Siemens Type Vector Manual de instruções - Página 13

Procurar online ou descarregar pdf Manual de instruções para Interruptor Siemens Type Vector. Siemens Type Vector 18 páginas. Manual group-operated switch

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Operating handle adjustment procedure

The next series of steps address adjusting

the position of the handle assembly and

lock segment assembly so that the handle

can be inserted into the OPEN and CLOSED

slot correctly.

Important: It is extremely important to

adjust the handle position so it is

impossible to place the operating handle in

the CLOSED slot unless the air switch

blades are fully closed. An operator may

not be able to check the blades visually to

verify the air switch is fully closed at night

and/or under severe weather conditions.

Therefore, it should take considerable

wind-up (torsion) of the vertical pipe to

get the handle in position to force it into

the CLOSED slot. Remember that as the air

switch gets older, it will become harder to

operate and more force will be required on

the operating handle to completely close

the air switch. The operator must apply

sufficient force to completely close the

air switch.

1. Adjust the CLOSED and OPEN segments

on the lock segment assembly such

that they are approximately 90°/100°

apart, with adjustment still left in the

slots in each direction. Tighten the

bolts loosened under Installation

instructions item 10 on page 12.

Note: Before tightening bolts, put the end

of the ground strap from the handle

assembly under the flat washer on the

bolt. Leave enough slack in the ground

strap to allow the operating handle to

travel fully from the OPEN position to the

CLOSE position without any interference

(refer to Figure 7: Operating handle).

2. The handle casting should be mounted

4" (102 mm) to 6" (152 mm) above the

lock segment assembly. Position the

handle casting so that with the air

switch closed (blades tight against the

spacer), the operating handle will

strike point A on the lock segment

assembly when the operating handle is

lowered (refer to Figure 7: Operating

handle). This will assure that when the

air switch is fully closed, it will take

considerable wind-up torque to get the

operating handle into the CLOSED slot

on the lock segment assembly.

3. Tighten the four clamp bolts. Do not

tighten the piercing set screws yet.

Open and close the air switch slowly

and then rapidly. Check for a smooth

operation of the air switch. Adjust the

pipe guides for a smooth, non-binding

operation and tighten down both bolts

in each pipe guide assembly. Make sure

that the air switch can be fully opened

and fully closed (blade tightly up

against the jaw contact spacer on all

three phases).

4. Verify that the air switch handle will

strike point A of the lock segment

assembly and that considerable wind-

up torque is needed to get the air

switch operating handle into the

CLOSED slot of the lock segment

assembly.

5. If needed, reposition the handle

casting by loosening and re-tightening

the four clamp bolts until the operation

of the air switch meets the

requirements described in steps 3, 4

and 5. Adjustments may also be made

by moving the lock segment slightly on

the lock segment assembly.

6. After the handle casting is in the final,

properly adjusted position, verify the

four clamp bolts are fully tightened.

Then, tighten both piercing set

screws until each screw pierces

through the wall of the pipe.

Note: When tightening these piercing set

screws, the resistance will keep increasing

and then will drop off sharply once the

pipe is pierced. Fully tighten the piercing

set screws until the shoulder of the

piercing set screw is firmly placed against

the pipe (refer to Figure 8: After piercing).

7. The piercing set screws help assure

that when the air switch handle is

thrown open or closed, the vertical

pipe will definitely rotate with the

handle.

8. Ground the lock segment/handle

assembly to the pole ground using a #2

or larger flexible copper wire (refer to

Figure 9: Grounding).

Item

Description

Point A

Operating handle

Figure 7: Operating handle

After piercing

Item

Description

Slug from pierced

pipe

Figure 8: Before piercing

Item

Description

#2 pole ground wire

or larger

Split-bolt connector

Pole

Figure 9: Grounding