ABB Relion 670 series Product Manual page 70

Line distance protection REL670 ANSI
Pre-configured
Product version: 1.2
Inverse characteristic
Table 83. ANSI Inverse time characteristics
Function
Operating characteristic:
æ ö
A
ç ÷
= + ×
t B td
( )
ç ÷
P
è - ø
I 1
EQUATION1651 V1 EN
Reset characteristic:
t r
= ×
t td
( )
2
-
I 1
EQUATION1652 V1 EN
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
70
Range or value
td = (0.05-999) in steps of 0.01 unless otherwise
stated
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
td=(0.05-999) in steps of 0.01
A=0.086, B=0.185, P=0.02, tr=4.6
1MRK 506 317-BUS A
Accuracy
-
ANSI/IEEE C37.112,
class 5 + 40 ms
ABB