Inputs - GE MI-869 Instruction Manual

SPECIFICATIONS

Inputs

1–24
AC CURRENTS
CT Rated Primary:............................................... 1 to 12000 A
CT Rated Secondary:......................................... 1 A or 5 A based on relay ordering
Burden: .................................................................... < 0.2 VA at rated secondary
Conversion Range:............................................. Standard CT: 0.02 to 46 x CT rating RMS symmetrical
Short Term CT Withstand: .............................. 1 second at 100 x rated current
CBCT (50:0.025) Withstand:............................ continuous 150 mA
AC VOLTAGE
VT Range: ............................................................... 10 to 260 V
Nominal Frequency: .......................................... 20 to 65 Hz
Burden: .................................................................... <0.25 VA at 120 V
Conversion Range:............................................. 1 to 275 V
Voltage Withstand: ............................................ continuous at 260 V to neutral
ANALOG INPUTS
Current Input (mA DC):...................................... 0 to 1mA, 0 to 5mA, 0 to 10mA, 0 to 20mA, 4 to 20mA
Input Impedance: ............................................... 375 Ω ± 10%
Conversion range: .............................................. 0 to +21 mA DC
Accuracy:................................................................ ± 1% of full scale,
Type: ......................................................................... Passive
Analog Input Supply:......................................... +24 V DC at 100 mA max.
Sampling Interval: .............................................. Typically 500 ms
FREQUENCY
Nominal frequency setting: ........................... 50 Hz, 60 Hz
Sampling frequency:......................................... 64 samples per power cycle
Tracking frequency range: ............................. 3 to 72 Hz
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
CBCT (50:0.025): 0 to 15 A
2 seconds at 40 x rated current
continuous 3 x rated current
1 min/hr at 420 V to neutral
(configurable)
128 samples per power cycle (available for transient
recorder
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 1: INTRODUCTION