GE IFC51A AND 518 User Manual

GEK-45375
Ratings less than one second may be ca'lculated accord'lng to the formula I = .JK/f', where T is the
time ·in seconds that the current flows.
The continuous ratings for the time overcurrent unit are shown ·in Tables 4 and 5.
TAB1f~.
0.5 - 4.0 Ampere Range Ratings
-
·------------Tan-
--
-IFC51
--
I FC53
-IFCT[_::-
-
0.5 0.6
1. 6
1.8
3.8 4.0
-2.5
2~7-
---- '----·-·-
Hl-S.EISMIC .INSTANTANEOUS UNIT
------,---
I
0.7 0.8 1 .0 1. 2 1. 5 2.0
'
2.0 2. 1 2.3
·>-2. 7
3.0 3.5 -
-
4.2 4.4 4.7 5.0 5.3
5:s·
j_JL_
3.2
3.6, -
4.0
4.5
r;--;-r-
TAB LU
1.0 - 12.0 Ampere Range Ratings
----··--
'
3.0
'
4.0
,4,5
5.0
6.'6
7. 1
6.5
7.5
The instantaneous coil is tapped for operation on either one of two ranges (Hor L). Selection of
the high or low range is determined by the position of the link located on the top of the support
structure. See F·igure 2 and Table 6.
Hi-Seismic Link _*___ Continuous r-;,;-On;;~-
lns tantaneous Pos 'iti on Range Rating : Second K
~-n-i t __ (_Am_ps_) _ __;____ _ ___ (A_m_p~) _( __ A_m_ps_J ___ __,\~~~~m=t~~· ~.~~>----------
! L 2-10 3.7· i 130
I. . -------•
2 - 50
16 ,900
1
H __ 10 - 50 7. 5
6 -
15;-f ___ L _ __6 _::__~- -~--l~O.~~-~~~+-j-2-60·-+-·--67-,-60-0-·-----j
_________ _J ___ H ____ 3_0_-_1_ s_o-'--~~ \
*The range is approximate, which means that the 2-JO, 10-50 may be 2-8, 8··50. There will always
be at least one ampere overlap between the maximum L setting and the m'lnimum H setting. Whenever
possible, always select the higher range, since it has the higher continuous rating.
**Higher currents may be applied for shorter lengths of time in accordance with the formula:
I • fKtf
6
Courtesy of NationalSwitchgear.com

GE IFC51A AND 518 Specifications

General

Brand	GE
Model	IFC51A AND 518
Category	Relays
Language	English