GEK-49848A
The 0. 2 ampe re ta p i s fo r use wi th tri p c o i l s whi ch o perate on c urrents ran gi ng
fro m 0. 2 up to 2. 0 a mperes, a t the mi ni mum control vol tage.
I f thi s ta p i s us ed
wi th tri p coi l s requi ri ng more than two amperes, there i s a pos s i bi l i ty that the
res i stance of seven ohms wi l l red uce the current to so l ow a val ue that the breaker
wi l l not be tri p ped.
The two a mpere tap s houl d be u s ed wi th tri p co i l s tha t take two amperes o r more
at mi ni mum control vol ta ge, pro vi ded the c urrent do es not e xceed 3 0 amperes at the
maxi mum con trol vol tage.
I f the tri ppi ng cu rrent exceeds 30 a mpere s, the
connecti ons s ho ul d be arranged so that the i nducti on u n i t conta cts wi l l o perate an
a ux i l i ary rel ay whi ch i n turn energi zes the tri p co i l o r co i l s.
On s uch an
a p pl i cati on, it may be neces s a ry to connect a l oa d i ng res i s to r in pa ral l el wi th the
a u xi l i ary rel ay co i l to al l ow eno ugh cu rrent to o perate the target s ea l - i n u n i t.
D C RES IS TANCE + 1 0%
TABLE 7
S EAL- I N UNI T RAT INGS
M I N. OP ERAT ING
+ 0 -25%
CARR Y CONT. ( AMP ERES )
CARR Y 30 AMPS FOR
CARR Y 10 AMPS FOR
60 HZ I MP EDANCE ( OHMS )
TELEPHONE RELAY AUX I L I ARY UNIT
TAP
0. 2
2. 0
7. 0
0. 1 3
0.2
2. 0
0. 3
3. 0
0. 03
4. 0
0. 2 5
30. 0
52. 0
0. 53
The D C o perated a u x i l i ary u n i ts on model s JB C5 1 P, JB C53 P and JB C7 7 P a re rated
1 2 5 o r 48 vol t s DC.
CONTACTS
The cu rrent- cl os i ng rati ng o f the i nducti on u n i t con tacts i s 30 a mpere s for
vol tages not e xceed i ng 25 0 vol ts. Th ei r c urre n t-carryi ng rati n g i s l i mi ted by the
t a p rat i ng o f the s ea l - i n un i t.
OP ERAT ING CHARACTERISTI CS
P I C KUP
At the maxi mum torque a n gl e, the d i recti ona l un i t wi l l pi ck u p at one percent
of rated vol tage wi th two ampe res c urrent.
P i cku p o f the TOC u n i ts i s d e fi ned a s the cu rrent requ i red to cl ose the
conta cts from the 0. 5 ti me di al pos i ti on. The pi ckup val ue i s wi t h i n fi ve pe rcent
o f ta p v a
1
ue
•
The pi cku p o f the d i recti onal l y control l ed I OC un i t can be adjusted o ver an
ei ght- to-one ran ge as i n di cated i n Tabl e 5.
8
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