Automationdirect.com Stellar SR44 User manual

STELLAR™ SR44 SOFT STARTER USER MANUAL
SR44-M-WO
1st Edition, Revision B

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SR44 Series Soft Starter User Manual 1st Ed, Rev B 07/31/2019

~ WARNING ~
Thank you for purchasing automation equipment from Automationdirect.com®, doing business as
AutomationDirect. We want your new automation equipment to operate safely. Anyone who installs or uses
this equipment should read this publication (and any other relevant publications) before installing or operating
the equipment.
To minimize the risk of potential safety problems, you should follow all applicable local and national codes
that regulate the installation and operation of your equipment. These codes vary from area to area and usually
change with time. It is your responsibility to determine which codes should be followed, and to verify that the
equipment, installation, and operation is in compliance with the latest revision of these codes.
At a minimum, you should follow all applicable sections of the National Fire Code, National Electrical Code,
and the codes of the National Electrical Manufacturer's Association (NEMA). There may be local regulatory or
government offices that can also help determine which codes and standards are necessary for safe installation
and operation.
Equipment damage or serious injury to personnel can result from the failure to follow all applicable codes and
standards. We do not guarantee the products described in this publication are suitable for your particular
application, nor do we assume any responsibility for your product design, installation, or operation.
Our products are not fault-tolerant and are not designed, manufactured or intended for use or resale as on-line
control equipment in hazardous environments requiring fail-safe performance, such as in the operation of
nuclear facilities, aircraft navigation or communication systems, air traffic control, direct life support machines,
or weapons systems, in which the failure of the product could lead directly to death, personal injury, or severe
physical or environmental damage ("High Risk Activities"). AutomationDirect specifically disclaims any
expressed or implied warranty of fitness for High Risk Activities.
For additional warranty and safety information, see the Terms and Conditions section of our online catalog. If
you have any questions concerning the installation or operation of this equipment, or if you need additional
information, please call us at 770-844-4200.
This publication is based on information that was available at the time it was printed. At AutomationDirect we
constantly strive to improve our products and services, so we reserve the right to make changes to the products
and/or publications at any time without notice and without any obligation. This publication may also discuss
features that may not be available in certain revisions of the product.
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and company names may be trademarked and are the sole property of their respective owners.
AutomationDirect disclaims any proprietary interest in the marks and names of others.
Copyright 2011, 2019 Automationdirect.com® Incorporated
A Rights Reserved
No part of this manual shall be copied, reproduced, or transmitted in any way without the prior, written
consent of Automationdirect.com® Incorporated. AutomationDirect retains the exclusive rights to all
information included in this document.
SR44 Series Soft Starter User Manua
1st Ed, Rev B 07/31/2019 w–1

~ AVERTISSEMENT ~
Nous vous remercions d'avoir acheté l'équipement d'automatisation de Automationdirect.com®, en faisant des
affaires comme AutomationDirect. Nous tenons à ce que votre nouvel équipement d'automatisation
fonctionne en toute sécurité. Toute personne qui installe ou utilise cet équipement doit lire la présente
publication (et toutes les autres publications pertinentes) avant de l'installer ou de l'utiliser.
Afin de réduire au minimum le risque d'éventuels problèmes de sécurité, vous devez respecter tous les codes
locaux et nationaux applicables régissant l'installation et le fonctionnement de votre équipement. Ces codes
diffèrent d'une région à l'autre et, habituellement, évoluent au fil du temps. Il vous incombe de déterminer les
codes à respecter et de vous assurer que l'équipement, l'installation et le fonctionnement sont conformes aux
exigences de la version la plus récente de ces codes.
ous devez, à tout le moins, respecter toutes les sections applicables du Code national de prévention des
incendies, du Code national de l'électricité et des codes de la National Electrical Manufacturer's Association
(NEMA). Des organismes de réglementation ou des services gouvernementaux locaux peuvent également vous
aider à déterminer les codes ainsi que les normes à respecter pour assurer une installation et un
fonctionnement sûrs.
L'omission de respecter la totalité des codes et des normes applicables peut entraîner des dommages à
l'équipement ou causer de graves blessures au personnel. Nous ne garantissons pas que les produits décrits
dans cette publication conviennent à votre application particulière et nous n'assumons aucune responsabilité à
l'égard de la conception, de l'installation ou du fonctionnement de votre produit.
Nos produits ne sont pas insensibles aux défaillances et ne sont ni conçus ni fabriqués pour l'utilisation ou la
revente en tant qu'équipement de commande en ligne dans des environnements dangereux nécessitant une
sécurité absolue, par exemple, l'exploitation d'installations nucléaires, les systèmes de navigation aérienne ou
de communication, le contrôle de la circulation aérienne, les équipements de survie ou les systèmes d'armes,
pour lesquels la défaillance du produit peut provoquer la mort, des blessures corporelles ou de graves
dommages matériels ou environnementaux («activités à risque élevé»). La société AutomationDirect nie toute
garantie expresse ou implicite d'aptitude à l'emploi en ce qui a trait aux activités à risque élevé.
Pour des renseignements additionnels touchant la garantie et la sécurité, veuillez consulter la section
Modalités et conditions de notre documentation. Si vous avez des questions au sujet de l'installation ou du
fonctionnement de cet équipement, ou encore si vous avez besoin de renseignements supplémentaires,
n'hésitez pas à nous téléphoner au 770-844-4200.
Cette publication s'appuie sur l'information qui était disponible au moment de l'impression. À la société
AutomationDirect, nous nous efforçons constamment d'améliorer nos produits et services. C'est pourquoi
nous nous réservons le droit d'apporter des modifications aux produits ou aux publications en tout temps, sans
préavis ni quelque obligation que ce soit. La présente publication peut aussi porter sur des caractéristiques
susceptibles de ne pas être offertes dans certaines versions révisées du produit.
Marques de commerce
La présente publication peut contenir des références à des produits fabriqués ou offerts par d'autres
entreprises. Les désignations des produits et des entreprises peuvent être des marques de commerce et
appartiennent exclusivement à leurs propriétaires respectifs. AutomationDirect nie tout intérêt dans les autres
marques et désignations.
Copyright 2011, 2019 Automationdirect.com® Incorporated
Tous droits réservés
Nulle partie de ce manuel ne doit être copiée, reproduite ou transmise de quelque façon que ce soit sans le
consentement préalable écrit de la société Automationdirect.com® Incorporated. AutomationDirect conserve
les droits exclusifs à l'égard de tous les renseignements contenus dans le présent document.
SR44 Series Soft Starter User Manua 1st Ed, Rev B 07/31/2019
w–2

~ WARNING ~
WARNING: There are hi hly sensitive electronic components on the printed circuit boards, and these
components are especially sensitive to static electricity. To avoid dama e to these components, do not
touch these components or the circuit boards with metal objects or your bare hands.
WARNING:Ground the SR44 soft starter usin the round terminal. The roundin method must comply
with the laws of the country where the SR44 is to be installed. Refer to Chapter 2, “Electrical
Installation”.
WARNING: The SR44 may be destroyed beyond repair if incorrect cables are connected to the
input/output terminals. Never connect the SR44 output terminals T1, T2, and T3 directly to the AC main
circuit power supply.
WARNING: Always replace the cover panel on the unit after ainin access to the electrical connections.
WARNING: The SR44 uses semiconductor devices in the main (power) circuit, and is not desi ned to
provide isolation. For this reason, isolation device(s) must be installed in the power supply circuit in
accordance with the applicable wirin and safety re ulations.
The owner, installer, and user are responsible for the correct installation and use of the Stellar™ SR44,
for ensurin that only qualified personnel install the SR44, and for ensurin that the operation and
maintenance of the unit complies with the relevant Codes of Practice, Re ulations, and Statutory
Requirements. The manufacturer or his a ent do not assume any expressed or implied liability for any
consequences resultin from inappropriate, ne li ent, or incorrect installation, application, use, or
adjustment of the product or circuit desi n, or from the mismatch of the unit to a motor. To prevent an
electrical shock hazard, the SR44 must be properly rounded. The SR44 is not desi ned for use in
hazardous areas. Use in such an area may invalidate the hazardous area certification.
WARNING: AC input power must be disconnected before performin any maintenance. Do not connect
or disconnect wires or connectors while power is applied to the circuit. Maintenance must be
performed only by a qualified technician.
WARNING: Read this manual thorou hly before usin Stellar™ SR44 Series Soft Starters.
SR44 Series Soft Starter User Manua
1st Ed, Rev B 07/31/2019 w–3

SR44 Series Soft Starter User Manua 1st Ed, Rev B 07/31/2019
w–4
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Ple se include the M nu l Number nd the M nu l Issue, both shown below, when communic ting with
Technic l Support reg rding this public tion.
M nu l Number: SR44-M-WO
Issue: First Edition, Revision B
Issue D te: 07/31/2019
STELLAR™
SR44 SOFT STARTER
USER MANUAL
Public tion History
Issue D te Description of Ch nges
First Edition 01/2011 Original Issue
1st Ed, ev A 09/2011
Ch2: Bypass Control & external CT (2.4.1 & 2.5.2); Fuse and Current atings (2.10.1 & 2.10.2).
Ch5: Modified parameter explanations, especially with regard to Auto Jog, Optimise +, bypass
operation, and current-related features.
1st Ed, ev B 07/31/2019
Throughout: Discontinued note for S 44 soft starters
Ch2: Wiring diagram notes for 3Ø power and load; Fuse table for UL applications.
Ch5: Modified P-72, P-127 explanations
NOTE: SR44 soft starters have been discontinued. Please consider SR55 soft starters as a replacements.

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SR44 Series Soft St rter User M nu l 1st Ed, ev B 07/31/2019

Chapter 1: Mechanical Installation . . . . . . . . . . . . . . . . . . . . . 1–1
Manual Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
1 – Mechanical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3
Chapter 2: Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . 2–1
2.1 – Warnings & Agency Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . .2–2
2.2 – Electrical Connections - Specifications . . . . . . . . . . . . . . . . . . . . . . 2–3
2.3 – Standard Wiring Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . .2–4
2.4 – Motor Control Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2–6
2.5 – Electrical Connections - Terminal Locations . . . . . . . . . . . . . . . . . . 2–9
2.6 – ower Supply Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–12
2.7 – Control Card Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–13
2.8 – (Reserved for Future Use) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2–13
2.9 – Typical Motor ower at Rated Voltage . . . . . . . . . . . . . . . . . . . . . 2–14
2.10 – Fuse and Current Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2–15
Chapter 3: Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3–1
3.1 – Motor Suitability and Associated Considerations . . . . . . . . . . . . . . 3–2
3.2 – Rules for Specific Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–5
3.3 – Concepts and rinciples of Fixed-Speed Induction Motor Starting
and Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–8
3.4 – rinciples of the Optimizing Mode . . . . . . . . . . . . . . . . . . . . . . . 3–15
3.5 – Chapter 3 Glossary of Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–20
3.6 – ower Factor Conversion Chart . . . . . . . . . . . . . . . . . . . . . . . . . . 3–21
STELLAR™ SR44 SOFT
STARTER USER MANUAL
TABLE OF CONTENTS

Table of Contents
Chapter 4: Electromagnetic Compatibility . . . . . . . . . . . . . . . .4–1
4.0 – Electromagnetic Compatibility (EMC) . . . . . . . . . . . . . . . . . . . . . . 4–2
4.1 – Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4–2
4.2 – Applicable Standard Within the EU . . . . . . . . . . . . . . . . . . . . . . . . 4–2
4.3 – Mandatory Requirements Within the EU . . . . . . . . . . . . . . . . . . . . 4–2
4.4 – Guidance for Installation ersonnel and System Designers . . . . . . .4–2
4.5 – EMC Basic Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3
4.6 – urchasing Implications of Meeting an EMC Standard . . . . . . . . . .4–3
4.7 – Basic EMC Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–4
Chapter 5: Keypad Menu Items and arameters . . . . . . . . . . . 5–1
5.0 – How to Use This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5–2
5.1 – Configuring the SR44 Soft Starter . . . . . . . . . . . . . . . . . . . . . . . . . 5–3
5.2 – Keypad Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–8
5.3 – arameter Basic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–15
5.4 – Menu Settings and arameter Descriptions . . . . . . . . . . . . . . . . . 5–23
5.5 – Definitions for Chapter 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–79
Chapter 6: Serial Communications . . . . . . . . . . . . . . . . . . . . . 6–1
6.1 – Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2
6.2 – Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6–2
6.3 – Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6–3
6.4 – arameter Memory Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–4
6.5 – Serial Communication to SR44 . . . . . . . . . . . . . . . . . . . . . . . . . . 6–13
6.7 – Example LC Communications rograms . . . . . . . . . . . . . . . . . . .6–19
Chapter 7: Optional Hardware . . . . . . . . . . . . . . . . . . . . . . . . 7–1
7.1 – SR44-RS485 Communication Card . . . . . . . . . . . . . . . . . . . . . . . . .7–2
7.2 – SR44-K D Remote Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7–4
Appendix A: Setup Examples . . . . . . . . . . . . . . . . . . . . . . . . . A–1
A.1 – Setup Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–2
A.2 – Advanced Setup Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A–19
Appendix B: Applications Data . . . . . . . . . . . . . . . . . . . . . . . . B–1
SR44 Applications Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B–2
SR44 Series Soft Starter User Manual 1st Ed, Rev B 07/31/2019
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t–3
Appendix C: Technical Hints . . . . . . . . . . . . . . . . . . . . . . . . . . C–1
Technical Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C–2
Appendix D: Using AutomationDirect LCs
with SR44 Soft Starters . . . . . . . . . . . . . . . . . . . .D–1
Compatibility Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D–2
CLICK LC I/O Compatible with SR44 Soft Starters . . . . . . . . . . . . . . . . D–2
DL05/DL06 LC I/O Compatible with SR44 Soft Starters . . . . . . . . . . . . D–3
DL105 LC I/O Compatible with SR44 Soft Starters . . . . . . . . . . . . . . . . D–4
DL205 LC I/O Compatible with SR44 Soft Starters . . . . . . . . . . . . . . . . D–4
DL305 LC I/O Compatible with SR44 Soft Starters . . . . . . . . . . . . . . . . D–5
DL405 LC I/O Compatible with SR44 Soft Starters . . . . . . . . . . . . . . . . D–6
3000 LC I/O Compatible with SR44 Soft Starters . . . . . . . . . . . . . . . . D–6
Terminator I/O Compatible with SR44 Soft Starters . . . . . . . . . . . . . . . . D–7
Table of Contents
SR44 Series Soft Starter User Manual
1st Ed, Rev B 07/31/2019

Table of Contents
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SR44 Series Soft Starter User Manual 1st Ed, Rev B 07/31/2019
t–4

MECHANICAL
INSTALLATI N 1
CHAPTER
CHAPTER
1
1
CHAPTER
Contents of this Chapter...
Manual Ov rvi w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
Ov rvi w of this Publication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
Who Should R ad This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
Suppl m ntal Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
T chnical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
Sp cial Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
1 – M chanical Installation . . . . . . . . . . . . . . . . . . . . . . . . . 1–3
1.1 – Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3
1.2 – R quir m nts for an Enclosur . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1–3
1.3 – V ntilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3
1.4 – Storag and D rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1–3
1.5 – Altitud . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3
1.6 – Assist d Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–4
1.7 – H at Output of Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–4
1.8 – Cl aranc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1–5
1.9 – M chanical Outlin – Chassis Siz 1 . . . . . . . . . . . . . . . . . . . . . . . . . . .1–6
1.10 – M chanical Outlin – Chassis Siz 2 . . . . . . . . . . . . . . . . . . . . . . . . . .1–7
NOTE: SR44 soft starters have been discontin ed. Please consider SR55 soft starters as a replacements.

Chapter 1: Mechanical Installation
Manual verview
verview of this Publication
The SR44 Soft Starter User Manual describes the installation, configuration, and methods of
operation of the SR44 Soft Starter.
Who Should Read This Manual
This manual contains important information for those who will install, maintain, and/or operate
any of the SR44 Soft Starters.
Supplemental Publications
The National Electrical Manufacturers Association (NEMA) publishes many different documents
that discuss standards for industrial control equipment. Global Engineering Documents handles
the sale of NEMA documents. For more information, you can contact Global Engineering
Documents at:
15 Inverness Way East
Englewood, CO 80112-5776
1-800-854-7179 (within the U. .)
303-397-7956 (international)
www.global.ihs.com
Technical Support
By Telephone: [phone]
(Mon.–Fri., 9:00 a.m.–6:00 p.m. E.T.)
On the Web: www.automationdirect.com
Our technical support group is glad to work with you in answering your questions. If you cannot
find the solution to your particular application, or, if for any reason you need additional technical
assistance, please call technical support at 770-844-4200. We are available weekdays from 9:00
a.m. to 6:00 p.m. Eastern Time.
We also encourage you to visit our web site where you can find technical and non-technical
information about our products and our company. Visit us at www.automationdirect.com.
Special Symbols
NOTE: SR44 soft starters have been discontin ed. Please consider SR55 soft starters as a replacements.
When yo see the “notepad” icon in the left-hand margin, the paragraph to its immediate right will be a
special note.
When you see the “exclamation mark” icon in the left-hand margin, the paragraph to its immediate right
will be a WARNING. This information could prevent injury, loss of property, or even death (in extreme
cases).
SR44 Series Soft Starter User Manual 1st Ed, Rev B 07/31/2019
1–2

1–3
1 – Mechanical Installation
1.1 – Mounting
Mount the unit to a flat, vertical surface using the mounting holes (or slots) on its base-plate. The
mechanical outline diagrams, shown in the “Mechanical Outline” section (1.9), give the
dimensions and mounting hole positions for each model. Ensure that:
• The orientation of the unit has the “TOP” uppermost .
• The location allows adequate front access.
• You can view the alphanumeric display.
1.2 – Requirements for an Enclosure
For a typical industrial environment, an enclosure should provide the following:
• A single location for the unit and its protection/isolation switch-gear.
• The safe termination of cabling and/or bus-bars.
• Means to effect proper air flow through the enclosure.
1.3 – Ventilation
The installer must ensure that the enclosure can maintain the operating temperature below 40 ºC
(104 ºF), or with derating 60 ºC (140 ºF). To ensure that the unit operates within a suitable
temperature range, periodically measure the internal temperature of the enclosure. If you situate
the unit above equipment that generates a significant amount of heat, reduce the unit full load
rating.
1.4 – Storage and Derating
Above 40 ºC (104ºF), derate linearly by 2% of unit F C / ºC to maximum of 40% at 60 ºC (140ºF).
1.5 – Altitude
Humidity
Max. 85% non-condensing, not exceeding 50% at 40 °C [104 °F]
Temperature Minimum Maximum
Storage, continuous -25 ºC [-13 ºF] +60 ºC [140 ºF]
Storage, not exceeding 24 hours -25 ºC [-13 ºF] +75 ºC [167 ºF]
perating (without derating) * 0 ºC [32 ºF] +40 ºC [104 ºF]
perating (with maximum derating) * 0 ºC [32 ºF] +60 ºC [140 ºF]
* Above 40 ºC (104ºF), der te line rly by 2% of unit FLC / ºC to m ximum of 40% t 60 ºC
(140ºF). [Unit FLC = Soft St rter r ted Full Lo d Current; NOT motor Full Lo d Current.]
Condition Maximum Height Above Sea Level
perating (without derating) 1000m [3281 ft]
perating (with maximum derating) 2000m [6562 ft]
Der ting: Above 1000m (3281 ft), der te line rly by 1% Unit FLC per 100m
to m ximum of 2000m (6562 ft).
Chapter 1: Mechanical Installation
SR44 Series Soft Starter User Manual
1st Ed, Rev B 07/31/2019

Chapter 1: Mechanical Installation
1.6 – Assisted Flow
An enclosure may need additional fans to maintain the required air temperature immediately
surrounding the unit. This temperature is referred to as the Ambient Temperature. Use the
following formula to determine whether or not fan(s) are required. An allowance has been
incorporated into the formula so that the figure for “Q” should be the air delivery quoted in the fan
supplier’s data.
Q = (4 x Wt) / (tmax – tamb)
• Q = required volume of air in cubic meters per hour (m3/h)
• Wt = heat produced by the unit and all other heat sources within the enclosure in Watts (W)
• tmax = maximum permissible temperature within the enclosure (ºC)
• tamb = temperature of the air entering the enclosure (ºC)
(If you prefer to work in CFM, substitute ºF for ºC.)
Refer to the table in section 1.7 for the heat produced by the SR44, and note that the heat figure
(Wt) is the total heat produced by everything within the enclosure.
1.7 – Heat utput of Units
[At rated operational current, Ie, unit Full oad Current (F C).]
SR44 Approximate Heat utput (non-bypass)
Chassis Size 1 Chassis Size 2
Model # Heat utput (W) Model # Heat utput (W)
SR44-9 30 SR44-174 520
SR44-16 45 SR44-202 610
SR44-23 60 SR44-242 650
SR44-30 90 SR44-300 850
SR44-44 120 SR44-370 970
SR44-59 155
SR44-72 210
SR44-85 220
SR44-105 275
SR44-146 440
SR44 Series Soft Starter User Manual 1st Ed, Rev B 07/31/2019
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1.8 – Clearance
To maintain adequate ventilation, each model of SR44 Soft Starter requires a minimum clearance
to adjacent equipment and partitions. These clearances are specified in the following diagram and
table.
S
T
B
F
Soft
Starter
Soft
Starter
Unit Air
Intake
Mounting
Surface
Outline of
Enclosure
S
Minimum Clearance for Heat Dissipation
SR44 Mounting Clearances
Model Number Unit Cooling
Method
Minimum Clearance (mm [in])
Top (T) Bottom (B) Side (S) Front (F)
SR44-9 to SR44-23 Natural Convection
75 [2.95] 75 [2.95] 15 [0.59] 25 [0.98]
SR44-30 to SR44-370
Forced Air with
internal cooling fan
inside each starter
Chapter 1: Mechanical Installation
SR44 Series Soft Starter User Manual
1st Ed, Rev B 07/31/2019

Chapter 1: Mechanical Installation
1.9 – Mechanical utline – Chassis Size 1
SR44-9 to SR44-146
SR44 size 1: SR44-9 to SR44-146
dimensions: mm [in]
380.0 [14.96]
415.0 [16.34]
400.0 [15.75]
362.0 [14.25]
125.0 [4.92]
222.0 [8.74]
150.0 [5.91]
195.0 [7.68]
SR44 Chassis Size 1 Mounting Specifications
Model Number Mass/Weight
(kg [lb])
Unit Mounting Holes
Top Bottom
SR44-9 to SR44-44 7.3 [16] (2) holes & (2) slots
suitable for M6 or 1/4” fittings
(2) holes & (2) slots
suitable for M6 or 1/4” fittings
SR44-59 to SR44-146 8.3 [18]
SR44 Series Soft Starter User Manual 1st Ed, Rev B 07/31/2019
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1.10 – Mechanical utline – Chassis Size 2
SR44-174 to SR44-370
SR44 size 2: SR44-174 to SR44-370
dimensions: mm [in]
Mounting Holes/Slots
520.0
[20.47]
340.0
[13.39]
250.0
[9.84]
500.0
[19.69]
265.0
[10.43]
SR44 Chassis Size 2 Mounting Specifications
Model Number Mass/Weight
(kg [lb])
Unit Mounting Holes
Top Bottom
SR44-174 to SR44-202 16 [35] (2) keyholes
suitable for M6 or 1/4” fittings
(2) open slots
suitable for M6 or 1/4” fittings
SR44-242 to SR44-370 22 [49]
Chapter 1: Mechanical Installation
SR44 Series Soft Starter User Manual
1st Ed, Rev B 07/31/2019

Chapter 1: Mechanical Installation
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SR44 Series Soft Starter User Manual 1st Ed, Rev B 07/31/2019
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