GE MI-869 - Inputs

1–24 869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS CHAPTER 1: INTRODUCTION
Inputs
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
CBCT (50:0.025): 0 to 15 A
Short Term CT Withstand: ..............................1 second at 100 x rated current
2 seconds at 40 x rated current
continuous 3 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
1 min/hr at 420 V to neutral
ANALOG INPUTS
Current Input (mA DC):......................................0 to 1mA, 0 to 5mA, 0 to 10mA, 0 to 20mA, 4 to 20mA
(configurable)
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
128 samples per power cycle (available for transient
recorder
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