ABB Relion Technical Manual page 746

Section 21
Time inverse characteristics
740
Table 574: ANSI Inverse time characteristics
Function
Operating characteristic:
æ ö
A
ç ÷
= + ×
t B td
( )
ç ÷
P
è - ø
I 1
EQUATION1651 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
Table 575: IEC Inverse time characteristics
Function
Operating characteristic:
æ ö
A
ç ÷
= ×
t td
( )
ç ÷
P
-
è ø
I 1
EQUATION1653 V1 EN
I = I /I
measured set
IEC Normal Inverse
IEC Very inverse
IEC Inverse
IEC Extremely inverse
IEC Short time inverse
IEC Long time inverse
The parameter setting Characterist1 and 4/Reserved shall not be used,
since this parameter setting is for future use and not implemented yet.
Range or value
td = (0.05-999) in steps of 0.01
A=28.2, B=0.1217, P=2.0
A=19.61, B=0.491, P=2.0
A=0.0086, B=0.0185, P=0.02,
tr=0.46
A=0.0515, B=0.1140, P=0.02
A=64.07, B=0.250, P=2.0
A=28.55, B=0.712, P=2.0
A=0.086, B=0.185, P=0.02
Range or value
td = (0.05-999) in steps of 0.01
A=0.14, P=0.02
A=13.5, P=1.0
A=0.14, P=0.02
A=80.0, P=2.0
A=0.05, P=0.04
A=120, P=1.0
1MRK 502 048-UUS A
Accuracy
-
Accuracy
-
Technical manual