Allis-Chalmers LA-1600, Instruction Book

Page: 45 / 100

,
.� ...
. ,
A
AWS - CHALM ERS
"10.
LATC H I NG ARt.•S
151 1. RESET RE LAY
1512.
RELAY CONTACTS
1 5 1 3. TERIIIINAL LUGS
1514. BELL ALARM RE LAY
1515.
SPAC ER NUTS (USED
ON
Llrt6000NLY)
1516. BRACKET
1517. SH I E LD
1518. HEX. H E A D SCREW
FIG. I5A
TYPICAL BE LL ALARM1
(ELECTRICAL RESET)
DEC. 12, 1 966 71-2408620 ·401
The be l l a l an. atta�nt func t i ons to c l os e or
open an a l a �
c
i
r c
u i
t
upon
a
u t
omat
i c overcurrent t
r
i
pp
i ng of the b reaker. I t c
o
n s
i
s
ts
of two
r
e
l a ys wi th i nter l ocki ng a nma t u res .
The
b e l l
a l anm re lay ( 1 5 1 4)
co i I I s
. wi red to tenni na l s 7 a
n d 8 of t h e
s ta t i c t r i p dev i ce .·
As th i s Is a
l a tch i ng type re l ay f t he a l a rm re l ay
c
on t a
c
t
s
( 1 5 1 2)
a r e res e t e l ec t r i ca l l y
to the
o
p en p o!S
i t l o n s hown
by act ua t i ng reset r
e
l a y ,
( 1 5 1 1 ) . If t
h
e
dev i ce
I s .not s tab l e du r i ng b reaker
ope ra t i on or l f
ei ther
a r
ma
tu
r
e
f a f I s
to p i c k
up
when actua ted . l oosen hex head
s c rew
( 1 5 1 8)
to
re p
o
s i t i
o
n the t e rm l na l
boa rd . Th i s chan�1es the engagement be tween
the
I nter l ock i ng l
a
t c h i ng
a rma t u res
and the re l at i onsh i p be tween
the s t a t i ona ry
end movab l e con tac tl .