ABB RELION REB500 Applications Manual page 37

1MRK 505 403-UEN Rev. C
Function/ Parameter
Over and undercurrent detection
Single or three-phase measurement with detection of the highest, respectively lowest phase current
2nd harmonic restraint for high inrush currents
Four independent parameter sets
Accuracies
Accuracy of the pick up setting (at f
Table 15:
Function/ Parameter
Inverse time characteristic
(according to B.S. 142, IEC 60255-3 with extended setting
range):
normal inverse
very inverse
extremely inverse
long time inverse
or RXIDG characteristic
Number of phases
Base current I
Pick up current Istart
Min. time setting tmin
k1 setting
Single or three-phase measurement with detection of the highest phase current
Four independent parameter sets
Table 16:
Function/ Parameter
Current
Angle
Delay
Wait time
Memory duration
Voltage input range
Voltage memory range
Response time without delay
Directional overcurrent protection with detection of power flow direction
Back-up protection
Four independent parameter sets
Three-phase measurement
Suppression of DC and HF components
Definite time characteristic
Voltage memory for near faults
Selectable response when power direction no longer valid (trip or block)
Accuracies
Table continues on next page
Bay protection functions REB500
Application manual
)
N
Inverse time overcurrent protection 51 (PTOC)
B
Directional overcurrent definite time protection 67 (PTOC)
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BP-Additions to base documentation
Range/ Value
Value
±5%
Range/ Value
C
t = k / ((I/I ) - 1)
1 B
c = 0.02
c = 1
c = 2
c = 1
t = 5.8 - 1.35 x l (I/I )
n B
1 or 3
0.04 to 2.5 I in steps of 0.01 I
N
1 to 4 I in steps of 0.01 I
B B
0 to 10 s in steps of 0.1 s
0.01 to 200 s in steps of 0.01 s
Range/ Value
0.02 to 20 I in steps of 0.01 I
N
-180° to +180° in steps of 15°
0.02 to 60 s in steps of 0.01 s
0.02 to 20 s in steps of 0.01 s
0.2 to 60 s in steps of 0.01 s
0.005 to 2 UN
<0.005 UN
65 ms
Classes/ Value
Section 6
N
N
31