Table of Contents
Advertisement
2.13
TECHNICAL SPECIFICATIONS.
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.
PHASE / GROUND TIME OVERCURRENT (51P, 51N)
Current:
Pickup Level:
Dropout Level:
Level Accuracy:
Curve Shapes:
Time Dial:
Reset Type:
Timing Accuracy:
PHASE / GROUND INSTANTANEOUS OVERCURRENT (50PH, 50PL, 50NH, 50NL)
Current:
Pickup Level:
Dropout Level:
Level Accuracy:
Overreach:
Time Delay:
Reset Type:
Operate Time:
Timing Accuracy:
GEK-106273L
PRODUCT DESCRIPTION
Fundamental
0.1 – 2.4 times In (rated current) in steps of 0.01 x In (51P & 51N if
1/5 A ground models)
0.005-0.12 A in (51N if sensitive ground model)
97% typical of Pickup
±1% at In
±3% in the complete range
IEC (B.S.) A/B/C or
ANSI Inverse, Very Inverse or Extremely Inverse (depending on
model)
Time delayed (0.00 to 600.00 sec. in steps of 0.01 sec.
0.05 to 2 in steps of 0.01 for IEC curves
0.5 to 20 in steps of 0.1 for ANSI curves
Instantaneous
±5% of operate time or ±30 ms. (whichever is greater) for I > 1.50
times the Actual Pickup Level.
Fundamental
0.1 to 30.0 times In (rated current) in steps of 0.1 x In.(50PH/PL &
50NH/NL for 1/5 A ground models)
0.005 to 0.12 A (50NH/NL for sensitive ground models)
97% typical of Pickup
±1% at In
±3% in the complete range
< 2%
0.00 to 600.00 sec. in steps of 0.01 s
Instantaneous
Between 20 and 30 ms for I> 1.5 x Actual Pickup @ 60 Hz
±5% of operate time or ±30 ms. (whichever is greater) for I > 1.5
times the Actual Pickup
MIF Digital Feeder Protection
2.13.1.
PROTECTION UNITS
2-17
Advertisement
Table of Contents
