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S&C Instruction Sheet 811-510

Assembling the Loadbuster Loadbreak Tool

Step 44

For Loadbuster Loadbreak Tool Catalog Number 5300R3-E,
install the extended insulating hood. See Figure 49.

Extended insulating hood

Figure 49. For Loadbuster Loadbreak Tool Catalog 5300R3-E,

install the extended insulating hood.

Step 45

After reassembly, reset the Loadbuster Loadbreak Tool.
Hold with the inner tube extended, and lift the resetting
latch with your thumb. With the latch up, press down on the
inner tube assembly until the tool is closed completely so
the trigger can reset itself. When reset properly, the orange
inner tube will no longer be visible.

Check for proper resetting by extending the tool about

three inches (76 mm) until you feel increasing spring resis-
tance. Operate the tool several times to make sure the trig-
ger and resetting latch perform properly. Refer to Instruc-
tion Sheet 811-505 for complete operation instructions.

Step 46

Make sure the trip force is between 20 and 27 lbs. for
Loadbuster Loadbreak Tool 5300R3 (20 to 29 lbs. for
Loadbuster Loadbreak Tool 5400R3) by securing the hook
frame assembly and pulling open the tool using a force
gauge attached to the anchor assembly.

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Содержание Loadbuster

Страница 1: ...on Sheet 2 Retain this Instruction Sheet 2 Video 2 Proper Application 2 Warranty 2 Safety Information Understanding Safety Alert Messages 3 Following Safety Instructions 3 Replacement Labels and Instructions 3 Location of Safety Labels 4 Before Starting 5 Disassembling the Loadbuster Loadbreak Tool 6 Inspecting the Key Parts of the Loadbuster Loadbreak Tool 12 Assembling the Loadbuster Loadbreak T...

Страница 2: ... is only intended for specific switching applications When used with appropriately designed hook equipped disconnects cutouts power fuses dropout reclosers fuse limiters and pad mounted gear the Loadbuster Load break Tool is suitable for the live switching of single or three phase overhead distribution circuits through 34 5 kV and underground distribution circuits through 25 kV These appli cations...

Страница 3: ...E NOTICE identifies important procedures or requirements that can result in product or property damage if instructions are not followed Following Safety Instructions If you do not understand any portion of this instruction sheet and need assistance contact your nearest S C Sales Office or S C Authorized Distributor Their tele phone numbers are listed on S C s website sandc com or call S C Headquar...

Страница 4: ... Information Location Safety Alert Message Description Part Number A NOTE To ensure resetting depress telescoping tube until orange band G 5840R1 B WARNING RESET AFTER EACH OPERATION To check for proper resetting G 4401 for 5300R3 G 4401 for 5300R3 E G 4320 for 5400R3 Location of Safety Labels ...

Страница 5: ...els Liquid abrasive type household cleanser Degreasing dish soap Bottle brush Four trigger screws and one set screw have integral nylon gaskets that will need to be replaced with new hardware Make sure you have the replacement trigger assembly hard ware and socket head set screw before disassembling your Loadbuster Loadbreak Tool S C also recommends having on hand a new inner tube seal a moving co...

Страница 6: ...use minor injury Tube cover Figure 1 Use a mallet to loosen the tube cover End cap Contact tube Figure 2 Unscrew the end cap and pull it out until the Load buster Tool trips Push the end cap into the tube until the contact tube is inside the chassis Step 2 To prevent spinning use a 7 16 inch combination wrench to hold the locknut on the underside of the end cap steady Use an appropriately sized fl...

Страница 7: ...Discard the screws See Figure 5 Screws 4 Trigger assembly Figure 5 Remove the four screws securing the trigger assem bly to the inner tube assembly Remove the trigger assembly Step 4 Withdraw the moving contact assembly and then slide off the guide bearing See Figure 6 Guide bearing Moving contact assembly Figure 6 Remove the moving contact assembly and slide off the guide bearing Step 5 Carefully...

Страница 8: ...d a screwdriver or other pry tool to loosen and remove the retaining ring securing the anchor assembly to the inner tube assembly See Figures 9 10 and Figure 11 on page 9 Inner tube assembly Retaining ring Figure 9 Use a hammer and screwdriver to loosen the ring Inner tube assembly Retaining ring Anchor assembly Figure 10 Pry the retaining ring until it comes off of the inner tube assembly ...

Страница 9: ...or assembly See Figure 11 Anchor assembly Retaining ring Anchor assembly Figure 11 Remove the retaining ring and anchor assembly Step 9 Use a 5 32 inch Allen key to remove the socket head set screw Discard the set screw See Figure 12 Allen key in set screw Figure 12 Remove and discard the set screw ...

Страница 10: ...bly from inside the inner tube See Figure 13 Stationary contact assembly Inner tube Figure 13 Remove the stationary contact Step 11 Remove the chassis cover by slightly prying the cover equally on both sides and sliding off the chassis See Figure 14 Pull out using both hands Chassis cover Figure 14 Remove the chassis cover ...

Страница 11: ...r Inner tube seal Chassis Figure 15 Remove the bearing retainer from the chassis along with the inner tube seal and the bearing Step 13 Use a drift pin or S C spanner wrench NA 1057 in the wrenching hole to unscrew the contact tube from the moving contact assembly Remove the tube See Figure 16 This concludes the Loadbuster tool disassembly Spanner Contact tube Moving contact assembly Figure 16 Uns...

Страница 12: ... moving contact Thoroughly rinse and dry the assembly immediately after cleaning DO NOT submerge the moving contact assembly in water or cleaning solution See Figure 18 b If necessary use an Emery cloth to polish the moving contact Avoid heavy filing that would change the dimensions c Pull either end of the assembly to extend the spring Examine the flexible cable inside the spring for signs of wea...

Страница 13: ...or scratches Figure 20 Inspect the inner tube assembly Step 17 Inner tube seal Inspection Examine the inner tube seal Replace the seal if it is cracked deformed or damaged in any way S C recommends replacing the inner tube seal when the inner tube assembly is replaced See Figure 21 Check for cracks in the seal Figure 21 Inspect the inner tube seal Step 18 Stationary contact assembly inspection Use...

Страница 14: ... springs Replace the resetting latch if it is deformed or damaged See Figure 24 Resetting Latch Check the condition of the resetting latch Detail view Figure 24 Inspect the resetting latch Step 21 Hook frame attachment assembly inspection Look for excessive burning or pitting on all contact surfaces on the hook frame attachment assembly Make sure the pull ring hook is straight and the spring in th...

Страница 15: ...ssing or faded product labels See Figure 26 and refer to page 4 Chassis Hook frame assembly should open freely Shunt strap Hook frame assembly should rotate freely Figure 26 Inspect the chassis Step 23 Bearing and bearing retainer inspection Examine the bearing and bearing retainer for evidence of mechanical damage See Figure 27 Replace as required Bearing Bearing retainer Figure 27 Inspect the be...

Страница 16: ...ct end of the inner tube assembly c Slide the inner tube seal onto the assembly If the seal is difficult to put on the inner tube assembly expand its inner diameter somewhat by rotating it against a thumbnail or other smooth object Use care to avoid damaging the seal The seal material has a memory and will soon return to its original shape Immediately place the flared edge of the inner tube seal s...

Страница 17: ...ssis Step 28 Thread the bearing retainer firmly onto the chassis See Figure 33 Chassis Bearing retainer Figure 33 Thread the bearing retainer onto the chassis Step 29 Reinstall the chassis cover See Figure 34 Chassis cover Figure 34 Install the chassis cover Step 30 Extend the inner tube assembly approximately two inches 51 mm See Figure 35 2 inches Inner tube assembly Figure 35 Extend the inner t...

Страница 18: ...ning ring Position the retaining ring so the concave shape is toward the anchor assembly Use a hammer or mallet to secure the ring in place around the inner tube assembly and the anchor assembly See Figure 37 Retaining ring Figure 37 Reinstall the retaining ring Make sure the ring is bowed toward the surface of the anchor assembly Tap it into place with a mallet Step 33 Reinstall the silencer on t...

Страница 19: ...ring over the open end of the contact tube See Figure 40 Guide bearing Figure 40 Install the guide bearing Step 36 Apply a light coating of DC MOLY GN paste lubricant to the trigger end of the moving contact assembly See Figure 41 Moving contact assembly Figure 41 Apply lubricant to the trigger end of the moving contact assembly Step 37 Insert the moving contact assembly into the inner tube assemb...

Страница 20: ...embly Figure 44 Insert the trigger into the inner tube assembly Depress the trigger to extend the moving contact assembly Step 40 Rotate the anchor assembly as required to center the anchor with the pull ring hook Using 4 new screws attach the trigger assembly to the inner tube assembly aligning the guide pin on the trigger assembly with the slot in the chassis See Figure 45 Rotate anchor to cente...

Страница 21: ... screw last See Figure 46 Retaining screw and set screw End cap Figure 46 Install the end cap Step 42 Apply a light coating of petroleum jelly to the threads of the end cap Screw the end cap firmly into the chassis See Figure 47 End cap End cap Figure 47 Lubricate the threads of the end cap and screw the end cap into the chassis Step 43 Install the tube cover See Figure 48 Figure 48 Install the tu...

Страница 22: ...be assembly until the tool is closed completely so the trigger can reset itself When reset properly the orange inner tube will no longer be visible Check for proper resetting by extending the tool about three inches 76 mm until you feel increasing spring resis tance Operate the tool several times to make sure the trig ger and resetting latch perform properly Refer to Instruc tion Sheet 811 505 for...

Страница 23: ... Chassis cover Socket head set screw Pull ring hook Part of hook frame attachment Locknut Chassis Trailer Guide bearing Contact tube Tube cover End cap Trigger assembly Retaining screw and set screw Moving contact assembly Resetting latch Shunt strap Red or blue dot see Note Silencer with non resettable operation counter Inner tube assembly Figure 51 Exploded view of the Loadbuster Loadbreak Tool ...

Страница 24: ...ap includes screw and locking washer 5300R3 and 5300R3 E NA 1046 1 15 5400R3 NA 1046 2 22 Hook Frame Attachment Assembly includes pull ring hook pivot pivot contact and appropriate springs and roll pins 5300R3 5300R3 E and 5400R3 NA 1047 3 86 Chassis Cover includes label 5300R3 5300R3 E and 5400R3 NA 1063 2 57 Tube Cover 5300R3 5300R3 E and 5400R3 N 1125 15 Moving Contact Assembly Parts Complete M...

Страница 25: ... G 4585 8 Instruction Sheet 5300R3 5300R3 E and 5400R3 811 505 22 Services Complete Overhaul 5300R3 5300R3 E and 5400R3 Includes hardware sufficient to service 10 tools Requires DC MOLY GN lubricant listed above Upgraded tools can be operated 1 500 to 2 000 times before inspec tion and maintenance are required Contains lubricant sufficient to service approximately 10 tools Used to remove contact t...

Страница 26: ...s Catalog Numbers 5300R3 5300R3 E and 5400R3 and manufactured between May 1983 and August 2002 can be upgraded to achieve an enhanced operating life of 1 500 to 2 000 operations before inspection and maintenance are required See applicable upgrade kits in the Table 1 on page 25 Replacement Parts ...

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