ABB Relion 670 Series Product Manual page 54

Phasor measurement unit RES670
Pre-configured
Product version: 1.2
Inverse characteristic
Table 64. ANSI Inverse time characteristics
Function
Operating characteristic:
æ ö
A
ç ÷
= + ×
t B k
( )
ç ÷
P
è - ø
I 1
EQUATION1249-SMALL V1 EN
Reset characteristic:
t r
= ×
t k
( )
2
-
I 1
EQUATION1250-SMALL 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
54
Range or value
k = (0.05-999) in steps of 0.01
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
1MRK 511 266-BEN -
Accuracy
-
ANSI/IEEE C37.112, 5%
+ 40 ms
ABB