Siemens 15-FSV-750 Installation Operation & Maintenance - Page 33

Browse online or download pdf Installation Operation & Maintenance for Switch Siemens 15-FSV-750. Siemens 15-FSV-750 48 pages. Vacuum circuit breakers fsv series and msv series

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Interrupter/Operator

Maintenance

•

Fig. 21b Primary Contact Closed - Free Position

Hazardous voltages and h i g h speed me

chanical parts can cause deat h , personal

injury and property damage.

Before starti n g any work, breaker should be

i s o l at e d , s h o r t c i rc u i t e d a n d g ro u n d e d .

Control power shou l d b e d i sconnected and

breaker c losed and opened by hand until

both s p r i n g s have been d i s c harge d .

1 . 2

Loosen the lateral bolt(s) on terminal clamp. 29 . 2 .

Refer t o f ig u re 23 a n d em ploy t h e i l l ustrated p roce

d u re to loosen clamp hardware. (8mm hex allen and

1 7mm socket)

1 . 3

Withdraw p i n , 4 8 . 5 , from i n su lati n g coupl er, 4 8 , and

leve rs , 4 8 . 6 .

1 . 4

Remove cou p l i n g p i n from the eye bolt, 3 6 . 3 .

1 . 5

Free struts, 28, from the u p per pole support, 20. Loosen

the strut hardware on the lower support, 40, and swing

the struts forward and downward . ( 1 7mm open end

and 1 7m m socket)

N OT E : Some breakers may emp loy fou r struts. The

ad d itional struts should also be freed from the u pper

pole s u p port, loosened at the lower pole support and

swu n g the struts rearward and downward.

1 . 6

Loosen screws faste n i n g the centering r i n g , 28 . 1 .

( 1 0mm open end)

WARNING

•

Fig. 21c Primary Contact Forced Open by Manual

Pressure

1 . 7

Remove bolt " B ' : lockwasher and large washer at

stationary contact of the vac u u m i nterru pter. (24mm

socket) Carefu l ly note location of conductive spacers

between i n terru pter and pole s u p port, if i n c l u d e d .

1 . 8

Using a deep 24 mm socket loosen and remove hex

capscrew fasten i n g the upper pole s u p port to the

post i n s u lator. Co mp letely remove the upper pole

support and set aside.

1 . 9

G rasp the vac u u m interrupter and withd raw vertical ly.

Assistance may be required to work the terminal clamp

off the mova ble stem of the tube. F O R C I B L E TWIST

I N G EFFORT IS NOT ALLOW E D . If the terminal clamp

cannot be easily removed , STO P ' , check to be cer

tain hardware i s loose and the c l amp i s not bou n d .

I n stal l i ng an I nterrupter

NOTE

Replacement i nterru pte r, 30, w i l l be received from t h e fac

tory with an eye bolt, 36.3, i n p l ace, adjusted and torqued

to specific req u i rements.

SETTING

2 . 1

I n s pect a l l s i lver plated connection surfaces for

c l ean l i ness. C lean only with a c l oth and solve nt. Do

not a b rai d .

2 . 2

I n sert i nterru pter, 30, i n t h e lower pole support, 4 0 ,

w i t h the evacuation n i p p l e ,

hou s i n g . Slip terminal clamp, 29 2 , i nto position on

the movable ste m .

Page 28

NO T AL TER THE ADAPTER

f c i n g t h e mechanism