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24    S&C Instruction Sheet 465-500

Troubleshooting

To perform this operation smoothly, always 

roll the Loadbuster tool so that it rotates in an 
upward direction.

STEP  7.  

To reset the Loadbuster tool for the next 
operation, hold it as shown in Figure 28. Extend 
the tool slightly and lift the resetting latch with 
your thumb. With the latch up, telescope the tool 
completely so the trigger can reset itself. 
Depress the telescoping tube until the orange 
paint on the inner tube assembly is no longer 
visible. 

Check for proper resetting by extending the 

tool about 3 inches (76 mm). Throughout this 
travel, an increasing spring resistance should 
be felt.

Note:

 When the VacuFuse Self-Resetting Interrupter is 

opened with a Loadbuster tool, the vacuum interrupter 
inside the VacuFuse interrupter will not be triggered open 
and will remain closed.

Resetting latch

Figure 28. Resetting a Loadbuster tool.

Summary of Contents for VacuFuse

Page 1: ...ons and Labels 5 Location of Safety Labels 6 Safety Precautions 7 Shipping and Handling Inspection 8 Packing 8 Handling 8 Storage 8 Returning 8 Installation Before Starting 9 Installing a VacuFuse Sel...

Page 2: ...These instructions are intended ONLY for such qualified persons They are not intended to be a substitute for adequate training and experience in safety procedures for this type of equipment Read this...

Page 3: ...d have a maximum voltage rating equal to or greater than system line to line voltage when used in phase to phase applications The VacuFuse Self Resetting Interrupter can be applied on the primary side...

Page 4: ...d or obligations described in S C s Price Sheet 150 Standard Conditions of Sale Immediate Purchasers in the United States or Price Sheet 153 Standard Conditions of Sale Immediate Purchasers Outside th...

Page 5: ...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 assist...

Page 6: ...n for Safety Labels Location Safety Alert Message Description Part Number A DANGER VacuFuse Self Resetting Interrupter may be energized G 9740 B Fuse Link TCC Curve Label displaying the VacuFuse inter...

Page 7: ...in accordance with safe operating procedures and rules 4 SAFETY LABELS Do not remove or obscure any of the DANGER WARNING CAUTION or NOTICE labels and tags Remove tags ONLY if instructed to do so 5 EN...

Page 8: ...XS Cutout Mounting and miscellaneous mounting hardware for securing the VacuFuse Self Resetting Interrupter to the pole Handling NOTICE DO NOT DROP the VacuFuse Self Resetting Interrupter or subject...

Page 9: ...urself with the parts of the VacuFuse Self Resetting Interrupter See Figure 3 Figure 3 VacuFuse Self Resetting Interrupter Overview Hinge end contact Jaw end contact Trunnion Pull ring Hand grip MODE...

Page 10: ...urnished only if specified through the addition of catalog number suffix B or C to the VacuFuse interrupter catalog number Note the placement of the external tooth lockwasher between the mounting brac...

Page 11: ...hen the unit was in Auto mode the device will operate in Auto mode If a fault is present the device will trip and enter its test sequence When closing with the MODE SELECTOR lever down The VacuFuse Se...

Page 12: ...STEP 5 Disengage the prong from the pull ring taking care to avoid pulling the VacuFuse interrupter open STEP 6 Verify the MODE SELECTOR lever is in the proper position for the application either in t...

Page 13: ...ne minute See Figure 9 Follow these steps if the VacuFuse Self Resetting Interrupter has operated and is in the Open position STEP 1 Remove the VacuFuse Self Resetting Interrupter from its mounting if...

Page 14: ...e VacuFuse interrupter is powered the LED will flash white at a 30 second interval to indicate a healthy condition If the VacuFuse interrupter is in an unhealthy state the white LED will fast blink at...

Page 15: ...ter WARNING Do not close the VacuFuse Self Resetting Interrupter found in the Open position using the OPEN CLOSE lever until the cause of the fault current has been determined and repaired The VacuFus...

Page 16: ...in the Auto mode position Figure 18 on page 17 shows the MODE SELECTOR lever down in the NR non reclose mode position Auto Mode In the Auto mode the VacuFuse inter rupter will respond to fault curren...

Page 17: ...ling Tool or a distribution prong See Figure 19 The lever will lock into the vertical position To place the MODE SELECTOR lever in the Auto mode Rotate the MODE SELECTOR lever to the Up position using...

Page 18: ...om its cutout mounting with the vacuum interrupter in the Closed position may cause arcing equipment damage serious injury or death To remove the VacuFuse interrupter from its cutout mounting STEP 1 O...

Page 19: ...e the VacuFuse Self Resetting Interrupter from a 125 kV BIL rated or a 150 kV BIL rated cutout mounting with gloved hands as shown in Figures 21 and 22 Figure 21 Lifting the trunnion out of the hinge...

Page 20: ...interrupter using the OPEN CLOSE lever If the VacuFuse interrupter will not open bypass or de energize the VacuFuse interrupter and remove it from its cutout mounting or open and de energize it using...

Page 21: ...NING DO NOT attempt to use a Loadbuster tool to open a VacuFuse Self Resetting Interrupter while climbing the pole Engagement of a Loadbuster tool in this position is difficult and may result in impro...

Page 22: ...acuFuse interrupter The Loadbuster tool should never be attached with its anchor hooked on the closest side of the VacuFuse interrupter as shown in Figures 25 and 26 Attaching the tool in this manner...

Page 23: ...with which the VacuFuse Self Resetting Interrupter is opened Avoid jerking and hesitation The resetting latch will keep it open Generally there is no indication of circuit interruption the only sound...

Page 24: ...copethetool completely so the trigger can reset itself Depress the telescoping tube until the orange paint on the inner tube assembly is no longer visible Check for proper resetting by extending the t...

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