Table 703:
Inverse time characteristics for overvoltage protection
Function
Range or value
Accuracy
Type A curve:
=
-
æ
ö
ç
÷
è
ø
t
td
V
VPickup
VPickup
EQUATION1661 V1 EN
V = V
measured
td = (0.05-1.10) in steps of
0.01
±5.0% or ±45 ms
whichever is greater
Type B curve:
32
0.5
=
⋅
−
⋅
−
2.0
480
+
0.035
t
td
V VPickup
VPickup
EQUATION1662 V2 EN
td = (0.05-1.10) in steps of
0.01
Type C curve:
=
⋅
−
3.0
480
32
0.5
+
0.035
t
td
V VPickup
VPickup
⋅
−
EQUATION1663 V2 EN
td = (0.05-1.10) in steps of
0.01
Programmable curve:
×
=
+
-
×
-
æ
ö
ç
÷
è
ø
P
td A
t
D
V
VPickup
B
C
VPickup
EQUATION1664 V1 EN
td = (0.05-1.10) in steps of
0.01
A = (0.005-200.000) in
steps of 0.001
B = (0.50-100.00) in steps
of 0.01
C = (0.0-1.0) in steps of 0.1
D = (0.000-60.000) in
steps of 0.001
P = (0.000-3.000) in steps
of 0.001
Section 24
1MRK 511 365-UUS A
Inverse time characteristics
848
Phasor measurement unit RES670 2.1 ANSI
Technical manual
Содержание Relion 670 Series RES670
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