.2 Synchroscope Graph
This graph shows the channel A and C voltage phasor relative positions, plotted against the synchronizing
element window bounded by the voltage window and phase angle window. The bus/line/generator required
voltage minimum limits are also shown as dotted circles. The dotted white phasor shows the anticipated
position of the channel A voltage when the breaker closes.
When the "Autoscale" setting is set off, the controls above this can be used to zoom in on and pan the
graph.
E.3.3 Synchronizing Element Measurements
This section shows the present difference angle, frequency and voltage, as well as the closing angle
(anticipated phase angle of the channel A voltage when the breaker closes).
The "In Sync" indicator illuminates green when the present voltage difference is within the voltage
window setting, and the present frequency difference is within the frequency window setting, as well as
the present phase angle difference within the phase window setting.
E.3.4 Phase Limit Test
To perform this test:
1. Select Setup | Phase limit test from the Syncscope menu bar.
2. Turn the [MODIFY] knob to adjust the phase angle to find the phase angle limit of the synchronizing
element.
E.3.5 Voltage Limit Test
To perform this test:
1.
Select Setup | Voltage limit test from the Syncscope menu bar.
2. Turn the [MODIFY] knob to adjust the voltage up and down to find the voltage limit of the
synchronizing element.