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DETAILED OPERATION - Section 4
MTS-1700 SERIES OPERATION AND REFERENCE MANUAL 4-43
CU A002 15A
MANTA TEST SYSTEMS
4.10.4.2
CONTROL OF FREQUENCY AND PHASE ANGLE WHEN USING MULTI-SYSTEM
SYNCHRONIZATION.
The frequency of both systems will be controlled by the first MTS-1710 (designated the “master”). The
master is designated strictly by how the rear interconnecting communication cable is connected. Refer to
Figures 4.27 and 4.28 to determine which system will be the master.
The frequency of the slave system (if set to LINE frequency reference mode) will now follow that of the
master. To verify this:
1.
Turn on both MTS-1700 systems.
2.
Press [FREQ], as required, to select LINE frequency reference mode on the slave MTS-1710 system.
3.
Select VARIABLE frequency reference mode on the master MTS-1710 system.
4.
Turn [PREFAULT] ON (on both MTS-1710s).
5.
Vary the frequency of the master MTS-1710, and the frequency on the slave MTS-1710 should follow
the master.
The frequency in prefault, fault and postfault state of the slave system(s) will follow the frequency set on
the master system in each state respectively. If fault playback mode is activated, the sample rate of the slave
system(s) will follow the sample rate set on the master system.
The phase angle display shown when [PHASE] is pressed is normally the phase angle between the selected
current and voltage (on the same system). As a result, when paralleling the current outputs on multiple MTS-
1700 systems (as described in Section 4.6.10), the phase angle settings on the master and slave systems
should be the same.
If there are basically two (or more) independent three-phase systems (synchronized in frequency), the phase
angle on the master and slave systems can be set independently. The phase angle display shown when
[PHASE] is pressed is normally the phase angle between the selected current and voltage (on the same
system). This means that, to check the absolute phase angle settings, use the displays in the individual phase
adjustment menus, described in Section 5.12.2.1.
If the absolute phase angle of two outputs on two different systems are the same, they will be in phase. The
phase angle settings also can be changed in individual phase adjustment mode (see Sections 5.12.2.1 and
6.7).