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SPECIFICATIONS
1–16
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
CT FAILURE
Inputs: ...................................................................... Neutral Current IN,
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
BREAKER TRIP COUNTER
Trip Counter Limit (Pickup):............................. 1 to 10000 in steps of 1
LOCKOUT
Function:................................................................. Latch Trip command to Relay 1 TRIP
Operation: .............................................................. Any protection element
COLD LOAD PICKUP BLOCKING
Operation: .............................................................. Automatically (current level), or by command (asserted
Function:................................................................. Block IOC functions, raise TOC pickup, for selected period of
Time Delay Accuracy: ...................................... 0 to 1 cycle (block Time)
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
<16 ms typical at 2 x pickup at 50 Hz
Neutral Current VN (from three-phase VTs)
Ground Current Ig
35 ms at 50 Hz
Block Close to Relay 2 CLOSE
input)
time
±50 ms (outage time ≤5 min)
±1 s (outage time > 5 min)
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 1: INTRODUCTION
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