ABB Relion 670 series - Page 1399

Table 1083:IEC Inverse time characteristics for Voltage restrained time overcurrent protection
Function Range or value Accuracy
Operating characteristic:
( )
= ×
-
æ ö
ç ÷
ç ÷
è ø
1
P
A
t td
I
EQUATION1653 V1 EN-US
I = I
measured
/I
set
td = (0.05-999.00) in steps of 0.01 IEC 60255-151, ±5.0%
or ±40 ms whichever
is greater
IEC Normal Inverse A=0.14, P=0.02
IEC Very inverse A=13.5, P=1.0
IEC Inverse A=0.14, P=0.02
IEC Extremely inverse A=80.0, P=2.0
IEC Short time inverse A=0.05, P=0.04
IEC Long time inverse A=120, P=1.0
SEMOD116978-2 v9
Table
1084:
Inverse time characteristics for overvoltage protection
Function Range or value Accuracy
Type A curve:
=
-
æ ö
ç ÷
è ø
t
td
V VPickup
VPickup
EQUATION1661 V1 EN-US
V = V
measured
td = (0.05-1.10) in steps of 0.01 ±5.0% or ±45 ms
whichever is greater
Type B curve:
32 0.5
=
⋅
−
⋅ −
 
 
 
2.0
480
+ 0.035
t
td
V VPickup
VPickup
EQUATION1662 V2 EN-US
td = (0.05-1.10) in steps of 0.01
Type C curve:
=
⋅
−
 
 
 
3.0
480
32 0.5
+ 0.035
t
td
V VPickup
VPickup
⋅ −
EQUATION1663 V2 EN-US
td = (0.05-1.10) in steps of 0.01
Programmable curve:
×
= +
-
× -
æ ö
ç ÷
è ø
P
td A
t D
V VPickup
B C
VPickup
EQUATION1664 V1 EN-US
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
1MRK 502 066-UUS B Section 26
Inverse time characteristics
1393
Technical manual