Allis-Chalmers BWX-6637-5, Инструкция

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-·'
T e s t
-
P r oceed a s
fo l l ows :
C on n ec t
t e s t
c
i r
c u
i t
as
s h
ow
n
i n F i g u r e 7 F
Loos e n s ha f t J oc k s
S e t p i c k - u p k n o b s
a t
1 1A1 1
S e t i ns ta n t a neous
(
o r
t r a n s f e r
)
knob a t
l OX or
h i
ghe
r
C l os e B reaker
Qu i c k l y i n c r ea s e c u r r e n t
t o 1 . 5
Amps
( 3 X
p i c k-up)
a n d ho l d
fJ re� kc r
s ho u l d
t r i p i n
a p p rox i ma t e l y
1 0
t o
45 s econd s
d e p � n d i n g on t h e
t i me
b
a
n d
( s ee
c u r r e n t - t i m e c u r v e ,
F i gu r e s 7 0 , 7 F. )
Red uce o r
s h u t
o f f c u r r e n t .
Repea t
a s
d e s i r e d
S e t
i n s t a n t a n eous (
or
t ra n s f e r ) knob at 5X
C l os e
B r ea ke r
Q u
i
c k l
y
i n c r eas e c u r ren t
t o 2 . 5 Amps
B r e a ke r s h ou l d
t r i p i ns t a n t l y
a t 2 . 5
Am
p
s
or
a
l i t t l e l es s
Red uce
o r
s h u t
o f f cu r rent
Repe a t a s
de s i 1 ed
Res t o r e o r i g i na l s e
t
t
i
ng
s
a n d t
i
g h
t en
s ha f t l ocks
T h i s
f
u
n
c
t
i
o
n
t e s t
w i l l
s h ow t ha t t h e
t i me
d e
l
a
y
c i rcu i t
and
t
h
e
s h o r t
t i me
c
i r
c
u i t
a re f u nc t i on i ng . Repea t a b i l i t y s hou l d
b e
good ,
b u t t h e
s pec i f i c v a l ue
of
t i me d e l ay s h ou l d
n o t
be
j ud ge d exc e p t
i n
t he b road
s e ns e .
Obv i ous l y , o t he r
pa r ame t e r s
can
be
u s ed
f o r th i s
t e
s
t
-
t h o s e
d e s c r i bed w i l
l
g i ve
a
r
e
e
s
o n a
b l
y
fa s t
t es t
w i t h
m i n i mum
tes t
powe r .
H
i g h
e
r
c u r r en t s
a t t
h e 1 1A"
s
e
t
t
i
n
g w i
I I
g
i
v
e
f
a
s t e
r
t
r
i
p
t
i
m
e s
.
S e t t i n
g
s othe r t han "N '
r
e
q
u i
r
e more c u r
r
e
n t
t o ge t t h e des i r ed
m
u l t i p l e
s
o f p i c k - u p
(
e . g .
3
Am
p s
a t
' 'E"
s e t t i n g i s r
e
q
u
i
red f o r 3X
p i ck-up } .
The
f u n c t i on t e s t ma y
b e repea t ed
u
s
i n g t erminals 2 -4
a n d 3 -4
( Mod e l
A
I
a n d
D )
;
o r t e rm i na
I
3 -2 (
Mo
d e
1
AG a
n
d
D G ) .
I t
i s n o t r
e c omm
e
n
d
e
d
t o
t e s t t e rm i na l s 4 - 2 on
t h e
M
o d
e
l
s AG ,
D G
s
i
n ce
t h e g r
o
u
n
d
d e t ec t i on
t r ans f o rme r
c i r c u i t
h a s
a v e r y mu c
h h i gh e r i mpedance a n d i s b e y on d
t h e
c
a pa
b
i
l
i t
i
e s of
t he
u s u a l
l ow powe r
t e s t
fac i l i t i es .
I f
t h e
b r e a ke r
f a i l s
t o
t r i p
o
r t r i ps i ns t a n t l y a t
1 . 5
ampe r e s , i t
i s
s u g g e s t ed t h a t
t h e
f
a
c
t
o
r
y
be
con t a c t e d .
O n
l
y
pe r s onn e l
who
a r e
t h o rough l y
f am i
1
i a r
w i th
c
i
r
c
u
i
t
s
of
t h i s t y
p
e
s ho u l d a t t em p t
t o
l oca t e
a n d co r re c t t
r
o
u
b
l
e
s
.
The
a
b o
v
e t e s t i s
be l i eved to
be
a
d
e
q
u
a
t
e
fo r t he maj o r i ty o f a pp l i ca ­
t i ons of
l ow vo l t a ge c i r cu i t
b
r
e
a
k e
r s
.
Howeve r ,
t
h
o s e who
r e qu i r e
c l os e coord i na t i on
w i t h o th e r dev i ces
a n d
w i s h
t o
ch e
c k c a l i b r a t i on
pe r i od i ca l l y ,
may do
s o i n t h e
f
i e
l
d w i t h a
reasona b l e deg ree
of
accu
r
a
cy
b y us i n g s omewha t more
e l abora t e equ i pmen t a n d t e s t p roce d u res .
F u r t he r
t
e
s t
i n f o rma t i on
i s
a va i l a b l e
i n
s ta t !�
t r i p ov e r c u r r e n t t r i p
d e v i ce I n s t r u c t i on B oo k BWX -6678 - 1 .
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