CHAPTER 11: METERING ARC FLASH
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 11–17
CTS DIFF CURRENT
Range: 0.000 to 120000.000 A in steps of 0.001
Default: 0.000 A
This value is the differential current magnitude between the calculated 3I0 and the
measured ground current
The CTS Diff. Current reflects the quantity obtained based on the Diff. IG Polarity setting
in the differential check section of the CT Supervision element.
Arc Flash
Path: Metering > Arc Flash > Arc Flash 1
HS Phase Current A/B/C
Range: 0.00 to 120000.00 A in steps of 0.01
HS Ground Current
Range: 0.00 to 120000.00 A in steps of 0.01
Sensor 1(X) Light Level
Range: 0.00 to 300000.0 Lu in steps of 0.1
Sensor 1(X) Max Light Level
Range: 0.00 to 300000.0 Lu in steps of 0.1
RTDs
Path: Metering > RTDs
NOTE:
The Temperature can be displayed in Celsius or Fahrenheit. The selection is made in
Setpoints > Device > Installation > Temperature Display.
RTD 1(13)
Range: -40 to 250°C (-40 to 482°F)
Temperatures < -40°C are displayed as “Shorted” and temperatures > 250°C are
displayed as “Open RTD”.
RRTDs
Path: Metering > RRTDs
NOTE:
The Temperature can be displayed in Celsius or Fahrenheit. The selection is made in
Setpoints > Device > Installation > Temperature Display.
RRTD 1(12) 40°C
Range: -40 to 250°C (temperatures < -40°C or temperatures >250°C are displayed as
“Trouble RRTD”)
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