GE 869 - Page 22

1–12 869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS CHAPTER 1: INTRODUCTION
CURRENT UNBALANCE (46)
Unbalance: ............................................................Unbal = (I
2
/ I
1
) x A
factor
x 100%
A
factor
= (I
avg
/ FLA) if l
avg
< FLA
A
factor
= 1 if l
avg
>= FLA
Trip/Alarm Pickup Level:..................................4.0 to 50.0% in steps of 0.1%
Trip Operating Curves: .....................................Definite Time: T=TDM sec
Inverse Time: T= (TDM/[Unbal]
2
) sec
Trip Pickup Delay:............................................... 0.00 to 180.00 s in steps of 0.01 s when Trip Curve = Definite
Time
Trip Time Dial Multiplier (TDM):.....................0.00 to 180.00 in steps of 0.01 when Trip Curve = Inverse
Curve
Trip Maximum Time: ......................................... 0.00 to 1000.00 s in steps of 0.01 s
Trip Minimum Time:...........................................0.00 to 1000.00 s in steps of 0.01 s
Trip Reset Time:...................................................0.00 to 1000.00 s in steps of 0.01 s
Alarm Time Delay:..............................................0.00 to 180.00 s in steps of 0.01 s
Single Phasing Pickup Level: ......................... unbalance level > 40% or when I
avg
>=25%FLA and current
in any phase is less than the cutoff current
Single Phasing Time Delay: ...........................2 seconds
Pickup Accuracy: ................................................±2%
Operate Time: ...................................................... <2 cycles at 1.10 x pickup (NOTE 1)
Timing Accuracy:................................................±3% of delay setting time or ± 20 ms, whichever is greater
Element: ..................................................................Trip and Alarm
Single Phasing Element: .................................. Trip
DIRECTIONAL POWER (32)
Measured Power:................................................ 3-phase
Number of Stages: .............................................2
Characteristic Angle:.........................................0º to 359º in steps of 1°
Calibration Angle: ...............................................0.00º to 0.95º in steps of 0.05°
Power Pickup Range: ........................................ –1.200 to 1.200 x Rated Power in steps of 0.001
Pickup Level Accuracy:....................................± 1% or ± 0.001 x Rated Power, whichever is greater
Hysteresis: .............................................................2% or 0.001 x Rated Power, whichever is greater
Pickup Time Delay: ............................................0.000 to 6000.000 s in steps of 0.001 s
Operate Time: ...................................................... < 55 ms at 1.1 x pickup at 60 Hz
< 65 ms at 1.1 x pickup at 50 Hz (NOTE 1)
Timer Accuracy:..................................................± 3% of delay setting or ± ¼ cycle (whichever is greater)
from pickup to operate
FLEXELEMENTS
Number of elements:........................................8
Operating signal: ................................................Any analog actual value, or two values in a differential mode
Operating signal mode:...................................Signed, or Absolute value
Operating mode:.................................................Level, Delta
Comparison direction:...................................... Over, Under
Pickup Level: .........................................................-30.000 to 30.000 pu in steps of 0.001 pu
Hysteresis: .............................................................0.1 to 50.0% in steps of 0.1%
Delta dt:...................................................................40 msec to 45 days
Pickup and dropout delays:...........................0.000 to 6000.000 s in steps of 0.001 s