OPERATION SUMMARY - Section 3
3-42 MTS-3000 SERIES OPERATION AND REFERENCE MANUAL
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CU M004 01A
3.3.16.2 OVERVOLTAGE PICKUP TEST.
1.
If you haven’t done so, perform Steps 1-3 of section 3.3.16.1 above.
2.
Enable the AC outputs by pressing ENABLE. Energize the outputs by pressing and holding FAULT.
Select A channel voltage by pressing F1 on the voltage module, and raise the voltage with the
MODIFY knob until the relay operates.
3.
Release the FAULT button.
3.3.16.3 OVERVOLTAGE TIMING TEST.
1.
If you haven’t done so, perform Steps 1-3 of section 3.3.16.1 above.
2.
Press and hold the FAULT button, and turn the MODIFY knob to raise the A channel voltage to the
desired level. Release the FAULT button.
3.
Press the FAULT button momentarily and release it. The outputs will seal in until the relay operates,
tripping off the outputs and recording the time.
3.3.16.4 UNDERVOLTAGE INHIBIT TEST.
1.
To pick up the relay, repeat Steps 1-2 of the Overvoltage Pickup Test section 3.3.16.2 above.
2.
Select the channel B voltage adjust mode by pressing F2 on the voltage module. Lower the inhibit
element voltage by turning the MODIFY knob counterclockwise until the relay drops out and restrains.
This level is the inhibit threshold.
3.3.17 DC Auxilliary/Time-Delay Relay Test
3.3.17.1 PICKUP TEST.
FIGURE 3.24 DC RELAY PICKUP TEST
1.
Ensure the DC voltage output is selected to OFF before connecting the relay, as shown. Press the ON
switch on the DC Volts module, if necessary, until the status LED above it is extinguished.
2.
Set the DC voltage to below the expected operate point. Press SET on the DC Voltage module and
adjust the DC voltage level, as required, with the MODIFY knob or keypad.