GE 869 Instruction Manual page 27

CHAPTER 1: INTRODUCTION
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
PHASE UNDERVOLTAGE (27P)
Voltage:....................................................................Fundamental Phasor Magnitude
Minimum Voltage:...............................................0.00 to 1.50 x VT in steps of 0.01 x VT
Pickup Level:..........................................................0.00 to 1.50 x VT in steps of 0.01 x VT
Dropout Level: ......................................................102 to 103% of Pickup
Level Accuracy:....................................................±0.5% of reading from 10 to 208 V
Phases Required for Operation: ...................Any one, Any two, All three
Undervoltage Curves: .......................................Definite Time, GE IAV Inverse Time or FlexCurves A/B/C/D
Pickup Time Delay:.............................................0.000 to 6000.000 s in steps of 0.001s
Operate Time:.......................................................< 20 ms at 0.90 x pickup at 60 Hz
Curve Timing Accuracy: ..................................at < 0.90 x pickup: ± 3.5% of curve delay or ± ½ cycle
PHASE OVERVOLTAGE (59P)
Voltage:....................................................................Fundamental Phasor Magnitude
Pickup Level:..........................................................0.02 to 3.00 x VT in steps of 0.01 x VT
Dropout Level: ......................................................97 to 98% of Pickup
Level Accuracy:....................................................±0.5% of reading from 10 to 208 V
Phases Required for Operation: ...................Any one, Any two, All three
Pickup Time Delay:.............................................0.000 to 6000.000 s in steps of 0.001s (Definite Time)
Dropout Time Delay: .........................................0.000 to 6000.000 s in steps of 0.001s (Definite Time)
Pickup Accuracy:.................................................Per phase voltage input channel error
Operate Time:.......................................................< 25 ms at 1.1 x pickup at 60Hz
Timer Accuracy: ..................................................± 3% of delay setting or ± ¼ cycle (whichever is greater)
REACTIVE POWER (40Q)
Operating Condition:.........................................Three-phase reactive power
Positive/Negative var Trip/Alarm Pickup
Level:....................................................................0.02 to 2.00 x Rated in steps of 0.01
Positive/Negative var Trip/Alarm Pickup
Level:....................................................................1 to 25000 kvar in steps of 1 kvar
Pickup Level Accuracy: ....................................±1.0% of reading
Positive/Negative var Trip/Alarm Pickup
Delay: ..................................................................0.00 to 600.00 s in steps of 0.01 s
Timer Accuracy: ..................................................±3.0% of delay time or ±10 ms, whichever is greater
Hysteresis:..............................................................2 to 3%
Operate Time:.......................................................< 45 ms at 60 Hz
Elements: ................................................................Trip and Alarm
RTD PROTECTION
Pickup:......................................................................1°C to 250°C in steps of 1°C
Hysteresis:..............................................................2°C
Timer Accuracy: ..................................................<2 s
Elements: ................................................................Trip and Alarm
< 25 ms at 0.90 x pickup at 50 Hz
(whichever is greater) from pickup to operate
< 30 ms at 1.1 x pickup at 50Hz
from pickup to operate
< 50 ms at 50 Hz
SPECIFICATIONS
1–17