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General
s e l f - c ontained unit ,
own pe rmane nt pane l a t the fa c tory .
v e r t i c a l po s i tion ,
w i th the breake r main pane l held v e r t i c a l ly .
Unpacking
are broken or damaged ,
c he ck for any
b l own out o f the c omple te a s sembly,
age o v e r l oad a t ta chme n t s and such o the r a t t a c hme n t s a s are suppl ied .
lubrication sup p l ied during fac t ory a s sembl y ,
f orm of gre a s e whi c h i s u s e d sparingly .
years o f s e rv ic e . A dd i t i o na l o i l wi l l only promote the a c cumulation o f dust
and d i r t .
from pla s te r ,
fri c ti o n to the mov ing part s in the t oggle l i nkage .
Inspection
i t s pe rmanent mounting ,
in a ve rtical p o s i t i on while the i n s pe c t i on i s made .
t i on t o move the c ontac t s
of each arc
to
make sure
C on t inue the c l o s ing
t i onary arc t ip s .
inc h,
as
c lo sed po s ition and watch the main c ontac t o v er travel as e v idenced by r o tary
mo tion away from
a ttached .
r otate c ounte r c l o ckwi se t o
c o llaps e and the mov i ng c onta c t a s sembly mov e f re e ly to the ful l open p o s i
t i o n .
the t o ggle me chani sm .
..
gravity .
f ri c t i on or b inding .
Adjustment of Contacts
There i s n o
c ir cums tance s the s e main c onta c t s w i l l la s t the
r e pair o ther than o c ca s iona l c leaning .
high s ilver a l l oy .
Replacement of Contacts
removed as a uni t b y taking out t w o b o l t s at the outer ends o f the sub - pane l .
Thi s give s a c c e s s t o the c on t a ct s for easy insp e c t i on or replacemen t .
Type DK- 1 5 and DK-25 Air Circuit Breaker
The DK air c ircuit breake r ,
and has been moun te d ,
and a l l
C are mu s t be exe r c i sed when unpa cking
and a n
damage i n
I t i s n o t adv i s ab le
In new in s ta l la tions ,
c oncre t e and
F inal i n s pe c ti o n
but if thi s i s imp o s s i b l e ,
R o ta t e the manual
tip through the throat o f the 11De - i on11 arc inte rrupting chamber
tha t the tips
mo t i on unt i l the moving arc
Che ck the main c ontac t s e para t i on a t
2
shown on F ig s .
i t s s to p ,
R e turn the manually
This i s f o l l owed
immediately by c ompl e te
This re se t t ing ope rat i on i s a c c ompli shed ent ire ly by
For thi s rea s on the
The arc t i p ad j u s tment
ad j u s tment provided for the main
The sub - panel ,
c omple te with all a t t a chment s ,
I t i s de s igned only t o b e mounted i n a
i n s pe c t i o n s for proper
inspe c t io n
should b e
A l l du s t and d ir t
trans i t .
e spe c ia l l y in the c l o s ing t oggle
to
lubrica te a ny par t s o f the breaker .
Thi s wil l be found suffi c ie n t f o r
the breake r mus t be
o the r fore ign
g r i t t y
should pre ferably
o perating hand le
t oward the c l o sed p o s i t ion .
d o n o t
rub agains t
and
C ont inue the hand le r o t a t i on to the fully
3 .
ad j a c e nt
to the
ope rated hand l e
trip the
breake r .
l inks mus t always be free to
should be mad e a s
B o th ma in a nd arc ing c o ntac t s are a
barrier and " De - i on "
1
ad jus ted and c a librated on i t s
operat i o n mus t be made
to make
sure
tha t no par t s
made
immed iate ly t o
should be careful ly
where nec e s sary ,
is a spe c ial
careful ly pro te c t ed
parti c l e s
that may add
be made w i th the
i t can be s e t up r ig id ly
s l owly in a c l o c kwi se d i re c
C he ck the movement
the c eramic
s ide plate s .
tips
j us t t ouch the s ta
approxima t e ly
s e c t i on
where the
to the
neutral po s i t i on and
The toggle
linkage should
re s e tt ing o f th e links in
move
shown in F i g s .
c ontac t s ,
and unde r ordinary
l i f e of the breaker without
int e:rrupting a s s embly may b e
i s a
l ink
The
breaker in
1/8
shunt
i s
w ithout
2
and
3 .
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