MTS-1720 TWO CHANNEL CURRENT SOURCE - Section 9
9-8 MTS-1700 SERIES OPERATION AND REFERENCE MANUAL
MANTA TEST SYSTEMS
CU A002 15A
Note that the connection to the neutral terminal, In, must always be made. Note that this is the same external
connections as when the MTS-1710 is used alone. Also note that using the MTS-1720 effectively doubles
the current output compliance voltage for testing
Φ
-
Φ
relay elements (to 88Vrms), compared to the MTS-
1710 alone (44Vrms).
The compliance voltage for each current output is 44Vrms. For
Φ
-
Φ
elements, the currents in the two faulted
phases may be placed 180
°
relative to each other, thereby achieving twice the compliance voltage.
Impedance relays with neutral or residual current coils (such as those by GEC) should be connected, as
shown in Figure 9.5.