Numerical generator protection
ABB Switzerland Ltd
Utility Automation
REG316*4
1MRK502004-Ben
Page 27
Table 39: Power function (32)
tripping angle 0° to 180° in steps of 1°
n1 0 to 20 in steps of 1
n2 0 to 20 in steps of 1
t-reset 0.5 s to 25 s in steps of 0.01 s
· Measurement of real or apparent power
· Protection function based on either real or apparent power measurement
· Reverse power protection
· Over and underpower
· Single, two or three-phase measurement
· Suppression of DC components and harmonics in current and voltage
· Compensation of phase errors in main and input c.t’s and v.t’s
Settings:
Power pick-up -0.1 to 1.2 S
N
in steps of 0.005 S
N
Characteristic angle -180° to +180° in steps of 5°
Delay 0.05 to 60 s in steps of 0.01 s
Phase error compensation -5° to +5° in steps of 0.1°
Rated power S
N
0.5 to 2.5 U
N
· I
N
in steps
of 0.001 U
N
· I
N
Reset ratio 30% to 170% in steps of 1%
Accuracy of the pick-up setting ±10% of setting or 2% U
N
· I
N
(for protection c.t.’s)
±3% of setting or 0.5% U
N
· I
N
(for core-balance c.t.’s)
Max. operating time without intentional
delay
70 ms
Table 40: Breaker-failure protection (50BF)
Features
· Individual phase current recognition
· Single or three-phase operation
· External blocking input
· Two independent time steps
· Remote tripping adjustable simultaneously with retripping or backup tripping
· Possibility of segregated activating/deactivating each trip (Redundant trip, retrip, backup trip and remote
trip).
Settings
Current 0.2 to 5 I
N
in steps of 0.01 I
N
Delay t1 (repeated trip) 0.02 to 60 s in steps of 0.01 s
Delay t2 (backup trip) 0.02 to 60 s in steps of 0.01 s
Delay tEFS (End fault protection) 0.02 to 60 s in steps of 0.01 s
Reset time for retrip 0.02 to 60 s in steps of 0.01 s
Reset time for backup trip 0.02 to 60 s in steps of 0.01 s
Pulse time for remote trip 0.02 to 60 s in steps of 0.01 s
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