Siemens 15-FSV-750 Kurulum Operasyon ve Bakım - Sayfa 37

Anahtar Siemens 15-FSV-750 için çevrimiçi göz atın veya pdf Kurulum Operasyon ve Bakım indirin. Siemens 15-FSV-750 48 sayfaları. Vacuum circuit breakers fsv series and msv series

Siemens 15-FSV-750 Kurulum Operasyon ve Bakım
Vehicle
Description
Vehicle Function and Operational
Interlocks
Type MSV and FSV vacu u m circuit breakers are comp rised
mainly of the interru pter/operator su b-assembly fitted to a ve­
hicle. This interru pter/operator su b-assembly is an integ ral ar­
rangement of operating mechanism, d ielectric system . vacuum
interrupters, and means of connecting the p ri mary c i rcuit. The
vehicle supports the interru pter/operator su b-assembly, pro­
viding mobility and fully coordinated appl ication in Siemens
" 0 "
type
and "F" switchgear.
Successful coordinated application of the fully assembled MSV
or FSV vacuum breaker is achieved thru precise fixtured align­
ment, and important functional interlocking .

Alignment

E lements of the vehicle structu re, which are assemb l ed under
fixture control and then are secu red and p inned i n place. in­
clude the following (no adju stments are requ i red):
Side c hannels which p rovide su pport to the interru pter/op­
erator sub-assembly are fixtu red square (90) to the wheel
axle holes in the vehicles base.
The primary c i rcuit conductors are fixtu red to appropriate el­
evation, phase spacing and al ignment to the inside surface
of the guide bar. The g u i d e bar, i s set i n the fixture firmly
secu red and ten pinned i n place.
Secondary d isconnects are fixtu red and pinned in place
Shutter cam which raises and lowers protective pri mary
bushing barriers, is fixtu red firmly secu red and pinned.
· Breaker g rounding contacts, are al igned and securely bolted
in place.
Closing spring d ischarge roller, i s located and sec u red .
The hi nged protective barrier is aligned , adju sted vertically
and then pinned in place.
Thus, all those features which must align with elements of the
switchgear "d raw out" enclos u re , are precisely set, firmly se­
cured and pi nned whi l e the complete b reaker is located i n a
rigid fixture.
Interlocks
A
I noperative or by-passed interlocks will cause
death. serious personal inJury and property
damage
M e c h a n i c a l and e l e c t r i c a l i n t e r l o c ks are
provided as integral com ponents of this
equi pment to ensure safe use. Interlocks must
be i n operation at all times. Read this in­
s t r u c t i o n m a n u a l . Know a n d u n d erstand
correct i nterlock fu nctio n . Check i nterlock
f u n c t i o n p r i o r to i n s e rt i n g b re a k e r i n to
switchgear cub1cle.
Breaker Racking Interlock
(Lever Type)
Reference: Figu res 24a & 24b
The racking interlock functions to block movement of the cir­
cuit breaker from the connected or test positions whenever the
breaker is closed , and to maintain the breakers mechanism in
a "trip free" state whenever the c i rcuit breaker is " released"
The breaker i s
closed
whenever the primary c i rc u it is com­
pleted through the vac u u m interrupter contacts. This closed
condition i s caused by rotation of the breaker shaft, 63 to the
position shown in figure 24b.
The breaker is released (free to rack) when the plunger shown
in figure 24a is elevated sufficiently to c lear the slot in the
c u bicle rai l .
Fu nction o f t h e c losed b reaker racking release is in itiated by
elevating the racking release handle. This action causes the
interlock bell crank, 1 , to attempt CCW rotation. If the breaker
were closed, the bell crank will rotate incrementally causing
the "push rod ", 2 , to rise thru the action of crank, 1 , and link. 3 .
This action w i l l b e i mmediately blocked, because the p u s h rods
"mushroom" head will encounter a cam s u rface of l ever 64 . 3
o n the b reaker shaft, 63, typically after 1 to 2 m m ( 040 to . 080
inches) of motion. With motion blocked after this short move­
ment, it is not possible to raise the p l u nger above the cubicle
rai l . Thus, The Breaker Can Not Be Released For Racking
When The Primary Contacts Are Closed.
If the breakers primary contacts were open , the cam s u rface
of lever 64 . 3 on the breaker shaft, 63 will have rotated beyond
the push rods " m u shroo m " head al lowing the push rod to nse
freely
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