12 S&C Instruction Sheet 1041-550
Software Troubleshooting and Error Messages
Distribution System Line kV to 120 Vac Base Ratio Voltage
Transformer Wiring
Delta
voltage reporting
Phase-to-Phase voltage / 120 volts* Phase-to-Phase
Wye
voltage reporting
Phase-to-Neutral voltage / 120 volts* Phase-to-Neutral
* For example: 12,000 volt distribution-line voltage / 120 volts = 100/1 ratio.
d. Check the Sensor Conditioning module jumper. Make sure that the correct jumper (wye
or delta) is installed for this distribution line. Make sure that the side of the jumper
with more wire loops (2 loops for wye, 3 loops for delta) is facing towards the bottom
of the enclosure.
Wires & Grounding Type Use
Uni-grounded Wye 3-Wire System Delta jumper(s)
Uni-grounded Wye (Primary Neutral) 4-Wire
System
Delta jumber(s)
Multi-grounded Wye 4-Wire System Wye jumper(s)
Delta System Phase-to-ground connected sensors
should not be used with ungrounded
delta systems.
OVERCURRENT FAULT LED failed to show a load-side fault
a. Check whether the fault was logged. Check the OVERCURRENT FAULT: Fault Events
screen to see whether the switch control detected and took action on the fault. If it
logged the fault, go to Step B. If not, go to Step C.
b. Check when the fault cleared. Check the OVERCURRENT FAULT: Fault Events screen
to see whether the fault was cleared. For a normally closed switch, the faceplate
OVERCURRENT FAULT LED turns off when all of the following are true:
• Three-phase line voltage has been sensed
• The switch is closed
• Forty-five minutes have elapsed
The LED also turns off when the switch is closed and someone toggles the faceplate
REMOTE/LOCAL switch, or clears the LED via SCADA.
For the normally open switch, the LED turns off when you do one of the following:
• Toggle the REMOTE/LOCAL switch or clear the LED via SCADA. The line switch
can be open or closed.
• Close the switch from the faceplate or via SCADA.
NOTE: You cannot clear the LED via SCADA if the REMOTE/LOCAL switch is in
the LOCAL position.
c. Check the SETUP: Fault Detection screen settings. If no fault was recorded, check
the values for the Fault Detection Current Level setpoints, and the Fault Duration
Time Threshold setpoints on the SETUP: Fault Detection screen.
Miscellaneous Problems
To Next Page
Loading...
Need help?
General
