ABB Relion 650 Series Technical Manual page 717

1MRK 511 424-UEN B
Bay control REC650 2.2 IEC
Technical manual
Table 575: ANSI Inverse time characteristics for Sensitive directional residual overcurrent and
power protection
Function
Operating characteristic:
æ ö
A
ç ÷
= + ×
t B k
( )
ç ÷
-
P
I 1
è ø
EQUATION1249-SMALL V3 EN-US
Reset characteristic:
t r
= ×
t k
( )
2
-
I 1
EQUATION1250-SMALL V1 EN-US
I = I /I
measured set
ANSI Extremely Inverse
ANSI Very inverse
ANSI Normal Inverse
ANSI Moderately Inverse
ANSI Long Time Extremely Inverse
ANSI Long Time Very Inverse
ANSI Long Time Inverse
Inverse time characteristics
Range or value
0.05 ≤ k ≤ 2.00
1.5 x I ≤ I ≤ 20 x I
set set
A=28.2, B=0.1217, P=2.0 ,
tr=29.1
A=19.61, B=0.491, P=2.0 ,
tr=21.6
A=0.0086, B=0.0185, P=0.02,
tr=0.46
A=0.0515, B=0.1140, P=0.02,
tr=4.85
A=64.07, B=0.250, P=2.0,
tr=30
A=28.55, B=0.712, P=2.0,
tr=13.46
A=0.086, B=0.185, P=0.02,
tr=4.6
Section 19
GUID-19F8E187-4ED0-48C3-92F6-0D9EAA2B39BB v4
Accuracy
ANSI/IEEE C37.112 ,
±5.0% or ±160 ms
whichever is greater
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