ABB Relion 650 Series Technical Manual page 614

Section 21
Time inverse characteristics
Table 575: RI and RD type inverse time characteristics
Function
RI type inverse characteristic
=
t
0.339
EQUATION1656 V1 EN-US
I = I
measured
RD type logarithmic inverse
characteristic
= 5.8
t
EQUATION1657 V1 EN-US
I = I
measured
Table 576: Inverse time characteristics for overvoltage protection
Function
Type A curve:
=
t
æ
V
ç
è
EQUATION1661 V1 EN-US
V = V
measured
Type B curve:
=
t
æ
ç
32
è
EQUATION1662 V1 EN-US
Type C curve:
=
t
æ
ç
32
è
EQUATION1663 V1 EN-US
608
1
×
td
0.236
-
I
/I
set
æ ö
I
- ×
ç ÷
1.35 In
è ø
td
/I
set
td
ö
-
VPickup
÷
ø
VPickup
×
td 480
2.0
ö
-
V VPickup
× - ÷ -
0.5 0.035
ø
VPickup
×
td 480
3.0
ö
-
V VPickup
× - ÷ -
0.5 0.035
ø
VPickup
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Range or value
td = (0.05-999) in steps of 0.01
td = (0.05-999) in steps of 0.01
Range or value
td = (0.05-1.10) in steps of 0.01 unless
otherwise stated
td = (0.05-1.10) in steps of 0.01 unless
otherwise stated
td = (0.05-1.10) in steps of 0.01 unless
otherwise stated
1MRK 506 326-UUS B
Accuracy
IEC 60255-151, class 5 +
40 ms
IEC 60255-151, class 5 +
40 ms
SEMOD116978-2 v4
Accuracy
Class 5 +40 ms
Line distance protection REL650
Technical manual