Opening And Closing Time; Interrupter Replacement. 1 - Siemens FCV-500 Instructions Manual

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placed to prevent damage to the vacuum interrupter bellows. Check to determine that shock absorber
·
( 18j) is not bottoming in either the open or closed positions by following "S" dimension ( Fig. 46) below:
Breaker closed
Breaker open
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Add or su s tract a shim as necessary to meet specified "S" dimension.
CAUT ION
BEFORE ATTEMPT ING F IRST CLOS ING OPERATION O F BREAKER MAKE SURE THAT THE "S"
D IMENS ION IS W ITH IN ITS M IN IMUM AND MAXIMUM VALUES AT OPEN POS IT ION OF BREAKER.
Open ing an d C l o sing Time:
C l o si ng t ime range . 042
Opening time r ange . 018 to . 025 seconds
Mounting and ad ju st ing h ar dw are sho ul d be chec k ed for tightness. E l a stic stop nut s i n di ca t ed
b y a rrows i n F ig .
I nterrupter Repl acement
Repl acement interrupters are furni shed on l y as comp l ete assembl ie s as shown in Fig .
el im ina te s the n e ed for spec ial f ield assembl y fixture s and avo ids the r isks of i nadvertent damag e
to the vacuum interrupter bel low s b y fie l d a ssemb l y.
It i s recommend ed th at one i nterrupter a ssembl y be remove d and repl aced co mp l etel y rather than
removing two or more i nterrupter s at a ti me . T his proc edure w ill h e l p ret ain the factory set
al ign men t- at the pr im ary di sconnect bush ing s. Fo l lowing is a step -b y - step p roce dure for e x­
changing an interrupter assembl y . Refer to Fi g . 4a.
Remove hinged panel assembl y (60) from the c irc uit bre aker , after di scharg ing spri ng s
1.
and tr ipp ing b reaker .
2.
Re move h ardware from the upper en d of insul ator b ar (21) and p ul l in sul ator bar awa y
fro m interrupter .
3.
Loosen c l am ping bol t thro ugh cop per b ush ing at the fi xed end of the vacuum i n ter ­
rupte r.
Loosen lock ing n uts
4.
5.
Remo ve p in
6.
Remove .50 X 4.00
bar (14).
7 .
At th is t ime the inter rupter assemb ly may be mo ved downw ard to rel ea se the fixed
terminal from the b reaker b ush ing . I t may be necess ar y to use a wedge in the c l amp ­
ing s lit at the bre aker b us hing
8.
Re mo ve the pivo t (12) the
.... ..
t
__ .
o the nf!N{
S M IN. S MAX.
0.955 1.25
.100 .295
to
.062 seco n ds
(3)
should not b e t urned, a s ind icate d b y the 11 Note
(49)
an d
( 4 7)
at r adius arm an d turn ad jus ting sc rew for maximum engagement .
x
(
12. 7 1 01.6mm) Lg. Bolt as shown in view AA. Remove contact ( 15) and
ad
j
in te rr up ter asse mb ly.
on
(50)
adj ust ing scr ew
rei
ease t he in te rrupter .
to
( 1 3)
usting
screw w ith n uts (49) and (50) and re assemb l e
- 14 -
11•
(3).
(13).
Thi s