S&C PureWave SMS-250 User manual

May 29, 2018
© S&C Electric Company 2017-2018, all rights reserved Instruction Sheet 659-555
S&C PureWave®SMS-250 Storage Management System
263 kW/263 kVA, 380 V
Power Conversion System
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
Warranty Qualifications .........................2
Safety Information
Important Safety Instructions .....................3
Understanding Safety-Alert Messages .............3
Following Safety Instructions .....................3
Replacement Instructions and Labels ..............3
Location of Safety Labels........................4
Trip Settings ..................................5
Breaker Protection Curves .......................6
Safety Precautions ............................7
Shipping and Handling
Packing......................................8
Inspection ....................................9
Handling .....................................9
Installation, Assembly, and Setup
System Design ...............................11
Concrete Pad Specifications ....................11
Pad Requirements ............................11
Shimming, Grouting, and
Caulking the PCS Enclosure ..................12
Mounting....................................12
Cable Terminations ...........................13
Battery Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Power Connections ...........................13
Wiring ......................................13
Lugs for Battery and Power Connections ..........14
Metering Current Transformers ..................14
Earth Reference and Bonding ...................14
Communications Signal Reference Requirements ...15
Inspection Recommendations
Before Completing the Installation ................16
Pre-Startup Checklist ..........................16
Annual Inspections............................16
Installation

2S&C Instruction Sheet 659-555
Qualified Persons WARNING
The equipment covered by this publication must be installed, operated, and main-
tained by qualified persons who are knowledgeable in the installation, operation, and
maintenance of energy storage equipment along with the associated hazards. A
qualified person is one who is trained and competent in:
• The skills and techniques necessary to distinguish exposed live parts from nonlive
parts of electrical equipment
• The skills and techniques necessary to determine the proper approach distances
corresponding to the voltages and arc flash levels to which the qualified person will
be exposed
• The proper use of the special precautionary techniques, personal protective
equipment, insulating and shielding materials, and insulated tools for working on or
near exposed energized parts of electrical equipment
These instructions are intended only for such qualified persons. They are not intended
to be a substitute for adequate training and experience in safety procedures for this type
of equipment.
Read this
Instruction Sheet NOTICE
Read this instruction sheet thoroughly before operating and maintaining the PureWave
SMS-250 Storage Management System. Familiarize yourself with the Safety Information
and Safety Precautions on pages 3 through 7. The latest version of this instruction sheet
is available online in a PDF format at sandc.com/en/support/product-literature/.
Retain this
Instruction Sheet
This instruction sheet is a permanent part of your power conversion system (PCS). It does
not include instruction sheets from the original battery manufacturer. Instruction sheets
such as this one can be placed inside a compartment in the PCS enclosure, where they can
be easily retrieved for future use.
Proper Application WARNING
The equipment in this publication must be selected for a specific application. The
application must be within the ratings furnished for the equipment. Failure to do so can
result in damage to equipment.
Warranty The warranty and/or obligations described in S&C’s standard conditions of sale, as set forth
in Price Sheet 150, 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 all seller’s 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, 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
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.
Warranty
Qualifications
The seller’s warranties are contingent upon the installation and adjustment of the S&C
PureWave SMS-250 Storage Management System in accordance with S&C’s applicable
instruction sheets, data sheets, and/or data bulletins.
Introduction

S&C Instruction Sheet 659-555 3
Important Safety
Instructions
SAVE THESE INSTRUCTIONS
This manual contains important instructions for the PureWave® SMS-250 Storage Management
System that shall be followed during installation and maintenance of the SMS-250.
Understanding
Safety-Alert
Messages
Several types of safety-alert messages may appear throughout this instruction sheet and
on labels attached to the PCS. 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 Office or S&C Authorized Distributor. Their tele-
phone numbers are listed on S&C’s website sandc.com, or call S&C Headquarters
at [phone]; in Canada, call S&C Electric Canada Ltd. at [phone].
NOTICE
Read this instruction sheet thoroughly and carefully
before installing or operating your S&C PureWave SMS-
250 Storage Management 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.
Safety Information

4S&C Instruction Sheet 659-555
A
Safety Information
A B C
Location of Safety Labels
C
C
C
Reorder Information for Safety Labels
Location Safety Alert Message Description Part Number
ADANGER KEEP OUT. RISK OF ELECTRICAL SHOCK … PE-70479-1
B●NOTICE REAR CLEARANCE … PE-70482-1
CDANGER ARC FLASH AND SHOCK … PE-70483-1
●Label is on the left and right sides of the PCS enclosure.
Symbols and Terminal Markings
The “
” symbol represents the power on button. When the button with the “ ” symbol is pressed, the breaker
places the equipment into a fully-powered state.
Equipment grounding conductor.
The “ ” symbol represents the power off button. When the button with the “ ” symbol is pressed, the breaker dis-
connects the load side from the power source. The ac breaker disconnects the ac output to theload. A dc breaker
to disconnect the PureWave SMS-250 from the battery is not included in the equipment and must be considered
in the system design.
Direct current, also indicated as dc.
Alternating current, also indicated as ac.
A

S&C Instruction Sheet 659-555 5
Trip Settings
The PCS will trip under the conditions shown in Table 1.
Table 1. Default Trip Settings
Default Limits Default Limits Adjustable Range
Nominal Value Trip Time (Sec.) Value Trip Time (Sec.)
<0.5 Vnom 380 V 190 V 0.16 150-370 V 0.1- 3 0 0
0.5 Vnom ≤ V < 0.88
Vnom
380 V 334 V 2150-370 V 0.1-300
1.1 Vnom ≤ V < 1.2
Vnom
380 V 418 V 1390-532 V 0.1- 3 0 0
1.2 Vnom ≤ V 380 V 456 V 0.16 390-532 V 0.1-300
Frequency, 60 Hz 60 Hz 60 ±1.5 Hz 0.15 60 ±2.5 Hz 0.1- 3 0 0
NOTICE
Obtain approval from the authority having jurisdiction before adjusting these setpoints. During abnormal voltage or
frequency conditions or in response to a detected unintentional islanding, the system will open the ac circuit breaker.
In case of a short circuit on the output of the PCS, the current and duration contribution from the PCS is explained in Table 2.
Table 2. Ac Output Short-Circuit Contribution
Condition Amps Duration
Short L1 - L2
Short-circuit current — initial: amps (rms) and duration of 16.7 ms or 1 cycle 1612.4 A(rms) 16.68 ms
Short-circuit current — maximum: amps (peak) and duration (ms) 2280 A(rms) 16.68 ms
Short-circuit current — breaking: amps (RMS) and duration (ms) 0 Arms -
Short L1 - L3
Short-circuit current — initial: amps (rms) and duration of 16.7 ms or 1 cycle; 1110.3 A(r ms) 13 ms
Short-circuit current — maximum: amps (peak) and duration (ms) 1570 A(peak) 13 ms
Short-circuit current — breaking: amps (RMS) and duration (ms) 0 A(rms) -
Short L2 - L3
Short-circuit current — initial: amps (rms) and duration of 16.7 ms or 1 cycle; 1354.3 A(rms) 16.55 ms
Short-circuit current — maximum: amps (peak) and duration (ms) 1915 A(peak) 16.55 ms
Short-circuit current — breaking: amps (RMS) and duration (ms) 0 A(rms) -
The PCS is set to trip in the unbalance conditions stated in Table 3.
Table 3. Unbalance Conditions
Output Measured (V) Output Measured (V) Output Measured (V) Output Freq
(Hz) Output Power (kW) Current unbalance (%)
368.6 368.2 367.6 60.01 0 0.14
352.5 351.74 351.86 60 25 0.14
356.44 355.54 355.67 60 45 0.15
358.46 358.43 358.19 60 66 0.02
357 357.27 356.98 59.999 90 0.05
355.93 356.15 355.87 59.999 108 0.04
355.87 355.87 355.73 59.999 138 0.02
357.17 356.9 356.76 59.999 200 0.08
357.89 357.57 357.48 59.999 240 0.08
357.84 358.62 358.37 59.999 285 0.09
Safety Information

6S&C Instruction Sheet 659-555
Safety Information
Breaker Protection
Curves
The power conversion system has a xed output. The ac breaker is congured at the factory
with the following protection curve:
Current in Amperes

S&C Instruction Sheet 659-555 7
Safety Precautions
DANGER
The PureWave SMS-250 Storage Management System operates at hazardous
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 PureWave
SMS-250 system must be restricted only to qualified
persons. See “Qualified Persons” on page 2.
2. SAFETY PROCEDURES. Always follow safe oper-
ating procedures and rules.
3. PERSONAL PROTECTIVE EQUIPMENT. Always
use suitable protective equipment, such as rubber
gloves, rubber mats, hard hats, safety glasses, and
flame-retardant 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. ENCLOSURE. Do not open access doors unless the
system is offline or otherwise authorized by S&C
Electric Company.
6. MAINTAINING PROPER CLEARANCE. Always
maintain proper clearance from energized com-
ponents, ensuring the dead-front access panels are in
place after maintenance and before operation.
7. HAZARDOUS VOLTAGES. Hazardous dc voltage is
present even without utility power connected.
Hazardous voltages should also be expected in all
interconnecting components and lines.
To maintain safety, the user should use a padlock on
the door of the power conversion system (PCS)
enclosure. The door and the use of the padlock provide
protection against inadvertent contact with hazardous
voltages.
8. GROUNDING. For grounding purposes, the pro-
ceeding must be followed:
• The PCS base ground bar in the cable-termination
area must be connected to a suitable earth ground
for testing before energizing the unit and at all times
when energized.
• The overall ground system should be sufficient to
limit the ground potential rise (GPR), step voltage,
and touch voltage to acceptable limits as deter-
mined by the utility’s practices and the National
Electric Safety Code.
9. ENERGIZED COMPONENTS. Always consider all
parts live until de-energized, locked open, and tested.
10. ADDITIONAL CONNECTIONS. The user should not
attempt to connect any additional logic controls or
power connections to the PureWave SMS-250 system
(beyond the connections shown on the interconnect
drawing) without having received written approval
from S&C Electric Company.
11. INSULATED HAND TOOLS. To use insulated hand
tools, the proceeding must be followed:
• Insulated hand tools are required when working
on or around any energized equipment. Use only
properly rated tools for the energy present.
• Tool inventories should be kept to ensure that all
tools that enter the system enclosure are removed
before energizing the system.
12. EMERGENCY PROCEDURES AND EQUIPMENT.
For emergency procedures:
• The owner should develop policies and procedures
for handling emergency situations.
• It is the responsibility of the owner to develop site-
specific emergency action plans for response to
such situations.
13. ADDITIONAL SAFETY INSTRUCTIONS. Consult
the battery supplier for additional safety instructions
and procedures regarding the battery used for the
PureWave SMS-250 system.

8S&C Instruction Sheet 659-555
Shipping and Handling
Packing
The power conversion system enclosure ships in one piece.
See Figures 1 and 2.
NOTICE
The Human Machine Interface (HMI) computer and bat-
teries for the PureWave SMS-250 system are shipped
separately.
Figure 1. The power conversion system enclosure.
Figure 2. Internal view of the power conversion system.

S&C Instruction Sheet 659-555 9
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 shipping skids and containers listed thereon are present.
If there is visible loss and/or damage:
1. Notify the delivering carrier immediately.
2. Ask for a carrier inspection.
3. Note the 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
and/or damage.
Handling
NOTICE
The PCS enclosure shall be lifted according to lifting
drawing PEA-1610-4-IN and any other project-specific
lifting drawings supplied with the PureWave SMS-250
system. Lifting equipment such as spreader bars and
hoist sling straps are provided by others.
To avoid damaging the PCS enclosure when placing it at the
desired location, observe normal recommended procedures
as well as the following general instructions.
CAUTION
The PCS installer must ensure ALL lifting equipment,
beams, slings, chains, spreader bars, and apparatus
are properly rated for the identified load. Failure to do
so can result in equipment damage and personal injury.
NOTICE
Before lifting the PCS enclosure, make sure all doors
are closed and locked. The doors contribute to the
structural integrity of the system and, if left opened,
increase the risk of damage to the enclosure during
lifting.
WARNING
When handling the PCS enclosure with an overhead
hoist, observe standard lifting practices as well as the
following general instructions. Failure to follow these
procedures can result in serious personal injury and
equipment damage.

10 S&C Instruction Sheet 659-555
Shipping and Handling
To lift and place the PureWave SMS-250 PCS, follow these
procedures:
STEP 1. If spreader bars are used for lifting, make sure the
spreader bar(s) are secured.
STEP 2. Arrange the hoist slings so the lifting forces
are distributed equally. See Figure 3 for an
illustration of lifting the PCS enclosure. The
equipment must be lifted with a crane or forklift.
STEP 3. Avoid sudden starts and stops when lifting.
STEP 4. Properly place the PCS on the concrete pad. See
Figure 4 for the location of cable entry conduit and
mounting bracket installation areas. For further
details, refer to drawing PEA-1610-4-IN and the
other project-specic lifting drawings supplied
with the PureWave SMS-250 system.
STEP 5. Remove the sling straps.
Figure 3. Proper lifting of the power conversion system
enclosure.
Figure 4. Conduit and bracket measurements for pad-mounting.
This point should be at least
45 inches (1143 mm) above
the top of the PCS enclosure.
Dimensions are in
inches (millimeters)
3.50
(89 mm)
3.24
(82 mm)
2.00
(51 mm)
3.83
(97 mm)
AC POWER CABLE
ENTRY LOCATION
CONTROL &
COMMUNICATIONS CABLING
& WIRE ENTRY LOCATIONS
DC POWER CABLE
ENTRY LOCATION
CD-1720 BRACKET
10.80
(274 mm)
9.17
(233 mm)
32.00
(813 mm)
29.00
(737 mm)

S&C Instruction Sheet 659-555 11
Installation, Assembly, and Setup
System Design
The PureWave SMS-250 Storage Management System can be
connected to 380 Vac directly or, using an auto transformer,
to 400, 415, or 480 Vac, 3-phase, 50/60 Hz (to match system
frequency), 380-Vac delta primary, 265 kVA.
The storage management system consists of a 263-kW/
263-kVA power converter housed in a weatherproof enclosure
suitable for outdoor or indoor mounting on a concrete or
equivalent pad, which can be applied either with or without
a 618- to 850-Vdc battery pack, depending on the application-
specific requirements. For specific applications that do not
require a battery pack, the PureWave SMS-250 assembly will
be supplied without the dc EMI filter, and dc bus terminations.
The PureWave SMS-250 system can use a modular design
capable of parallel operation to achieve a rating of up to
526 kW/ 526 kVA.
NOTICE
Utility interconnection may require approval from the
authority having jurisdiction.
Concrete Pad Specifications
NOTICE
The concrete pad is provided by others.
The concrete pad on which the PCS enclosure will be placed
should be sized to accommodate the unit and its external
mounting brackets. The pad should be poured with a
maximum pitch of ½degree and should have a atness within
⅛inch (3.175 mm).
The pad should extend beyond the edge of the enclosure
by an adequate amount to prevent the pad from cracking
or breaking when the Hilti Kwik Bolt TZ anchor bolts are
installed to bolt the PCS enclosure to the pad.
Pad Requirements
General Requirements
The concrete pad contractor shall provide and be responsible
for determination and execution of the methods of construction
and for all safety precautions taken during construction. Site
visits by the structural engineer will not include inspection
of the means of construction. All construction shall be in
accordance with local code requirements. Please contact
S&C Electric Company for recommendations in accordance
with equipment requirements.
Pad Dimensions and Mounting Provisions
The concrete pad contractor is responsible for pad design and
dimensions. Reference the separately supplied drawing for the
footprint dimensions and stub-up locations. Both ac and dc
cable boxes are required to be supplied and installed by the
installer for the power conductor connection compartment
to aid in conductor terminations and connections.
NOTICE
Do not leave non-operating equipment in a high humidity
environment. Internal condensation may occur and affect
the operation of the unit.
Keep the equipment in a controlled environment until start-
up can be completed.
Concrete pad must be fully cured and dry before placing
equipment on top

12 S&C Instruction Sheet 659-555
Installation, Assembly, and Setup
Shimming, Grouting, and Caulking the
PCS Enclosure
To shim, grout, and caulk the PureWave SMS-250 PCS
enclosure, follow these procedures:
STEP 1. After placing the PCS enclosure at the desired
location, check whether there are any gaps between
the enclosure and the concrete pad.
STEP 2. If there are gaps, install shims until the enclosure is
level.
STEP 3. Apply grout at the bottom of the enclosure as
necessary to prevent entry of insects or debris into
the enclosure. The grout should be recessed
sufciently to permit injecting a bead of caulk
between the enclosure base and concrete pad.
STEP 4. Apply a bead of caulk (S&C part number 6943- 010,
DAP Premium Polyurethane Waterproof Concrete
& Masonry Sealant 300 ml Gray) around the outer
edge of the bottom ange (where it meets the
concrete pad) to provide a seal around the base of
the PCS. The purpose of the caulk is to further
prevent ingress of insects and debris into the
enclosure.
Mounting
STEP 5. Anchor the PCS enclosure to the concrete pad. Use
⅜-inch (10-mm) diameter × 2-inch (51-mm) embed
Hilti Kwik Bolt TZ anchors for each bracket. The
anchor brackets should be located at each corner,
as shown in Figure 5. Tighten the bolts again three
to ve days after the initial installation.
NOTICE
If seismic rating is required, ⅜-inch diameter
× 2-inch embed Hilti Kwik Bolt TZ anchors
must be installed at each mounting bracket
location. Failure to do so can result in damage
to equipment.
STEP 6. After pulling the cables, seal all conduit entrances
ontheoutsidewithroomtemperaturevulcanization
silicone sealant and on the inside with duct seal
foam to prevent water from entering the PCS
enclosure.
Figure 5. Mounting points.

S&C Instruction Sheet 659-555 13
Installation, Assembly, and Setup
Cable Terminations
NOTICE
For internal bus and cabling connections, refer to instal-
lation drawing PEA-1610-4-IN and any project-specific
drawings supplied with the PureWave SMS-250 system.
See Figure 6 for the location of the cable-termination
area.
Battery Connection
STEP 7. The battery must be supplied with an adequate
protection fuse and a disconnect breaker. The
battery-protection fuse must be sized correctly for
the short-circuit current capacity of the battery.
The battery supplier shall include the BATTERY
DISCONNECT switch in the battery module.
NOTICE
DC protection must be supplied at the battery
branch level in the battery cabinet.
Terminate the dc cables from the separate
battery pack (if supplied) to the dc inputs in the
cable-termination area. The positive terminal of
the battery must connect to the positive terminal
on the PureWave SMS-250 system. The negative
terminal of the battery must connect to the negative
terminal on the PureWave SMS-250 system.
Note that battery voltage is oating from the
earth reference. The battery enclosure must be
bonded as indicated in the Earth Reference and
Bonding section on page 16.
Power Connections
Terminate the ac cables to the line inputs (L1, L2, and L3)
in the cable-termination area. The ac output of the SMS-250
(neutral) is not bonded to ground.
The input and output circuits are isolated from the enclo-
sure. System grounding, when required by Sections 690.41,
690.42, and 690.43 of the National Electric Code, ANSI/NFPA
70, or the Canadian Electrical Code Part 1, is the responsibil-
ity of the installer.
The SMS-250 is non-isolated; there is no galvanic isolation
provided inside the equipment between the dc input and the
ac output.
Wiring
Use 75°C (167°F) wire either two each No. 4/0 AWG copper or
two each 300-kcmil aluminum wire per terminal or equivalent.
For installations in the U.S., all wiring methods must be
in accordance with the National Electrical Code and ANSI/
NFPA 70.
For installations in Canada, all wiring methods must be
in accordance with the Canadian Electrical Code, Part 1.
Figure 6. Location of the cable-termination area.

14 S&C Instruction Sheet 659-555
Installation, Assembly, and Setup
Lugs for Battery and Power Connections
Use the following recommended lugs or equivalent:
• Panduit LCA4/0-12-X (COPPER)
• T&B CTL40L-12 (COPPER)
Metering Current Transformers
External metering current transformers (CTs) can be
connected at the terminal blocks located on the left side of
the cable termination area.
External CTs must be 5A output and the ratio is settable
in the HMI. The terminal blocks for the CTs are labeled CT
A, CT B, and CT C corresponding to each of the phases.
Earth Reference and Bonding
Earth Reference Requirements
A low-impedance earth reference connection is required for the
PureWave SMS-250 equipment. The earth (ground) reference
system should be tailored to reect the characteristics of
the site and the requirements of the facility and shall use a
grounding interface that meets the needs of the local electric
utility’s system and that complies with all applicable national
and local electrical codes and standards. The PureWave
SMS-250 unit uses power converters that switch at frequencies
up to 5 kHz. For S&C PureWave SMS-250 equipment and
systems rated less than 1000 kVA, the resistance of the
PureWave SMS-250 earth reference connection to earth is
required to be 25 ohms or less at both the nominal power
frequency of 50 or 60 Hz and at the 5-kHz switching frequency
of the PureWave SMS-250 power conversion system.
Any associated battery equipment must have its own direct
earth reference connection. It is not permitted to only ground
the battery equipment through the PureWave SMS-250 earth
reference connections.
Bonding Requirements
Besides the importance of creating an earth reference, bonding
is required between interconnected electrical equipment to
establish a low impedance path that minimizes the potential
difference between two metallic objects, minimizes electric
shock hazards, provides lightning protection, and establishes
references for electronic signals.
All cable tray, conduit, and raceway systems installed to
interconnect power, control, and communications wiring to
and from the PureWave SMS-250 unit shall be electrically
continuous by bonding together at each individual section.
Each individual cable tray, conduit, and raceway section,
including pull boxes, junction boxes, and outlet boxes, shall
be bonded to the facility earthing system within 2 feet
(610 mm) of each end and at intervals not exceeding 50 feet
Figure 7. Example of a ground-plan diagram showing the S&C
PureWave SMS-250 cabinet, the SMS-250 autotransformer
option, and a battery system.
Figure 8. Example of a ground-plan diagram showing two S&C
PureWave SMS-250 cabinets and a pad-mount isolation trans-
former (var-only application—no battery system).
AUTO
TRANSFORMER
OPTION
BATTERY
SYSTEM
SMS-250 MINIMUM 72”
CLEARANCE
TO BATTERY
LEGEND
GROUND CONDUCTOR #4/0 AWG BARE 7
STRAND COPPER
10 FT. (3048 MM) CU CLAD STEEL,
5/8 (16 MM) INCH DIA
#1 AWG CU TO #4/0 AWG CU EXOTHERMIC
CONN. OR APPROVED LISTED SWAGE
CONNECTION
TERMINATION TO GROUND CONDUCTOR
(1 AWG MINIMUM) BARE COPPER, 10 MM
THREADED STUD, SINGLE HOLE, LISTED
SWAGE LUG
GROUND CONDUCTOR TO SMS-250
EQUIPMENT (#1 AWG MINIMUM) BARE 7
STRAND COPPER
GROUND CONDUCTOR #4/0 AWG BARE 7
STRAND COPPER
10 FT. (3048 MM) CU CLAD STEEL,
5/8 (16 MM) INCH DIA
NEMA TWO HOLE PAD OR GROUND CLAMP
TO #4/0 CU CONNECTOR
#4/0 AWG CU TO #4/0 AWG CU
EXOTHERMIC CONN. OR APPROVED
LISTED SWAGE CONNECTION
PAD MOUNT
TRANSFORMER
SMS-250 SMS-250
LEGEND
#1 AWG CU TO #4/0 AWG CU EXOTHERMIC
CONNECTION OR APPROVED LISTED
SWAGE CONNECTION
TERMINATION TO GROUND CONDUCTOR
(1 AWG MINIMUM) BARE COPPER, 10 MM
THREADED STUD, SINGLE HOLE, LISTED
SWAGE LUG
GROUND CONDUCTOR TO SMS-250
EQUIPMENT (#1 AWG MINIMUM) BARE 7
STRAND COPPER
(15 meters) along the run. All cable trays, conduits, and
raceways shall be securely bonded to all brackets, hangers,
and structural members to which they are attached. The
resistance of each bonding connection shall not exceed
5 milliohms. The total bonding resistance between the
PureWave SMS-250 cabinet and any battery cabinet/enclosure
shall be no more than 1 ohm.

S&C Instruction Sheet 659-555 15
Communications Signal
Reference Requirements
All communications systems that interface with the PureWave
SMS-250 equipment must be designed for operation in a
multipoint earth (ground) reference system.
See examples of ground plan diagrams in Figures 7 and 8.
Control and Grounding Connections
For control and grounding connections:
STEP 8. Install control and communication cabling using
the entry location in the cable termination area.
STEP 9. Attach the ground bus of the PCS to the system
groundin accordancewith the installation drawing.
STEP 10.Seal the conduits with duct-sealing compound to
prevent water from entering the system through the
conduits.
Connection Checks
Check all field-installed cables and wiring to the power
conversion system by performing a “point-to-point” check
on all of the wiring to verify the system is wired, labeled,
and terminated per drawing PEA-1610-4-IN and any project-
specific drawings supplied with the PureWave SMS-250
system. Note any problems found and corrective actions
applied.
Torques
Check all factory and eld-bolted electrical connections
inside the PCS enclosure and verify they are torqued to the
proper tightness. See Table 4 for torque requirements.
Base Covers
Install the base covers (if not already installed) at the front
and back forklift entries of the enclosure. They are typically
stored on the inside of the enclosure door. See Figure 9.
Table 4. Torque Requirements
Assembly Part Hardware Tool Torque
(N-M)
Torque
(FT-LBS)
Dead-front
access
panels
Panels
M8
serrated
flange
13 mm
Socket 13.6 10.0
EMI fastners M5x12
screw
#2
Phillips 3.9 2.9
Bus
connections N/A
M10
flange
nut/bolt
15 mm
Socket 54.2 40.0
Islanding
tray
Tray
M8
serrated
flange
13 mm
Socket 13.6 10.0
CT terminal
block
#10-32
Terminals
Slot
Driver 2.0 1. 5
Terminal
blocks
M4
terminals
Slot
Driver 1. 7 1.25
Programmable
logic
controller
M3
mounting
#1
Phillips 1. 1 0.8
Figure 9. Location of base covers.
Base covers
Base cover
storage location
Installation, Assembly, and Setup

16 S&C Instruction Sheet 659-555
Before Completing the Installation
Follow these steps before completing installation:
STEP 1. Replace and secure the dead-front access panels.
STEP 2. Close and lock the door of the PCS enclosure(s).
STEP 3. Wipe down the exterior of the PCS enclosure(s)
with a clean damp cloth. Renish any scratches or
abrasions.
STEP 4. When application of touch-up paint is necessary,
the area to be touched up should be cleaned to
remove all oil and grease. Sand the area, removing
any traces of rust that may be present, and make
sure all edges are feathered before applying primer.
Pre-Startup Checklist
The pre-startup checklist will be provided and should be
reviewed and lled out by the installing contractor. The
document must be signed and faxed to S&C Electric Company
at [phone].
Annual Inspections
After the PureWave SMS-250 system is commissioned and
the unit is online, inspection and maintenance should be
scheduled for the PCS on an annual basis to ensure the
proper operation of the system. Schedules for maintenance
should be reviewed by the customer based upon the given site
conditions and, if required, the frequency of the recommended
maintenance should increase to ensure the reliability of the
PureWave SMS-250 system.
Inspection Recommendations