S&C Omni-Rupter User manual

August 8, 2011© S&C Electric Company Instruction Sheet 765-500
S&C Omni-Rupter®Switches
Outdoor Distribution
14.4 kV and 25 kV
Three-Pole Side-Break Integer Style
Upright and Triangular Mounting Configurations
Catalog Number Supplement “R3” and Earliern
Installation
Table of Contents
Section Page Section Page
Introduction
Operating Considerations ........................2
Qualified Persons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Read this Instruction Sheet ......................3
Retain this Instruction Sheet......................3
Proper Application .............................3
Warranty .....................................3
Safety Information
Understanding Safety-Alert Messages ..............4
Following Safety Instructions .....................4
Replacement Instructions and Labels. . . . . . . . . . . . . . . 4
Location of Safety Labels .......................5
Safety Precautions.............................6
Packing and Inspection
Packing ......................................7
Inspection ....................................7
Installation
Operating Pipe Preparation ......................8
Mounting to Wood..............................8
Mounting the Switch Upright......................8
Mounting the Switch Triangular...................10
Installing the Optional Pole Band .................10
Installing the Vertical Operating Pipe ..............11
Installing the Operating Handle ..................13
Installing the Wildlife Protection Option ............15
Dead-Ending Conductors .......................19
Connecting High-Voltage Conductors..............19
Locking the Operating Handle ...................21
Checking Operation ...........................23
nFor installation instructions for Omni-Rupter Switches with Catalog Number Supplement “R4,” please refer to your local S&C Sales Office. These
instructions are also available on www.sandc.com.

2S&C Instruction Sheet 765-500
Introduction
Operating
Considerations ÇCAUTION
The equipment covered by this publication must be selected for a specific applica-
tion and it must be installed, operated, and maintained by qualified persons who
are thoroughly trained and who understand any hazards that may be involved. This
publication is written only for such qualified persons and is not intended to be a
substitute for adequate training and experience in safety procedures for this type
of equipment.
In most applications, these interrupter switches are capable of switching rated continuous
load currents at full voltage. Consequently, no interlocking with secondary protective
equipment is required.
Circuit making and breaking is involved in the normal operation of these interrupter
switches and, as a result, precautionary “partway” opening or closing is undesirable.
To operate, swing the operating handle through its full stroke without hesitation. Do
not assume that the operating-handle position necessarily indicates the open or closed
position of the interrupter-switch blades. Upon completion of an opening or closing
operation, visually check the position of the interrupter-switch blades to determine that
the intended position has been attained. Then tag or padlock the operating handle in
accordance with standard system operating procedures. In all cases make certain that
the operating handle is locked before “walking away.” Note: These interrupter switches
are not intended for breaking fault currents.
Qualified Persons ÇWARNING
The equipment covered by this publication must be installed, operated, and main-
tained by qualified persons who are knowledgeable in the installation, operation, and
maintenance of overhead electric power distribution equipment along with associated
hazards. A qualified person is one who is trained and competent in:
• The skills and techniques necessary to distinguish exposed live parts from nonlive
parts of electrical equipment.
• The skills and techniques necessary to determine the proper approach distances
corresponding to the voltage to which the qualified person will be exposed.
• The proper use of the special precautionary techniques, personal protective
equipment, insulating and shielding materials, and insulated tools for working
on or near exposed energized parts of electrical equipment.
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.

S&C Instruction Sheet 765-500 3
Introduction
Read this
Instruction Sheet
NOTICE
These instructions are for Omni-Rupter Switches with Catalog Number Supplement
“R3” and earlier. For installation instructions for Omni-Rupter Switches with Catalog
Number Supplement “R4,” please refer to your local S&C Sales Office. These instruc-
tions are also available on www.sandc.com.
Thoroughly and carefully read this instruction sheet before installing or operating your
S&C Omni-Rupter Switch. Familiarize yourself with “SAFETY INFORMATION” on pages
4 and 5.
Retain this
Instruction Sheet
This instruction sheet is a permanent part of your S&C Omni-Rupter Switch. Designate
a location where you can easily retrieve and refer to this publication.
Proper Application ÇCAUTION
The equipment in this publication must be selected for a specific application. The
application must be within the ratings furnished for the equipment. Refer to S&C
Specification Bulletin 765-31 for complete application information.
Warranty The standard warranty contained in S&C’s standard conditions of sale, as set forth in Price
Sheet 150, is applicable to the S&C Omni-Rupter Switch covered in this instruction sheet
except when it is power operated using a switch operator of other than S&C manufacture.

4S&C Instruction Sheet 765-500
Safety Information
Understanding
Safety-Alert Messages
There are several types of safety-alert messages which may appear throughout this instruc-
tion sheet as well as on labels and tags attached to the Omni-Rupter Switch. Familiarize
yourself with these types of messages and the importance of the various signal words,
as explained below.
ÇDANGER
“DANGER” identifies the most serious and immediate hazards which will likely
result in serious personal injury or death if instructions, including recommended
precautions, are not followed.
ÇWARNING
“WARNING” identifies hazards or unsafe practices which can result in serious
personal injury or death if instructions, including recommended precautions, are
not followed.
ÇCAUTION
“CAUTION” identifies hazards or unsafe practices which can result in minor per-
sonal injury or product or property damage if instructions, including recommended
precautions, are not followed.
NOTICE
“NOTICE” identifies important procedures or requirements that, if not followed, 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 assistance,
contact your nearest S&C Sales Office or S&C Authorized Distributor. Their telephone
numbers are listed on S&C’s website www.sandc.com. Or call S&C Headquarters at (773)
338-1000; in Canada, call S&C Electric Canada Ltd. at [phone].
NOTICE
Thoroughly and carefully read this
instruction sheet before operating your
S&C Omni-Rupter Switch.
Replacement
Instructions
and Labels
If you need additional copies of this instruction sheet, contact your nearest S&C Sales
Office, S&C Authorized Distributor; S&C Headquarters, or S&C Electric Canada Ltd.
It is important that any missing, damaged, or faded labels on the equipment be replaced
immediately. Replacement labels are available by contacting your nearest S&C Sales
Office, S&C Authorized Distributor, S&C Headquarters, or S&C Electric Canada Ltd.

S&C Instruction Sheet 765-500 5
Location of Safety Labels
Safety Information
REORDER INFORMATION FOR SAFETY LABELS
Location Safety Alert Message Description Number
AÇDANGER Switches may be energized from either side and with blades in
any position. G-6580-1
BÇDANGER Switches may be energized from either side and with blades in
any position. G-6580-2
CÇWARNING Lifting Instructions G-5928R3
DÇWARNING Lifting Instructions G-10030
ENOTICE Do not remove this lifting bracket until . . . G-4776R1
FNOTICE To avoid overloading the terminal pads . . . G-9094
aThis label is placed on both sides of switch base on opposite ends. dThis part is a tag which is to be removed and discarded after the
switch is installed and adjusted.
A
D
F
C
B
EF

6S&C Instruction Sheet 765-500
Safety Precautions
ÇDANGER
Omni-Rupter Switches operate at high voltage. Failure to observe the precautions
below will result in serious personal injury or death.
Some of these precautions may differ from company operating procedures and rules. Where
a discrepancy exists, users should follow their company’s operating procedures and rules.
1. QUALIFIED PERSONS. Access to switches and
controls must be restricted only to qualified persons.
See “Qualified Persons” on page 2.
2. SAFETY PROCEDURES. Always follow safe operat-
ing procedures and rules.
3. PERSONAL PROTECTIVE EQUIPMENT. Always
use suitable protective equipment such as rubber
gloves, rubber mats, hard hats, safety glasses, and flash
clothing in accordance with safe operating procedures
and rules.
4. SAFETY LABELS AND TAGS. Do not remove or
obscure any of the “DANGER,” “WARNING,” “CAU-
TION,” 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, and grounded.
6. LOAD-INTERRUPTER SWITCH POSITION.
Always confirm the open/close position of load-inter-
rupter switches by visually observing the position of
the blades. Switches may be energized from either side
and with the blades in any position.
7. MAINTAINING PROPER CLEARANCE. Always
maintain proper clearance from energized components.
8. OPERATION. Circuit making and breaking is involved
in the normal operation of this interrupter switch and,
as a result, “partway” opening or closing is undesirable.
To operate, swing the operating handle through its full
travel vigorously and without hesitation. See “Checking
Operation” on page 23.

S&C Instruction Sheet 765-500 7
Packing and Inspection
Packing Study the erection drawing carefully and check the bill of material to be sure that all
parts are at hand. Standard Minor Modification parts are shown on the bill of material
under the suffix specified: “-S1,” “-S2,” “-S6,” “-S6L,” “-V1,” “-V2,” or “-V3.”
When a Standard Mounting Arrangement is specified, the shipment will include:
1. A three-pole interrupter switch, complete with interphase drive, factory-assembled
on a single base. (Upright-mounted or triangular-mounted.)
2. Four 610vertical-operating pipe sections, predrilled, where required, for attach-
ment to the universal couplings.
3. Miscellaneous mounting hardware (less through-bolts) for securing the Omni-Rupter
switch to the pole.
4. The appropriate set of operating-mechanism components for the vertical operating
pipe; e.g. handle, guide bearings, and couplings—each tagged and keyed to the bill of
material for ready identification.
5. If a Standard Minor Modification of a Standard Mounting Arrangement is specified,
the appropriate parts, as identified in the bill of materials under suffix : “-S1,” “-S2,”
“-S6,” or “-S6L” will be included with the operating-mechanism components. Specifi-
cally, the modifications designated by these suffixes are:
-S1 One tubular fiberglass insulating section in vertical operating shaft.
-S2 One Cypoxy® Insulator unit in vertical operating shaft.
-S6 Key interlock—single lock for “locked open” application.
-S6L Provisions only for key interlocks—mounting bracket for interlock.
“-V1,” “-V2,” or “-V3”—adds (one, two, or three respectively) extra 610lengths of
pipe and includes the appropriate number of extra couplings and guides.
6. A detailed erection drawing (ED) for the Omni-Rupter will be found in a water-
resistant envelope shipped with the switch. If a Standard Mounting Arrangement is
to be used, this erection drawing is a printed sheet. This same sheet is also furnished
when a Standard Minor Modification of a Standard Mounting Arrangement is to be
used. In the latter case, a copy of RD-3469 (Standard Minor Modifications, Rotating-
Type and Reciprocating-Type Operating Mechanisms) is included.
Drawings for Standard Mounting Arrangements show only minimum or suggested
locating dimensions for the vertical-operating-pipe guide bearings and the operating-
handle assembly. Specific locations are to be determined either on the job or by the
user’s engineering department.
Inspection Examine the shipment for external evidence of damage as soon after receipt as possible,
preferably before removal from the carrier’s conveyance. Check the bill of lading to make
sure that shipping skids, crates, and containers listed thereon are present:
If there is visible loss and/or damage:
1. Notify the delivering carrier immediately.
2. Ask for a carrier inspection.
3. Note condition of shipment on all copies of the delivery receipt.
4. File a claim with the carrier.
If concealed damage is discovered:
1. Notify the delivering carrier within 15 days of receipt of shipment.
2. Ask for a carrier inspection.
3. File a claim with the carrier.
Also notify S&C Electric Company in all instances of loss and/or damage.
Each integer style Omni-Rupter switch is factory-assembled on a common base. All
switch adjustments, including those of the interphase drive, are made at the factory to
ensure proper switch operation during opening and closing. Ease of installation is assured
by following these step-by-step instructions.

8S&C Instruction Sheet 765-500
Installation
Operating Pipe Preparation
If desired, the vertical operating pipe can be cut
to length (if not precut at the factory) before
proceeding to the job site. The standard lengths
of pipe supplied measure 6-10. Cutting dimen-
sions are shown on the erection drawing.
Mounting to Wood
When mounting the switch and its operating
mechanism to a wood pole, it is recommended
that suitably sized square washers be placed
under the nuts. The use of spring-type washers
between the square washers and nuts is also
recommended to compensate for wood-pole
shrinkage and thus maintain fastener tightness.
Step 1
Drill two ¹¹⁄₁₆-inch diameter holes in the utility
pole at the desired height for mounting the
switch. Refer to the erection drawing for details.
Step 2
Insert two ⁵⁄₈-inch diameter through-bolts (not
furnished) in the holes drilled in Step 1 and
secure loosely with the necessary square wash-
ers and nuts in such a manner that the heads of
the bolts project sufficiently from the face of
the pole to engage the switch-base mounting
bracket.
Mounting the Switch—Upright
Mounting Configuration
Step 3
ÇWARNING
Lift the switch using the lifting brackets
provided. Do not allow lifting slings to stress
switch parts. Avoid allowing switch to swing
while lifting.
Lifting the switch by the live parts or pole-
unit bases will damage the switch. Rough
handling may cause misalignment of the
blades and contacts.
Failure to lift the switch properly
can result in switch damage, causing
improper operation, arcing or electri-
cal shock.

S&C Instruction Sheet 765-500 9
Installation
Figure 1. Hoisting upright mounting configuration Omni-Rupter switch
into position.
Keyhole
Lifting bracket
Slotted hole
Wood support members attached to switch base
(remove and discard after switch is mounted)
NOTICE
DO NOT remove the lifting brackets until
the switch has been lifted into place and
bolted to the pole.
Switches in the upright mounting configuration
are provided with two lifting brackets bolted
to a 44wood support member which is, in
turn, attached to the switch base. See Figure 1.
Since the wood support member is also a part
of the shipping skid, use care to avoid damage
to it during unpacking.
a. Make sure that the switch is fully closed.
b. Attach lifting slings ONLY to the lifting brack-
ets bolted to the wooden support members.
c. Lift the switch as shown in Figure 1 until the
lifting slings are just taut.
d. Unbolt the wooden supports from the ship-
ping skid.
e. Slowly and carefully lift the switch to the
proper mounting height.
f. Guide the switch so that the through bolts
projecting from the utility pole slip into the
holes in the switch’s pole-saddle. (The pole-
saddle is provided with a keyhole and an
open slotted-hole for ease of installation.)
g. Lower the switch so that the pole-saddle
bears down on the through bolts.
h. Securely tighten the through-bolts.
i. Remove wooden supports and lifting
brackets.
If desired, a crossarm brace (user-furnished)
may be attached to the base. Mounting brackets
for crossarm braces must be specified sepa-
rately. Contact your local S&C Sales Office for
details

10 S&C Instruction Sheet 765-500
Installation
Figure 2. Hoisting Omni-Rupter switch into position for triangular mount-
ing configuration.
Dead-ending
bracket
Vertical support
member
Open slotted hole
Hoisting slings
Figure 3.Typical pole-band attachment detail (upright mounting configu-
ration illustrated).
Pole saddle
Through-bolts
(provided by customer)
¹⁄₂-inch lag screw
Pole band
J-bolt
¹⁄₄13
stiffening block
Second lag screw installed diagonally opposite on lower corner
of mounting bracket.
Mounting the Switch—Triangular
Mounting Configuration
ÇWARNING
Lift the switch using the lifting brackets
provided. Do not allow lifting slings to stress
switch parts. Avoid allowing switch to swing
while lifting.
Lifting the switch by the live parts or pole-
unit bases will damage the switch. Rough
handling may cause misalignment of the
blades and contacts.
Failure to lift the switch properly
can result in switch damage, causing
improper operation, arcing or electri-
cal shock.
a. Make sure that the switch is fully closed.
b. Attach lifting slings ONLY to the vertical
switch support member by looping around
the dead-ending bracket and the switch
mounting weldment.
c. Lift switch as shown in Figure 2 until the
lifting slings are just taut.
d. Unbolt the wooden supports from the ship-
ping skid.
e. Slowly and carefully lift the switch to the
proper mounting height.
f. Guide the switch so that the through bolts
projecting from the utility pole slip into the
holes in the switch’s pole-saddle. (The pole-
saddle is provided with a keyhole and an
open slotted-hole for ease of installation.)
g. Securely tighten the through-bolts.
h. Remove the lifting slings from the switch.
Installing the Optional Pole Band
Step 4
Secure the pole-band (optional) to the mounting
bracket on the switch, using the J-bolts pro-
vided. See Figure 3. Two ¹⁄₄13stiffening
blocks are furnished to be used behind the pole-
band flanges, and underneath the J-bolt nuts.
Lag the pole band to the back side of the pole
through the hole in the center of the band, using
one of the three ¹⁄₂-inch diameter lag screws
provided. Then, lag the mounting bracket to the
pole using the two remaining ¹⁄₂-inch lag screws
as shown in Figure 3.

S&C Instruction Sheet 765-500 11
Installation
Figure 4. Attaching uppermost vertical operating pipe to switch for upright
mounting configuration.
Universal coupling
Vertical operating
pipe
Figure 5. Attaching uppermost vertical operating pipe to switch for
triangular mounting configuration.
Universal
coupling Vertical
operating pipe
If desired, a crossarm brace (user-furnished)
may be attached to the base for switches in
the upright mounting configuration. Mounting
brackets for crossarm braces must be specified
separately. Consult your nearest S&C Sales
Office for details.
Installing the Vertical Operating Pipe
Step 5
S&C recommends making up each coupling as
work progresses. When installing operating pipe
in a rigid coupling, make certain that the cutting
tip of the piercing set screw does not protrude
through the body of the coupling. Torque the
clamp bolt to final tightness. Then, tighten
the piercing set screw, piercing the pipe, and
continue turning until a firm resistance is felt.
NOTICE
Installing Piercing Set Screws
This equipment uses piercing set screws
to couple the operating mechanism to the
operating pipe, and to provide stability to
couplings joining one or more lengths of
pipe.
Before assembling a coupling, back the
piercing set screw out of the coupling so
that the tip does not protrude into the body
of the coupling. This ensures that the cou-
pling’s clamp screws can be fully-tightened.
After tightening the clamp bolts to their
final torque, tighten the set screws to pierce
and/or crimp the pipe.
Step 6
Locate the universal coupling that is shipped in
the carton of switch ED parts. Attach the univer-
sal coupling to the rotating shaft of the toggle
mechanism using the ¹⁄₂-inch stainless-steel pin,
flatwasher, and cotter pin provided. See Figure
4 or 5, as applicable. Install the uppermost sec-
tion of predrilled vertical operating pipe on the
universal coupling as shown. Then, secure the
vertical operating pipe to the universal coupling
using the ¹⁄₂—13 2¹⁄₂ bolt, flatwasher, and nut
provided. If only one vertical pipe section is
used, omit Steps 6 through 9 and proceed to
Step 10.

12 S&C Instruction Sheet 765-500
Step 7
Install a universal coupling on the lower end
of the uppermost section of vertical operating
pipe in the fashion described above, using the
¹⁄₂—13 2¹⁄₂ bolt and ¹⁄₂—13 nut provided. See
Figure 6.
Step 8
Position and install the guide bearing assembly
on the pole in accordance with the dimension
shown on the erection drawing.
Step 9
Pass the next section of vertical operating pipe
up through the guide bearing and attach it to
the universal coupling on the lower end of the
uppermost vertical-operating-pipe section. See
Figure 6.
Step 10
Repeat Steps 7 and 8 if additional sections of
vertical operating pipe and guide bearing assem-
blies are specified. These additional sections of
vertical operating pipe will be joined with rigid
couplings rather than universal couplings. See
Figure 7. Make certain the cutting tips of the
piercing set screws in the rigid coupling do not
protrude through the body of the coupling when
inserting sections of vertical operating pipe into
the coupling. After the pipe is in place, torque
the clamp bolts to final tightness; then tighten
the associated piercing set screws, piercing the
pipe, and continue turning until a firm resistance
is felt.
Installation
Figure 6. Guide bearing assembly and universal coupling (upper
position).
Uppermost pipe
section
¹⁄₂213 2¹⁄₂ bolts (2)
Universal coupling
(rigid couplings used
below this group)
Guide bearing
assembly
Alignment-adjusting slots
Gaining channel (used
on round poles only)
Figure 7. Guide bearing assembly and rigid coupling (intermediate
positions).
Clamp bolts (2)
Rigid coupling
Alignment-adjusting
slots
Gaining channel (used
on round poles only)
Guide bearing
assembly
Piercing
set screws (2)

S&C Instruction Sheet 765-500 13
Installation
Installing the Operating Handle
Step 11a
Install the operating-handle assembly on the
lowest section of vertical operating pipe at the
location indicated on the erection drawing.
Make certain the cutting tip of the piercing set
screw in the operating-handle assembly does
not protrude through the clamp when install-
ing the assembly on the vertical operating
pipe. After the operating-handle assembly is
in place, tighten the piercing set screw on the
operating-handle assembly, piercing the pipe,
and continue turning until a firm resistance is
felt. See Figure 8.
Slide the foot bearing assembly onto the
lowest vertical-operating-pipe section and bolt
it to the pole at the position shown on the erec-
tion drawing. At the same time, use one of the
mounting bolts to attach one end of the ground-
ing strap (the end with the grounding connector
attached) to the foot bearing assembly.d
If necessary to compensate for the taper of the
wood pole, and to keep the vertical operating
pipe aligned and plumb, shift the guide bear-
ings toward or away from the pole. Alignment
slots are provided for this purpose. See Figures
6 and 7.
Step 12
Fasten the free end of the grounding strap to
the lowest vertical-operating-pipe section a few
inches above the operating-handle assembly (or
key interlock) with the U-bolt connector pro-
vided for this purpose. Then connect the lower
end of the strap to a suitable earth ground,
fusing the grounding connector provided at that
end of the strap.dSee Figure 8.
Step 13
Open and close the interrupter switch slowly
to see that no operating difficulties are encoun-
tered due to undetected damage in shipping.
(This applies only when checking for alignment
and complete closure; when in service the inter-
rupter switch should be opened or closed vigor-
ously through its full travel without hesitation
at any point. Be prepared to apply additional
force to maintain full speed when operating
effort increases as the switch blades engage
the interrupters.)
aWhen a key interlock is furnished (Standard Minor
Modification Suffix “-S6”), refer to Step 21 at this point.
dThe grounding recommendations herein may differ
from the standard operating and safety procedures of cer-
tain electric utility companies. Where a discrepancy exists,
the operating procedures of the electric utility apply.
Figure 8. Foot bearing assembly and operating-handle assembly.
Vertical-operating-pipe
section
Swing-away hasps for
padlocking
Handle
Foot bearing support plate
Piercing set screw
Gaining channel (used
on round poles only)
Grounding connector (for earth
ground connection—see text)d
Grounding strap

14 S&C Instruction Sheet 765-500
Step 14
ÇCAUTION
Adjust the stop plates to remove all excess
play from the operating mechanism and to
attain proper “windup” tension before ener-
gizing the switch.
Slack in the operating pipe may allow
the switch to creep out of the fully-closed
position.
Failure to properly adjust the handle
may cause contact overheating or arcing,
damaging the blade contacts. Injury to
operating personnel may result.
Loosen the bolts which secure the adjustable
stop plates to the foot bearing support plate.
See Figure 9. Place the switch in the fully-open
position and adjust the open-position stop plate
so that the handle, when lowered, fits into the
open-position slot. Mark, on the support plate,
the location of the open-position stop plate.
Fully close the switch and apply sufficient
pressure to the handle in the closing direction
to remove all play in the operating-pipe linkage.
Now adjust the closed-position stop plate so that
the handle will require even greater pressure to
force it into the closed-position slot. Mark, on
the support plate, the location of the closed-
position stop plate.
While holding both stop plates in the previ-
ously marked positions, torque the bolts to
secure the stop plates to the support plate.
Move the handle to the switch-open position
and verify that the handle, when lowered, fits
firmly into the open-position slot.
Then move the handle to the switch-closed
position. Verify that all play in the operating-pipe
linkage has been taken up before the handle can
be lowered into the closed-position slot and,
further, that substantial pressure is required
to force the handle into the closed-position
slot. Attainment of this “windup” tension in the
operating linkage is essential to ensure positive
switch closure.
Step 15
Recheck to be sure that all clamp bolts and
piercing set screws have been torqued to final
tightness.
Installation
Figure 9. Foot bearing assembly and operating-handle assembly.
Foot bearing support plate
Adjustable stop plates

S&C Instruction Sheet 765-500 15
Installation
Figure 10. 14.4-kV Omni-Rupter with Optional Wildlife Protection (Catalog Number Suffix “-W”), Upright Mounting
Configuration.
Base cover
Pole-saddle cover
Base cover
Fiberglass interphase
operating rod
Wildlife disks
Wildlife disks
Wildlife
disks
Installing the Wildlife Protection
Option (Catalog Number Suffix “-W”)
ÇDANGER
De-energize the switch and ground it at all
six terminals before installing the wildlife
protection option.
The wildlife protection option is not
designed to be installed on energized
equipment.
Failure to do so could lead to serious
injury or death.
The wildlife protection option helps prevent
climbing and perching animals from making
phase-to-grounded part contact. See Figure 10.
A typical wildlife protection installation
includes:
• Two base covers (three base covers on
switches with extra mounting-pole clear-
ance.) (Base covers are not included on
switches with insulated bases.)
• Six wildlife disks.
• One pole-saddle cover (not included when
switch with extra mounting-pole clearance
is specified), pre-installed.
• One fiberglass interphase operating rod,
pre-installed.

16 S&C Instruction Sheet 765-500
Installation
NOTICE
S&C recommends installing the wildlife
protection option after the switch is secured
to the utility pole.
Damage to the wildlife option may occur
if lifting slings strain the wildlife disks dur-
ing handling.
In Figure 10 on page 15, a typical installation of
the wildlife protection option is illustrated. The
pole-saddle cover will be pre-installed at the
factory, as will the fiberglass interphase operat-
ing rod. Consult the RD drawing accompanying
the switch installation instructions for details
specific to your switch that may differ from the
instructions below. Following are instructions
for a typical field installation of the wildlife
protection option.
Step 16
Installing the Base Covers:
With the switch in the closed position, place the
base covers onto the steel base of the switch in
the positions shown on the associated RD draw-
ing. If optional surge arrester mounting provi-
sions (Catalog Number Suffix “-A1” or “-A2”)
have been specified for the switch, cutouts will
be provided in the base covers to fit around the
arrester mounting brackets.
Step 17
Hook one end of the spring clip assembly into
the lip on the edge of one side of the base cover.
See Figure 11. Bring the spring clip underneath
the switch base and stretch it until it can be
hooked into the lip on the edge of the opposite
side of the base cover. Make sure the spring clip
is at least one-half inch from the edge of the
base cover. See Figure 12. Install the remaining
spring clips on their respective base covers in
accordance with the supplied RD drawing.
Figure 12. Make sure clips are installed ¹⁄₂-inch from edge of cover.
¹⁄₂-inch from edge
Figure 11. Hook one end of spring clip into base cover lip. Stretch under-
neath base and hook on opposite side.
Base cover
Spring clip
Switch base

S&C Instruction Sheet 765-500 17
Installation
Installing the Wildlife Disks:
Before installing the wildlife disks, determine
the proper placement of the disks on the switch
blade and contact insulators.
On 14.4-kV Omni-Rupter Switches
(Porcelain and Cypoxy® Insulators)
Install the wildlife disk to the bottom skirt root
of the insulator on both the blade and contact
ends of the switch. When the wildlife disks are
properly installed, the disks will overlap slightly
as shown in Figure 13.
On 25-kV Omni-Rupter Switches
(Porcelain and Cypoxy® Insulators)
Blade-end of the switch: Install the wildlife disk
on the bottom skirt root of the insulator.
Contact-end of the switch: Count up two
skirts from the base and install the wildlife disk
to the insulator on the blade-end. When the wild-
life disks are installed properly, they will be at
approximately the same height. See Figure 14.
Figure 14. Wildlife disk placement on 25-kV Omni-Rupter Switches.
Contact-end Blade-end
Bottom
skirt
Disks at same height
Two skirts
from bottom
skirt
Insulator Insulator
Figure 13. Wildlife disk placement on 14.4-kV Omni-Rupter Switches.
Disks overlap
blade-end over
contact-end
Bottom
skirt
Contact-end
Blade-end
Bottom
skirt
Insulator
Insulator

18 S&C Instruction Sheet 765-500
Installation
Step 18
a. To assemble the disks, fit the disk around
the insulator on the blade-end of the switch.
See Figure 15. Then, insert the locking tabs
of one-half of the disk into the open slot on
the other half to create a secure overlapping
fit. Repeat the procedure on the opposite side
of the disk. When the halves are correctly
assembled, the S&C logo will be on top of
the disk on both sides. See Figure 16.
b. Starting with the outside locking tabs first,
squeeze the overlapping sides together until
the tabs audibly snap into place.
c. Push the two halves of the disk together in
towards the insulator so that it fits the insula-
tor as close as possible. See Figure 17. Snap
the upper locking tab firmly into place. Both
tabs should protrude through the open slot
as shown in Figure 16.
d. Repeat a. through c. above to install the wild-
life disks on the insulators on the contact-end
of the switch.
Figure 17. Push disk halves together. Snap upper tab into place. Disk
halves should fit as tight against the insulator as possible.
Push disk halves
Figure 15. Fit the disk halves around the insulator.
Insulator
Figure 16. Snap lower tab into open slot.
Snap tab into
open slot
Upper locking tab
Lower locking tab

S&C Instruction Sheet 765-500 19
Installation
Figure 18. Dead-ending bracket (triangular mounting configuration
shown).
Extension link assemblies
Dead-end brackets
Jumper
Line conductor
Dead-Ending Conductors
Dead-ending provisions are standard on
Omni-Rupter switches that have upright, upright
(extra mounting pole clearance), or triangular,
mounting configurations. When dead-ending to
these brackets, a pole band and extension-link
assembliesare required. See Figure 18.
Maximum dead-end loading for S&C dead-
ending brackets on switches with steel bases:
a. 2000 pounds per conductor where pull-off
forces are applied to only one side of the
switch.
b. 8000 pounds per conductor where equal
pull-of forces are applied to both sides of
the switch.
c. 1500 pounds per conductor for upright
switches with extra mounting pole clear-
ance where pull-off forces are applied to only
one side of the switch.
Maximum dead-end loading for S&C dead-
ending brackets on switches with insulated
bases:
a. 750 pounds or 500 pounds per conductor,
14.4-kV and 25-kV respectively, where pull-
off forces are applied to only one side of the
switch, including upright switches with extra
mounting pole clearance.
b. 8000 pounds per conductor for 14.4-kV and
25-kV switches, where equal pull-off forces
are applied to both sides of the switch.
Connecting High-Voltage
Conductors
ÇDANGER
Conductors must be de-energized and
grounded in accordance with standard
system operating practice.
Failure to do so can result in serious
injury or death.
NOTICE
To avoid overloading the terminal pads, S&C
recommends making the jumper connection
to the line conductor before securing jumper
fasteners to the terminal pad.
A pole band can be specified by adding suffix “-P1”
to the catalog number. Extension-link assemblies can be
provided by adding suffix “-D” to the catalog number of the
switch, or equivalent user-furnished extension means may
be used.

20 S&C Instruction Sheet 765-500
Installation
Step 19
The Omni-Rupter terminal pads are silver plated
and do not require abrasive cleaning as a part
of their preparation. Wipe any dirt or grease
from the surface, and apply a thick coating of
Penetrox A®or other appropriate conductor
preparation compound. DO NOT wire-brush
the terminal pads. Wire brushing may scratch
the plating.
Step 20
When high-voltage conductors are to be con-
nected using aluminum-alloy connectors, the
following procedures should be employed:
a. Thoroughly wire-brush the current-transfer
surfaces of each connector and immediately
apply a liberal coating of Penetrox A (avail-
able from Burndy Corporation) or another
appropriate conductor preparation com-
pound to the brushed surfaces.
b. Prepare the conductors using established
procedures and clamp them in their respec-
tive connectors.
For other types of connector, follow the
manufacturer’s recommended preparation
procedure before connecting to Omni-Rupter
terminal pads.
ÇCAUTION
DO NOT apply excessive load to the termi-
nal pads.
The jumper connections should be in-line
with and level to the terminal pad bolt holes
before securing the jumper fasteners to the
terminal pad. Large pull-off forces may mis-
align the blades with the stationary contacts
or prevent proper closing.
Misaligned contacts may overheat
causing arcing and damage to the
switch. Injury to operating personnel
may result.
Step 21
Attach the jumper connectors to their respec-
tive terminal pads using flexible-conductor
connections. When attaching connectors to
the Omni-Rupter terminal pads, the connectors
should be parallel to the terminal pad. Attach
and form the conductors so that no significant
loading pressure is applied to the terminal pads.
See Figure 19.
a“Mass anode” type connectors, such as the Catalog
Number 5300 series offered by S&C, which have been
designated by the connector manufacturer as being suit-
able for direct attachment to copper alloy terminal pads.
Conductor
Terminal pad
Connector
Figure 19. Connect jumper connector parallel to terminal pad.