Rev.04
62/112
7.2 IEEE Curves
The SILA relay complies with the curves shown in standard IEEE:
•
Inverse Curve
•
Very Inverse Curve
•
Extremely Inverse Curve
There is a general mathematical equation that defines the time in seconds as a function of the current:
( )
+
−
=
B
V
A
TD
t
P
1
Where:
adjusted
I
I
V
=
Parameters
A
P
B
Ext. Inverse
28.2
2.00
0.1217
Very Inverse
19.61
2.00
0.491
Inverse
0.0515
0.02
0.114
The curve can move from its axis using the TD time selection device, which the user can adjust.
I
adjusted
is the initial operating current, set by the user.
Summary of Contents for SIL-A A Series
Page 8: ...www fanox com Rev 04 8 112 2 1 2 Case dimensions The dimensions are in mm...
Page 9: ...www fanox com Rev 04 9 112 2 1 3 Connection diagrams 2 1 3 1 Analog connections...
Page 12: ...www fanox com Rev 04 12 112 2 2 SILA with short circuitable current terminals 2 2 1 Front view...
Page 13: ...www fanox com Rev 04 13 112 2 2 2 Case dimensions The dimensions are in mm...
Page 14: ...www fanox com Rev 04 14 112 2 2 3 Connection diagrams 2 2 3 1 Analogic connections...
Page 22: ...www fanox com Rev 04 22 112 3 3 Functional diagram...
Page 61: ...www fanox com Rev 04 61 112...
Page 63: ...www fanox com Rev 04 63 112...
Page 64: ...www fanox com Rev 04 64 112...
Page 65: ...www fanox com Rev 04 65 112...
Page 111: ...www fanox com Rev 04 111 112 11 APPENDIX NOTES...
