SymCom 777-TS, Руководство по установке, Страница: 14 / 16

- 14 -
1/05
CLEARING LAST FAULT
The last fault stored can be cleared on the MotorSaver® by following these steps:
1. Rotate the MODE SELECT switch to GF.
2. Press and hold the RESET/PROGRAM button. Adjust the DISPLAY/PROGRAM adjustment until
“cLr” appears on the display. Release the RESET/PROGRAM button.
To verify the last fault was cleared, place the MODE SELECT switch in the RUN position. Then
press and hold the RESET/PROGRAM button, “cLr” should be on the display.
TAMPER GUARD
The MotorSaver’s setpoints can be locked to protect against unauthorized program changes.
1. Rotate the MODE SELECT switch to GF.
2. Press and hold the RESET button. Adjust the DISPLAY/PROGRAM knob until “Loc” appears on
the display.
3. Release the RESET button.
4. Turn MODE SELECT switch to RUN.
The program is now locked, but all settings can be viewed. The unit can be unlocked by following
the same steps except adjust the DISPLAY/PROGRAM knob to “unL” in step 2.
GROUND FAULT TESTING PROCEDURE
A ground fault test must be performed before installing the MotorSaver® as required by
UL1053 and NEC, ANSI/NFPA 70.
1. Disconnect power
2. Hook up the three line voltages to L1, L2, and L3 as required by the installation instructions.
3. Program the desired parameters into the unit. For test purposes, set MULT to 1 and GF to the
minimum allowed setting.
4. Construct the circuit, using an AC power supply. This circuit simulates a ground fault condition by
generating a current in one of the phases. Alternate test circuits may be used. The only
requirement is the current through the current transformer must be between 115% and 150% of
the GF setting and pass through only one CT window.