S&C Scada-Mate SD Owner's manual

April 22, 2019
© S&C Electric Company 2019, all rights reserved Instruction Sheet 775-510
S&C Scada-Mate®SD Switching System
Outdoor Distribution (14.4 kV and 25 kV)
Upright and Upright with
Extra Mounting Clearance
Installation and Operation
Table of Contents
Section Page Section Page
Introduction
Qualified Persons ........................... 2
Read this Instruction Sheet ................... 2
Retain this Instruction Sheet. . . . . . . . . . . . . . . . . . . 2
Proper Application .......................... 2
Warranty .................................. 2
Safety Information
Understanding Safety-Alert Messages........... 3
Following Safety Instructions .................. 3
Replacement Instructions and Labels ........... 3
Location of Safety Labels and Tags ............. 4
Safety Precautions ...........................5
Shipping and Handling
Packing ................................... 6
Inspection ................................. 6
Handling .................................. 7
Installation
Inserting Pole-Mounting Hardware...............8
Switch Installation............................9
Installing the Optional Pole Band and J-Bolts ......9
Grounding the Switch ........................10
Installing Surge Arresters .....................11
Preparing Connector and Terminal Pad Surfaces ..11
Installing Optional Wildlife Protection Components . 12
Installing the Control Unit .....................13
Connecting the Control Cable .................14
Power-Operated Switch Energization............16
Operation—For Switches with Power Operator
Pushbutton Operation........................17
Remote Operation ..........................17
Optional Disconnect Operation ................18
Emergency Manual Operation .................19
Dielectric Testing............................20

2S&C Instruction Sheet 775-510
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 com-
petent 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 an S&C
Scada-Mate SD Switching System. Familiarize yourself 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 sandc.com/en/support/product-literature/.
Retain this
Instruction Sheet
This instruction sheet is a permanent part of your S&C Scada-Mate SD Switching System.
Designate a location where you can easily retrieve and refer to this publication.
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
for the S&C Scada-Mate SD Switching System are listed in the ratings table in
Specification Bulletin 775-31. The ratings are also on the nameplate affixed to the
product.
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
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.)

S&C Instruction Sheet 775-510 3
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 S&C Scada-Mate SD Switching System. 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 Monitoring and Support
Center at 1-888-762-1100.
NOTICE
Read this instruction sheet thoroughly and carefully
before installing your S&C Scada-Mate SD Switching
System.
Replacement
Instructions
and Labels
If you need additional copies of this instruction sheet, 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.

4S&C Instruction Sheet 775-510
Safety Information
Reorder Information for Safety Labels
Location Safety Alert Message Description Number
AWARNING Stored-energy operating mechanism and switch base contain
fast-moving parts... G-6810
BNOTICE For manual operation, pull ring using a hookstick. G - 6811●
CDANGER Interrupter and terminal pads may be energized from either side
and in any position. G-6812■
DWARNING Electrocution Hazard—Switch and control unit enclosure must
be installed and grounded ONLY by qualified personnel... G-6815▲
EWARNING Lifting Instructions G-9260▲
FNOTICE Shorting blocks... G-6351●
●Switches with a hookstick operating mechanism do not have this label.
■This label is on both sides of the switch base on opposite ends.
▲This is a tag to be removed and discarded after the switch is installed and adjusted.
Location of Safety Labels and Tags
D
B
C
E
A
F

S&C Instruction Sheet 775-510 5
Safety Precautions
DANGER
Scada-Mate SD Switching Systems carry high voltage. Failure to observe the
precautions below will result in serious personal injury or death.
Some of these precautions may differ from your company’s operating procedures
and rules. Where a discrepancy exists, follow your company’s operating procedures
and rules.
1. QUALIFIED PERSONS. Access to the Scada-Mate
SD Switching System 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. Scada-
Mate SD Switching Systems contain fast-moving
parts that can severely injure fingers. Do not remove
or disassemble operating mechanisms or remove
access panels on the Scada-Mate SD switch base
unless directed by S&C Electric Company.
6. ENERGIZED COMPONENTS. Always consider all
parts live until de-energized, tested, and grounded.
7. GROUNDING. Before energization and at all times
when energized, the switch base and control unit
enclosure must be connected to suitable earth ground
at the base of the pole in accordance with the S&C
instruction sheet furnished with this device.
The switch base ground must also be connected to the
system neutral. If the system neutral is not present,
proper precautions must be taken to ensure the local
earth ground cannot be severed or removed.
8. LOAD INTERRUPTER SWITCH POSITION. Always
confirm the Open/Close position of load-interrupter
switches by visually observing the indicator.
Interrupters, terminal pads, and disconnect blades on
disconnect-style models may be energized from
either side of the Scada-Mate SD switch.
9. MAINTAINING PROPER CLEARANCE. Always
maintain proper clearance from energized
components.

6S&C Instruction Sheet 775-510
Shipping and Handling
Packing The S&C Scada-Mate SD switch shipment will include the following items:
• A three-pole group-operated integer style Scada-Mate SD switch, complete with an
interphase drive and stored-energy operating mechanism (or hookstick-operating
mechanism), factory-assembled on a single base
• Optional features shipped unassembled, such as wildlife protection components,
shielded control cable, and surge arrester brackets
A drawing of the switch and wiring diagrams are located in a water-resistant
envelope shipped with the switch. Study these drawings carefully and check the parts
list to verify all parts were shipped.
When sensors are furnished with the switch, a yellow card containing magnitude
ratios and phase-angle measurements for S&C Current Sensor(s) or S&C Current/Voltage
Sensors is included in the water-resistant envelope. These values must be programmed
into the remote terminal unit (RTU) installed with the switch, if applicable, to apply
correction for the unit-to-unit variations in the sensors. The S&C Sensor information is
also stamped onto a plate mounted on the side of the sensor terminal pad. Refer to the
instruction sheet provided with the control unit for further information.
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 containers listed therein 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.

S&C Instruction Sheet 775-510 7
Figure 2. The location of lifting bracket. The switch should only
be lifted at this point.
Figure 1. A Scada-Mate SD switch in its shipping crate.
Raised slots for lift forks
Crate
Handling
Follow these steps when handling an S&C Scada-Mate
SD switch:
STEP 1. Uncrate the switch. The crate is designed to be
moved and lifted using a lift truck. Indentations
on the bottom of the crate are provided for
inserting the lift-truck forks. See Figure 1.
Switches in the compact-crossarm upright
and compact-crossarm upright—extra mount-
ing-pole clearance configurations are provided
with a single-point retractable lifting bracket
that is permanently attached to the switch base.
See Figure2.
STEP 2. Secure the lifting slings to the switch before
unbolting the switch from the crate. Remove all
packing materials before lifting the switch.
Shipping and Handling
Lifting bracket
(extended)
NOTICE
Do not lift the switch by rigging on the
switch pole bases, the interrupters, the
wooden packing crate, the sensors, or
the interrupter OPEN/CLOSE indicator.
Damage to the switch may result.
CAUTION
Do not use the lifting bracket to lift the
crated switch from the truck or other
conveyance. The lifting bracket will only
hold the weight of the switch and will NOT
hold the weight of the crated switch and
associated packing materials.
Failure to uncrate the switch before
lifting may cause damage to the switch or
personal injury.
WARNING
To maintain proper electrical clearance,
make sure the lifting bracket is placed in the
retracted position after the installation.
Failure to do so may increase the risk of
flashover.

8S&C Instruction Sheet 775-510
Figure 3. Drill two holes as specified on the catalog drawing.
Insert the through-bolts.
Mounting
holes with
through-
bolts and
square
washers
Installation
Inserting Pole-Mounting Hardware
Follow these steps when installing the pole-mounting
hardware:
STEP 3. Drill two /-inch (17-mm) diameter holes in the
front of the utility pole at the desired height for
mounting the switch. See Figure 3. Refer to the
catalog drawing. The centerline-to-centerline
distance of the holes must be 14 inches (356 mm).
STEP 4. Insert two ⅝-inch diameter through bolts (not
furnished) in the holes drilled in Step 3. Secure
these bolts loosely with necessary washers and
nuts in such a manner the heads of the bolts
project sufciently, approximately 3 inches
(76mm), from the face of the pole to engage the
switch pole-saddle. See Figure 3.
NOTICE
When mounting the switch to a wood pole, it is
recommended that suitably sized square
washers be placed under the nuts against
the wood pole. The use of spring-type
washers between the square washers and
nuts is also recommended to compen-
sate for wood-pole shrinkage and maintain
fastener tightness.

S&C Instruction Sheet 775-510 9
Switch Installation
Follow these steps when installing the Scada-Mate SD
switch:
STEP 5. Handle and lift the switch per the “Handling”
section on page 7. When the switch is hoisted to
mounting level, guide the switch so the through-
bolts projecting from the utility pole slip into the
holes in the pole-saddle. The saddle has a keyhole
and an open slotted hole for this purpose. Lower
the switch slightly so it bears on the through-
bolts. Fully tighten the through-bolts, making
sure the at washer for each bolt is between the
bolt head and the pole-saddle. See Figures 4
and 5.
NOTICE
Do not lift the switch by rigging on the
switch pole bases, the interrupters, the
sensors, or the interrupter OPEN/CLOSE
indicator. Damage to the switch may result.
CAUTION
Do not use the lifting bracket to lift the crated
switch from the truck or other conveyance.
The lifting bracket will ONLY hold the weight
of the switch and will NOT hold the weight of
associated packing materials.
Failure to uncrate the switch before
lifting may cause damage to the switch or
personal injury.
Installing the Optional Pole Band and J-Bolts
Conduct the following steps to install the optional pole
band and J-bolts:
STEP 6. Secure the optional pole band to the pole-saddle
using the J-bolts provided. Two ¼×1 ×
3-inch (6 ×25 ×76-mm) stiffening blocks are
furnished to be used behind the pole-band
anges and underneath the J-bolt nuts. Fully
tighten the nuts. Attach the pole band to the back
side of the pole through the hole in the center of
the band using one of the three ½-inch diameter
lag screws provided. See Figure 5. Then, attach
the pole-saddle to the pole using the two
remaining ½-inch diameter lag screws.
STEP 7. When all nuts and lag screws have been fully
tightened, remove the hoisting sling from the
lifting bracket. Push the lifting bracket
downward to lower it.
Figure 4. Slide the pole saddle onto the extended through-bolts.
Figure 5. Rear of the pole showing the mounting hardware and
the optional J-bolts and pole band.
Lower through bolt
(not visible)
Lifting sling
Upper
through-bolt
J-bolt
Lag hole
Lifting
bracket
Stiffening
block
Pole-band
J-bolt
Through-bolts
(user-furnished)
J-bolt
Installation

10 S&C Instruction Sheet 775-510
WARNING
To maintain proper electrical clearance,
make sure the lifting bracket is placed in the
retracted position after the installation.
Failure to do so may increase the risk of
flashover.
Optional extension link assemblies, if supplied, are
shipped assembled to the switch.
Grounding the Switch
Use the following procedure when grounding the Scada-
Mate SD switch:
STEP 8. A grounding lug is provided with the switch and
should be installed in the hole on the pole-saddle.
See Figure6. It is essential to ground the switch
to maintain sensor accuracy, prevent damage to
the control cable from lightning strikes or energy
surges, and to direct any surge path through the
ground, and not through the control unit, where
damage or personal injury may occur. Ground
the switch by solidly connecting the end of a
number 2 AWG wire (or two number 6 AWG
wires, or wires having an equivalent cross-
sectional area) to the grounding lug on the pole-
saddle. See Figure6.
Insert the ground wire into the ground-lug
hole and tighten the nut on the rear of the pole-
saddle. Connect the ground wire(s) to a suitable
earth ground at the base of the pole and bond
them to the system neutral, if present. Proper
precautions must be taken to ensure the local
earth ground cannot be severed or removed.
WARNING
Before energization and at all times
when energized, the Scada-Mate SD
Switch base and control unit enclosure, if
provided, must be connected to a suitable
earth ground at the base of the pole and
bonded to the system neutral, if present, in
accordance with this instruction sheet. Proper
precautions must be taken to ensure the
local earth ground cannot be severed or
removed.
Failure to observe these instructions can
result in serious personal injury or death.
Figure 6. The grounding lug.
Installation
Grounding lug

S&C Instruction Sheet 775-510 11
Figure 7. A typical surge arrester mounting arrangement.
(Optional disconnect and front brackets shown.)
Figure 8. The Scada-Mate SD switch terminal pad. The discon-
nect pad is shown. Do not wire-brush the surfaces.
Plated terminal pad
Figure 9. The sensor terminal pad. Do not wire-brush the
surfaces.
Sensor terminal pad
Installing Surge Arresters
Use the following procedure when installing surge
arresters on a Scada-Mate SD Switching System:
STEP 9. Install surge arresters (customer furnished), if
applicable, using the mounting provisions
provided. Surge arrester brackets are provided
on the pole-saddle side of the switch and are
optionally available on the front side of the
switch. Each surge arrester bracket has three
-inch (14-mm) diameter holes. Mount the surge
arrester using one of the holes and connect the
surge arrester ground to one of the other holes.
When properly installed and connected, the
surge arresters are grounded through the switch
base. A separate ground wire can be run for the
arresters at user discretion. See Figure 7.
Preparing Connector and Terminal Pad
Surfaces
Before installing connectors on the terminal pads, use the
following procedure to prepare their surfaces:
STEP 10. Do not wire-brush Scada-Mate SD switch
terminal pads. They are plated, and wire
brushing will scratch the protective coating.
Apply a coating of high-voltage connector grease
to these pads before securing the connectors to
the terminal pads. See Figures 8 and 9.
STEP 11. Securely tighten the connector using customer-
supplied ½—13 UNC hardware. Typical
tightening torque may vary depending on the
hardware type and material. Check with the
manufacturer for correct torque.
STEP 12. Prepare the conductors using established
procedures before clamping them in their
respective connectors. Torque S&C connectors
to between 40 and 50 ft-lbs.
CAUTION
DO NOT apply excessive load to the
terminal 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
misalign the blades with the stationary
contacts or prevent proper closing.
Do not exceed 90 lbs. in line and 30 lbs.
perpendicular to the terminal pad. (IEEE
Standard ANSI C37.32-1996, Section
8.8.2.2.)
Misaligned contacts may overheat,
causing arcing and damage to the switch.
Damage to equipment and injury to
operating personnel may result.
Installation
Surge arrester brackets
Surge arrester brackets

12 S&C Instruction Sheet 775-510
Installing Optional Wildlife Protection
Components
If the Scada-Mate SD Switch is supplied with optional
wildlife protection (catalog number suffix “-W”), all
protective components are assembled to the switch except
those for the terminal pads. The terminal pad components
are shipped unassembled from the switch and must be
installed after the conductors are attached to the terminal
pads. For installation instructions refer to S&C Drawing
RD-6794.
STEP 13. To install the optional wildlife protection
components, rst, prepare the surfaces of the
terminal pads and connectors as described in
Step 10 on page 11. Then, attach the connectors
to the terminal pads and connect the conductors
or cables.
NOTICE
Only S&C connectors catalog numbers
474R1, 474R2 and 4581, as well as
compression connectors, can be used with
optional wildlife protection.
STEP 14. Secure the wildlife-protection covers in place
by snapping the fasteners provided as shown on
RD-6794.
Installation

S&C Instruction Sheet 775-510 13
Installing the Control Unit
Before connecting the control cable and energizing the
Scada-Mate SD switch, install the control unit to be used
with the switch. Also complete all connections associated
with the control unit. This instruction sheet provides a
general overview of the installation of control units of S&C
manufacture. Refer to the instruction sheet included with
your control unit for more information.
Use the following procedure when installing the control
unit for power-controlled Scada-Mate SD switches:
STEP 15. Ground the enclosure by solidly connecting one
number 6 AWG wire (or wires of equivalent
cross-sectional area) to the ground lug on the
back of the enclosure. Solidly connect the
enclosure ground wire to the switch ground
wire(s). See Figure10.
WARNING
Before energization and at all times when
energized, the Scada-Mate SD switch base
and control unit enclosure must be
connected to a suitable earth ground at the
base of the pole and bonded to the system
neutral, if present. Proper precautions must
be taken to ensure the local earth ground
cannot be severed or removed.
Failure to observe these instructions can
result in serious personal injury or death.
Figure 10. Ground the enclosure.
Ground lug
Installation

14 S&C Instruction Sheet 775-510
Connecting the Control Cable
Use the following procedure to connect the control cable
for power-controlled Scada-Mate SD switches:
NOTICE
Shorting blocks for sensor secondaries are shipped
installed in the switch connector. Remove the shorting
blocks before connecting the control cable. Save the
shorting blocks and cable plug cover for future use.
STEP 16. An optional liquid-tight control cable may be
included with the Scada-Mate SD switch for
connection of the switch to the control unit.
(a) Remove the control cable from its shipping
carton.
(b) The control cable is provided with a multi-pin
connector plug (male) for connection to the
switch and a multi-pin connector receptacle
(female) for connection to the control unit.
Locate the connector receptacle on the front of
the switch base and remove the dust cover.
(c) Remove the sensor shorting blocks from the
receptacle and attach the control-cable plug.
(d) Secure the connection with the connector clips.
(e) Retain the dust cover and sensor shorting blocks
for future use. See Figure11.
STEP 17. Locate the receptacle on the back of the control
unit enclosure.
(a) Remove the dust cover, and attach the control-
cable connector plug.
(b) Secure the connection with the connector clips.
(c) Retain the dust cover for future use. See
Figure12.
Figure 11. Plug the connector into the socket and secure with
the clips.
Figure 12. Connecting the control cable to the control unit
enclosure.
Connector plug
(male)
Connector receptacle
(female)
Clips
Connector receptacle
Clips
Connector receptacle
Connector clips
Control cable
Connector plug
Security belt
Control cable
Control cable
Connector receptacle
Connector receptacle
Installation

S&C Instruction Sheet 775-510 15
Security belt
Padlock (provided
by others)
Drip loop
(maintain a 9-inch
(229-mm) minimum
radius when bending
the control cable)
(provided
(provided
(maintain a 9-inch
(229-mm) minimum
(229-mm) minimum
radius when bending
(229-mm) minimum
Figure 13. Connecting the control cable to the control unit
enclosure.
STEP 18. Form a drip loop with the control cable where it
attaches to the control unit.
(a) Maintain a 9-inch (229-mm) minimum radius
when bending the control cable at the drip loop
and at the switch connection.
(b) Attach the control cable along the length of the
utility pole and secure the control cable to the
utility pole using suitable guards or clamps.
(c) Form a coil with any excess control cable,
maintaining a 9-inch (229mm) minimum radius,
and secure it to the utility pole. See Figure13.
STEP 19. A stainless steel security belt is included with
the control unit for padlocking the multi-pin
connector to the control unit. See Figure12 on
page 14. Place the security belt around the
connector between the connector clips and the
enclosure, and insert a padlock (not furnished)
through the holes provided. See Figure13.
Installation

16 S&C Instruction Sheet 775-510
Figure 14. S&C Model 6801 Automatic Switch Control.
Power-Operated Switch Energization
WARNING
Before energization and at all times when
energized, the Scada-Mate SD switch base and
control unit enclosure, if provided, must be connected
to a suitable earth ground at the base of the pole
and bonded to the system neutral, if present. Proper
precautions must be taken to ensure that the local
earth ground cannot be severed or removed.
Failure to observe these instructions can result in
serious personal injury or death.
CAUTION
The stored-energy operating mechanism and the
switch base contain fast-moving parts that can severely
injure fingers. Do not remove or disassemble the oper-
ating mechanism or remove the access panel on the
switch base unless directed by S&C Electric Company.
Use the following procedure to energize the power-
operated switch:
STEP 20. After making all user connections to the control
unit, if applicable, in accordance with the S&C
instruction sheet covering the applicable control
unit, or the manufacturer’s instruction sheet,
energize the Scada-Mate SD switch according to
standard operating practices. For power-
operated switches, conrm the power and
selector switches are in the correct position and
the appropriate LEDs are illuminated as
detailed in the instruction sheet for the applicable
control unit. See Figure14.
DANGER
The interrupters and terminal pads of the
Scada-Mate SD switch may be energized
from either side and in any position. Before
inspecting, servicing, or repairing this switch
or working on the conductors on either side of
the switch, test for voltage using proper high-
voltage test equipment. Then, install suitable
grounding equipment.
Failure to observe these precautions may
result in serious injury or death.
Installation

S&C Instruction Sheet 775-510 17
Pushbutton Operation
Use the following procedure to operate the various Scada-
Mate SD switch pushbuttons:
STEP 21. All S&C control units and most control units of
other manufacture have a Local/Remote
feature. To operate, place the LOCAL/REMOTE
switch inside the control unit to the Local
position. Refer to the instruction sheet furnished
with the control unit. The switch can now only be
operated locally.
Then, press the OPEN or CLOSE pushbut-
ton as appropriate. See Figure 15. The inter-
rupter OPEN/CLOSED indicator on the end
of the Scada-Mate SD switch base indicates
interrupter contact position: the target with
an “O” indicates the interrupters are in the
Open position; the target with a “C” indicates
the interrupters are in the Closed position.
The indicator does not show status of the
disconnects.
Remote Operation
Use the following procedure to set up the Scada-Mate SD
switch for remote operation:
STEP 22. Place the LOCAL/REMOTE switch inside the
control unit in the Remote position. Refer to the
instruction sheet furnished with the control unit.
The Scada-Mate SD switch can now only be
operated by remote supervisory control. By using
the SCADA system, the dispatcher can test the
electrical operation of the switch and the entire
SCADA control path, including communications.
See Figure 15. The interrupter OPEN/CLOSED
indicator on the end of the Scada-Mate SD switch
base indicates interrupter contact position: the
target with an “O” indicates the interrupters are
in the Open position; the target with a “C” indi-
cates the interrupters are in the Closed position.
The indicator does not show the status of the
disconnects. See Figure16.
Figure 16. The optional disconnect.
Figure 15. Operating the switch using the LOCAL/REMOTE switch
inside the CCU.
The switch control includes OPEN/CLOSE
pushbuttons, switch-position indicating
lamps, disconnect closed and latched
indicating lamps, a LOCAL/REMOTE
switch, and an operation counter
Operation—For Switches with Power Operator
Disconnect
Pole-unit
OPEN/
CLOSED
indicator

18 S&C Instruction Sheet 775-510
Optional Disconnect Operation
The optional disconnects for the Scada-Mate SD switch
are single-phase disconnects. Each disconnect is operated
separately from the other. Unless specied otherwise, the
disconnects will be pre-installed to the switch terminal
pads. See Figure 16 on page 17.
Users will need to implement operating procedures to
ensure all three disconnects are closed before the switch is
closed and all disconnects are only opened after the switch
has been opened. The disconnects mechanically interlock
with the switch, preventing the closing of the switch unless
all three disconnects are closed. The disconnects are
blocked from opening when the switch is closed. Even with
this feature, users must establish operating procedures to
ensure all disconnects are open when the switch is open
before a true three-phase “visible-break” is attained.
To manipulate the disconnect operating ring, follow the
procedure below using a conventional insulated hookstick
or S&C Universal Pole and Pole Extension (if required) fit-
ted with a heavy-duty hook-tool such as the S&C Substation
Prong or equivalent.
STEP 23. Verify the switch is open by checking the OPEN/
CLOSE indicator on the end of the switch. See
Figure 17. Place the LOCAL/ REMOTE switch
inside the control unit in the Local position
before operating the disconnect. Refer to the
instruction sheet furnished with the control
unit. Now the switch can only be operated
locally.
STEP 24. Open the disconnect by pulling down on the
operating ring. See Figure 18. The latch will
release and the disconnect can be pulled open.
Disengage the hookstick from the operating ring.
Repeat with the remaining two disconnects.
The switch is interlocked in the Open
state while the disconnects are in the fully Open
position.
Figure 17. The Scada-Mate SD switch in the Open position.
Figure 18. Open the disconnect by pulling the operating ring
downward with a hookstick.
Operation—For Switches with Power Operator
Operating
ring
Indicator in
Open position
Indicator in
Open position
Pull operating
ring downward
Hookstick

S&C Instruction Sheet 775-510 19
STEP 25. Close the disconnect by pushing the operating
ring into the contact. See Figure 19. When the
blade contact latch is completely closed, the
operating ring will tilt backward into the blade
contact. Disengage the hookstick from the
operating ring. Repeat with the remaining two
disconnects. The switch can now be closed.
The disconnects are mechanically blocked
in the Closed position while the switch is in the
Closed state.
Emergency Manual Operation
STEP 26. Scada-Mate SD Switches are capable of manual
interrupter operation. In the event of electrical
power loss, a standard or extendible hookstick is
used to open and close the interrupters. If the
spring is fully discharged, pull on the operating
mechanism pull-ring with the hookstick seven to
nine times to effect a change of state. If the spring
is partially charged, a single pull will change the
interrupter position. See Figure20.
Figure 19. Push the blade into contact.
Figure 20. Manual operation with a hookstick.
Operation—For Switches with Power Operator
Pull ring downward
Hookstick
Operating
ring
Push ring upward
Indicator in
Open position

20 S&C Instruction Sheet 775-510
For the convenience of users who normally perform
electrical tests on system components such as Scada-Mate
SD switches, appropriate withstand test values are given
in Table 1. These test values are signicantly greater than
the normal operating voltage of the Scada-Mate SD switch
and are near the ashover voltage of the equipment. They
should be applied only when the Scada-Mate SD switch is
completely de-energized and disconnected from all power
sources.
WARNING
The following test procedures must be performed
by qualified persons who are knowledgeable in the
installation, operation, and maintenance of overhead
electric power distribution equipment along with the
associated hazards.
DANGER
When performing electrical withstand tests on Scada-
Mate SD Switching Systems, observe the following
precautions:
1. Completely de-energize the Scada-Mate SD switch
and disconnect the phase conductors from all six
terminal pads. If the Scada-Mate SD switch is
supplied with the optional wildlife protection feature
(catalog number suffix “-W”), slide the tap cover
back far enough to gain access to the terminal pads.
Then, remove the upper and lower terminal-pad
covers to permit the removal of the phase
conductors. Retain the covers for reinstallation at
the conclusion of the test.
2. At each of the six terminal pads, disconnect the
leads for the surge arresters. Make sure the surge
arrester leads are tied back so they are at least
8inches (203 mm) from any terminal pad.
3. Open the Scada-Mate SD switch interrupters
manually by using a hookstick to pull down on the
OPEN lever. For disconnect-style models, close
the hookstick-operated disconnects.
Failure to observe these precautions can result in
a flashover, injury, and equipment damage.
Dielectric Testing
Table 1. Withstand Test Voltage
Rating, kV Withstand Test Voltage, kV
Nom. Max. 60-Hz, RMS①② Dc Impulse (BIL)
14.4 17 32 45 110
25 29 52 74 125●
①The 14.4-kV test values are limited by the internal sensor spark-gap
rating.
②The 25-kV test values are approximately 75% of the design values.
●Refer to Table 2.
Table 2. 25-kV Scada-Mate SD Switch BIL Ratings
Without Optional
Disconnect With Optional Disconnect
Vacuum
Interrupter BIL Vacuum
Interrupter
Optional
Disconnect BIL
Closed 150 kV
Open Open 150 kV
Closed Closed 150 kV
Open 125 kV Open Closed 125 kV