ABB Relion 650 Series Technical Manual page 615

1MRK 506 326-UUS B
Table 577: Inverse time characteristics for undervoltage protection
Function
Type A curve:
=
t
æ
VPickup V
ç
è
EQUATION1658 V1 EN-US
V = V
measured
Type B curve:
=
t
æ
ç
32
è
EQUATION1659 V1 EN-US
V = V
measured
Table 578: Inverse time characteristics for residual 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
Line distance protection REL650
Technical manual
td
ö
-
÷
ø
VPickup
×
td 480
+
0.055
2.0
ö
-
VPickup V
× -
÷
0.5
ø
VPickup
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
© Copyright 2011 ABB Power Grids. All rights reserved
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
Range or value Accuracy
td = (0.05-1.10) in steps Class 5 +40 ms
of 0.01
td = (0.05-1.10) in steps
of 0.01
td = (0.05-1.10) in steps
of 0.01
Section 21
Time inverse characteristics
Accuracy
Class 5 +40 ms
609