S&C VacuFuse II Quick Operation Manual page 2

VacuFuse II Self-Resetting Interrupter—Quick Operation Guide
®
Outdoor Distribution (7.2 kV through 15 kV)
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 "Installation" section of
S&C Instruction Sheet 465-510.
Installation using insulated gloves: With the OPEN/CLOSE lever in the Open position,
insert the VacuFuse II interrupter into a 110-kV or a 125/150-kV BIL-rated mounting with
gloved hands, as shown in Figure 3.
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.
Confirm the VacuFuse II interrupter is in the Open position by viewing its
STEP 1.
POSITION indicator. Place the OPEN/CLOSE 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 (183 to 305 cm) 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 4.
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.
Disengage the prong from the pull-ring, taking care to avoid pulling the
STEP 6.
VacuFuse II interrupter open.
2 S&C Instruction Sheet 466-501
Removing the VacuFuse II Interrupter from the Cutout Mounting.
WARNING
DO NOT attempt to remove a VacuFuse II interrupter from its cutout mounting
with the vacuum interrupter in the Closed position. The vacuum interrupter is in
the Closed position when the POSITION indicator at the base of the VacuFuse
II interrupter displays a red target. Removing the VacuFuse II interrupter from its
cutout mounting with the vacuum interrupter in the Closed position may cause
arcing, equipment damage, serious injury, or death.
STEP 1. Open the vacuum interrupter by pulling down on the yellow OPEN/CLOSE
lever. Confirm the POSITION indicator at the base of the VacuFuse II interrupter
displays a green target. See Figure 5.
STEP 2. Wait about one minute until the VacuFuse II interrupter drops out.
If the VacuFuse II Self-Resetting Interrupter stays in its cutout mounting, confirm
the POSITION indicator at the base of the VacuFuse II interrupter displays a green
target. In this case, the VacuFuse II interrupter may not be powered and cannot drop
out. 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 interrupter disengages from the closed-into cutout position. A swift,
firm pull will be required.
If the VacuFuse II Self-Resetting Interrupter is in its cutout mounting with the vacuum
interrupter 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 of S&C Instruction Sheet 465-510.
Trunnion
Figure 3. Guiding or removing the trunnion from
the hinge using gloved hands.
DO NOT attempt to open a VacuFuse II Self-Resetting Interrupter that is in the
Closed position without using a loadbreak tool, such as S&C's Loadbuster tool. An
arc started by opening a VacuFuse II Self-Resetting Interrupter under load without
a loadbreak tool can cause equipment damage, serious injury, or death.
Instructions for using S&C's Loadbuster tool can be found in S&C Instruction Sheet
465-510.
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 3.
Understanding the LED Indicators
Two LEDs are on the base of the VacuFuse II interrupter. See Figure 5.
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 voltage is in
the cutout mounting and the vacuum interrupter is open. When full charge is achieved,
the charging LED will continue flashing and the READY TO CLOSE LED will illuminate
and the CHARGING LED will continue blinking.
Note: Information on troubleshooting the VacuFuse II Self-Resetting Interrupter can
be found in S&C Instruction Sheet 465-510.
45°
Figure 4. Guiding or removing the trunnion from the hinge
using a Talon Handling Tool.
WARNING
POSITION indicator
in the Open (green)
position
CHARGING
LED
READY TO CLOSE
LED
Figure 5. A VacuFuse II Self-Resetting Interrupter (vacuum
interrupter open).