January 11, 2021
© S&C Electric Company 2019-2021, all rights reserved
Instruction Sheet 465-500
VacuFuse
®
Self-Resetting Interrupter
Outdoor Distribution (5 kV, 15 kV, and 25 kV)
For Overhead Distribution
Transformer Protection
Installation and Operation
Table of Contents
Section Page
Section Page
Introduction
Qualified Persons . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Read this Instruction Sheet . . . . . . . . . . . . . . . . . . . 2
Retain this Instruction Sheet . . . . . . . . . . . . . . . . . . . 2
Video . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Proper Application . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Operating Considerations . . . . . . . . . . . . . . . . . . . . . 4
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Safety Information
Understanding Safety-Alert Messages . . . . . . . . . . . 5
Following Safety Instructions . . . . . . . . . . . . . . . . . . 5
Replacement Instructions 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 Self-Resetting Interrupter
into the Cutout Mounting . . . . . . . . . . . . . . . . . . .10
Closing the VacuFuse Interrupter into
the Cutout Mounting . . . . . . . . . . . . . . . . . . . . . . .11
Operation
If the VacuFuse Self-Resetting Interrupter
is Found Open . . . . . . . . . . . . . . . . . . . . . . . . . . .13
If Maintenance is to be Performed
on the Transformer . . . . . . . . . . . . . . . . . . . . . . . .13
Understanding the LED Indicators
and Position Indicator . . . . . . . . . . . . . . . . . . . . . .14
Opening and Closing the
VacuFuse Interrupter . . . . . . . . . . . . . . . . . . . . . .15
Setting the MODE SELECTOR Lever . . . . . . . . . . . .16
Removing the VacuFuse Interrupter
from the Cutout Mounting . . . . . . . . . . . . . . . . . . .18
Troubleshooting
. . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Removing the VacuFuse Interrupter
from the Cutout Mounting Using
Loadbuster
®
—The S&C Loadbreak Tool . . . . . . .21
