Table of Contents
Line distance protection REL670
Version 2.2
Table 214. ANSI Inverse time characteristics for Voltage restrained time overcurrent 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
Long Time Extremely Inverse
Long Time Very Inverse
Long Time Inverse
Table 215. IEC Inverse time characteristics for Voltage restrained time overcurrent protection
Function
Operating characteristic:
æ
ö
A
ç
÷
=
×
t
k
(
)
ç
÷
P
è
-
ø
I
1
EQUATION1251-SMALL V1 EN-US
I = I
/I
measured
set
IEC Normal Inverse
IEC Very inverse
IEC Inverse
IEC Extremely inverse
IEC Short time inverse
IEC Long time inverse
Hitachi Energy
GUID-2AE8C92E-5DA8-487F-927D-8E553EE29240 v3
Range or value
0.05 ≤ k ≤ 999.00
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
Range or value
0.05 ≤ k ≤ 999.00
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
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1MRK 506 372-BEN Q
Accuracy
ANSI/IEEE C37.112 , ±
5.0% or ±40 ms
whichever is greater
Accuracy
IEC 60255-151, ±5.0%
or ±40 ms whichever is
greater
151
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