background image

Instruction Sheet  466-501

December 19, 2022
©  S&C Electric Company 2022, all rights reserved

VacuFuse

®

 II Self-Resetting Interrupter—Quick Operation Guide

Outdoor Distribution (12.47 kV through 27.0 kV)

Understanding the LED Indicators and POSITION Indicator

LED Indicators

There are two LEDs on the base of the VacuFuse II interrupter. See Figure 2.

The CHARGING LED is white and indicates the VacuFuse II interrupter is harvesting 

energy to close the vacuum interrupter. When the VacuFuse II interrupter is powered, the 
CHARGING LED will start flashing at one flash per second as long as sufficient voltage 
is present in the cutout mounting and the vacuum interrupter is open. When full charge 
is achieved, the READY TO CLOSE LED will illuminate and the CHARGING LED will 
continue blinking.

POSITION Indicator

The POSITION indicator is located on the base of the VacuFuse II interrupter’s housing. 
It contains a highly reflective visible red or green target that indicates the position of  
the vacuum interrupter inside the device. The target is green when the vacuum  
interrupter is in the 

Open

 position and red when the vacuum interrupter is in the 

Closed 

position, unless the VacuFuse II interrupter was ordered with the “-J1” suffix 

(red open/green closed).

Installing a VacuFuse II Interrupter into the Cutout Mounting

 WARNING

Provide training to line crews on the use of both a hotstick and an extendostick 
before installing or operating the VacuFuse II Self-Resetting Interrupter. The 
VacuFuse II interrupter is different from other cutout-mounted devices. Failure to 
properly handle a VacuFuse II interrupter with a hotstick and/or an extendostick 
may lead to serious injury or death.

For instructions on how to install a cutout mounting, see the “Installing the VacuFuse II 

Self-Resetting Interrupter Mounting” section of S&C Instruction Sheet 466-500.

 WARNING

VacuFuse II Self-Resetting Interrupters must be installed, operated, and maintained 
by qualified persons knowledgeable in overhead electric power distribution equipment 
and the associated hazards. This guide is not a replacement for adequate training 
and experience in safety procedures for this product. Read S&C Instruction Sheet 
466-500 thoroughly and carefully before installing or operating your VacuFuse II  
Self-Resetting Interrupter.

 DANGER

VacuFuse II Self-Resetting Interrupters may be energized from either side and in any 
position. Always consider all parts live until de-energized, tested, and grounded.

Understanding the Closing Sequence

Note: 

The VacuFuse II Self-Resetting Interrupter is shipped from the factory with the 

vacuum interrupter in the 

Open

 position. 

When closing the VacuFuse II Self-Resetting Interrupter into the cutout mounting 

the CHARGING LED will blink at a one-second interval as long as there is sufficient 
voltage present in the cutout mounting and the vacuum interrupter is open. The READY 
TO CLOSE LED will steadily illuminate when the VacuFuse II interrupter has harvested 
enough energy to close the vacuum interrupter and when the manual operating lever is 
in the

 Down 

position.

The VacuFuse II Self-Resetting Interrupter requires 45 

±

 10 seconds to harvest enough 

energy to close the vacuum interrupter.
There are two ways to close the vacuum interrupter:

Option 1: Automatic Delayed Close

Place the manual operating lever into the 

Up

 position at any time prior to closing the unit 

into the cutout mounting, or less than 35 seconds after the CHARGING LED has begun 
blinking. When closed into the cutout mounting in this state, the CHARGING LED will 
blink at a one-second interval if there is sufficient voltage present in the cutout mounting 
and the vacuum interrupter is open. The VacuFuse II interrupter will automatically close 
the vacuum interrupter after 45 

±

10 seconds.

Option 2: Manual Close

Place the manual operating lever into the 

Down

 position prior to closing the unit into the 

cutout mounting or less than 35 seconds after the CHARGING LED has begun blinking.

Wait until the READY TO CLOSE LED illuminates and is solidly lit. At that time, the 

interrupter is ready to be closed manually by moving the manual operating lever to 
the 

Up

 position. Three seconds after the lever is moved to the 

Up

 position, the vacuum 

interrupter will close.

Always check the position of the vacuum interrupter by confirming the POSITION 

indicator at the base of the interrupter is red before walking away. See Figure 1.

Figure 1. A VacuFuse II Self-Resetting 

Interrupter (vacuum interrupter closed). 

POSITION 
indicator

LED 
indicators

Figure 2. A VacuFuse II Self-Resetting  

Interrupter (vacuum interrupter open). 

CHARGING 
LED

POSITION 
indicator in 
the Open 
(green) 
position

READY TO 
CLOSE LED

STEP  1.  

If using an existing cutout mounting: 

Visually inspect the cutout mounting 

for damage or excessive wear, particularly in the upper and lower contact 
areas. If ANY damage is visible, replace the cutout mounting before proceeding. 
DO NOT install and/or energize a VacuFuse II interrupter into a damaged  
cutout mounting.

STEP  2.  

Installation using insulated gloves: 

With the manual operating lever in the 

Up

 position, insert the VacuFuse II interrupter into the proper cutout mounting 

with gloved hands, as shown in Figure 5 on page 2.

Installation using the Talon™ Handling Tool: 

Attach a Talon Handling 

Tool to a short hotstick. Insert the curled prong of the Talon tool into the lifting 
eye of the trunnion, and raise the VacuFuse II interrupter into the mounting. 
Rotate the hotstick counterclockwise 180 degrees to disengage it.

Closing the VacuFuse II Interrupter into the Cutout Mounting

NOTICE

Read the “Understanding the Closing Sequence” section before closing the 
VacuFuse II interrupter into its cutout mounting.

STEP  1.  

Confirm the VacuFuse II interrupter is in the 

Open

 position by viewing its 

POSITION indicator. Place the manual operating lever in the correct position 
for the closing sequence desired.

STEP  2.  

Stand firmly in front of and in line with the cutout mounting. Do not operate 
standing directly underneath the VacuFuse II interrupter. If using an 
extendostick, stand from 6 to 10 feet (1.8 to 3.1 m) away from the pole.

STEP  3.  

Insert the straight prong of a Talon tool or distribution prong into the pull-ring.

STEP  4.  

Swing the VacuFuse II interrupter to within approximately 45 degrees of the 
fully 

Closed

 position. See Figure 3. 

STEP  5.  

While firmly gripping the stick, drive the VacuFuse II interrupter closed with 
forward force. Maintain the forward force until the interrupter properly closes 
and latches into the cutout mounting.

STEP  6.  

Disengage the prong from the pull-ring, taking care to avoid pulling the 
VacuFuse II interrupter open.

Figure 3. A VacuFuse II interrupter within 

approximately 45 degrees of the fully 

Closed position. 

45°

Отзывы: