GE 350-A9

1–16 350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS CHAPTER 1: INTRODUCTION
BREAKER FAILURE (50BF)
Pickup Level: ......................................................... 0.05 to 20.00 x CT in steps of 0.01 x CT
Dropout Level:...................................................... 97 to 98% of pickup
Timer 1 Delay:......................................................0.03 to 1.00 s in steps of 0.01 s
Timer 2 Delay:......................................................0.00 to 1.00 s in steps of 0.01 s
Time Delay Accuracy:......................................0 to 1 cycle (Timer 1, Timer 2)
Level Accuracy: ...................................................per CT input
Reset Time:............................................................<14 ms typical at 2 x pickup at 60 Hz
<16 ms typical at 2 x pickup at 50 Hz
CT FAILURE
Inputs: ......................................................................Neutral Current IN,
Neutral Current VN (from three-phase VTs)
Ground Current Ig
Time Delay: ...........................................................0.00 to 60.00 s in steps of 0.01 s
3IO level accuracy: ............................................ per CT inputs
3VO level accuracy:...........................................per VT inputs
GND current level accuracy:.........................see the specifications for phase and ground current inputs
Operate Time: ...................................................... 30 ms at 60 Hz
35 ms at 50 Hz
BREAKER TRIP COUNTER
Trip Counter Limit (Pickup):.............................1 to 10000 in steps of 1
LOCKOUT
Function:.................................................................Latch Trip command to Relay 1 TRIP
Block Close to Relay 2 CLOSE
Operation: ..............................................................Any protection element
COLD LOAD PICKUP BLOCKING
Operation: ..............................................................Automatically (current level), or by command (asserted
input)
Function:.................................................................Block IOC functions, raise TOC pickup, for selected period of
time
Time Delay Accuracy:......................................0 to 1 cycle (block Time)
±50 ms (outage time ≤5 min)
±1 s (outage time > 5 min)
FUSE FAIL (VTFF)
Time Delay: ...........................................................1 s
Timing Accuracy:................................................±0.5 s
Elements:................................................................Trip or Alarm
AMBIENT TEMPERATURE
High Temperature Pickup:.............................. 20°C to 80°C in steps of 1°C
Low Temperature Pickup:...............................-40°C to 20°C in steps of 1°C
Time Delay: ...........................................................1 to 60 min in steps of 1 min
Temperature Dropout:......................................Configurable 90 to 98% of pickup
Temperature Accuracy:...................................±10°C
Timing Accuracy:................................................±1 second