S&C Alduti-Rupter User manual

Alduti-Rupter®Switches
Outdoor Distribution (14.4 kV and 25 kV)
Three-Pole Side-Break Heavy-Duty Style
Reciprocating Operating Mechanism
Installation
Table of Contents
Section Page Section Page
Introduction
Qualified Persons ........................... 2
Read this Instruction Sheet ................... 2
Retain this Instruction Sheet. . . . . . . . . . . . . . . . . . . 2
Proper Application .......................... 3
Operating Considerations..................... 4
Warranty .................................. 4
Warranty Qualifications ...................... 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 .................................. 9
Installation
Operating Pipe Preparation ...................10
Mounting to Wood...........................10
Uncrating the Switch.........................10
Attaching Couplings to Switch Poles ............10
Attaching the Bell-Crank Assembly .............11
Attaching Couplings
to the Bell-Crank Assembly .................11
Lifting the Switch ...........................11
Installing Pipe Couplings
with Piercing Set Screws ...................13
Installing the Interphase Pipe ..................13
Installing the Vertical Operating Pipe ............14
Installing the Operating Handle ................15
Checking Alignment .........................17
Installing the Key Interlock ....................18
Checking Operation .........................19
Connecting the High-Voltage Conductors ....... 23
Operation
Opening and Closing the Switch .............. 24
December 6, 2021
© S&C Electric Company 1953-2021, all rights reserved Instruction Sheet 761-545

2 S&C Instruction Sheet 761-545
Introduction
Qualified
Persons WARNING
Only qualified persons who are knowledgeable in the installation, operation, and maintenance
of overhead and underground electric distribution equipment, along with all associated hazards,
may install, operate, and maintain the equipment covered by this publication. A qualified person
is someone 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 voltages to which the qualified person will be exposed
• The proper use of special precautionary techniques, personal protective equipment, insulated
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.
Read this
Instruction
Sheet
NOTICE
Thoroughly and carefully read this instruction sheet and all materials included in the product’s
S&C Instruction Handbook before installing or operating your Alduti-Rupter Switch. Familiarize
yourself with the Safety Information and Safety Precautions on pages 5 through 7. The latest
version of this publication is available online in PDF format at sandc.com/en/support/
product-literature/.
Retain this
Instruction
Sheet
This instruction sheet is a permanent part of your Alduti-Rupter Switch. Designate a location where
you can easily retrieve and refer to this publication.

S&C Instruction Sheet 761-545 3
Introduction
Figure 1. Switch nameplates with ratings.
Nameplate on switch base Nameplate on operating handle
S&C
ALDUTI-RUPTER®SWITCH
Outdoor Distribution
S&C
ALDUTI-RUPTER®SWITCH
Outdoor Distribution
AMPERES, INTERRUPTING -
WHEN SWITCHING:
PARALLEL
CIRCUITS
LOAD ▲
RESTR.TO
APPL. CLASSES ◆
C AT.
NO.
KV, NOMINAL -
MAX DES, - BIL
AMPERES
CONTINUOUS
AMPERES, RMS
ASYM. MOMENTARY
CABLE OR
CAPACITORS
◆
CATALOG
NUMBER
KILOVOLTS
AMPERES
▲And associated magnetizing currents.
◆ See S&C Descriptive Bulletin 761-31.
TORONTO, ONTARIO M9W 1G4
MADE IN CANADAGTB-324R21
MADE IN CANADAGTB-2907R11
S&C ELECTRIC CANADA LTD.
TORONTO, ONTARIO M9W 1G4
S&C ELECTRIC CANADA LTD.
Proper
Application WARNING
The equipment in this publication is only intended for a specific application. The application must
be within the ratings furnished for the equipment. Ratings and other application information can
be found in Specification Bulletin 761-31.
In most applications, Alduti-Rupter Switches are capable of switching rated continuous load currents
at full voltage. The ratings for the particular switch are listed on nameplates attached to the operating
handle and the switch. See Figure 1.

4 S&C Instruction Sheet 761-545
Introduction
These interrupter switches are not intended for breaking fault currents.
Operating
Considerations
Circuit-making and circuit-breaking are involved in the normal operation of these
interrupter switches, and partial or precautionary opening or closing of the switch should
not be attempted. If the switch is covered in ice or snow, do not “chop” the switch between
the Open and Closed positions to dislodge the ice.
To operate the switch, swing the handle through its full stroke without hesitation. Do
not assume the operating handle position indicates the Open and Closed positions of
the interrupter switch blades. After opening or closing the switch, always make a visual
check of the blade position to determine the switch blades are in the intended position.
Then, tag or padlock the operating handle in accordance with standard system operating
practices. In all cases, make sure the operating handle is locked before “walking away”
from the switch.
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, “Standard
Conditions of Sale–Immediate Purchasers Outside the United States”), plus any special
warranty provisions, as set forth in the applicable product-line specication bulletin,
are exclusive. The remedies provided in the former for breach of these warranties shall
constitute the immediate purchaser’s or end user’s exclusive remedy and a fulllment of
the seller’s entire liability. In no event shall the seller’s liability to the immediate purchaser
or end user exceed the price of the specic product that gives rise to the immediate pur-
chaser’s or end user’s claim. All other warranties, whether express or implied or arising
by operation of law, course of dealing, usage of trade or otherwise, are excluded. The
only warranties are those stated in Price Sheet 150 (or Price Sheet 153), and THERE
ARE NO EXPRESS OR IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE. ANY EXPRESS WARRANTY OR OTHER OBLIGATION
PROVIDED IN PRICE SHEET 150 (OR PRICE SHEET 153) IS GRANTED ONLY TO THE
IMMEDIATE PURCHASER AND END USER, AS DEFINED THEREIN. OTHER THAN AN
END USER, NO REMOTE PURCHASER MAY RELY ON ANY AFFIRMATION OF FACT OR
PROMISE THAT RELATES TO THE GOODS DESCRIBED HEREIN, ANY DESCRIPTION
THAT RELATES TO THE GOODS, OR ANY REMEDIAL PROMISE INCLUDED IN PRICE
SHEET 150 (or PRICE SHEET 153.)
Warranty
Qualifications
The standard warranty is applicable to the Alduti-Rupter Switch detailed in this
instruction sheet except when it is power operated using a switch operator of other than
S&C manufacture.

S&C Instruction Sheet 761-545 5
Safety Information
Understanding
Safety-Alert
Messages
Several types of safety-alert messages may appear throughout this instruction sheet and
on labels and tags attached to the Alduti-Rupter Switch. Familiarize yourself with these
types of messages and the importance of these various signal words:
DANGER
“DANGER” identifies the most serious and immediate hazards that will likely
result in serious personal injury or death if instructions, including recommended
precautions, are not followed.
WARNING
“WARNING” identifies hazards or unsafe practices that can result in serious
personal injury or death if instructions, including recommended precautions, are
not followed.
CAUTION
“CAUTION” identifies hazards or unsafe practices that can result in minor personal
injury if instructions, including recommended precautions, are not followed.
NOTICE
“NOTICE” identifies important 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 sheet and need assistance, contact
your nearest S&C Sales Ofce or S&C Authorized Distributor. Their telephone numbers
are listed on S&C’s website sandc.com, or call the S&C Global Support and Monitoring
Center at 1-888-762-1100.
NOTICE
Read this instruction sheet thoroughly and carefully
before installing the Alduti-Rupter Switch.
Replacement
Instructions
and Labels
If additional copies of this instruction sheet are needed, contact your nearest S&C Sales
Ofce, 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.

6 S&C Instruction Sheet 761-545
Reorder Information for Safety Labels
Location Safety Alert Message Description Part Number
ADANGER Electrocution Hazard G-6580
BWARNING Piercing Set Screws G-3176R1●
CWARNING Handle Operation G-4400R5
DWARNING Electrocution Hazard—Grounding Strap G-6596●
● This part is a tag to be removed and discarded after the switch is installed and adjusted.
Location of Safety Labels
C
B
D
A
Safety Information

S&C Instruction Sheet 761-545 7
DANGER
Alduti-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 the “Qualified Persons” section on page 2.
2. SAFETY PROCEDURES. Always follow safe
operating 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,”
“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, and grounded.
6. LOAD-INTERRUPTER SWITCH POSITION.
Always confirm the Open/Close position of load-
interrupter switchesbyvisually 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 circuit-breaking
are 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.
Safety Information

8 S&C Instruction Sheet 761-545
Shipping and Handling
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 the listed shipping skids, crates, and contain-
ers 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.
Packing
Study the erection drawing carefully and check the bill
of material to make sure all parts are at hand. When a
standard mounting arrangement is specied, the shipment
will include:
• Three switch poles
• Operating-pipe sections for interphase, horizontal con-
necting, and vertical sections●
• Operating-mechanism components, such as rod guides,
bell-crank assembly, operating handle assembly, etc.—
each tagged and keyed to the bill of material for ready
identication
• The erection drawing indicating the standard minor
modifications available for the standard mounting
arrangement
The components included with these modifications are
shown on the erection drawing bill of material under the
specified “-SX” suffix. They include:
-S1 One tubular fiberglass insulating section in vertical
operating shaft
-S2 One Cypoxy™ Insulator unit in vertical operating
shaft
-S3 Insulated interphase sections and one fiberglass
insulating section in vertical shaft
-S4 Insulated interphase sections and one Cypoxy
Insulator unit in a vertical operating shaft
-S6 Key interlock—single lock for “locked-open”
application
-S6L Provision for key interlock—allows future addition
of single lock for “locked-open” application
-S7 Auxiliary contact switch with 4 N/O and 4 N/C
contacts (600 Vac/20 A, 125 Vdc/1 A, 48 Vdc/1 A)
-S8 Provision for power operation of pole-mounted
switches by a Type AS-10 Switch Operator
-S9 Provision for power operation of pedestal mounted
switches by a Type AS-10 Switch Operator
-S16 Provision for power operation by a 6801M Automatic
Switch Operator
“-V1,” or “-V2” adds (one or two respectively) extra
6-foot 10-inch (208-cm) length of pipe and includes the
appropriate number of extra couplings and guides.
Drawing RD-10015, detailing the various modifications,
is included in addition to the erection drawing.
Power Operation: If sufx “-S8” or “-S9” is specied,
S&C Instruction Sheets 769-510 and 769-511, “S&C Switch
Operators—Type AS-10,” are included with the switch
shipment. Instruction Sheets 769-510 and 769-511 cover
installation, operation, and adjustment of the switch
operator and should be used in conjunction with this
instruction sheet where applicable. If suffix “-S16” is
specied, associated S&C Instruction Sheets for the 6801M
Automatic Switch Operator are included with the switch
operator shipment. Not all mounting arrangements are
suitable for power operation; consult the nearest S&C
Sales Ofce for details.
● Not furnished with switches ordered “less operating pipe.”

S&C Instruction Sheet 761-545 9
Shipping and Handling
Handling
The crate the switch pole-units are packed in is designed
to be moved and lifted using a lift truck. Raised slots in
the bottom of the crate are provided for a lift truck’s forks.
Note: To minimize time-consuming final adjustments
after installation, make sure the switch poles are in
their fully Closed position during installation of the
interphase and vertical operating pipe sections. S&C
recommends tying the switch blades to their jaw
contacts with wire or a cable tie.
WARNING
DO NOT lift the switch pole-units by rigging on the
“live parts” or subject these parts to undue stress from
slings or fall lines.
Lifting the switch by the live parts will damage the
switch. Rough handling may cause damage to the
blades and contacts.
Failure to lift the switch properly can result in
switch damage, causing improper operation,
arcing or electrical shock.

10 S&C Instruction Sheet 761-545
Installation
S&C Instruction Sheet 761-545 10
Spring-type
washer
Figure 2. Applying the spring washer.
Figure 3. Assembling the pipe coupling to the operating
lever—interphase pipe on both sides of the operating lever.
Operating lever Pipe coupling
Figure 4. Assembling the pipe coupling to the operating
lever—interphase pipe on one side of the operating lever.
Operating lever
Pipe coupling
Operating Pipe Preparation
If desired, the operating pipes can be cut to length (if not
precut at the factory) before proceeding to the job site.
Cutting dimensions are shown on the erection drawing.
One of the pipe sections furnished is threaded at one end
to accommodate the operating handle assembly.
Users supplying their own operating pipe should deter-
mine which section of operating pipe is to be the lowest and
thread one end of it for installation of the operating handle.
Provide sufficient thread to allow the pipe to extend
approximately ¼-inch (6-mm) below the handle coupling.
Mounting to Wood
When mounting the switch and its operating mechanism to
a wood structure or wood pole, S&C recommends suitably
sized square washers be placed under the nuts. S&C also
recommends using spring-type washers between the
square washers and nuts to compensate for wood shrink-
age and thus maintain fastener tightness. See Figure 2.
Uncrating the Switch
STEP 1. Remove the switch poles and bell-crank base(s)
or bracket(s), if applicable, from their crates and
arrange them on the ground in the same order in
which they will be mounted on the structure.
Protect the bearings from contamination by
dirt, mud, oil, etc. If necessary, use blocks to
keep the bearings clear of the ground.
Attaching Couplings to Switch Poles
NOTICE
An adjustable pipe coupling is included for each
interphase pipe section. Typically, these adjustable
couplings are attached to the center switch pole
except for tiered-upright mounting configurations.
STEP 2. Attach pipe couplings to the operating lever of
each switch pole. Each pipe coupling includes
¼-inch (6-mm) and ⅜-inch (10-mm) spacers.
Position the spacers, included with each
coupling, as shown in the section views on
the erection drawing. See Figures 3 and 4.

S&C Instruction Sheet 761-545 11
Installation
Attaching the Bell-Crank Assembly
STEP 3. Attach the bell-crank assembly to its base or
bracket (pole-mounted arrangements only). See
Figure 5.
Attaching Couplings to the Bell-Crank
Assembly
STEP 4. If a bell-crank assembly is mounted between
switch poles, the bell crank will be connected to
the interphase pipe by a drag-link pipe section
and an offset coupling. Attach one end of the
drag-link pipe section to the driven arm of the
bell crank. Then, attach the specied offset
coupling to the other end of the drag-link pipe
section. See Figure 6.
Lifting the Switch
NOTICE
Do not lift the switch poles by rigging on the “live
parts” or subject these parts to undue stress from
slings or fall lines. Misalignment of the contacts and
the interrupters may result.
STEP 5. Hoist the individual switch poles and bolt them
into position on the pole or structure as shown
on the erection drawing. See Figure 7.
NOTICE
Make sure the surfaces on which the switch
pole bases are mounted are flat and true.
Mounting to an uneven surface can cause
the bases to twist, placing undue strain on
the insulators and throwing the blades out of
alignment, resulting in difficulties operating
the switch. Use shims as required.
Figure 5. Attaching the bell-crank assembly.
Figure 6. Typical outboard bearing configuration,
vertically mounted between switch poles.
Offset coupling
Drag link
Driven arm
of bell-crank
Figure 7. Hoisting the switch pole into position.

12 S&C Instruction Sheet 761-545
Installation
STEP 6. Hoist the bell-crank assembly, including base or
bracket, and bolt it into position as shown on the
erection drawing. See Figure 8.
STEP 7. To minimize time-consuming nal adjustments
make sure the switch is fully closed. Tie the
switch blades to their stationary main contacts.
See Figure 9.
STEP 8. Make sure the bell-crank is held in the 45-degree
position. The bell-crank and bell-crank bearing
have indexing ridges to facilitate alignment.
See Figure 10.
Figure 8. Hoisting the bell-crank into position.
Tie
Figure 9. Tieing the switch blade to the main contacts.
Figure 10. A bell-crank in the 45-degree position.
45-degree
position
marks

S&C Instruction Sheet 761-545 13
Installation
Installing Pipe Couplings with Piercing Set
Screws
WARNING
Failure to properly install pipe couplings with piercing
set screws can cause slippage of operating pipe,
resulting in improper operation of the switch, arcing,
equipment damage, or electrical shock.
STEP 9. To properly install piercing set screws:
(a) Make sure the cutting tip of the piercing set
screw does not protrude through the body of
the clamp.
(b) Insert the operating pipe section into the
coupling and nger-tighten the clamp bolt(s).
(c) Adjust the operating pipe to the correct
length. Then, tighten the clamp bolt(s) to
nal tightness.
(d) Tighten the piercing set screw, piercing the
pipe, and continue turning until a rm
resistance is felt.
(e) Make sure the clamp bolt(s) are tight. See
Figure 11.
Installing the Interphase Pipe
STEP 10. Install the horizontal pipe sections connecting
the switch poles and the bell-crank assembly.
See Figure 12. Follow the directions in the
“Installing Pipe Couplings with Piercing Set
Screws” section.
Torque the clamp bolt of each pipe-coupling
clamp to final tightness, but do not tighten the
associated set screw until the mechanism has
been adjusted to attain full closure of all three
poles.
STEP 11. Make sure the bell-crank is held in the 45-degree
position. The bell-crank and bell-crank bearing
have indexing ridges to facilitate this alignment.
See Figure 10 on page 12.
NOTICE
The bell-crank arms should be within 5 degrees
of the 45-degree position for the most favorable
mechanical advantage when the switch is in
both the Open and Closed positions.
Figure 12. Pipe connecting the switch poles.
Interphase pipe sections
Figure 11. Installing the pipe couplings.
Piercing set screw in the shipping position (cutting
tip does not protrude through the body of the clamp)
Operating pipe installed, clamp bolt fully tightened, and
piercing set screw in final position
Clamp bolt
Clamp
Coupling body
Piercing
set screw
Slug pierced
from pipe

14 S&C Instruction Sheet 761-545
Installation
STEP 12. If the bell-crank assembly is mounted
outboard of the switch poles: Install the pipe
section connecting the driven arm of the bell-
crank to the nearest switch pole. See Figure 13.
Follow the directions in the “Installing Pipe
Couplings with Piercing Set Screws” section on
page 13.
Torque the clamp bolt of each pipe-coupling
clamp to final tightness, and continue turning
until a firm resistance is felt.
If the bell-crank assembly is mounted
between switch poles: Connect the drag link
to the interphase pipe using the offset coupling
previously attached to the drag link in Step 4
on page 11. See Figure 14. Follow the direction
in the “Installing Pipe Couplings with Piercing
Set Screws” section on page 13.
Torque the clamp bolt of each pipe-coupling
clamp to final tightness, and continue turning
until a firm resistance is felt.
Installing the Vertical Operating Pipe
S&C recommends making up each coupling connection as
work progresses from the top down.
STEP 13. One of the pipe sections furnished is threaded at
one end to accommodate the operating-handle
assembly. See Figure 15. Install this section of
pipe last, with the threads at the lower end.
If only one vertical operating-pipe section is
required, proceed to Step 16 on page 15.
Note: Do not tighten the piercing set screw
at the top of the lowest section of vertical
operating pipe until satisfactory operating-
handle adjustment is attained.
Driven arm of
bell-crank
Connecting
pipe
Figure 13. Pipe connecting the bell-crank.
Figure 15. A threaded vertical operating pipe.
Interphase pipe
Drag link
Figure 14. Connecting the drag link to the interphase pipe.

S&C Instruction Sheet 761-545 15
Installation
STEP 14. Mount the rod guide(s) with the arm upward on
the pole or structure in accordance with the
dimension shown on the erection drawing. See
Figure 16. A positioning stud is furnished which
holds the rod guide arm at 45 degrees. When an
adjustable rod guide is included (for the tiered-
outboard switch mounting conguration only),
it should be mounted nearest the switch.
STEP 15. Install the upper section of operating pipe
between the bell crank and the uppermost rod
guide with the rod guide arm pointing upward
at a 45-degree angle. See Figure 17. Follow the
directions in “Installing Pipe Couplings with
Piercing Set Screws” section on page 13.
If more than one rod guide is used, install
vertical operating-pipe sections between the
rod guides in the same manner.
Installing the Operating Handle●
STEP 16. Mount the operating handle as shown on the
erection drawing. At the same time, use one of
the operating handle mounting bolts to attach
one end of the grounding strap (the end with the
grounding connector attached) to the handle
mounting plate. See Figure 18.■
● If suffix “-S8” or “-S9” is specified, refer instead to S&C Instruction
Sheet 769-510, “S&C Switch Operators - Type AS-10.” If suffix “-S16” is
specified, refer instead to S&C Instruction Sheet 1045M-510, “6801M
Automatic Switch Operators, Reciprocating and Rotating Switch Opera-
tion: Installation.”
■ The grounding recommendations described in this document may
differ from the standard operating and safety procedures of certain
electric utility companies. Where a discrepancy exists, the operating
procedures of the electric utility apply.
Figure 16. Attaching the rod guide.
Figure 17. Installing the upper operating pipe section into
the rod guide.
Positioning
stud
Uppermost
section of
vertical
operating
pipe
Figure 18. Mounting the operating handle.
Grounding
strap

16 S&C Instruction Sheet 761-545
Installation
S&C Instruction Sheet 761-545 16
STEP 17. Install the lowest vertical operating-pipe
section by threading one end of the pipe into the
couplingontheoperatinghandle.Approximately
¼-inch (6 mm) of thread should extend through
the coupling. Tighten the locknut. See Figure 19.
STEP 18. Insert the upper end of this pipe section in the
lowest rod-guide coupling (or, if only one
vertical pipe section is used, the bell-crank
coupling) and, while holding the operating
handle at a point approximately 20 degrees from
the Closed position, tighten the rod-guide (or
bell-crank) clamp bolt. See Figure 20.
NOTICE
Do not tighten the piercing set screw at the
top of the lowest section of vertical operating
pipe until satisfactory operating-handle
adjustment is attained.
STEP 19. Fasten the free end of the grounding strap to the
lowest vertical operating-pipe section a few
inches above the operating-handle assembly
with the U-bolt connector provided for this
purpose. See Figure 21. Then, connect the lower
end of the strap to a suitable earth ground, using
the grounding connector provided at that end of
the strap .●
● If suffix “-S8” or “-S9” is specified, refer instead to S&C Instruction
Sheet 769-510, “S&C Switch Operators - Type AS-10.” If suffix “-S16” is
specified, refer instead to S&C Instruction Sheet 1045M-510, “6801M
Automatic Switch Operators, Reciprocating and Rotating Switch Opera-
tion: Installation.”
Figure 19. Installing the lowest operating pipe section into
the operating handle assembly.
Locknut
Figure 20. Installing the lowest operating pipe section into
the rod guide.
Lowest section of the
vertical operating pipe
Figure 21. Attaching the grounding strap.
Grounding
strap U-bolt
connector

S&C Instruction Sheet 761-545 17
Installation
Checking Alignment
STEP 20. Remove the ties holding the switch blades to
their stationary main contact assemblies. See
Figure 22.
STEP 21. Remove the 45-degree positioning stud from
each rod guide. See Figure 17 on page 15.
STEP 22. Open and close the switch slowly to ensure no
operational difculties are encountered due to
undetected damage in shipping.
WARNING
Open and close the switch slowly ONLY
when checking alignment or making
adjustments to the de-energized switch.
When opening or closing an energized
switch, swing the operating handle
vigorously through its full travel without
hesitation at any point.
Failure to operate the switch properly can
result in arcing, switch damage, serious
injury, or death.
STEP 23. Move the operating handle slowly to the Closed
position. See Figure 23. A denite resistance
should be felt at the end of the stroke, indicating
all slack in the operating linkage has been taken
up.
STEP 24. If there is still slack, repeat the procedure in
Step 18 but move the operating handle more
than 20 degrees in the opening direction before
torquing the clamp bolt on the lowest rod guide
(or bell-crank) coupling. See Figure 24.
Conversely, if considerable force is needed
to move the handle to the fully Closed position,
or if the handle does not swing 180 degrees to
the fully Open position, loosen the clamp bolt
on the lowest rod guide (or bell-crank) coupling
and move the handle to a position less than
20 degrees from the Closed position. Then
torque the clamp bolt on the lowest rod guide (or
bell-crank) coupling. Proper “resistance” in the
operating linkage is essential to ensure positive
switch closure.
Figure 22. Removing the tie at the stationary main contact
assembly.
Figure 23. Verifying the stack has been taken up in the
operating linkage.
Tie
Figure 24. Torquing the clamp bolt at the lowest rod guide
(or bell-crank) coupling.
Clamp bolt

18 S&C Instruction Sheet 761-545
Installation
If a key interlock is used (standard minor
modification suffix “-S6” or “-S6L”), proceed
to Step 25. Otherwise, proceed to Step 27 on
page 19.
Installing the Key Interlock
STEP 25. The interlock group includes a Superior Type
B4003-1 Mk II single- or multiple-key interlock
(or equivalent), with zero bolt projection and
¾-inch (19 mm) bolt travel, locking disc, and
interlock bracket. If “provision only” is
specied, the interlock is not included.
Attach the key interlock to the interlock
bracket so the interlock bolt, when extended,
engages a slot in the locking disc on the
operating handle. See Figure 25.
STEP 26. Block one of the two slots in the locking disc
with the blocking screw provided. (The slot to
be blocked depends on whether a locked-open
or locked-closed arrangement is required.) See
Figure 26.
NOTICE
Key interlocks are intended for proper
sequencing of switch operations; they are not
intended to provide security. The operating
handle assembly includes a locking bar for
padlocking the switch in either the Open or
Closed position.
Figure 25. Attaching the key interlock to the interlock
bracket.
Interlock bolt
Blocking screw
Figure 26. The blocking screw in the interlock disc.
Locking disc

S&C Instruction Sheet 761-545 19
Installation
Checking Operation
STEP 27. Open and close the switch slowly through its
full travel.
WARNING
Open and close the switch slowly ONLY
when checking alignment or making
adjustments to the de-energized switch.
When opening or closing an energized
switch, swing the operating handle
vigorously through its full travel without
hesitation at any point.
Failure to operate the switch properly can
result in arcing, switch damage, serious
injury, or death.
Make sure the following conditions exist:
(a) With the operating handle as far as it will go
in the closing direction, all main contacts of
the interrupter switch are fully closed with
the blades against their blade stops. See
Figure 27.
(b) Each switch-pole operating lever should lie
against its closed stop. See Figure 28.
Figure 27. Checking that the main contacts are fully closed.
Blade stop
Blade
Main
contacts
fully
closed
Switch-pole
operating lever
Stop bolt
Figure 28. Verifying the switch-pole operating lever is within
 -inch (2 mm) of the closed stop bolt.

20 S&C Instruction Sheet 761-545
Installation
If none of the switch poles are fully closed,
the effective length of the vertical operating
pipe may need to be increased. Loosen the
vertical operating-pipe clamp bolt on the lowest
rod-guide (or bell-crank) coupling. See Figure
29. Move the operating handle approximately
20 degrees from the Closed position and then
torque the rod-guide (or bell-crank) coupling
clamp bolt. Then, move the operating handle
to the fully Closed position and recheck for
adherence to the conditions described above.
In the unlikely event that only one or two
switch poles are fully closed, loosen the clamp
bolt(s) on the interphase pipe coupling(s) at
the affected switch-pole operating lever and
reposition the pipe coupling to increase or
decrease the effective length of the interphase
operating pipe. Torque the clamp bolt of each
pipe-coupling clamp to final tightness. Tighten
the associated piercing set screws, piercing the
pipe, and continue turning until a firm resis-
tance is felt. See Figure 30.
(c) With the operating handle as far as it will go in
the opening direction, the switch blades are
90 degrees from the Closed position. See
Figure 31.
In the unlikely event the above-described
condition is not met, more switch blade travel
is required. Move the operating handle to its
mid position to take the strain off the operating-
pipe linkage. Secure the handle in that position
by inserting a ⅜-inch bolt or metal pin into the
hole provided.
Figure 29. Increasing the effective length of vertical
operating pipe.
Clamp bolt
Lowest section
of vertical
operating pipe
Pipe couplings
Figure 30. Readjusting the interphase pipe.
Clamp bolt
Figure 31. Checking the switch blades are 90 degrees from
the Closed position.
90°