ABB RELION 670 Series Technical Manual page 1399

1MRK 502 066-UUS B
Table 1083:IEC Inverse time characteristics for Voltage restrained time overcurrent protection
Function
Operating characteristic:
æ
ç
=
t
(
ç
è
I
EQUATION1653 V1 EN-US
I = I
measured
IEC Normal Inverse
IEC Very inverse
IEC Inverse
IEC Extremely inverse
IEC Short time inverse
IEC Long time inverse
Table
1084:
Function
Type A curve:
=
t
æ
V
ç
è
EQUATION1661 V1 EN-US
V = V
measured
Type B curve:
t =

 32

EQUATION1662 V2 EN-US
Type C curve:
t =

 32

EQUATION1663 V2 EN-US
Programmable curve:
=
t
æ
ç
B
è
EQUATION1664 V1 EN-US
Technical manual
ö
A
÷
×
td
)
÷
P
- ø
1
/I
set
Inverse time characteristics for overvoltage protection
td
ö
-
VPickup
÷
ø
VPickup
td ⋅ 480
+ 0.035
2.0

V − VPickup
⋅ − 0.5 

VPickup
td ⋅ 480
+ 0.035
3.0

V − VPickup
⋅ − 0.5 

VPickup
×
td A
+
D
P
ö
-
V VPickup
× - ÷
C
ø
VPickup
Range or value
td = (0.05-999.00) 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
Range or value
td = (0.05-1.10) in steps of 0.01
td = (0.05-1.10) in steps of 0.01
td = (0.05-1.10) in steps of 0.01
td = (0.05-1.10) in steps of 0.01
A = (0.005-200.000) in steps of 0.001
B = (0.50-100.00) in steps of 0.01
C = (0.0-1.0) in steps of 0.1
D = (0.000-60.000) in steps of 0.001
P = (0.000-3.000) in steps of 0.001
Section 26
Inverse time characteristics
Accuracy
IEC 60255-151, ±5.0%
or ±40 ms whichever
is greater
SEMOD116978-2 v9
Accuracy
±5.0% or ±45 ms
whichever is greater
1393