OPERATION SUMMARY - Section 3
3-36 MTS-1700 SERIES OPERATION AND REFERENCE MANUAL
MANTA TEST SYSTEMS
CU A002 15A
FIGURE 3.17 GROUND FAULT OVERVOLTAGE RELAY
3.3.13.1 SETUP.
1. Select static operation mode and turn [PREFAULT] off. Connect the relay, as shown in Figure 3.17.
2. Using the menu, select SETTINGS MODES FREQ SYNCHRONIZING ON to enable synchronizing
mode. This mode allows Vc to be fixed at the fundamental while the other outputs may be at a
harmonic frequency.
3. Turn [PREFAULT] on, and select
Φ
-N/C-N fault mode. Note that the frequency reading is the
fundamental (60 Hz or 50 Hz).
4. Press [VOLTAGE], and set the inhibit voltage for the 27S element above the inhibit level.
59N
& 27N
(3rd harmonic)
27S
GROUND FAULT
OVERVOLTAGE
RELAY
Va at 3rd harmonic or fundamental
Vc at fundamental frequency
Select 0-N C-N or A-N to display/adjust
corresponding voltage
Select frequency and
turn [MODIFY] to select
harmonic
Enable synchronizing mode via menu