Table 697:
RI and RD type inverse time characteristics for Line Differential protection
Function
Range or value
Accuracy
RI type inverse characteristic
=
×
-
1
0.236
0.339
t
td
I
EQUATION1656 V1 EN
I = I
measured
/I
set
td = (0.05-2.00) in steps of 0.01
IEC 60255-151, ± 5.0%
or ± 40 ms whichever is
greater
RD type logarithmic inverse characteristic
=
-
×
æ
ö
ç
÷
è
ø
5.8
1.35
t
I
In
td
EQUATION1657 V1 EN
I = I
measured
/I
set
td = (0.05-999) in steps of 0.01
Table 698:
ANSI Inverse time characteristics for Sensitive directional residual overcurrent and power
protection
Function
Range or value
Accuracy
Operating characteristic:
(
)
=
+
×
-
æ
ö
ç
÷
ç
÷
è
ø
1
P
A
t
B
td
I
EQUATION1651 V1 EN
Reset characteristic:
( )
=
×
-
2
1
tr
t
td
I
EQUATION1652 V1 EN
I = I
measured
/I
set
0.10 ≤ k ≤ 2.00
1.5 x I
set
≤ I ≤ 20 x I
set
ANSI/IEEE C37.112 ,
±5.0% or ±160 ms
whichever is greater
ANSI Extremely Inverse
A=28.2, B=0.1217, P=2.0 , tr=29.1
ANSI Very inverse
A=19.61, B=0.491, P=2.0 , tr=21.6
ANSI Normal Inverse
A=0.0086, B=0.0185, P=0.02,
tr=0.46
ANSI Moderately Inverse
A=0.0515, B=0.1140, P=0.02,
tr=4.85
ANSI Long Time Extremely Inverse
A=64.07, B=0.250, P=2.0, tr=30
ANSI Long Time Very Inverse
A=28.55, B=0.712, P=2.0, tr=13.46
ANSI Long Time Inverse
A=0.086, B=0.185, P=0.02, tr=4.6
Section 24
1MRK 511 365-UUS A
Inverse time characteristics
844
Phasor measurement unit RES670 2.1 ANSI
Technical manual
Содержание Relion 670 Series RES670
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