ABB REB650 Technical Manual page 474

Section 19
Time inverse characteristics
468
Table 408: 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
-
VPickup V
ç × -
32 0.5
è
VPickup
EQUATION1659 V1 EN
V = V
measured
Table 409: 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
-
V VPickup
ç × -
32 0.5
è
VPickup
EQUATION1662 V1 EN
Type C curve:
×
td 480
=
t
æ
-
V VPickup
× -
ç
32 0.5
è
VPickup
EQUATION1663 V1 EN
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
ö
÷
ø
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
ö
÷ -
0.035
ø
td = (0.05-1.10) in steps
of 0.01
3.0
ö
-
÷
0.035
ø
1MRK 505 277-UUS C
Accuracy
±5% +60 ms
Accuracy
±5% +70 ms
Technical Manual