ABB REL650 Product Manual page 74

Line distance protection REL650 ANSI
Product version: 1.3
Table 93. Inverse time characteristics for undervoltage protection
Function
Type A curve:
td
=
t
æ ö
-
VPickup V
ç ÷
è ø
VPickup
EQUATION1658 V1 EN
V = V
measured
Type B curve:
×
td 480
=
t
æ ö
-
VPickup V
ç × - ÷
32 0.5
è ø
VPickup
EQUATION1659 V1 EN
V = V
measured
Table 94. Inverse time characteristics for residual overvoltage protection
Function
Type A curve:
td
=
t
æ ö
-
V VPickup
ç ÷
è ø
VPickup
EQUATION1661 V1 EN
V = V
measured
Type B curve:
×
td 480
=
t
æ ö
-
V VPickup
ç × - ÷
32 0.5
è ø
VPickup
EQUATION1662 V1 EN
Type C curve:
×
td 480
=
t
æ ö
-
V VPickup
ç × - ÷
32 0.5
è ø
VPickup
EQUATION1663 V1 EN
74
Range or value
td = (0.05-1.10) in steps of 0.01
td = (0.05-1.10) in steps of 0.01
+
0.055
2.0
Range or value
td = (0.05-1.10) in steps of
0.01
td = (0.05-1.10) in steps of
0.01
2.0
-
0.035
td = (0.05-1.10) in steps of
0.01
3.0
-
0.035
Accuracy
±5% +70 ms
1MRK 506 337-BUS B
Accuracy
±5% +60 ms
ABB