Operation
S&C Instruction Sheet 716-500 29
Understanding the Optional Remote Gas-
Density Monitor
The remote gas-density monitor provides local and remote
indication of the gas-density in each interrupter in terms
of percent full. The system can be wired to provide remote
indication of the gas density of each interrupter via three
analog 0 to 1.0 mA dc outputs. The LCD screen provides
indication of gas density and alarms for each interrupter. The
remote gas-density monitor transmits updated measurements
approximately once per hour.
The remote gas-density monitor has three available alarm
contacts. The system provides both local and remote indica-
tion of alarms.
Level 1 alarm indicates that an interrupter is leaking. The
circuit-switcher can still be operated, but the leaking inter-
rupter should be replaced promptly.
Level 2 alarm indicates that an interrupter has lost enough
SF6 gas that it can no longer clear faults properly.
The System Trouble alarm indicates a problem with the
monitoring system. A System Trouble alarm will activate
when the receiver fails to receive a signal for over 24 hours.
The System Trouble alarm will also activate when there are
approximately three months or less of battery life remaining.
At first, a Low-Battery alarm will appear locally. After the
battery has completely discharged, an Error message will
appear in place of the percent-gas-density information, and
the System Trouble alarm will signal remotely.
For complete instructions on installing, operating, and
troubleshooting the optional remote gas-density monitor,
refer to S&C Instruction Sheet 716-530.
Inspection Recommendations
To ensure Series 2000 Circuit-Switcher’s continued proper
performance, it should be inspected in accordance with S&C
recommended schedule and procedures contained in S&C
Instruction Sheet 716-590.
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