GE 869 Instruction Manual page 28

SPECIFICATIONS
1–18
SHORT CIRCUIT
Inputs: ...................................................................... RMS Phase Currents
Pickup Level: ......................................................... 1.00 to 30.00 x CT in steps of 0.01 x CT
Dropout Level:...................................................... 97 to 98% of Pickup
Pickup Delay:........................................................ 0.00 to 180.00 s in steps of 0.01 s
Level Accuracy: ................................................... For 1.0 to 2.0 x CT: ±0.5% of reading or ±0.4% of rated,
Operate Time: ...................................................... <16 ms @ 60Hz (I > 2.0 x PKP), with 0 ms time delay
Timer Accuracy:.................................................. ±3% of delay setting or ±1/2 cycle (whichever is greater)
Elements: ................................................................ Trip or Alarm
THERMAL MODEL (49)
Thermal Overload Curves:.............................. Motor curve, FlexCurve, Standard Motor curve with voltage
Motor Curve Time Multiplier:......................... 0.00 to 25.00 in steps of 0.01
FlexCurve Time Multiplier: .............................. 0.00 to 600.00 in steps of 0.01
IEC Curve Time Constant: ............................... 0 to 1000 in steps of 1
Thermal Overload Pickup: .............................. Overload factor x FLA
Overload Factor (OL): ........................................ 1.00 to 1.50 in steps of 0.01
Motor Full Load Current (FLA): ...................... 1 to 5000 A in steps of 1
Standard Overload Curve, Cutoff
Effect:.................................................................
Standard Overload Curve, Shift
Effect:.................................................................
Motor Rated Voltage:........................................ 1 to 50000 V in steps of 1
Thermal Model Biasing: ................................... Current Unbalance, RTDs
Thermal Model Update Rate: ........................ 1 power cycle
Stopped/Running Cool Time Constants:.. 1 to 1000 min. in steps of 1
Stopped/Running Cool Time Constant
Decay: ................................................................ Exponential
Hot/Cold Safe Stall Ratio: ................................0.01 to 1.00 in steps of 0.01
Current Accuracy: .............................................. Per phase current inputs
Current Source:.................................................... True RMS
Timer Accuracy:.................................................. ±100 ms or ±2%, whichever is greater
Timer Accuracy for Voltage Dependent
Overload:........................................................... ±100 ms or ±4%, whichever is greater
UNDERCURRENT (37)
Operating Parameter: ...................................... Per-phase current Ia, Ib, Ic (Phasor)
Trip/Alarm Pickup Level:.................................. 0.10 to 0.95 x FLA in steps of 0.01 x FLA
Dropout Level:...................................................... 102 to 103% of Pickup
Trip/Alarm Time Delay:.................................... 0.00 to 180.00 s in steps of 0.01 s
Pickup Accuracy: ................................................ For 0.1 to 2.0 x CT: ±0.5% of reading or ±0.4% of rated,
Operate Time: ...................................................... <45 ms at 60 Hz,<50 ms at 50 Hz
Timer Accuracy:.................................................. ±3% of delay setting or ± 2 power cycles (whichever is
Stages: ..................................................................... Trip and Alarm
whichever is greater For > 2.0 x CT: ±1.5% of reading
<20 ms @ 50Hz (I > 2.0 x PKP), with 0 ms time delay
from pickup to operate
dependent function, FlexCurve with voltage dependent
function, IEC curve
whichever is greater
greater) from pickup to operate
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 1: INTRODUCTION