CHAPTER 1: INTRODUCTION SPECIFICATIONS
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–29
ARC FLASH SENSOR/FIBER
Number of Point Sensors: ...............................4
Detection Radius:................................................180 degree
Maximum Fiber Length (Point Sensor): .....18 ft
Fiber Size:................................................................1000 um
Mode:........................................................................Multi-mode
Connector:..............................................................Small Media Interface (SMI)
Fiber Type:..............................................................Plastic Optical Fiber
Bend Radius: .........................................................>25 mm
CONTACT INPUTS
Number of Inputs:...............................................Based on relay ordering
Type: .........................................................................Wet or Dry
Wet Contacts: .......................................................300 V DC maximum
Selectable thresholds:.......................................17, 33, 84, 166 VDC
Tolerance:...............................................................±20%
Recognition time:................................................1 ms (typical)
Debounce time: ...................................................0.0 to 16.0 ms in steps of 0.5 ms
Continuous current draw (burden): ............2 mA
CLOCK
Setup:........................................................................Date and Time, Daylight Saving Time, UTC (Coordinated
Universal Time)
Backup Retention: ..............................................1 hour
IRIG-B INPUT
Auto-detect: ..........................................................DC and AM
Amplitude Modulation:.....................................1 V to 10 V pk-to-pk
DC Shift:...................................................................TTL
Input Impedance:................................................40 kΩ
Isolation:..................................................................2 kV
RTD INPUTS
Types (3-wire): ......................................................100 Ω Platinum, 120 Ω Nickel, 100 Ω Nickel, 10 Ω Copper
Sensing current:...................................................5 mA
Range: ......................................................................–40 to +250°C (-40 to +482°F)
Accuracy:................................................................±2°C (±4°F)
Isolation:..................................................................36 V pk-pk (a group of RTDs to ground)
Lead Resistance:..................................................25 Ohms max. per lead for platinum or nickel and 3 Ohms
max. per lead for copper RTDs
Outputs
ANALOG OUTPUTS
Range (configurable):........................................0 to 1mA, 0 to 5mA, 0 to 10mA, 0 to 20mA, 4 to 20mA
Max. load resistance:.........................................10 kΩ @ 1 mA,
600 Ω @ 20 mA
Accuracy:................................................................± 1% of full scale
Isolation:..................................................................500V DC for one minute (functional isolation between analog
inputs and output group; and each group of chassis)
Driving Signal:.......................................................any Analog quantity
Sampling Interval: ..............................................Typically 500 ms
Upper and lower limit
(for the driving signal):................................-90 to 90 pu in steps of 0.001
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