ABB RELION 630 Series Technical Manual page 333

1MRS757256 F
PML630/Compact Load-Shedding Solution
Technical Manual
 
 
 
A
[ ] = + ⋅
t s B k
 
c
 
I
 
 −
 1
 
>
 
 
I
GUID-B1368633-DB3A-4922-AB7D-A14F1284C6C9 V1 EN
t[s] Operate time in seconds
I measured current
I> set Start value
Time multiplier
k set
Curve name A
(1) ANSI Extremely 28.2
Inverse
(2) ANSI Very Inverse 19.61
(3) ANSI Normal 0.0086
Inverse
(4) ANSI Moderately 0.0515
Inverse
(6) Long Time 64.07
Extremely Inverse
(7) Long Time Very 28.55
Inverse
(8) Long Time Inverse 0.086
(9) IEC Normal Inverse 0.14
(10) IEC Very Inverse 13.5
(11) IEC Inverse 0.14
(12) IEC Extremely 80.0
Inverse
(13) IEC Short Time 0.05
Inverse
(14) IEC Long Time 120
Inverse
The maximum guaranteed measured current is 50 x In for the current
protection. When the set Start value exceeds 1.00 x In, the turn point
where the theoretical IDMT characteristics are leveling out to the
definite time can be calculated with the formula as shown in the
Equation
×
50 In
int =
Turn po
Start value
GUID-B91C49EE-1714-4E58-AEC1-8519CAE57EEE V1 EN
General function block features
B
0.1217
0.491
0.0185
0.1140
0.250
0.712
0.185
0.0
0.0
0.0
0.0
0.0
0.0
21.
Section 9
(Equation 20)
C
2.0
2.0
0.02
0.02
2.0
2.0
0.02
0.02
1.0
0.02
2.0
0.04
1.0
(Equation 21)
327