Thermal Dynamics CE PAK Master 75XL User manual

September 25, 2001 Manual No. 0-2607
Operating Manual
PLASMA CUTTING
POWER SUPPLY
CE PAK Master®75XL
A-00909

Record the following information for Warranty purposes:
Where Purchased: _______________________________________
Purchase Date: _______________________________________
Power Supply Serial #: _______________________________________
Torch Serial #: _______________________________________
WARNINGS
Read and understand this entire Manual and your employer’s safety practices before installing, oper-
ating, or servicing the equipment.
While the information contained in this Manual represents the Manufacturer's best judgement, the
Manufacturer assumes no liability for its use.
Plasma Cutting Power Supply
CE PAK Master®75XL
Operating Manual Number 0-2607
Published by:
Thermal Dynamics Corporation
Industrial Park No. 2
West Lebanon, New Hampshire, USA 03784
[phone]
Copyright 1997 by
Thermal Dynamics Corporation
All rights reserved.
Reproduction of this work, in whole or in part, without written per-
mission of the publisher is prohibited.
The publisher does not assume and hereby disclaims any liability to
any party for any loss or damage caused by any error or omission in
this Manual, whether such error results from negligence, accident, or
any other cause.
Printed in the United States of America
Publication Date: September 25, 2001

TABLE OF CONTENTS
SECTION 1:
GENERAL INFORMATION .................................................................................................. 1
1.01 Notes, Cautions andWarnings ........................................................................ 1
1.02 Important Safety Precautions .......................................................................... 1
1.03 Publications..................................................................................................... 2
1.04 Note, Attention et Avertissement ..................................................................... 3
1.05 Precautions De Securite Importantes.............................................................. 3
1.06 Documents De Reference ............................................................................... 5
1.07 Declaration of Conformity................................................................................ 7
1.08 Statement ofWarranty..................................................................................... 8
SECTION 2:
INTRODUCTION ................................................................................................................. 9
2.01 Scope of Manual ............................................................................................ 9
2.02 General Description........................................................................................ 9
2.03 Specifications/Design Features ...................................................................... 9
2.04 Power Supply Options and Accessories ....................................................... 10
SECTION 3:
INSTALLATION PROCEDURES ........................................................................................ 11
3.01 Introduction .................................................................................................. 11
3.02 Site Selection ............................................................................................... 11
3.03 Unpacking .................................................................................................... 11
3.04 Lifting Options .............................................................................................. 12
3.05 Input Power Connections.............................................................................. 12
3.06 InputVoltage Selection ................................................................................. 12
3.07 Input Power Cable Connections ................................................................... 13
3.08 Gas Connections.......................................................................................... 13
3.09 ConnectingTorch Leads ............................................................................... 15
3.10 Work Cable And Ground Connections .......................................................... 16
SECTION 4:
OPERATION ...................................................................................................................... 17
4.01 Introduction .................................................................................................. 17
4.02 Functional Overview..................................................................................... 17
4.03 Operating Controls ....................................................................................... 17
4.04 Sequence Of Operation................................................................................ 19
4.05 Preparations for Operating ........................................................................... 20
4.06 Cut Quality ................................................................................................... 20
SECTION 5:
CUSTOMER/OPERATOR SERVICE.................................................................................. 23
5.01 Introduction .................................................................................................. 23
5.02 General Maintenance ................................................................................... 23
5.03 Common Operating Problems ...................................................................... 23
5.04 Troubleshooting Guide.................................................................................. 24
5.05 Power Supply Parts Replacement ................................................................ 26

TABLE OF CONTENTS (continued)
SECTION 6:
PARTS LISTS.....................................................................................................................29
6.01 Introduction .................................................................................................. 29
6.02 Ordering Information .................................................................................... 29
6.03 Complete Power Supply Replacement ......................................................... 30
6.04 Options and Accessories.............................................................................. 30
APPENDIX I: INPUT WIRING REQUIREMENTS ...................................................................... 31
APPENDIX II: SEQUENCE OF OPERATION (BLOCK DIAGRAM) ........................................... 32
APPENDIX III: SYSTEM SCHEMATIC....................................................................................... 34

Date: August 6, 2001 1 GENERAL INFORMATION
SECTION 1:
GENERAL INFORMATION
1.01 Notes, Cautions and Warnings
Throughout this manual, notes, cautions, and warnings
areused tohighlight importantinformation. These high-
lights are categorized as follows:
NOTE
An operation, procedure, or background informa-
tion which requires additional emphasis or is help-
ful in efficient operation of the system.
CAUTION
A procedure which, if not properly followed, may
cause damage to the equipment.
WARNING
A procedure which, if not properly followed, may
cause injury to the operator or others in the oper-
ating area.
1.02 Important Safety Precautions
WARNINGS
OPERATION AND MAINTENANCE OF
PLASMA ARC EQUIPMENT CAN BE DAN-
GEROUS AND HAZARDOUS TO YOUR
HEALTH.
Plasma arc cutting produces intense electric and
magnetic emissions that may interfere with the
proper function of cardiac pacemakers, hearing
aids, or other electronic health equipment. Per-
sons who work near plasma arc cutting applica-
tions should consult their medical health profes-
sional and the manufacturer of the health
equipment to determine whether a hazard exists.
To prevent possible injury, read, understand and
follow all warnings, safety precautions and in-
structionsbefore usingthe equipment. Call1-603-
298-5711 or your local distributor if you have any
questions.
GASES AND FUMES
Gases and fumes produced during the plasma cutting
process can be dangerous and hazardous to your health.
• Keep all fumes and gases from the breathing area.
Keep your head out of the welding fume plume.
• Use an air-supplied respirator if ventilation is not
adequate to remove all fumes and gases.
• The kinds of fumes and gases from the plasma arc
depend on the kind of metal being used, coatings
onthemetal,andthedifferent processes. You must
be very careful when cutting or welding any met-
als which may contain one or more of the follow-
ing:
Antimony Chromium Mercury
Arsenic Cobalt Nickel
Barium Copper Selenium
Beryllium Lead Silver
Cadmium Manganese Vanadium
• Always read the Material Safety Data Sheets
(MSDS) that should be supplied with the material
you are using. These MSDSs will give you the in-
formationregardingthekindandamountof fumes
and gases that may be dangerous to your health.
• For information on how to test for fumes and gases
inyour workplace, refertoitem1 in Subsection1.03,
Publications in this manual.
• Usespecial equipment, such as waterordown draft
cutting tables, to capture fumes and gases.
• Do not use the plasma torch in an area where com-
bustible or explosive gases or materials are located.
• Phosgene, a toxic gas, is generated from the vapors
of chlorinated solvents and cleansers. Remove all
sources of these vapors.
• This product, when used for welding or cutting,
produces fumes or gases which contain chemicals
known to the State of California to cause birth de-
fects and, in some cases, cancer. (California Health
& Safety Code Sec. 25249.5 et seq.)
ELECTRIC SHOCK
Electric Shock can injure or kill. The plasma arc process
uses and produces high voltage electrical energy. This
electric energy can cause severe or fatal shock to the op-
erator or others in the workplace.
• Never touch any parts that are electrically “live”
or “hot.”

GENERAL INFORMATION 2 Date: August 6, 2001
• Wear dry gloves and clothing. Insulate yourself
from the work piece or other parts of the welding
circuit.
• Repair or replace all worn or damaged parts.
• Extra care must be taken when the workplace is
moist or damp.
• Install and maintain equipment according to NEC
code, refer to item 9 in Subsection 1.03, Publica-
tions.
• Disconnect power source before performing any
service or repairs.
• Read and follow all the instructions in the Operat-
ing Manual.
FIRE AND EXPLOSION
Fire and explosion can be caused by hot slag, sparks, or
the plasma arc.
• Be sure there is no combustible or flammable ma-
terial in the workplace. Any material that cannot
be removed must be protected.
• Ventilate all flammable or explosive vapors from
the workplace.
• Do not cut or weld on containers that may have
held combustibles.
• Provideafire watchwhen working inanareawhere
fire hazards may exist.
• Hydrogen gas may be formed and trapped under
aluminum workpieces when they are cut under-
water or while using a water table. DO NOT cut
aluminum alloys underwater or on a water table
unless the hydrogen gas can be eliminated or dis-
sipated. Trapped hydrogen gas that is ignited will
cause an explosion.
NOISE
Noisecancausepermanent hearing loss. Plasma arcpro-
cesses can cause noise levels to exceed safe limits. You
must protect your ears from loud noise to prevent per-
manent loss of hearing.
• To protect your hearing from loud noise, wear pro-
tective ear plugs and/or ear muffs. Protect others
in the workplace.
• Noiselevels should be measuredtobe surethe deci-
bels (sound) do not exceed safe levels.
• For information on how to test for noise, see item 1
in Subsection 1.03, Publications, in this manual.
PLASMAARC RAYS
PlasmaArcRayscan injureyoureyes and burn yourskin.
The plasma arc process produces very bright ultra violet
and infra red light. These arc rays will damage your
eyesand burn your skinifyou arenot properlyprotected.
• To protect your eyes, always wear a welding hel-
metorshield. Alsoalways wear safety glasses with
side shields, goggles or other protective eye wear.
• Wear welding gloves and suitable clothing to pro-
tect your skin from the arc rays and sparks.
• Keep helmet and safety glasses in good condition.
Replace lenses when cracked, chipped or dirty.
• Protect others in the work area from the arc rays.
Use protective booths, screens or shields.
• Use the shade of lens as suggested in the following
per ANSI/ASC Z49.1:
Minimum Protective Suggested
Arc Current Shade No. Shade No.
Less Than 300* 8 9
300 - 400* 9 12
400 - 800* 10 14
* Thesevaluesapply where the actualarcis clearly
seen. Experience has shown that lighter filters
may be used when the arc is hidden by the work-
piece.
1.03 Publications
Refer to the following standards or their latest revisions
for more information:
1. OSHA, SAFETYAND HEALTH STANDARDS, 29CFR
1910, obtainable from the Superintendent of Docu-
ments, U.S. Government Printing Office, Washington,
D.C. 20402
2. ANSI Standard Z49.1, SAFETY IN WELDING AND
CUTTING, obtainable from theAmerican Welding So-
ciety, 550 N.W. LeJeune Rd, Miami, FL 33126
3. NIOSH, SAFETY AND HEALTH IN ARC WELDING
AND GAS WELDING AND CUTTING, obtainable
from the Superintendent of Documents, U.S. Govern-
ment Printing Office, Washington, D.C. 20402
4. ANSI Standard Z87.1, SAFE PRACTICES FOR OCCU-
PATIONAND EDUCATIONALEYEAND FACE PRO-
TECTION, obtainable from American National Stan-
dards Institute, 1430 Broadway, New York, NY 10018
5. ANSI Standard Z41.1, STANDARD FOR MEN’S
SAFETY-TOE FOOTWEAR,obtainable fromtheAmeri-
can National Standards Institute, 1430 Broadway, New
York, NY 10018

Date: August 6, 2001 3 GENERAL INFORMATION
6. ANSI StandardZ49.2,FIRE PREVENTION INTHE USE
OF CUTTING AND WELDING PROCESSES, obtain-
able from American National Standards Institute, 1430
Broadway, New York, NY 10018
7. AWS StandardA6.0, WELDINGAND CUTTING CON-
TAINERS WHICH HAVE HELD COMBUSTIBLES, ob-
tainable from American Welding Society, 550 N.W.
LeJeune Rd, Miami, FL 33126
8. NFPA Standard 51, OXYGEN-FUEL GAS SYSTEMS
FOR WELDING, CUTTING AND ALLIED PRO-
CESSES, obtainable from the National Fire Protection
Association, Batterymarch Park, Quincy, MA 02269
9. NFPA Standard 70, NATIONAL ELECTRICAL CODE,
obtainable from the National Fire Protection Associa-
tion, Batterymarch Park, Quincy, MA 02269
10. NFPAStandard 51B, CUTTINGAND WELDING PRO-
CESSES, obtainable from the National Fire Protection
Association, Batterymarch Park, Quincy, MA 02269
11. CGA Pamphlet P-1, SAFE HANDLING OF COM-
PRESSED GASES IN CYLINDERS, obtainable from the
Compressed Gas Association, 1235 Jefferson Davis
Highway, Suite 501, Arlington, VA 22202
12. CSAStandard W117.2, CODE FOR SAFETY IN WELD-
ING AND CUTTING, obtainable from the Canadian
Standards Association, Standards Sales, 178 Rexdale
Boulevard, Rexdale, Ontario, Canada M9W 1R3
13. NWSA booklet, WELDING SAFETY BIBLIOGRAPHY
obtainable from the National Welding Supply Associa-
tion, 1900 Arch Street, Philadelphia, PA 19103
14. American WeldingSociety StandardAWSF4.1, RECOM-
MENDED SAFE PRACTICES FOR THE PREPARA-
TION FOR WELDINGAND CUTTING OF CONTAIN-
ERSAND PIPING THAT HAVE HELD HAZARDOUS
SUBSTANCES, obtainable from theAmerican Welding
Society, 550 N.W. LeJeune Rd, Miami, FL 33126
15. ANSI Standard Z88.2, PRACTICE FOR RESPIRATORY
PROTECTION, obtainable from American National
Standards Institute, 1430 Broadway, New York, NY
10018
1.04 Note, Attention et
Avertissement
Dans ce manuel, les mots “note,” “attention,” et
“avertissement” sont utilisés pour mettre en relief des
informations à caractère important. Ces mises en relief
sont classifiées comme suit :
NOTE
Toute opération, procédure ou renseignement
général sur lequel il importe d’insister davantage
ou qui contribue à l’efficacité de fonctionnement
du système.
ATTENTION
Toute procédure pouvant résulter
l’endommagement du matériel en cas de non-
respect de la procédure en question.
AVERTISSEMENT
Toute procédure pouvant provoquer des blessures
de l’opérateur ou des autres personnes se trouvant
dans la zone de travail en cas de non-respect de la
procédure en question.
1.05 Precautions De Securite
Importantes
AVERTISSEMENTS
L’OPÉRATION ET LA MAINTENANCE DU
MATÉRIEL DE SOUDAGE À L’ARC AU JET
DE PLASMA PEUVENT PRÉSENTER DES
RISQUES ET DES DANGERS DE SANTÉ.
Coupantà l’arcaujet de plasma produitdel’énergie
électrique haute tension et des émissions
magnétique qui peuvent interférer la fonction
propre d’un “pacemaker” cardiaque, les appareils
auditif, ou autre matériel de santé electronique.
Ceux qui travail près d’une application à l’arc au
jet de plasma devrait consulter leur membre
professionel de médication et le manufacturier de
matériel de santé pour déterminer s’il existe des
risques de santé.
Il faut communiquer aux opérateurs et au person-
nel TOUS les dangers possibles. Afin d’éviter les
blessures possibles, lisez, comprenez et suivez tous
lesavertissements, toutes lesprécautionsdesécurité
et toutes les consignes avant d’utiliser le matériel.
Composez le + 603-298-5711 ou votre distributeur
local si vous avez des questions.
FUMÉE et GAZ
La fumée et les gaz produits par le procédé de jet de
plasma peuvent présenter des risques et des dangers de
santé.

GENERAL INFORMATION 4 Date: August 6, 2001
• Eloignez toute fumée et gaz de votre zone de respira-
tion. Gardez votre tête hors de la plume de fumée
provenant du chalumeau.
• Utilisez un appareil respiratoire à alimentation en air
sil’aérationfourniene permet pas d’éliminer la fumée
et les gaz.
• Les sortes de gaz et de fumée provenant de l’arc de
plasma dépendent du genre de métal utilisé, des
revêtements se trouvant sur le métal et des différents
procédés. Vous devez prendre soin lorsque vous
coupez ou soudez tout métal pouvant contenir un ou
plusieurs des éléments suivants:
antimoine cadmium mercure
argent chrome nickel
arsenic cobalt plomb
baryum cuivre sélénium
béryllium manganèse vanadium
• Lisez toujours les fiches de données sur la sécurité
des matières (sigle américain “MSDS”); celles-ci
devraient être fournies avec le matériel que vous
utilisez. Les MSDS contiennent des renseignements
quant à la quantité et la nature de la fumée et des gaz
pouvant poser des dangers de santé.
• Pour des informations sur la manière de tester la
fumée et les gaz de votre lieu de travail, consultez
l’article 1 et les documents cités à la page 5.
• Utilisez un équipement spécial tel que des tables de
coupe à débit d’eau ou à courant descendant pour
capter la fumée et les gaz.
• N’utilisez pas le chalumeau au jet de plasma dans une
zone où se trouvent des matières ou des gaz combus-
tibles ou explosifs.
• Le phosgène, un gaz toxique, est généré par la fumée
provenant des solvants et des produits de nettoyage
chlorés. Eliminez toute source de telle fumée.
• Ce produit, dans le procéder de soudage et de coupe,
produit de la fumée ou des gaz pouvant contenir des
éléments reconnu dans L’état de la Californie, qui
peuvent causer des défauts de naissance et le cancer.
(La sécurité de santé en Californie et la code sécurité
Sec. 25249.5 et seq.)
CHOC ELECTRIQUE
Les chocs électriques peuvent blesser ou même tuer. Le
procédé au jet de plasma requiert et produit de l’énergie
électrique haute tension. Cette énergie électrique peut
produiredes chocs graves, voiremortels, pour l’opérateur
et les autres personnes sur le lieu de travail.
• Netouchezjamais une pièce “sous tension” ou“vive”;
portez des gants et des vêtements secs. Isolez-vous
de la pièce de travail ou des autres parties du circuit
de soudage.
• Réparez ou remplacez toute pièce usée ou
endommagée.
• Prenez des soins particuliers lorsque la zone de tra-
vail est humide ou moite.
• Montez et maintenez le matériel conformément au
Code électrique national des Etats-Unis. (Voir la page
5, article 9.)
• Débranchez l’alimentation électrique avant tout tra-
vail d’entretien ou de réparation.
• Lisez et respectez toutes les consignes du Manuel de
consignes.
INCENDIE ET EXPLOSION
Lesincendies et lesexplosionspeuvent résulterdes scories
chaudes, des étincelles ou de l’arc de plasma. Le procédé
à l’arc de plasma produit du métal, des étincelles, des
scories chaudes pouvant mettre le feu aux matières com-
bustibles ou provoquer l’explosion de fumées
inflammables.
• Soyez certain qu’aucune matière combustible ou in-
flammable ne se trouve sur le lieu de travail. Protégez
toute telle matière qu’il est impossible de retirer de la
zone de travail.
• Procurez une bonne aération de toutes les fumées
inflammables ou explosives.
• Ne coupez pas et ne soudez pas les conteneurs ayant
pu renfermer des matières combustibles.
• Prévoyezune veilled’incendie lors detouttravail dans
une zone présentant des dangers d’incendie.
• Le gas hydrogène peut se former ou s’accumuler sous
les pièces de travail en aluminium lorsqu’elles sont
coupées sous l’eau ou sur une table d’eau. NE PAS
couper les alliages en aluminium sous l’eau ou sur
une table d’eau à moins que le gas hydrogène peut
s’échapperouse dissiper. Le gas hydrogèneaccumulé
explosera si enflammé.
RAYONS D’ARC DE PLASMA
Les rayons provenant de l’arc de plasma peuvent blesser
vos yeux et brûler votre peau. Le procédé à l’arc de
plasma produit une lumière infra-rouge et des rayons

Date: August 6, 2001 5 GENERAL INFORMATION
ultra-violets très forts. Ces rayons d’arc nuiront à vos
yeux et brûleront votre peau si vous ne vous protégez
pas correctement.
• Pour protéger vos yeux, portez toujours un casque ou
un écran de soudeur. Portez toujours des lunettes de
sécurité munies de parois latérales ou des lunettes de
protection ou une autre sorte de protection oculaire.
• Portezdes gants de soudeur etunvêtement protecteur
approprié pour protéger votre peau contre les
étincelles et les rayons de l’arc.
• Maintenez votre casque et vos lunettes de protection
en bon état. Remplacez toute lentille sale ou
comportant fissure ou rognure.
• Protégez les autres personnes se trouvant sur la zone
de travail contre les rayons de l’arc en fournissant des
cabines ou des écrans de protection.
• Utilisez la nuance de lentille qui est suggèrée dans le
recommendation qui suivent ANSI/ASC Z49.1:
Nuance Minimum Nuance Suggerée
Courant Arc Protective Numéro Numéro
Moins de 300* 8 9
300 - 400* 9 12
400 - 800* 10 14
*Ces valeurs s’appliquentoul’arc actuelest observé
clairement. L’experience a démontrer que les filtres
moins foncés peuvent être utilisés quand l’arc est
caché par moiceau de travail.
BRUIT
Le bruit peut provoquer une perte permanente de l’ouïe.
Les procédés de soudage à l’arc de plasma peuvent
provoquer des niveaux sonores supérieurs aux limites
normalement acceptables. Vous dú4ez vous protéger les
oreilles contre les bruits forts afin d’éviter une perte
permanente de l’ouïe.
• Pour protéger votre ouïe contre les bruits forts, portez
des tampons protecteurs et/ou des protections
auriculaires. Protégezégalement les autrespersonnes
se trouvant sur le lieu de travail.
• Il faut mesurer les niveaux sonores afin d’assurer que
les décibels (le bruit) ne dépassent pas les niveaux
sûrs.
• Pour des renseignements sur la manière de tester le
bruit, consultez l’article 1, page 5.
1.06 Documents De Reference
Consultez les normes suivantes ou les révisions les plus
récentes ayant été faites à celles-ci pour de plus amples
renseignements :
1. OSHA, NORMES DE SÉCURITÉ DUTRAVAILET DE
PROTECTION DE LA SANTÉ, 29CFR 1910,
disponible auprès du Superintendent of Documents,
U.S. Government Printing Office, Washington, D.C.
20402
2. Norme ANSI Z49.1, LA SÉCURITÉ DES
OPÉRATIONS DE COUPE ET DE SOUDAGE,
disponible auprès de la Société Américaine de
Soudage (American Welding Society), 550 N.W.
LeJeune Rd., Miami, FL 33126
3. NIOSH, LA SÉCURITÉ ET LA SANTÉ LORS DES
OPÉRATIONS DE COUPE ET DE SOUDAGE À
L’ARC ET AU GAZ, disponible auprès du Superin-
tendent of Documents, U.S. Government Printing
Office, Washington, D.C. 20402
4. Norme ANSI Z87.1, PRATIQUES SURES POUR LA
PROTECTION DES YEUX ET DU VISAGEAU TRA-
VAILET DANS LES ECOLES, disponible de l’Institut
Américain des Normes Nationales (American Na-
tionalStandardsInstitute), 1430 Broadway,NewYork,
NY 10018
5. Norme ANSI Z41.1, NORMES POUR LES
CHAUSSURES PROTECTRICES, disponible auprès
de l’American National Standards Institute, 1430
Broadway, New York, NY 10018
6. NormeANSI Z49.2, PRÉVENTION DES INCENDIES
LORS DE L’EMPLOI DE PROCÉDÉS DE COUPE ET
DE SOUDAGE, disponible auprès de l’American Na-
tional Standards Institute, 1430 Broadway, New York,
NY 10018
7. NormeA6.0 de l’AssociationAméricaine du Soudage
(AWS), LE SOUDAGE ET LA COUPE DE
CONTENEURSAYANT RENFERMÉDESPRODUITS
COMBUSTIBLES, disponible auprès de la American
Welding Society, 550 N.W. LeJeune Rd., Miami, FL
33126
8. Norme 51 de l’Association Américaine pour la Pro-
tection contre les Incendies (NFPA), LES SYSTEMES
À GAZ AVEC ALIMENTATION EN OXYGENE
POUR LE SOUDAGE, LA COUPE ET LES
PROCÉDÉS ASSOCIÉS, disponible auprès de la Na-
tional Fire Protection Association, Batterymarch Park,
Quincy, MA02269

GENERAL INFORMATION 6 Date: August 6, 2001
9. Norme 70 de la NFPA, CODE ELECTRIQUE NA-
TIONAL, disponible auprès de la National Fire Pro-
tectionAssociation,Batterymarch Park,Quincy,MA
02269
10. Norme 51B de la NFPA, LES PROCÉDÉS DE
COUPE ET DE SOUDAGE, disponible auprès de la
National Fire Protection Association, Batterymarch
Park, Quincy, MA02269
11. Brochure GCA P-1, LA MANIPULATION SANS
RISQUE DES GAZ COMPRIMÉS EN CYLINDRES,
disponible auprès de l’Association des Gaz
Comprimés (Compressed Gas Association), 1235
Jefferson Davis Highway, Suite 501, Arlington, VA
22202
12. Norme CSA W117.2, CODE DE SÉCURITÉ POUR
LE SOUDAGE ET LA COUPE, disponible auprès
de l’Association des Normes Canadiennes, Stan-
dards Sales, 178 Rexdale Boulevard, Rexdale,
Ontario, Canada, M9W 1R3
13.Livret NWSA, BIBLIOGRAPHIE SUR LA
SÉCURITÉ DU SOUDAGE, disponible auprès de
l’Association Nationale de Fournitures de Soudage
(National Welding Supply Association), 1900 Arch
Street, Philadelphia, PA 19103
14. Norme AWSF4.1 de l’Association Américaine de
Soudage, RECOMMANDATIONS DE PRATIQUES
SURES POUR LAPRÉPARATION ÀLACOUPE ET
AU SOUDAGE DE CONTENEURS ET TUYAUX
AYANT RENFERMÉ DES PRODUITS
DANGEREUX , disponible auprès de la American
Welding Society, 550 N.W. LeJeune Rd., Miami, FL
33126
15. NormeANSI Z88.2, PRATIQUES DE PROTECTION
RESPIRATOIRE, disponible auprès de l’American
National Standards Institute, 1430 Broadway, New
York, NY 10018

Date: August 6, 2001 7 GENERAL INFORMATION
1.07 Declaration of Conformity
Manufacturer: Thermal Dynamics Corporation
Address: Industrial Park #2
West Lebanon, New Hampshire 03784
USA
The equipment described in this manual conforms to all applicable aspects and regulations of the ‘Low Voltage Direc-
tive’ (European Council Directive 73/23/EEC as amended by Council Directive 93/68/EEC) and to the National
legislation for the enforcement of this Directive.
The equipment described in this manual conforms to all applicable aspects and regulations of the "EMC Directive"
(European Council Directive 89/336/EEC) and to the National legislation for the enforcement of this Directive.
Serial numbers are unique with each individual piece of equipment and details description, parts used to manufac-
ture a unit and date of manufacture.
National Standard and Technical Specifications
The product is designed and manufactured to a number of standards and technical requirements among them are:
* CSA(Canadian StandardsAssociation) standard C22.2 number 60 forArc welding equipment.
* UL(Underwriters Laboratory) rating 94VO flammability testing for all printed-circuit boards used.
* CENELEC EN50199 EMC Product Standard forArc Welding Equipment.
* ISO/IEC 60974-1 (BS 638-PT10) (EN 60 974-1) (EN50192) (EN50078) applicable to plasma cutting equipment and associ-
ated accessories.
* Extensive product design verification is conducted at the manufacturing facility as part of the routine design and
manufacturing process. This is to ensure the product is safe, when used according to instructions in this manual and
related industry standards, and performs as specified. Rigorous testing is incorporated into the manufacturing
process to ensure the manufactured product meets or exceeds all design specifications.
Thermal Dynamics has been manufacturing products for more than 30 years, and will continue to achieve excellence in our
area of manufacture.
Manufacturers responsible representative: Giorgio Bassi
Managing Director
Thermal Dynamics Europe
Via rio Fabbiani 8A
40067 Rastignano (BO)
Italy

GENERAL INFORMATION 8 Date: August 6, 2001
1.08 Statement of Warranty
LIMITED WARRANTY: Thermal Dynamics®Corporation (hereinafter “Thermal”) warrants that its products will be free of defects in
workmanship or material. Should any failure to conform to this warranty appear within the time period applicable to the Thermal
products as stated below, Thermal shall, upon notification thereof and substantiation that the product has been stored, installed, operated,
and maintained in accordance with Thermal’s specifications, instructions, recommendations and recognized standard industry practice,
and not subject to misuse, repair, neglect, alteration, or accident, correct such defects by suitable repair or replacement, at Thermal’s sole
option, of any components or parts of the product determined by Thermal to be defective.
THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE.
LIMITATION OF LIABILITY: Thermal shall not under any circumstances be liable for special or consequential damages, such as, but
not limited to, damage or loss of purchased or replacement goods, or claims of customers of distributor (hereinafter “Purchaser”) for
service interruption. The remedies of the Purchaser set forth herein are exclusive and the liability of Thermal with respect to any
contract, or anything done in connection therewith such as the performance or breach thereof, or from the manufacture, sale, delivery,
resale, or use of any goods covered by or furnished by Thermal whether arising out of contract, negligence, strict tort, or under any
warranty, or otherwise, shall not, except as expressly provided herein, exceed the price of the goods upon which such liability is based.
THIS WARRANTY BECOMES INVALID IF REPLACEMENT PARTS OR ACCESSORIES ARE USED WHICH MAY IMPAIR THE
SAFETY OR PERFORMANCE OF ANY THERMAL PRODUCT.
THIS WARRANTY IS INVALID IF THE PRODUCT IS SOLD BY NON-AUTHORIZED PERSONS.
The limited warranty periods for Thermal products shall be as follows (with the exception of XL Plus Series, CutMaster Series , Cougar
and DRAG-GUN): A maximum of three (3) years from date of sale to an authorized distributor and a maximum of two (2) years from
date of sale by such distributor to the Purchaser, and with the further limitations on such two (2) year period (see chart below).
The limited warranty period for XL Plus Series and CutMaster Series shall be as follows: A maximum of four (4) years from date
of sale to an authorized distributor and a maximum of three (3) years from date of sale by such distributor to the Purchaser, and
with the further limitations on such three (3) year period (see chart below).
The limited warranty period for Cougar and DRAG-GUN shall be as follows: Amaximum of two (2) years from date of sale to an
authorized distributor and a maximum of one (1) year from date of sale by such distributor to the Purchaser, and with the further
limitations on such two (2) year period (see chart below).
Parts
XL Plus & Parts Parts
PAK Units, Power Supplies CutMaster Series Cougar/Drag-Gun All Others Labor
Main Power Magnetics 3 Years 1 Year 2 Years 1 Year
Original Main Power Rectifier 3 Years 1 Year 2 Years 1 Year
Control PC Board 3 Years 1 Year 2 Years 1 Year
All Other Circuits And Components Including, 1 Year 1 Year 1 Year 1 Year
But Not Limited To, Starting Circuit,
Contactors, Relays, Solenoids, Pumps,
Power Switching Semi-Conductors
Consoles, Control Equipment, Heat 1 Year 1 Year 1 Year
Exchanges, And Accessory Equipment
Torch And Leads
Maximizer 300 Torch 1 Year 1 Year
SureLok Torches 1 Year 1 Year 1 Year
All Other Torches 180 Days 180 Days 180 Days 180 Days
Repair/Replacement Parts 90 Days 90 Days 90 Days None
Warranty repairs or replacement claims under this limited warranty must be submitted by an authorized Thermal Dynamics® repair
facility within thirty (30) days of the repair. No transportation costs of any kind will be paid under this warranty. Transportation charges
to send products to an authorized warranty repair facility shall be the responsibility of the customer. All returned goods shall be at the
customer’s risk and expense. This warranty supersedes all previous Thermal warranties.
Effective August 6, 2001

Manual 0-2607 9 INTRODUCTION
SECTION 2:
INTRODUCTION
2.01 Scope of Manual
Thismanualcontains descriptions, operating instructions
and basic maintenance procedures for the PAK Master®
75XLAir Plasma Cutting Power Supply (EMC). Service
of this equipment is restricted to Thermal Dynamics
trained personnel; unqualified personnel are strictly cau-
tionedagainstattemptingrepairsor adjustments not cov-
ered in this manual, at the risk of voiding the Warranty.
Read this manual thoroughly. A complete understand-
ing of the characteristics and capabilities of this equip-
ment will assure the dependable operation for which it
was designed.
2.02 General Description
The power supply provides 55 amp maximum output
and includes all control circuitry, electrical and gas in-
puts and outputs, pilot circuitry, torch leads receptacle
and a work cable with clamp. Machine torch systems
also include a remote hand ON/OFF pendant.
NOTE
The power supply can be ordered in various con-
figurations with various options factory installed.
Pak Master 75XL
Power Supply
PCH/M-75
Torch and Leads
Work Cable
With Clamp
A-01368
Figure 2-1 Pak Master 75XL Power Supply
The power supply is designed to work with the Model
PCH/M-75 Plasma Torches.
Torches will provide a maximum 3/4 inch (19.05 mm)
cut capacity. Hand torches are available in 70° and 90°
configurations. Machine torches are available only in
Model PCM-75 and include a rack and pinion mounting
assembly. Torch leads are available in 25 ft (7.6 m), or 50
ft (15.2 m) lengths with fittings for simple installation.
The torch includes a spare parts kit which provides an
assortment of replacement torch parts.
NOTE
Refer to Section 2.04 for list of power supply op-
tions and accessories.
2.03 Specifications/Design Features
A. Power Supply Technical Specifications
The following specifications apply to the Power Supply
only:
1. Front Panel Controls
ON/OFF Switch, RUN/SET Switch and Output Cur-
rent Control
2. Front Panel LED Indicators
AC, TEMP, GAS, DC
3. Rear Panel
Input power cable strain relief, gas connection, Gas
Regulator/Filter Assembly
4. Input Power
Available for the following input power:
208/230/240 VAC (±8%), 50/60 Hz, Three-Phase
380/415 VAC (±10%), 50/60 Hz, Three-Phase
460 VAC (±10%), 50/60 Hz, Three-Phase
Suppliedwith10ft(3.05m)4-ConductorInputPower
Cable with filtering beads.
5. Output Power
Continuously variable from 15 to 55Amps maximum
6. Duty Cycle
60% Duty Cycle @ 130V output with 60 Hz input
50% Duty Cycle @ 130V output with 50 Hz input
7. Cut Capacity
3/4 inch (19.05 mm); 1 inch (25.4 mm) severance
8. Pilot Circuitry
High Frequency (HF), Pulsed DC

INTRODUCTION 10 Manual 0-2607
9. Weight
72 lbs (32.7 kg)
10. Overall Dimensions
18.9" (480 mm) High x 13" (330 mm) Wide x 23.5"
(597 mm) Long
Overall dimensions are with handle, lead wrap
bracket,andGasRegulator/FilterAssembly installed.
B. Gas Regulator/Filter Assembly
Specifications
The following specifications apply to the Gas Regula-
tor/Filter Assembly only:
1. Gas regulator maximum gauge pressure
160 psi (11 BAR or 11.03 kPa)
2. Maximum input gas pressure
125 psi (8.6 BAR or 861 kPa)
3. Filter
Coalescent type filter
2.04 Power Supply Options and
Accessories
NOTE
Refer to Section 6, Parts Lists, for part numbers
and ordering information.
The following are accessories that are available for this
power supply:
A. Two Stage Air Line Filter
An optional two stage air line filter is available. The
filter will remove moisture and contaminants from
the air stream when using compressed air. The filter
is capable of filtering to at least 5 microns. The filter
assembly is pre-assembled at the factory and need
only be attached to the power supply.
B. High Pressure Regulators
High pressure regulators are available for air and ni-
trogen. The regulators are used to set the proper pres-
sure for the type gas being used.
C. Smart Cart
Steel cart on easy rolling 10" pneumatic tires to pro-
vide maximum mobility for the power supply.
Handle is 3/4" tubing with hooks for storage of torch
leads. A tie down strap is also included.
D. Interface Cable
NOTE
This accessory can be used only with the PCM-75
Torches.
The interface cable is available in two lengths, 25 ft
(7.6 m) and 50 ft (15.2 m). The cable is used to inter-
face the power supply with an auxiliary control de-
vice to provide OK-To-Move and ON/OFF signals.

Manual 0-2607 11 INSTALLATION PROCEDURES
SECTION 3:
INSTALLATION
PROCEDURES
3.01 Introduction
NOTE
Depending on how the system was ordered, some
Power Supply Options may already be installed.
If option(s) have been factory installed some of the
instructions may not apply. It is recommended
that all sub-sections be read for general informa-
tion.,
This Section describes installation of the Power Supply
and connecting the Torch.
These instructions apply to the Power Supply only; in-
stallation procedures for the Torch, Options, and Acces-
sories are given in Manuals specifically provided for
those units.
The complete installation consists of:
1. Site selection
2. Unpacking
3. Connections to Power Supply
a. Input power
b. Gas
c. Work cable
d. Torch Leads
4. Grounding
5. Operator training
3.02 Site Selection
Select a clean, dry location with good ventilation and
adequate working space around all components.
NOTE
Review Important Safety Precautions (page 1) to
be sure that the selected location meets all safety
requirements.
The power supply is fan cooled by air flow through the
front panel to the rear panel. Air flow must not be ob-
structed. Provide at least 2 feet (0.61 m) in the rear and
at least 6 inches (0.15 m) on each side for clearance .
Provide sufficient clearance in front of the unit to allow
access to the front panel controls (minimum 6 inches or
0.15 m).
CAUTION
Operation without proper air flow will inhibit
proper cooling and reduce duty cycle.
3.03 Unpacking
NOTE
Equipment that was ordered as a system is pack-
aged in one shipping carton. All options and the
Torch are factory installed.
Each component of the system is packaged and protected
with a carton and packing material to prevent damage
during shipping.
A. Power Supply
Included with each power supply is Input Power Cable,
Work Cable and Clamp; Pressure Regulator/Filter As-
sembly and connection hardware; Operating Manual.
B. Torch and Leads
Included with each Torch is Torch and Leads with Torch
Handle Assembly, Shield Cup, Tip, Electrode, Gas Dis-
tributor and all connectors installed; Torch Spare Parts
Kit; Operating Manual.
Machine Torches also include Metal Rack and Pinion
MountingAssembly,and Remote ControlHand Pendant.
C. Options and Accessories
Options and Accessories are packaged separately if not
installed at the factory.
D. Unpacking Procedure
1. Unpack each item and remove all packing material.
NOTE
The Spare Parts Kit is shipped in the Torch Leads
Storage Area on the side of the Power Supply.
2. Locate the packing list(s) and use the list to identify
and account for each item.
3. Inspect each item for possible shipping damage. If
damage is evident, contact your distributor and/or
shipping company before proceeding with system in-
stallation.

INSTALLATION PROCEDURES 12 Manual 0-2607
3.04 Lifting Options
WARNINGS
Do not touch live electrical parts.
Disconnect input power conductors from de-en-
ergized supply line before moving unit.
This unit is equipped with one handle mounted onto
the top of the enclosure for hand carrying purposes.
WARNING
FALLING EQUIPMENT can cause serious per-
sonal injury and equipment damage.
• Lift unit with the handle on top of the enclosure.
• Persons only of adequate physical strength should
lift the unit.
• Use hand cart or similar device of adequate capac-
ity.
• If using a fork lift vehicle, place and secure unit on
a proper skid before transporting.
• This unit has a handle mounted on top of the en-
closure for hand lifting only. Be sure unit is lifted
and transported safely and securely.
WARNING
HANDLE is not for mechanical lifting.
3.05 Input Power Connections
The Power Supply accepts input voltages from 208V to
460V. Input can be 50 or 60 Hz, three-phase. The Power
Supply is factory wired for 380/415V three-phase input.
For any other input voltage, the Power Supply must be
internally reset.
NOTE
Refer to Section 3.06, Input Voltage Selection for
procedure.
A. Input Voltage Selection
The Power Supply is factory-wired for 380/415V three-
phase input. For any other input voltage, the Power Sup-
ply must be changed using the procedure in Section 3.06.
B. Electrical Connections
The power source must conform to local and national
electric codes. Recommended circuit protection and wir-
ing requirements are shown in Appendix I.
C. Opening Power Supply Enclosure
The left side panel of the Power Supply must be removed
to gain access to the input power connections and the
input voltage selection.
WARNING
Disconnect primary power at the source before as-
semblingordisassemblingthe Power Supply,torch
parts, or torch and leads assemblies.
1. Using a phillips head screw driver remove the five
screws which secure the left side panel (viewed from
front of unit) to the frame assembly.
Screws
(5 Places)
Left Side
Panel
A-01562
Ground Wire
Figure 3-1 Removing Left Side Panel
NOTE
There is a ground wire connection to the Left Side
Panel on the inside of the unit.
2. Carefully pull the Left Side Panel up and away from
the unit far enough to gain access to the inside of the
unit.
3.06 InputVoltage Selection
The Power Supply has three voltage settings; 208/230/
240VAC, 380/415VAC, or 460VAC. Power Supplies are
factory-wired for 380/415VAC three-phase input. In-
put voltage selection is accomplished by switching a wire
harness connector inside the Power Supply.

Manual 0-2607 13 INSTALLATION PROCEDURES
WARNING
Disconnect primary power at the source before as-
sembling or disassembling the power supply, torch
parts, or torch and leads assemblies.
Move the power selection plug to the desired input con-
nection for 208/230/240V, 380/415V, or 460V operation
per the label attached to the panel.
Voltage Selection
Connector
380/415 Volts
460 Volts
208/230/240 Volts
A-01546
Voltage Selection
Label
EMC Filter
Figure 3-2 Input Voltage Selection
3.07 Input Power Cable Connections
The Power Supply is supplied with a 460V three-phase
input EMC power cable attached. Connect the supplied
input EMC power cable per the following:
NOTE
The input power cable must not be modified in
anywayas filtering beads areinstalledonthe cable.
1. Strip back the outer covering approximately 3
inches (76 mm) to expose the individual wires at
the free end of the cable.
2. Cut back the insulation on the individual wires
approximately 1/8 - 3/16 inch (3-5 mm).
3. Connect the ends of the individual wires a cus-
tomer supplied plug or main disconnect per the
following:
NOTE
All the input cable wires must be connected for
three-phase operation.
• Blue wire to Line 2 (Live)
• Black wire to Line 3 (Live), refer to Note above
• Brown wire to Line 1 (Live)
• Green/Yellow wire to Ground (Earth)
CAUTION
The primary power source, power cable, and plug
all must conform to local electric code and the rec-
ommended circuit protection and wiring require-
ments (refer to Appendix I).
3.08 Gas Connections
A. Gas Requirements
WARNING
This unit not to be used with oxygen (O2).
Gases: Compressed Air or Nitrogen (N2) Only
Pressure: 60 psi (4.1 BAR or 414 kPa)
CAUTION
Maximum input gas pressure must not exceed 125
psi (8.6 BAR or 861 kPa)
Flow: Cutting - 300 scfh (141.5 lpm)
Gouging - 300 scfh (141.5 lpm)
CAUTION
Air supply must be free of oil, moisture, and other
contaminants. Excessive oil and moisture may
cause double-arcing, rapid tip wear, or even com-
plete torch failure. Contaminants may cause poor
cutting performance and rapid electrode wear.

INSTALLATION PROCEDURES 14 Manual 0-2607
B. Checking Air Quality
To test the quality of air, place the RUN/SET switch to
SET position, place a welding filter lens in front of the
torch and turn on the gas. Any oil or moisture in the air
will be visible on the lens. Do not initiate an arc!
C. Gas Connection
The gas supply is connected to the rear of the Power
Supply. The connection is the same for compressed air
or high pressure gas cylinders.
CAUTION
The air supply must be free of oil, moisture, and
other contaminants. Excessive oil and moisture
may cause double-arcing, rapid tip wear, or even
complete torch failure. Contaminants may cause
poor cutting performance and rapid electrode wear.
An air line filter is supplied as part of the Pressure Regu-
lator/Filter Assembly installed on the rear of the unit.
NOTE
Filtering is required when using air from a com-
pressor to insure that moisture and debris from
the supply hose does not enter the torch. It is rec-
ommended to order the Optional Two Stage Air
Line Filter for improved air filtering.
1. Locate the 1/4 NPT to #4 (6 mm) hose barb fitting
shipped inside the Torch Spare Parts Kit.
NOTE
A barb fitting is provided for connection of the
gas supply hose to the rear of the Power Supply.
The fitting is placed in the Spare Parts Kit for
shipment.
2. Depending on the options installed at the factory, in-
stall the supplied barb fitting into the input of the
Regulator/FilterAssembly or the Optional Two Stage
Air Filter Assembly.
3. Tighten the barb fitting.
4. Place an adjustable hose clamp, 1/4" (6.35mm) to 5/
8" (15.88mm), over the gas supply hose.
Regulator/Filter
Assembly
1/4 NPT to #4 (6 mm) Hose
Fitting
#4 (6 mm) Gas
Supply Hose
Hose Clamp
A-01149
Figure 3-3 Gas Connection To Regulator/Filter
Assembly
Two Stage Filter
Assembly
1/4 NPT to
#4 (6mm) Hose
Fitting
#4 (6mm) Gas
Supply Hose
Hose Clamp
A-01150
Figure 3-4 Gas Connection To Optional Two Stage
Filter Assembly
5. Refer to the following when using high pressure gas
cylinders as the gas supply: