Table 57. Inverse time characteristics for residual 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
Class 5 +40 ms
Type B curve:
=
×
-
×
-
-
æ
ö
ç
÷
è
ø
2.0
480
32
0.5
0.035
t
td
V
VPickup
VPickup
EQUATION1662 V1 EN-US
td = (0.05-1.10) in steps
of 0.01
Type C curve:
=
×
-
×
-
-
æ
ö
ç
÷
è
ø
3.0
480
32
0.5
0.035
t
td
V
VPickup
VPickup
EQUATION1663 V1 EN-US
td = (0.05-1.10) in steps
of 0.01
Busbar protection REB650
1MRK 505 265-BUS B
Version 1.1 ANSI
42
ABB Power Grids
© Copyright 2011 ABB Power Grids. All rights reserved
Содержание RELION 650 SERIES
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