S&C VacuFuse II Instruction Sheet Download Page 19

S&C Instruction Sheet 466-500    19

Operation

Figure 13. Removing the VacuFuse II interrupter with 

gloved hands. 

To prevent premature end of life, attach a 

Talon Handling Tool or a distribution prong 
to a short hotstick. Using the straight prong of 
the Talon tool or a distribution prong, pull the 
pull-ring forward until the VacuFuse II inter-
rupter disengages from the 

Closed into Cutout 

position. A swift, firm pull will be required.

If the VacuFuse II self-resetting interrupter 

is stuck in the cutout mounting in 

Abnormal

 

mode, it is necessary to check for voltage 
presence in the cutout mounting. 

If voltage is present in the cutout mounting 

and the CHARGING LED is not blinking,  

Abnormal

 mode is confirmed. 

Remove the VacuFuse II self-resetting 

interrupter from its cutout mounting using 
Loadbuster®—The S&C Loadbreak Tool. 
Then, re-install the VacuFuse II interrupter as 
described in the “Installation” section starting 
on page 9.

If there is no voltage present in the  cutout 

mounting, wait for power to be restored in the 
cutout mounting and test again for any of the 
three possible conditions. 

If the VacuFuse II Self-Resetting Interrupter 

is in its cutout mounting with the vacuum inter-
rupter in the 

Closed

 position and operating the 

OPEN/CLOSE lever to the 

Open

 position does 

not work, or the VacuFuse II interrupter is to 
be removed from its cutout mounting in the 

Closed 

position for any other reason, follow 

the instructions in the “Removing the VacuFuse 
II Interrupter from the Cutout Mounting using 
Loadbuster®—The S&C Loadbreak Tool” 
section on page 20.

STEP  3.  

Remove the VacuFuse II Self-Resetting 
Interrupter from a 110-kV BIL-rated or a 125/ 
150-kV BIL-rated cutout mounting with gloved 
hands as shown in Figure 13.

Summary of Contents for VacuFuse II

Page 1: ...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 II Interrupter in...

Page 2: ...alified persons They are not intended to be a substitute for adequate training and experience in safety procedures for this type of equipment Read this Instruction Sheet NOTICE Thoroughly and carefull...

Page 3: ...nsformers up to 150 kVA and on 15 kV transformers up to 250 kVA when mounted in a 110 or 125 150 kV BIL cutout mounting To ensure proper performance VacuFuse II interrupters must only be installed in...

Page 4: ...p out in response to a fault Warranty The warranty and or obligations described in S C s Price Sheet 150 Standard Conditions of Sale Immediate Purchasers in the United States or Price Sheet 153 Standa...

Page 5: ...rtant 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 s...

Page 6: ...e Description Part Number A WARNING A VacuFuse II Self Resetting Interrupter must be dropped out from the cutout mounting to be considered OPEN and de energized Device may be energized from either sid...

Page 7: ...remove or obscure any of the DANGER WARNING CAUTION or NOTICE labels and tags Remove tags ONLY if instructed to do so 5 ENERGIZED COMPONENTS Always consider all parts live until de energized tested a...

Page 8: ...ardware for securing the VacuFuse II Self Resetting Interrupter to the pole Handling NOTICE DO NOT DROP the VacuFuse II Self Resetting Interrupter or subject any of its parts to undue stress during in...

Page 9: ...h the parts of the VacuFuse II Self Resetting Interrupter See Figure 3 Figure 3 An overview of the VacuFuse II Self Resetting Interrupter POSITION indicator CHARGING LED OPEN CLOSE lever Hinge end con...

Page 10: ...into a damaged cutout mounting If installing in a new S C Cutout Mounting For overhead pole top style VacuFuse II Self Resetting Interrupters attach the mounting to its mounting bracket as illus trat...

Page 11: ...on on page 15 for more information Place the OPEN CLOSE lever in the correct position for the closing sequence desired See the Understanding the Closing Sequence section on page 12 STEP 2 Stand firmly...

Page 12: ...ays to close the vacuum interrupter Option 1 Automatic Delay Close Place the OPEN CLOSE lever into the Closed up position at any time before or after mounting the unit into the cutout mounting When cl...

Page 13: ...the POSITION indicator will show a green target If the over current event persists after the reclosing event the unit will lock out and drop out from the cutout mounting Follow these steps if the Vacu...

Page 14: ...s out If required by utilitypractice followthestepsinthe Removing the VacuFuse II Interrupter from the Cutout Mounting section starting on page 18 This creates a visible open gap showing the transform...

Page 15: ...rupter to power the control from its Sleep state When powered the control will remain powered if the transformer primary current does not fall below 3 5 amperes If less than 3 5 amperes of primary cur...

Page 16: ...use II Interrupter WARNING The VacuFuse II Self Resetting Interrupter is designed to protect distribution transformers from internal and external fault current A VacuFuse II interrupter found in the O...

Page 17: ...pter will trip open independently of any force still applied to OPEN CLOSE lever To Reset the OPEN CLOSE Lever Af ter Manually Closing into Fault Current When the VacuFuse II interrupter trips in resp...

Page 18: ...r displays a green target STEP 2 Wait one minute until the VacuFuse II Self Resetting Interrupter drops out If the VacuFuse II Self Resetting Interrupter stays in its cutout mounting confirm the POSIT...

Page 19: ...its cutout mounting using Loadbuster The S C Loadbreak Tool Then re install the VacuFuse II interrupter as described in the Installation section starting on page 9 If there is no voltage present in t...

Page 20: ...utout position A swift firm pull will be required Situation 3 The VacuFuse II Self Resetting Interrupter is stuck in the cutout mounting in Abnormal mode Situation 3 Action Check for voltage presence...

Page 21: ...tool to an S C Universal Pole not less than 6 feet 183 cm long 8 feet 244 cm for catalog number 5400R3 with the frame of the tool in line with the pole As shown inFigures14and15 theLoadbustertoolmust...

Page 22: ...ended to its maximum length A downward pull to open the VacuFuse II Self Resetting Interrupter extends the Loadbuster tool and charges the tool s internal spring At a predetermined point in the openin...

Page 23: ...isting the pole after the Loadbuster tool has been tripped and fully extended To perform this operation smoothly always roll the Loadbuster tool so that it rotates in an upward direction STEP 7 To res...

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