S&C CS-1A User manual

S&C Type CS-1A Switch Operator★
Outdoor Transmission
November 13, 2023
© S&C Electric Company 1975-2023, all rights reserved Instruction Sheet 719-500
Installation
Table of Contents
Introduction � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 2
Qualified Persons � � � � � � � � � � � � � � � � � � � � � � � � � � � 2
Read this Instruction Sheet � � � � � � � � � � � � � � � � � � � 2
Retain this Instruction Sheet� � � � � � � � � � � � � � � � � � � 2
Proper Application � � � � � � � � � � � � � � � � � � � � � � � � � � 2
Warranty � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 2
Safety Information� � � � � � � � � � � � � � � � � � � � � � � � 3
Understanding Safety-Alert Messages� � � � � � � � � � � 3
Following Safety Instructions � � � � � � � � � � � � � � � � � � 3
Replacement Instructions andLabels � � � � � � � � � � � 3
Location of Safety Labels � � � � � � � � � � � � � � � � � � � � � 4
Safety Precautions � � � � � � � � � � � � � � � � � � � � � � � 5
Shipping and Handling � � � � � � � � � � � � � � � � � � � � 6
Inspection � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6
Packing � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6
Storage � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6
Handling � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6
Installation � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 7
Before Starting � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 7
Connecting the Switch Operator to the Circuit-
Switcher Vertical Operating Shaft � � � � � � � � � � � �10
Making Conduit Connections and Connecting
External Control-Circuit Wiring � � � � � � � � � � � � � �11
Using the Manual Operating Handle � � � � � � � � � � � �12
Using the Selector Handle (Coupling and
Decoupling) � � � � � � � � � � � � � � � � � � � � � � � � � � � � �14
Adjusting the Switch Operator� � � � � � � � � � � � � 16
Adjusting Position Indicator and Cranking Direction 16
Adjusting the Travel-Limit Discs � � � � � � � � � � � � � � � �19
Adjusting the Auxiliary Switches� � � � � � � � � � � � � � � 22
About the Extra Auxiliary Switches � � � � � � � � � � � � 23
★For use with the Mark V Circuit-Switcher

2 S&C Instruction Sheet 719-500
WARNING
Only qualified persons who are knowledgeable in the installation, operation, and maintenance
of overhead and underground electric distribution and transmission 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�
NOTICE
Thoroughly and carefully read this instruction sheet and all materials included in the product’s
instruction handbook before installing or operating the Type CS-1A Switch Operator� Become
familiar with the Safety Information and Safety Precautions on pages 3 through 5� The latest
version of this publication is available online in PDF format at https://www�sandc�com/en/
contact-us/product-literature/�
This instruction sheet is a permanent part of the Type CS-1A Switch Operator. Designate a location
where users can easily retrieve and refer to this publication.
WARNING
The equipment in this publication is only intended for power operation of the Mark V Circuit-
Switcher� The application must be within the ratings furnished for the equipment� Ratings and
application information for the Type CS-1A Switch Operator are listed in the ratings table in
Specification Bulletin 719-31� The ratings are also on the nameplate affixed to the product�
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 purchaser’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).
Qualified
Persons
Read this
Instruction
Sheet
Retain this
Instruction
Sheet
Proper
Application
Warranty
Introduction

S&C Instruction Sheet 719-500 3
Several types of safety-alert messages may appear throughout this instruction sheet and on
labels and tags attached to the Type CS-1A Switch Operator. Become familiar 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�
If any portion of this instruction sheet is unclear and assistance is needed, contact the 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 Type CS-1A Switch Operator�
If additional copies of this instruction sheet are required, contact the 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 the nearest S&C Sales Office, S&C
Authorized Distributor, S&C Headquarters, or S&C Electric Canada Ltd.
Understanding
Safety-Alert
Messages
Following
Safety
Instructions
Replacement
Instructions
andLabels
Safety Information

Safety Information
Reorder Information for Safety Labels
Location Safety Alert Message Description Part Number
ACAUTION Use pushbuttons to open or close the Circuit-Switcher���� G-4527R3
BNOTICE The S&C Instruction Sheet is a permanent part of your S&C Equipment���� G-3733R2
CNOTICE Auxiliary switch cams are individually adjustable� Check the auxiliary switch cams��� G- 4746R2
DNOTICE This contactor or relay has been blocked to prevent damage during shipment� G-3684●
● One removable label per contactor or relay� Remove before operation�
4 S&C Instruction Sheet 719-500
A
D
C
B
Location of Safety Labels

S&C Instruction Sheet 719-500 5
DANGER
Mark V Circuit-Switchers 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, follow your company’s operating procedures and rules�
1� QUALIFIED PERSONS� Access to Mark V Circuit-
Switchers 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� Do not remove or obscure any of
the “DANGER,” “WARNING,” “CAUTION,” or
“NOTICE” labels�
5� OPERATING MECHANISM AND BASE� Mark V
Circuit-Switchers contain fast-moving parts that
can severely injure fingers� Do not remove or
disassemble operating mechanisms or remove
access panels unless directed by S&C Electric
Company�
6� ENERGIZED COMPONENTS� Always consider all
parts of the circuit-switcher live until de-energized,
tested, and grounded� Voltage levels can be as high
as the peak line-to-ground voltage last applied to
the unit� Units that have been energized or installed
near energized lines should be considered live until
tested and grounded�
7� GROUNDING� The Mark V Circuit-Switcher must
be connected to a suitable earth ground at the base
of the utility pole, or to a suitable building ground
for testing, before energizing the switch and at all
times when energized� The vertical operating shaft
above the Type CS-1A Switch Operator must also
be connected to a suitable earth ground�
The ground wire(s) must be bonded to the system
neutral, if present� If the system neutral is not
present, proper precautions must be taken to ensure
the local earth ground, or building ground, cannot
be severed or removed�
8� SWITCH POSITION� Always confirm the Open/
Close position of each switch�
• Switches and terminal pads may be energized
from either side�
• Switches and terminal pads may be energized
with the switches in any position�
9� MAINTAINING PROPER CLEARANCE� Always
maintain proper clearance from energized
components�
Safety Precautions

6 S&C Instruction Sheet 719-500
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 all listed shipping skids, crates, cartons, and
containers 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 damaged 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 or damage.
Packing
An S&C erection drawing is stored in a water-resistant
envelope attached to the interrupter container on one of
the three circuit-switcher pole-units. If the Mark V Circuit-
Switcher has had a Type CS-1A Switch Operator specied
for the installation, the operator drawings will be included
in the main drawing envelope. Study the erection drawing
carefully and check the bill of material to make sure all
parts are at hand.
Storage
NOTICE
Connect control power to the switch operator when
storing it outdoors� The Type CS-1A Switch Operator is
equipped with a space heater that must be energized
during storage to prevent condensation and corrosion
within the operator enclosure�
If the switch operator must be stored before installation,
keep it in a clean, dry, corrosion-free area to protect it from
damage. Make sure the crating rests rmly on the ground
and is reasonably level. Shoring under the crate may be
necessary if the ground is uneven. If storing outdoors,
connect control power to the space heater inside the switch
operator per the wiring diagram furnished.
Handling
Lift the Type CS-1A Switch Operator with a lifting sling
looped around the switch operator output shaft. See
Figure1.
Figure 1� Lifting the switch operator�

S&C Instruction Sheet 719-500 7
Installation
Before Starting
The Type CS-1A Switch Operator is a high-speed operator
expressly designed for power operation of the MarkVCircuit-
Switcher. Use Table 1 to identify the associated wiring
diagram that should be consulted for the model of switch
operator being installed. Check the catalog number on the
switch operator to see that it is the correct operator for
the installation before starting the installation. Become
familiar with the parts of the switch operator as shown in
Figures 2 and 3 on pages 8 and 9 and Figure 4 on page 10.
Table 1� Switch Operators—Type CS-1A
Application
Motor and
Control
Voltage
Maximum
Operating
Time,
Seconds①
Minimum
Locked-Rotor
Torque at Rated
Control Voltage,
Inch-Lbs�
Accelerating
Current,
Amperes
Catalog
Number
Schematic
Wiring
Diagram
Drawing
Number
High-Voltage
Device
Style and Rating of
High-Voltage Device
Mark V
Circuit-
Switcher
without shunt
trip device
Integer,34�5 kV thru
69 kV
Vertical-Break,34�5 kV
thru 161 kV
Center-Break,230 and
345 kV, 3 gaps
48 Vdc
1�5
21 500 80 38845R4-A CDR - 3112R 2
125 Vdc 21 500 30 38845R4-B CDR-3112 R2
115 V 60 Hz 18 000 46 38845R4-D CDR-3123R2
Mark V
Circuit-
Switcher with
shunt-trip
device
Integer,34�5 kV thru
69 kV
Vertical-Break,34�5 kV
thru 161 kV
Center-Break, 230 and
345 kV,3 gaps
48 Vdc 21 500
21 500 80 38846R5-AHP CDR-3183
125 Vdc 21 500
21 500 30 38846R5-B●CDR-3184●
①Based on minimum battery and external control wire size require-
ments specified in S&C Data Bulletin 719-60; operating time will be less
if a larger than minimum battery size and/or external control wire size is
used�
● Catalog number 38858R1-B is used for applications where the cir-
cuit-switcher is to be used in conjunction with an S&C Automatic Control
Device unless the switch operator is ordered with the optional shunt-
trip contactor and time-delay relay accessory, catalog number suffix
“-HP�” In this instance, catalog number 38846R5-BHP will be specified�
CDR-3183 is used for catalog number 38846R5-BHP� CDR-3195 is
used for catalog number 38858R1-B�
WARNING
Unauthorized changes should not be made to the wiring
of the Type CS-1A Switch Operator� Should a control-
circuit revision appear desirable, it should be made
ONLY on the authority of a revised wiring diagram that
has been approved by both the user and S&C Electric
Company� Unauthorized changes may make the function
of the operator unpredictable, causing damage to the
operator, associated Mark V Circuit-Switcher, and
possible serious personal injury�

8 S&C Instruction Sheet 719-500
Installation
Attachment bolt
Flexible coupling
plate
Coupling flange
Self-locking nut
Vertical shaft
Clamp bolts
Piercing set
screws
Flexible coupling Circuit-switcher
position indicator
Switch operator
output shaft
Pushbutton protec-
tive cover
Alignment arrow
Manual operating
handle
Latch knob
Selector
handle
Door handle
Figure 2� An external view of a Type CS-1A Switch Operator with the door closed�

S&C Instruction Sheet 719-500 9
Installation
Key interlock with switch
(catalog number suffix “-L”)
Operation counter
Position indexing
drums
Arrow plate
Travel limit switch
including travel-
limit discs
Auxiliary switch,
8-PST
Motor contactor,
opening
Motor contactor,
closing
Conduit entrance
plate
Extra auxiliary switch, 8-PST (catalog
number suffix “-W”); 12-PST version
(catalog number suffix “-Z”) is similar
Motor circuit
fuseholder
Duplex receptacle and
lampholder with switch
Filter holder
Instruction book
holder
Space heater
Space heater fuseholder
Shunt-trip
fuseholder
Door gasket
Figure 3� An interior view of a Type CS-1A Switch Operator with the door open�

10 S&C Instruction Sheet 719-500
Installation
Connecting the Switch Operator to the
Circuit-Switcher Vertical Operating Shaft
Complete the following steps to connect the switch operator
to the vertical operating shaft on the circuit-switcher:
STEP 1� Lift the switch operator as shown in the
“Handling” section on page 6. Then, mount the
switch operator to the structure as indicated on
the erection drawing.
STEP 2� Attach a exible coupling to the output shaft of
the switch operator. See Figure 2 on page 8 and
Figure 4. Thread the attachment bolts through
the flexible coupling plate and through the
coupling ange on the output shaft. Tighten the
bolts to draw the exible plate ush against the
ange; this will deform the threads in the exible
plate, resulting in a binding, nonslip connection.
Install and tighten the self-locking nuts. Do not
use lockwashers with the attachment bolts.
STEP 3� Remove the clamp bolts and set aside the detach-
able half of the exible coupling.
STEP 4� Make sure the cutting tips of the piercing set
screws do not protrude through the body of the
exible coupling on the switch operator output
shaft and the exible coupling attached to the
shaft extending from the gearbox on the circuit-
switcher pole-unit base.
STEP 5� Install the vertical shaft between the exible
coupling that is attached to the shaft extending
from the gearbox on the circuit-switcher pole-
unit base and the exible coupling attached to the
switch operator output shaft. See Figure 4. At the
gearboxend ofthe vertical shaft, tighten the exible
coupling clamp bolts equally so the clamp
pulls down evenly. Then, tighten the associ-
ated piercing set screws, piercing the shaft, and
continue turning until a rm resistance is felt.
STEP 6� At the switch operator output shaft, replace the
detachable half of the exible coupling, but do
not tighten the clamp bolts or the piercing set
screws at this time.
Gearbox
Removable
half of flexible
coupling
Attachment
bolts
Output shaft
Piercing set
screws
Clamp bolts
Flexible
coupling
Vertical shaft
Figure 4� The connection between the circuit-switcher gearbox and the Type CS-1A Switch Operator�

S&C Instruction Sheet 719-500 11
Installation
Making Conduit Connections and Connecting
External Control-Circuit Wiring
NOTICE
To avoid accidental energizing of the operator after the
external connections have been completed, remove
the two-pole pull-out fuseholders for the motor, space-
heater, and (if applicable) shunt-trip circuits� See Figure 3
on page 9� Reinsert the fuseholders only when indicated
in the steps which follow�
STEP 1� Mark the conduit-entrance location for the
control circuit wiring on the conduit-entrance
plate in the bottom of the switch operator enclo-
sure. See Figure 3 on page 9.
STEP 2� Remove the conduit-entrance plate and cut out
the necessary opening. (If the circuit-switcher is
equipped with optional S&C Shunt-Trip Device,
an entrance cutout for an additional one-inch
conduit should also be made at this time.)
STEP 3� Replace the conduit-entrance plate and assemble
the entrance ttings. Apply sealing compound
(provided with each switch operator) when
replacing the conduit entrance plate. Verify the
entrance ttings are properly sealed to prevent
water ingress.
STEP 4� If the circuit-switcher is equipped with the
optional shunt-trip device, install the one-inch-
diameter conduit between adjacent shunt-trip
solenoid housings and between one solenoid
housing and the switch operator. Refer to S&C
Instruction Sheet 711-600.
STEP 5� Remove the blocking labels (G-3684) from the
motor contactors. Connect the external control-
circuit wiring (including space-heater source
leads) to the terminal blocks of the switch
operator in accordance with the wiring diagram
furnished.
NOTICE
Observe recommended minimum wire size requirements
for the control-circuit wiring and the shunt-trip device
wiring where applicable, as shown in S&C Data Bulletin
719-60 and on the switch operator schematic wiring
diagram furnished�

12 S&C Instruction Sheet 719-500
Installation
Figure 5� Manual operation of the operating handle�
Using the Manual Operating Handle
The manual operating handle is used during switch operator
adjustment. Become familiar with the operation of the
manual operating handle, as described on the switch
operator nameplate on the right-hand side of the enclosure.
WARNING
Manual closing of an energized circuit-switcher is not
recommended because of the possibility of closing into
a fault� Manual opening of an energized circuit-switcher
is permissible� When the opening operation has been
initiated, however, it should be completed quickly and
without hesitation� Cranking should continue until the
circuit-switcher is fully open, as indicated by resistance
felt as the circuit-switcher power train progresses to its
stops� As the circuit-switcher moves toward the Open
position, the interrupters will close and the stored-
energy source within the brains will charge and latch�
The circuit-switcher disconnect blades should never
be in the Closed position when the interrupters are
in the Open position� Manual closing of the circuit-
switcher may cause arcing, equipment damage,
and personal injury�
STEP 1� Pull the latch knob on the hub of the manual
operating handle and pivot the handle forward
slightly from its Storage position.
STEP 2� Release the latch knob while continuing to pivot
the handle forward to lock it into the cranking
position. See Figure 2 on page 8 and Figure 5.
(As the handle is pivoted forward and the motor
brake is mechanically released, both leads of
the control source are automatically discon-
nected and both the “opening” and “closing”
motor contactors are mechanically blocked
in the Open position. However, the shunt-trip
device, when this option is provided, remains
operative unless the switch operator is in the
Open position.
STEP 3� Crank the handle in the direction shown on the
arrow plate for the Open position.
If desired, during manual operation the switch
operator may also be disconnected from the
control source by removing the motor-circuit
two-pole pull-out fuseholder located on the right-
hand inside wall of the enclosure. See Figure 3
on page 9. Likewise, the shunt-trip device may be
rendered inoperative by removing the shunt-trip
circuit two-pole pull-out fuseholder located on
the left-hand inside wall of the enclosure.
Latch
knob

S&C Instruction Sheet 719-500 13
Installation
STEP 4� To return the manual operating handle to its
Storage position, pull the latch knob and pivot
the handle approximately 90 degrees. The handle
will then be disengaged from the switch operator
and may be rotated freely in either direction to its
Storage position. Complete the handle storage
by pivoting the operating handle backward
approximately 90 degrees until it latches in the
Storage position.
Note: The manual operating handle may be disengaged
from the switch operator mechanism at any position of the
handle. However, if the switch operator and circuit-switcher
are anywhere between the fully Open and fully Closed
position when the manual operating handle is placed in
the Storage position and the motor circuit fuseholder is
inserted, the switch operator will automatically move to
the Open position (because the switch operator control
circuit is designed to allow an electrical closing only from
the circuit-switcher's fully Open position).
Note: The handle may be padlocked in its Storage position.

14 S&C Instruction Sheet 719-500
Installation
Using the Selector Handle (Coupling and
Decoupling)
The selector handle will be used during switch operator
adjustment. The integral external selector handle, for
operation of the built-in internal decoupling mechanism, is
located on the right-hand side of the switch operator enclo-
sure. Become familiar with the operation of the selector
handle, as described on the switch operator nameplate on
the right-hand side of the enclosure.
To decouple the switch operator from the circuit-
switcher:
STEP 1� Swing the selector handle upright and slowly
rotate it clockwise 50 degrees to the Decoupled
position. See Figure 6. This decouples the switch
operator mechanism from the switch operator
output shaft.
STEP 2� Lower the selector handle to engage the locking
tab. When thus decoupled, the switch operator
may be operated either manually or electrically
without operating the circuit-switcher.
When the selector handle is in the Decoupled
position, the shunt-trip device (when this option
is provided) is rendered inoperative.●Moreover,
in the Decoupled position, the switch opera-
tor’s output shaft is prevented from moving by
a mechanical locking device located within the
switch operator enclosure.
During the intermediate segment of the
selector handle travel, which includes the position
at which actual disengagement (or engagement)
of the internal decoupling mechanism occurs,
the motor-circuit source leads are momen-
tarily disconnected and both the “opening” and
“closing” motor contactors are mechanically
blocked in the Open position. Visual inspec-
tion, through the observation window, will verify
whether the internal decoupling mechanism is in
the Coupled or Decoupled position. See Figure 7
on page 15. The selector handle may be padlocked
in either position.
●Only the shunt-trip device is rendered inoperative� The switch opera-
tor can still be opened through the user’s protective-relay circuit� Thus
“elective” checkout of the system protective scheme is possible at
any time�
Selector handle
Locking
tabs
Figure 6� Selector handle operation (side view)�

S&C Instruction Sheet 719-500 15
Installation
Internal decoupling mecha-
nism (coupled)
Figure 7� The internal decoupling mechanism viewed from the observation window�
Internal decoupling mecha-
nism (decoupled)
To couple the switch operator to the circuit-
switcher:
STEP 1� Manually operate the switch operator to bring
it to the same position (Open or Closed) as the
circuit-switcher. The switch operator position
indicator, seen through the observation window,
will show when the approximate Open or Closed
position has been attained. (The position indi -
cator for the circuit-switcher, located on the
output-shaft collar of the switch operator, will
be aligned later.)
STEP 2� Turn the manual operating handle slowly until
the position indexing drums are numerically
aligned to move the switch operator to the exact
position for coupling. See Figure 7.
STEP 3� Swing the selector handle upright and rotate
it counterclockwise to the Coupled position.
Lower the handle to engage the locking tab. The
selector handle is now in the Coupled position.
Position indexing drums
Switch operator position
indicators

16 S&C Instruction Sheet 719-500
Adjusting the Switch Operator
Adjusting Position Indicator and Cranking
Direction
NOTICE
To avoid accidental energizing of the operator after the
external connections have been completed, remove
the two-pole pull-out fuseholders for the motor, space-
heater, and (if applicable) shunt-trip circuits� See Figure 3
on page 9� Reinsert the fuseholders only when indicated
in the following steps�
Complete the following steps to adjust the position and
cranking direction of the switch operator:
STEP 1� Manually operate the switch operator to bring it to
the same position (fully Open or fully Closed) as
the circuit-switcher. Tighten the exible coupling
clamp bolts equally so the clamp pulls down
evenly. Then, tighten the associated piercing set
screws, piercing the shaft, and continue turning
until a rm resistance is felt. See Figure 8.
STEP 2� With the selector handle in the Coupled position,
crank the circuit-switcher to the fully Open
position and then to the fully Closed position,
and in each position accurately align the mechan-
ical circuit-switcher position indicators on the
output-shaft collar of the switch operator with
the alignment arrow. See Figure 9.
STEP 3� Check the drive-shaft crank of each pole-unit
of the circuit-switcher to determine it is in an
Overtoggle position and against its open or
closed stop at the fully Open or fully Closed
position of the switch operator.
STEP 4� The cranking direction to close the circuit-
switcher is indicated by an arrow plate located
near the hub of the manual operating handle.
See Figure 3 on page 9. This direction has been
predetermined from the erection drawing for
the specic installation and has been factory-
set accordingly. The direction of rotation of the
switch-operator motor has also been set at the
factory.
Verify these rotation directions are correct
as follows:
(a) With the selector handle in the Coupled
position, manually crank the circuit-switcher
to the fully Open position and then to the
fully Closed position. Temporarily mark on
the top of the switch operator enclosure the
direction in which the output shaft rotates
to close the circuit-switcher.
Clamp bolts
Piercing
set screws
Figure 8� Tighten the clamp bolts and piercing set screws�
Output shaft
Position indicator
(open)
Alignment
arrow
Figure 9� Adjust the position indicator� Mark the direction
of operator rotation�

S&C Instruction Sheet 719-500 17
Adjusting the Switch Operator
(b) If the cranking direction required to close
the circuit-switcher is opposite to that
indicated by the arrow plate, remove the
arrow-plate mounting screws and remount
the arrow plate, exposing its opposite side.
(c) With the manual operating handle in its
Storage position and the selector handle
in the Decoupled position, reinsert the
motor-circuit fuseholder. Open the pushbut-
ton protective cover●and operate the switch
operator by means of the externally mounted
OPEN/CLOSE pushbuttons, if provided, or
in their absence, by momentarily jumper-
ing terminals 1 and 8 to open, and 1 and 9
to close.■
Note the direction in which the travel-limit
discs rotate when the switch operator closes.
The direction should agree with the temporary
direction mark previously made on the top of
the enclosure and with the direction displayed
in the cutaway section on the outer ring of the
travel-limit discs. See Figure 10 on page 18.
(The rotation direction of the travel-limit discs
is always the same as the output shaft rotation
direction.
(d) If the direction of the travel-limit disc
rotation noted in Step 4(c) is opposite to
the temporary direction mark previously
made in Step 4(a), a reversal of the motor
direction will be necessary. Remove the
motor-circuit fuseholder to avoid acciden-
tal or remote energization of the control
circuit. Interchange the “S1” and “S2” motor
leads connected to terminals 4 and 5 on
the terminal block in the switch operator
enclosure.
Note: Reversing the motor direction reverses
only the rotation direction of the output shaft
and travel-limit discs. The identity of the opening-
stroke and closing stroke travel-limit discs (to be
adjusted later) will remain unaffected.
(e) In the event that the rotation direction of
the travel-limit discs noted in Step 4(c) is
opposite to the direction displayed in the
cutaway section on the outer ring of the
closing-stroke travel-limit disc, remove the
positioning screws on the outer ring of the
closing-stroke travel-limit disc. See Figure10
on page 18. Rotate the outer ring until the
desired direction is displayed in the cutaway
section. Replace the positioning screws.
(f) Reinsert the motor-circuit fuseholder and
operate the switch operator to the Open
position.
(g) If the output-shaft rotation direction to
open the circuit-switcher is opposite to that
displayed in the cutaway section on the outer
ring of the opening-stroke travel-limit disc,
change the direction displayed as indicated
in Step 4(e).
●For switch operators with optional remote-control blocking switch
(suffix “-Y”), opening the pushbutton protective cover prevents remote
operation of the switch operator�
■Terminal designations may differ in special wiring diagrams� In
such cases, refer to the specific wiring diagram for the correct terminal
designations�

18 S&C Instruction Sheet 719-500
Adjusting the Switch Operator
Table 1� Initial Adjustment of Travel-Limit Discs
Circuit-Switcher
Style
Number of
Interrupter Gaps per
Pole-Unit
Indicator Plate Number
Opening-Stroke Adjustment Closing-Stroke Adjustment
Clockwise to Open Counterclockwise to
Open Clockwise to Close Counterclockwise to Close
Vertical break and
center break
15555
26455
37355
Integer 14655
Handwheel
Handwheel
Adjusting the opening stroke
Adjusting the closing stroke
Indicator plate
(with numbers)
Indicator plate
(with numbers)
Arrow (on
cutaway
section)
Positioning screws
Arrow (on
cutaway
section)
Positioning screws
Figure 10� Adjusting the travel limit discs on the travel limit switch�

S&C Instruction Sheet 719-500 19
Adjusting the Switch Operator
Adjusting the Travel-Limit Discs
The Travel Limit switch (coupled to the motor) that
governs the extent of output-shaft rotation in the opening
and closing directions includes six contacts operated by
cam-actuated rollers. Positioning the cams to properly
engage the rollers is facilitated by the travel-limit discs
(the upper one is the opening stroke travel-limit disc; the
lower one is the closing-stroke travel-limit disc.
Complete the following steps to adjust the travel-limit discs:
STEP 1� Adjustment of the opening-stroke travel-limit
disc (and therefore the associated cams) is
accomplished as follows:
(a) Remove the motor-circuit fuseholder. See
Figure 3 on page 9.
(b) Place the selector handle in the Coupled
position and manually crank the circuit-
switcher to the Open position.
(c) For the circuit-switcher style installed and
its number of interrupting gaps per pole-
unit, determine from Table 1 on page 18 the
indicator plate number to which the open-
ing-stroke travel-limit disc is to be rotated.
Select the indicator plate number from the
“Opening-Stroke Adjustment-Clockwise to
Open” column if the disc and output shaft
rotate in the clockwise direction to open
the circuit-switcher, or from the “Opening-
Stroke Adjustment-Counterclockwise to
Open” column if the disc and output shaft
rotate in the counterclockwise direction to
open the circuit-switcher.
(d) Grasp the handwheel and turn it to the extent
possible in a direction opposite to the direc-
tion the output shaft rotates to open the
circuit-switcher. See Figure 10 on page 18.
(e) With the handwheel held in the position
indicated above, raise the opening-stroke
travel-limit disc approximately 3/16 of an
inch (5 mm) and rotate the disc until the
arrow on its outer ring is in line with the
number on the indicator plate as specied
in Table1. Lower the disc, make sure it is
engaged, and release the handwheel. See
Figure 10 on page 18.
STEP 2� Adjustment of the closing-stroke travel-limit disc
(and therefore the associated cams) is accom-
plished as follows:
(a) Manually crank the circuit-switcher to the
fully Closed position.
(b) Grasp the handwheel and turn it to the extent
possible in a direction opposite to the direc-
tion the output shaft rotates to close the
circuit-switcher. See Figure 10 on page 18.
(c) With the handwheel held in the position
indicated above, lower the closing-stroke
travel-limit disc approximately 3/16 of an inch
(5 mm) and rotate the disc until the arrow on
the outer ring is in line with the number 5 on
the indicator plate. Raise the disc, make sure
it is engaged, and release the handwheel.
STEP 3� After adjusting the travel-limit discs, check the
following:
(a) Place the selector handle in the Decoupled
position.
(b) Return the manual operating handle to its
Storage position.
(c) Reinsert the motor-circuit fuseholder.
(d) Operate the switch operator electrically to
open and to close as described in Step 4(c)
on page 17. Verify the rotation direction of
the travel-limit discs for opening and closing
corresponds with the rotation direction of
the output shaft and these directions agree
with the direction displayed in the cutaway
section on the outer ring of the travel-limit
discs.
Note: When electrical operation is performed
under the Decoupled or “no load” condition,
the travel limit discs do not stop at the indicator
plate positions for which they were previously
set in Steps 1 and 2. This may be disregarded.
STEP 4� There should always be a certain amount of
“unwind” or relaxation of the output shaft (in

20 S&C Instruction Sheet 719-500
Adjusting the Switch Operator
both the Open and Closed positions) to indicate
the circuit-switcher has been driven to a positive-
toggle position against its open (or closed) stops.
(a) Place the selector handle in the Coupled
position. Operate electrically to open the
circuit-switcher and determine the amount
of overtravel in the opening direction by
releasing the motor brake and noting how
far the output shaft “unwinds.”
NOTICE
Before checking the “unwind” after a closing
stroke, remove the motor-circuit fuseholder
before releasing the motor brake� Excessive
“unwind” at this point could cause travel-limit
switch rotation sufficient to pick up a “bb”
contact that, in turn, would cause the switch
operator to open (if energized)�
(b) Release the motor brake by unlatching
the manual operating handle and pivoting
it rapidly, with a snap motion, toward its
Cranking position. Then, return the manual
operating handle to its Storage position.
(c) If adjustment is needed, remove the motor-
circuit fuseholder. To increase the amount
of “unwind,” move the opening stroke travel-
limit disc (to increase travel) one indicator
plate number at a time. See Figure 11 on
page 21.
Note: The direction of disc rotation is always
the same as that of the output shaft. The output
shaft should never have sufcient “unwind” when
the switch operator is decoupled to cause travel
limit disc rotation. If travel-limit disc rotation is
evident, advance the opening-stroke travel-limit
disc (to decrease travel) an amount necessary
only to eliminate the “unwind” rotation of the
travel-limit discs.
STEP 5� With the manual operating handle in its Storage
position, reinsert the motor-circuit fuseholder,
and operate the switch operator electrically to
close the circuit-switcher. Repeat the procedure,
as described in Step 4 and in Figure 11, and adjust
the closing-stroke travel-limit disc one indica-
tor plate number at a time to obtain the correct
amount of overtravel in the closing direction.
STEP 6� Operate the circuit-switcher several times electri-
cally with the switch operator and observe the
action. Operation should appear smooth, with
the circuit-switcher drive-shaft cranks coming to
rest rmly against their stops, in an Overtoggle
position, in both opening and closing directions.