S&C IntelliCap Plus, Руководство по устранению неисправностей

Страница: 14 / 26

14 S&C Instruction Sheet 1023-550
Miscellaneous Problems
Capacitor control is not switching the bank automatically
Follow these steps to trouble troubleshoot automatic switching:
STEP 1. Make sure the faceplate AUTO LED display is lit. If the AUTO LED display is off,
press the OPERATION MODE CHANGE button.
Note: If the capacitor control was in Manual mode and is returned to
Automatic mode, it waits 60 seconds before switching the bank.
STEP 2.
Check the Reclose Block field. If a number appears in this field on the Operation
screen, the Reclose Block feature is operating. After the timer runs out, automatic
switching should resume.
STEP 3.
Check for a Voltage-Override condition. On the Operation screen, check for a
voltage-override message. If a Voltage-Override condition is in effect, make sure
the Voltage-Override setpoints are appropriate for this capacitor bank
installation.
STEP 4. Check for a potential Voltage-Override condition. Check the present line voltage
(on the Operation screen), the Voltage-Override setpoints presently in effect,
and the Bank Voltage Rise + Margin setpoint (on Page 1 of the Setup>General
screen). The capacitor control does not switch the bank if doing so would cause a
Voltage-Override condition. See Instruction Sheet 1023-530, “S&C IntelliCap®
Plus Automatic Capacitor Control: Setup ,” for more information.
STEP 5.
Check the number of automatic switching cycles. On the Operation Counters
screen, look at the number of automatic switching cycles (switch in and switch out)
for the day. If the number is equal to (or greater than) the
Maximum Automatic
Control Cycles Per Day setpoint, further switching is inhibited in Automatic
mode until the next calendar day.
STEP 6.
Check whether the bank is scheduled to be active. On Page 4 of the Setup>General
screen, check whether today is a holiday. If the capacitor control is in Timeclock
mode, Time-Biased Voltage mode, or Time-Biased Temperature mode, check
the schedules.
STEP 7. Check for troubleshooting messages. Check for active messages on the
Troubleshooting Event screens. Follow the troubleshooting suggestions for those
messages.
STEP 8. Check manual bank operation. Put the control in Manual mode (the faceplate
MANUAL LED display is lit). Following your company’s procedures, use the
faceplate CLOSE or OPEN button to operate the capacitor bank. If the bank does
not switch, see the “Capacitor bank switch does not operate” section on page 13.