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The me chan i sm crank
l e ver .
The r e la t i ve mo t i on of the
surfa c e
i s
to produ c e the
l oa d
i s g r e at e s t .
p o s i t i v ely carr i e s
s o tha t
the br eaker
i n t er f erenc e or me chan i cal di s engagemen t .
limi t swi t ch mu s t be a l l owed to cu t
One a d j u s tment b e tw e en the mo t o r me chan i sm and
lever s h o u l d b e c h e c k e d
and r o ta t e the
m o t or b y hand .
l o�er end and r o ta t i ng the
the crank r o l l er i s
1/64
1/32
from
t o
inch
surfac e at
thi s p o in t .
b e undu l y high ,
and i f t o o
fa il t o move the breaker t oggle l i nkage t o
Thi s a d j ustmen t i s ma in tained by adding or taking
molded t i ebar and the c a s t r o l l er l e ver on the righ t s i d e .
The mo t o r c l o s ing current
s tandar d c o n t r o l v o l ta ge ra t ings :
V o l tage Ra t i ng
110
V o l t ,
2 2 0
Vo l t ,
125
V o l t ,
250
Vo l t ,
Shunt
Trip
Attachment
The
s h unt trip
t he breake r frame behind the fa ce p la te .
t o i t s l ow e r end .
by a l ong trip rod he ld by a ca se
shunt trip ca se .
B o th type s are inte rchangeable and can be readily removed
and re placed .
In re p la c ing the
c o re and
trip rod a s s embly is
hole-s
or c o i l .
The shunt t r i p i s de s i gn ed for
curr en t mus t always
n orma l
tripp ing curr en t s f or s tandard c on tr o l v o l tag e s ar e :
Vol tage R a t i n g
110
V o l t , A- c .
220
Vo l t , A- c .
125
V o l t ,
250
Vo l t ,
Wiring Diagram
The s tandard w i ring diagram
trip
a t tachmen t s are
supp l i e d w i th a s p e c i a l r elay a s a n i n tegral
a t e d br eaker
that preven t s r e c l o s ure
swi t c h has b e en open e d .
i f c l o s e d aga i n s t a high ov erl oad or shor t c i r cui t .
the c on t r o l wiring i s
c l o s ed a f t er the m o v i ng c on t a c t a s s emb ly has
Type
DK- 1 5 and DK-25 Air Circuit
engag e s a
crank r o l l er wi th
max imum m e chani cal
A l imi t swi t ch
s egment on the
the crank r o l l er p a s t the cam af t er a c l o s ing op er a t i on ,
can b e c l o s ed e i ther
off
for p r o p e r operati on .
T hi s ·i s done by
arma ture i n the
j u s t pas s ing ov er the heel o f the
c l earan c e b e tw e en the
If b inding o c curs, the minimum c l o s ing v o l tage w i l l
much c l e aran c e i s
is g iv e n
A- c .
A- c .
D- e .
D- e .
a t tachme n t , w he n supp lie d ,
'When the
shunt trip i s no t
iden t i ca l in ou t s ide appearance w i th the
s hunt trip a s s embly,
fre e t o move w i thou t b inding a ga ins t the guide
be
cut
off by an auxi l i ary swi t ch
D- e .
D- e .
10 .
gi ven i n F i g .
8 .
S ee F i g .
Thi s pr e v e n t s t h e br eaker from pump ing
the preven t i on o f e l e c tr i c a l ly
4
Breaker
hardened s t e e l
cam
r e s p e c t
advan tage when
m e chan i sm crank
manual ly o r e l e c tri cally wi thou t
The
only r e qu i r ement i s
the motor c l o s i ng curr en t .
the br eaker r o l l e r
C l o s e the br eaker manua lly
removing the pla t e a t the
di r e c t i on of the ar r ow ,
cam .
ro l l er
surfa c e and th e
pr e s en t ,
the
c omp l e t ely
out a
spa c er b e tw e en the
in
the fo l l ow i ng tab l e f o r
C l o s i ng Curr e n t
a t Normal V o l tage
30
Amp e r e s
15
Amp er e s
30
Amp e r e s
15
Amp e r e s
i s mounte d rigidly t o
The t r i p b a r bra cke t
supp l ie d ,
i t s p la c e
make
i n t ermi t t en t duty .
on the breaker .
Tripping Curr en t
7
Amp e r e s
4
Amp er e s
2 . 5
Amp e r e s
1 . 5
Amp e r e s
f o r t h e m o t or
me chan i sm and
The mo t or c on tr o l circui t
pa r t o f t h e e l e c t r i c a l l y oper
un t i l
a f t e r the
ex t ernal
A
further feature
i n c hing
s t arted t o c l o s e .
on the r o l ler
t o thi s
cam
the c l o s i ng
shaft
that the
un t i l
There should b e
cam
t h e me chan i sm may
cl o s ed p o s i t i on .
i s a t ta ched
is taken
sure the moving
The tri pping
The
shunt
can b e
c o n t r o l
of
the
breaker
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