ESAB HANDY PLASMA 125 User manual

F15-568-D October, 2007
HANDY PLASMA 125
These INSTRUCTIONS are for experienced operators. If you are not fully familiar with the principles of operation and safe practices for
arc welding and cutting equipment, we urge you to read our booklet, “Precautions and Safe Practices for Arc Welding, Cutting and
Gouging”, Form 52-529. Do NOT permit untrained persons to install, operate, or maintain this equipment. Do NOT attempt to install or
operate this equipment until you have read and fully understand these instructions. If you do not fully understand these instructions,
contact your supplier for further information. Be sure to read the Safety Precautions before installing or operating this equipment.
PLASMA ARC CUTTING PACKAGE - P/N 37884 115V 60HZ
F15-568D

2
Table of Contents
Sections
Safety Precautions
Section 1, Descriptions
Section 2, Equipment Supplied
Section 3, Installation
Section 4, Operation
Section 5, Maintenance
Section 6, PT-34 Torch - Installation, Operation, and Maintenance
Section 7, Replacement Parts
Section 8, Electrical Diagrams (Schematic)
Section 8, Electrical Diagrams (Wiring)
Back Cover Communications and Customer Services
Guide
Page
1-6
7
7
8,9
10,11
12,13
14-17
18-20
21
22,23

3
WARNING: These Safety Precautions are for
your protection. They summarize precaution-
ary information from the references listed in
Additional Safety Information section. Before
performing any installation or operating procedures, be
sure to read and follow the safety precautions listed below
as well as all other manuals, material safety data sheets,
labels,etc.FailuretoobserveSafetyPrecautionscanresult
in injury or death.
PROTECT YOURSELF AND OTHERS--
Some welding, cutting, and gouging
processes are noisy and require ear
protection. The arc, like the sun, emits
ultraviolet(UV)andotherradiationand
can injure skin and eyes. Hot metal can cause burns.
Training in the proper use of the processes and equip-
ment is essential to prevent accidents. Therefore:
1. Alwayswearsafetyglasseswithsideshieldsin any work
area, even if welding helmets, face shields, and goggles
are also required.
2. Use a face shield fitted with the correct filter and cover
plates to protect your eyes, face, neck, and ears from
sparks and rays of the arc when operating or observing
operations. Warn bystanders not to watch the arc and
not to expose themselves to the rays of the electric-arc
or hot metal.
3. Wearflameproofgauntlettypegloves,heavylong-sleeve
shirt, cuffless trousers, high-topped shoes, and a weld-
ing helmet or cap for hair protection, to protect against
arcrays andhot sparksor hotmetal. Aflameproof apron
may also be desirable as protection against radiated
heat and sparks.
4. Hot sparks or metal can lodge in rolled up sleeves,
trouser cuffs, or pockets. Sleeves and collars should be
kept buttoned, and open pockets eliminated from the
front of clothing
5. Protect other personnel from arc rays and hot sparks
with a suitable non-flammable partition or curtains.
6. Use goggles over safety glasses when chipping slag or
grinding. Chipped slag may be hot and can fly far.
Bystandersshouldalsoweargogglesoversafetyglasses.
FIRES AND EXPLOSIONS -- Heat from
flamesandarcs can startfires.Hotslag
or sparks can also cause fires and ex-
plosions. Therefore:
1. Remove all combustible materials well away from the
work area or cover the materials with a protective non-
flammablecovering.Combustiblematerialsincludewood,
cloth,sawdust, liquidand gasfuels, solvents,paints and
coatings, paper, etc.
2. Hot sparks or hot metal can fall through cracks or
crevices in floors or wall openings and cause a hidden
smoldering fire or fires on the floor below. Make certain
that such openings are protected from hot sparks and
metal.“
3. Do not weld, cut or perform other hot work until the
workpiece has been completely cleaned so that there
are no substances on the workpiece which might pro-
duce flammable or toxic vapors. Do not do hot work on
closed containers. They may explode.
4. Havefireextinguishingequipment handy forinstantuse,
such as a garden hose, water pail, sand bucket, or
portable fire extinguisher. Be sure you are trained in its
use.
SAFETY PRECAUTIONS
10/98
5. Do not use equipment beyond its ratings. For example,
overloaded welding cable can overheat and create a fire
hazard.
6. After completing operations, inspect the work area to
make certain there are no hot sparks or hot metal which
could cause a later fire. Use fire watchers when neces-
sary.
7. For additional information, refer to NFPA Standard 51B,
"Fire Prevention in Use of Cutting and Welding Pro-
cesses",available fromtheNational FireProtectionAsso-
ciation, Batterymarch Park, Quincy, MA 02269.
ELECTRICALSHOCK--Contactwithlive
electrical parts and ground can cause
severe injury or death. DO NOT use AC
welding current in damp areas, if move-
ment is confined, or if there is danger of
falling.
1. Be sure the power source frame (chassis) is connected
to the ground system of the input power.
2. Connect the workpiece to a good electrical ground.
3. Connect the work cable to the workpiece. A poor or
missing connection can expose you or others to a fatal
shock.
4. Use well-maintained equipment. Replace worn or dam-
aged cables.
5. Keepeverythingdry,includingclothing,workarea,cables,
torch/electrode holder, and power source.
6. Make sure that all parts of your body are insulated from
work and from ground.
7. Do not stand directly on metal or the earth while working
in tight quarters or a damp area; stand on dry boards or
an insulating platform and wear rubber-soled shoes.
8. Puton dry,hole-freeglovesbefore turningonthepower.
9. Turn off the power before removing your gloves.
10. RefertoANSI/ASCStandard Z49.1 (listedonnextpage)
forspecificgroundingrecommendations.Donotmistake
the work lead for a ground cable.
ELECTRIC AND MAGNETIC FIELDS —
Maybedangerous.Electriccurrentflow-
ing through any conductor causes lo-
calized Electric and Magnetic Fields
(EMF). Welding and cutting current cre-
ates EMF around welding cables and
welding machines. Therefore:
1. Welders having pacemakers should consult their physi-
cian before welding. EMF may interfere with some pace-
makers.
2. Exposureto EMFmayhaveother healtheffectswhich are
unknown.
3. Welders should use the following procedures to minimize
exposure to EMF:
A. Route the electrode and work cables together. Secure
them with tape when possible.
B. Never coil the torch or work cable around your body.
C. Do not place your body between the torch and work
cables. Route cables on the same side of your body.
D. Connect the work cable to the workpiece as close as
possible to the area being welded.
E. Keep welding power source and cables as far away
from your body as possible.

4
FUMES AND GASES -- Fumes and
gases,cancausediscomfortorharm,
particularly in confined spaces. Do
notbreathefumesandgases.Shield-
ing gases can cause asphyxiation.
Therefore:
1. Always provide adequate ventilation in the work area by
naturalormechanical means.Donotweld,cut, or gouge
on materials such as galvanized steel, stainless steel,
copper,zinc,lead,beryllium,orcadmiumunlesspositive
mechanicalventilationisprovided.Donotbreathefumes
from these materials.
2. Do not operate near degreasing and spraying opera-
tions. The heat or arc rays can react with chlorinated
hydrocarbon vapors to form phosgene, a highly toxic
gas, and other irritant gases.
3. If you develop momentary eye, nose, or throat irritation
whileoperating,thisisanindicationthatventilationisnot
adequate. Stop work and take necessary steps to im-
prove ventilation in the work area. Do not continue to
operate if physical discomfort persists.
4. Refer to ANSI/ASC Standard Z49.1 (see listing below)
for specific ventilation recommendations.
5. WARNING: This product, when used for welding or
cutting, produces fumes or gases which
contain chemicals known to the State of
California to cause birth defects and, in
some cases, cancer. (California Health &
Safety Code §25249.5 et seq.)
CYLINDER HANDLING -- Cylinders, if
mishandled, can rupture and violently
release gas. Sudden rupture of cylin-
der,valve,orreliefdevicecaninjureor
kill. Therefore:
1. Use the proper gas for the process and use the proper
pressure reducing regulator designed to operate from
the compressed gas cylinder. Do not use adaptors.
Maintain hoses and fittings in good condition. Follow
manufacturer'soperatinginstructionsformountingregu-
lator to a compressed gas cylinder.
2. Always secure cylinders in an upright position by chain
orstraptosuitablehandtrucks,undercarriages,benches,
walls, post, or racks. Never secure cylinders to work
tables or fixtures where they may become part of an
electrical circuit.
3. When not in use, keep cylinder valves closed. Have
valve protection cap in place if regulator is not con-
nected. Secure and move cylinders by using suitable
hand trucks. Avoid rough handling of cylinders.
4. Locate cylinders away from heat, sparks, and flames.
Never strike an arc on a cylinder.
5. For additional information, refer to CGA Standard P-1,
"PrecautionsforSafeHandling of CompressedGasesin
Cylinders", which is available from Compressed Gas
Association, 1235 Jefferson Davis Highway, Arlington,
VA 22202.
EQUIPMENT MAINTENANCE -- Faulty or
improperly maintained equipment can
cause injury or death. Therefore:
1. Always have qualified personnel perform the installa-
tion, troubleshooting, and maintenance work. Do not
perform any electrical work unless you are qualified to
perform such work.
2. Beforeperforminganymaintenanceworkinsideapower
source, disconnect the power source from the incoming
electrical power.
3. Maintain cables, grounding wire, connections, power
cord, and power supply in safe working order. Do not
operate any equipment in faulty condition.
4. Do not abuse any equipment or accessories. Keep
equipment away from heat sources such as furnaces,
wet conditions such as water puddles, oil or grease,
corrosive atmospheres and inclement weather.
5. Keep all safety devices and cabinet covers in position
and in good repair.
6. Use equipment only for its intended purpose. Do not
modify it in any manner.
ADDITIONAL SAFETY INFORMATION -- For
more information on safe practices for elec-
tric arc welding and cutting equipment, ask
your supplier for a copy of "Precautions and
Safe Practices for Arc Welding, Cutting and
Gouging", Form 52-529.
The following publications, which are available from the
American Welding Society, 550 N.W. LeJuene Road, Mi-
ami, FL 33126, are recommended to you:
1. ANSI/ASC Z49.1 - "Safety in Welding and Cutting"
2. AWS C5.1 - "Recommended Practices for Plasma Arc
Welding"
3. AWS C5.2 - "Recommended Practices for Plasma Arc
Cutting"
4. AWS C5.3 - "Recommended Practices for Air Carbon
Arc Gouging and Cutting"
5. AWSC5.5-"RecommendedPracticesforGasTungsten
Arc Welding“
6. AWSC5.6-"RecommendedPracticesforGasMetalArc
Welding"“
7. AWS SP - "Safe Practices" - Reprint, Welding Hand-
book.
8. ANSI/AWS F4.1, "Recommended Safe Practices for
Welding and Cutting of Containers That Have Held
Hazardous Substances."
MEANING OF SYMBOLS - As used through-
out this manual: Means Attention! Be Alert!
Your safety is involved.
Means immediate hazards which, if
not avoided, will result in immediate,
serious personal injury or loss of life.
Means potential hazards which could
result in personal injury or loss of life.
Means hazards which could result in
minor personal injury.
SP98-10

5
des coupes à l’arc, à moins de les recouvrir
complètement d’une bâche non-inflammable. Ce
type de matériaux comprend notamment le bois, les
vêtements, la sciure, l’essence, le kérosène, les
peintures, les solvants, le gaz naturel, l’acétylène, le
propane et autres substances combustibles
semblables.
b. Les étincelles ou les projections de métal incandes-
cent peuvent tomber dans des fissures du plancher
ou dans des ouvertures des murs et y déclencher
une ignition lente cachée. Veiller à protéger ces
ouvertures des étincelles et des projections de
métal.
c. N’exécutez pas de soudures, de coupes,
d’opérations de gougeage ou autres travaux à chaud
à la surface de barils, bidons, réservoirs ou autres
contenants usagés, avant de les avoir nettoyés de
toute trace de substance susceptible de produire des
vapeurs inflammables ou toxiques.
d. En vue d’assurer la prévention des incendies, il
convient de disposer d’un matériel d’extinction prêt à
servir immédiatement, tel qu’un tuyau d’arrosage, un
seau à eau, un seau de sable ou un extincteur
portatif.
e. Une fois le travail à l’arc terminé, inspectez le
secteur de façon à vous assurer qu’aucune étincelle
ou projection de métal incandescent ne risque de
provoquer ultérieurement un feu.
3. CHOC ÉLECTRIQUE-- Le gougeage à l’arc et à l’arc
au plasma exige l’emploi de tensions à vide
relativement importantes; or, celles-ci risquent de
causer des dommages corporels graves et même
mortels en cas d’utilisation inadéquate. La gravité du
choc électrique reçu dépend du chemin suivi par le
courant à travers le corps humain et de son intensité.
a. Ne laissez jamais de surfaces métalliques sous
tension venir au contact direct de la peau ou de
vêtements humides. Veillez à porter des gants bien
secs.
b. Si vous devez effectuer un travail sur une surface
métallique ou dans un secteur humide, veillez à
assu-rer votre isolation corporelle en portant des
gants secs et des chaussures à semelles de ca-
outchouc et en vous tenant sur une planche ou une
plate-forme sèche.
c. Mettez toujours à la terre le poste de soudage/
coupage en le reliant par un câble à une bonne prise
de terre.
d. N’utilisez jamais de câbles usés ou endommagés. Ne
surchargez jamais le câble. Utilisez toujours un
équipement correctement entretenu.
e. Mettez l’équipement hors tension lorsqu’il n’est pas
en service. une mise à la masse accidentelle peut en
effet provoquer une surchauffe de l’équipement et un
danger d’incendie. Ne pas enrouler ou passer le
câble autour d’une partie quelconque du corps.
f. Vérifiez si le câble de masse est bien relié à la pièce
en un point aussi proche que possible de la zone de
travail. Le branchement des câbles de masse à
l’ossature du bâtiment ou en un point éloigné de la
zone de travail augmente en effet le risque de
passage d’un courant de sortie par des chaînes de
PRÉCAUTIONS DE SÉCURITÉ
AVERTISSEMENT: Ces règles de sécurité ont pour
objet d’ assurer votre protection. Veillez à lire et à
observer les précautions énoncées ci-dessous avant de
monter l’ équipement ou de commercer à l’utiliser. Tout
défaut d’observation de ces précautions risque
d’entraîner des blessures graves ou mortelles.
1. PROTECTION INDIVIDUELLE-- Les brûlures de la
peau et des yeux dues au rayonnement de l’arc
électrique ou du métal incandescent, lors du
soudage au plasma ou à l’électrode ou lors du
gougeage à l’arc, peuvent s’avérer plus graves que
celles résultant d’une exposition prolongée au soleil.
Aussi convient-il d’observer les précautions
suivantes:
a. Portez un écran facial adéquat muni des plaques
protectrices et des verres filtrants appropriés afin de
vous protéger les yeux, le visage, le cou et les
oreilles des étincelles et du rayonnement de l’arc
électrique lorsque vous effectuez des soudures ou
des coupes ou lorsque vous en observez l’exécution.
AVERTISSEZ les personnes se trouvant à proximité
de façon à ce qu’elles ne regardent pas l’arc et à ce
qu’elles ne s’exposent pas à son rayonnement, ni à
celui du métal incandescent.
b. Portez des gants ignifugés à crispins, une tunique
épaisse à manches longues, des pantalons sans
rebord, des chaussures à embout d’acier et un
casque de soudage ou une calotte de protection, afin
d’éviter d’exposer la peau au rayonnement de l’arc
électrique ou du métal incandescent. ll est
également souhaitable d’utiliser un tablier
ininflammable de façon à se protéger des étincelles
et du rayonnement thermique.
c. Les étincelles ou les projections de métal incandes-
cent risquent de se loger dans des manches
retroussées, des bords relevés de pantalons ou
dans des poches. Aussi convient-il de garder
boutonnés le col et les manches et de porter des
vêtements sans poches à l’avant.
d. Protégez des étincelles et du rayonnement de l’arc
électrique les autres personnes travaillant à
proximité à l’aide d’un écran ininflammable adéquat.
e. Ne jamais omettre de porter des lunettes de sécurité
lorsque vous vous trouvez dans un secteur où l’on
effectue des opérations de soudage ou de coupage
à l’arc. Utilisez des lunettes de sécurité à écrans ou
verres latéraux pour piquer ou meûler le laitier. Les
piquetures incandescentes de laitier peuvent être
projetées à des distances considérables. Les
personnes se trouvant à proximité doivent
également porter des lunettes de protection.
f. Le gougeage à l’arc et le soudage à l’arc au plasma
produisent un niveau de bruit extrêmement élevé (de
100 à 114 dB) et exigent par conséquent l’emploi de
dispositifs appropriés de protection auditive.
2. PRÉVENTION DES INCENDES-- Les projections de
laitier incandescent ou d’étincelles peuvent
provoquer de graves incendies au contact de
matériaux combustibles solides, liquides ou gazeux.
Aussi faut-il observer les précautions suivantes:
a. Éloigner suffisamment tous les matériaux combus-
tibles du secteur où l’on exécute des soudures ou
9/97

6
g. Empêchez l’apparition de toute humidité, notamment
sur vos vêtements, à la surface de l’emplacement de
travail, des câbles, du porte-électrode et du poste de
soudage/coupage. Réparez immédiatement toute
fuite d’eau.
4. VENTILATION-- La respiration prolongée des
fumées résultant des opérations de soudage/
coupage, à l’intérieur, d’un local clos, peut provoquer
des malaises et des dommages corporels. Aussi
convient-il d’observer les précautions suivantes:
a. Assurez en permanence une aération adéquate de
l’emplacement de travail en maintenant une ventila-
tion naturelle ou à l’aide de moyens mécaniques.
N’effectuez jamais de travaux de soudage ou de
coupage sur des matériaux de zinc, de plomb, de
beryllium ou de cadmium en l’absence de moyens
mécaniques de ventilation capables d’empêcher
l’inhalation des fumées dégagées par ces matériaux.
b. N’effectuez jamais de travaux de soudage ou de
coupage à proximité de vapeurs d’hydrocarbure
chloré résultant d’opérations voisines de
dégraissage ou de pulvérisation. La chaleur
dégagée ou le rayonnement de l’arc peut déclencher
la formation de phosgène -- gaz particulièrement
toxique -- et d’autres gaz irritants, à partir des
vapeurs de solvant.
c. Une irritation momentanée des yeux, du nez ou de la
gorge constatée au cours de l’utilisation de
l’équipement dénote un défaut de ventilation.
Arrêtez-vous de travailler afin de prendre les
mesures néces- saires à l’amélioration de la
ventilation. Ne poursuivez pas l’opération entreprise
si le malaise persiste.
d. Certaines commandes comportent des canalisations
où circule de l’hydrogène. L’armoire de commande
est munie d’un ventilateur destiné à empêcher la
formation de poches d’hydrogène, lesquelles
présentent un danger d’explosion; ce ventilateur ne
fonctionne que si l’interrupteur correspondant du
panneau avant se trouve placé en position ON
(Marche). Veillez à manœuvrer cette commande en
vérifiant si le couvercle est bien en place, de façon à
assurer l’efficacité de la ventilation ainsi réalisée. Ne
jamais débrancher le ventilateur.
e. Les fumées produites par l’opération de soudage ou
de coupage peuvent s’avérer toxiques. Aussi est-il
nécessaire de disposer en permanence d’un
dispositif adéquat de ventilation de type aspirant,
afin d’élimi-ner du voisinage de l’opérateur tout
dégagement de fumée visible.
f. Consultez les recommandations particulières en
matière de ventilation indiquées à l’alinéa 6 de la
norme Z49.1 de l’AWS.
5. ENTRETIEN DE L’ÉQUIPEMENT-- Un équipement
entretenu de façon défectueuse ou inadéquate ris-
que non seulement de réaliser un travail de
mauvaise qualité mais, chose plus grave encore,
d’entraîner des dommages corporels graves, voire
mortels en déclenchant des incendies ou des chocs
électriques. Observez par conséquent les
précautions suivantes:
a.Efforcez-vous de toujours confier à un personnel qua-
lifié l’installation, le dépannage et l’entretien du poste
de soudage et de coupage. N’effectuez aucune
réparation électrique sur l’équipement à moins d’être
qua-lifié à cet effet.
b. Ne procédez jamais à une tâche d’entretien
quelconque à l’intérieur du poste de soudage/
coupage, avant d’avoir débranché l’alimentation
électrique.
c. Maintenez en bon état de fonctionnement les câbles,
le câble de masse, les branchements, le cordon
d’alimentation et le poste de soudage/coupage.
N’utilisez jamais le poste ou l’équipement s’il
présente une défectuosité quelconque.
d. Prenez soin du poste de soudage et de coupage et
des équipements accessoires. Gardez-les à l’écart
des sources de charleur, notamment des fours, de
l’humidité, des flaques d’eau maintenez-les à l’abri
des traces d’huile ou de graisse, des atmosphères
corrosives et des intempéries.
e. Laissez en place tous les dispositifs de sécurité et
tous les panneaux de l’armoire de commande en
veillant à les garder en bon état.
f. Utilisez le poste de soudage/coupage conformément
à son usage prévu et n’effectuez aucune modifica-
tion.
6. INFORMATIONS COMPLÉMENTAIRES RELATIVES
À LA SÉCURITÉ--
Pour obtenir des informations complémentaires sur
les règles de sécurité à observer pour le montage et
l’utilisation d’équipements de soudage et de
coupage électriques et sur les méthodes de travail
recommandées, demandez un exemplaire du livret
N° 52529 “Precautions and Safe Practices for Arc
Welding, Cutting and Gouging” publié par ESAB.
Nous conseillons également de consulter les publica-
tions sui-vantes, tenues à votre disposition par
l’American Welding Society, 550 N.W. LeJuene
Road, Miami, FL 32126:
a. “Safety in Welding and Cutting” AWS Z49.1
b. “Recommended Safe Practices for Gas-Shielded Arc
Welding “AWS A6. 1.
c. “Safe Practices for Welding and Cutting Containers
That Have Held Combustibles” AWS-A6.0.
d. “Recommended Safe Practices for Plasma Arc Cut-
ting” AWS-A6. 3.
e.“Recommended Safe Practices for Plasma Arc Weld-
ing” AWS-C5. 1.
f. “Recommended Safe Practices for Air Carbon Arc
Gouging and Cutting” AWS-C5. 3.
g. “Code For Safety in Welding and Cutting”
CSA-Standard W117. 2.
9/97
levage, des câbles de grue ou divers chemins
électriques.

7
EQUIPMENT SUPPLIED
PACKAGESAVAILABLE
Each Package includes:
PT-34, 75°Torch w/ 15-ft. lines ......................... 37886
WorkCable,12-1/2-ft ..................................... 680950
Description
plugs into standard 115 V outlet
portable - 60 lbs (27 kg)
cuts practically any sheet metal up to 1/8” (3mm) thick
low ripple for finer cuts
proven patented PT-34 torch - 15 feet (3.8m)
spare parts kit
1 year warranty
30% duty cycle at rated output - fan cooled
overtemperaturelight
SPECIFICATIONS
HANDY PLASMA 125
Input Voltage........................115 V, 60 Hz, 1 Phase
Input Current @ rated load ............... 20 A@ 115 V
Output Rating .......................... 11 amps - 100 volts
Open Circuit Voltage...................... 290 V DC max.
Dimensions:
Weight .............................................. 60 lbs (27 kg)
SECTION 1DESCRIPTION
SECTION 2EQUIPMENT
PT-34 Torch
Shipping Wgt. ....................................... 2 lbs (1 kg)
Length of Service Lines .........................15’ (3.8 m)
Dimensions:
Notethehigh open-circuitvoltage.Use onlyplasma
cutting torches designed for this equipment. Do
NOT attempt to use this equipment with any pro-
cess other than plasma arc cutting.
75oTORCH
2 1/4"
(57mm)
5 1/4"
(133mm)
Torch Guide Kit ..............................................604609
OPTIONALACCESSORIESAVAILABLE
Wheel Cart Kit Kit .................................. 0558001444
Optional Wheel Cart Kit -
Roll the Handy Plasma
aroundthejobsitewithease.
Torch Guide Kit -This complete
kit, in a rugged plastic carrying
case, includes attachments for
circle and streight line cutting on
ferrous and nonferrous metals.
2-HeatShield,P/N20282
4- Nozzle Tip, P/N 37887
2-O-ring,P/N 950790
Optional Torch Spare Parts Kit P/N 37918 contains:
1-O-RingLube, P/N 17672
2- Electrode, P/N 37888
1- Swirl Baffle, P/N 18785

8
INSTALLATION
Proper installation can contribute materially to satis-
factory and troublefree operation of the cutting pack-
age. It is suggested that each step in this section be
studied carefully and followed as closely as possible.
A. INSPECTION AND PLACEMENT
1. Havingremovedtheshipping containerinspectfor
evidence of concealed damage which may not
have been apparent upon receipt of the unit. No-
tify the carrier of any defects or damage at once.
2. Checkthecontainer for any loose parts. Check air
louvers on all panels of cabinet and holes through
thebaseare freeofany packingmaterials thatmay
obstruct air flow through the power supply.
3. Thecomponentsinthe HANDYPLASMA125 con-
soleare:maintainedatproperoperatingtempera-
tures by fan cooling. Air is drawn in through the
rear panel and then out the louvers in the front
panel. Locate the power supply in an open area
where air can circulate freely through the open-
ings.Allow at least one foot of clearance between
the power supply and wall or any other obstruc-
tion. The area around the power supply should
be relatively free of dust, fumes, and excessive
heat.
B. PRIMARY INPUT ELECTRICAL CONNECTION
Precautionary measures should be taken to pro-
vide maximum protection against electrical shock.
Be sure that all power is off by opening the line
(wall) disconnect switch and by unplugging the
power cord to the unit when connections are made
inside the power supply.
1. TheHANDYPLASMA125isequippedwitha10-ft.,
3-conductor input power cable with a 115V plug.
Plug into standard 115 volt outlet.
SECTION 3INSTALLATION
Fig. 3.1 - Handy Plasma 125 Interconnection Diagram
115V
20 amps
WORK CABLE (12-1/2’)
WORK
PT-34 TORCH w/15’ Lines
Earth Ground

9
2. Extension cables may result in excessive voltage
drop. Use only industrial grade 16 to 10 awg. ex-
tension cables.
Input voltage to machine must be a minimum of
95 volts while operating.
C. SECONDARY (OUTPUT) CONNECTIONS (Re-
fer to Figure 3.1)
Before making any connections to the power sup-
ply output terminals, make sure that all primary in-
put power to the machine is deenergized (off) and
that input power cable is unplugged.
Clamp the work cable to the workpiece. Be sure the
workpiece is connected to an approved earth ground
with a properly sized ground cable. (See figure 3.1.)
D. ADJUSTMENTS & OPERATIONS
CAUTION: Never, under any circumstances, operate
thepowersupplywith the cover removed.
In addition to the safety hazard, improper
cooling may cause damage to internal
components. Keep side panels closed
when unit is energized. Also make sure
you are adequately protected before you
start cutting-protective helmetandgloves
should always be worn. Refer to page 2
for additional operating precautions.
A. TORCH ADJUSTMENTS
Make sure power switch on console is in OFF po-
sition and unplug the input power cable.
Withthetorch front endfacingup,assemble electrode,
swirl baffle, tip, and heat shield (supplied with Torch
Spare Parts Kit) in that order as shown in Figure 3.2.
(Electrodeisreversible andtheswirl baffleis symmetri-
cal.They can beassembledeitherway.)Applysilicone
grease to 0-ring.(See Figure 3.2)
Tighten heat shieldsnuglytohold the partsin firm con-
tactwith eachotherandto thetorchhead.Do not over-
tighten the heat shield.
The front end of the torch contains a gas flow check
valvethatactsinconjunctionwith thecircuitryprovided
in the power supply. This patented system provides a
safety interlock preventing the torch from being acci-
dentally energized with high voltage when the heat
shield is removed and the torch switch is accidentally
closed.
B. HANDY PLASMA 125 CONTROLS & ADJUST-
MENTS (See Fig. 3.3)
1. Power Switch - When placed in ON position, the
cooling fan will run.
2. Power Light -Willglowwhite to indicatethatelec-
trical current has energized the system.
3. Overtemperature Light - Will glow amber under
thefollowingconditions andcontactorwillbe deen-
ergized, when Duty Cycle has been exceeded.
SECTION 3INSTALLATION
Fig. 3.2 - Assembly of PT-34 Torch Front End Parts
Fig. 3.3 - Controls on Handy Plasma 125 Console
HEAT SHIELD
SWIRL BAFFLE
ELECTRODE
TORCH
NOZZLE (TIP)
O-RING
OVERLOAD LIGHT
(AMBER)
POWER SWITCH
The following sizes should be acceptable:
25 ft. extension - 16 awg. minimum
50 ft. extension - 14 awg. minimum
100 ft. extension - 12 awg. minumum
150 ft. extension - 10 awg. minimum
Greater than 150 ft. not recommended!
POWER LIGHT

10
a. The duty cycle of this unit is 30% at rated out-
putcurrent. Dutycycleisbased ona10minute
cycle; therefore, the unit can operate for a to-
tal of 3 minutes and shut off for cooling a total
of 7 minutes in a 10 minute period.
OPERATION
Wear the usual protective gloves, clothing and hel-
met. Helmet with filter lens shade No. 6 to 8 should
provide adequate protection.
Never touch any parts forward of the torch handle
(tip, heat shield, electrode, etc.) unless the power
switch is in the OFF position.
Do not depress the torch switch unless the torch
tipistouching orwithin0.020-in. (lessthan 1/32-in.)
of the workpiece.
CAUTION:Locate the console at least 10-ft. from the
cuttingworkarea.Chips and hot slag,from
thecuttingoperation,can damage thecon-
sole.
Afterpluggingin the inputpowercable,and turning the
power swithc on:
1. Touchthetipofthetorch totheworkpiece (orwithin
0.020 in. of the workpiece) holding the torch at
about 15- 30oangle to avoid damaging the tip.
2. Depress the torch switch. (Air should begin flow-
ing and H.F. should come on.)
3. Two seconds after depressing torch switch, the
plasma arc will start cutting.
4. After starting the cut, the tip can be dragged along
the workpiece.
D. OPERATING TECHNIQUES
1. Piercing - Thin materials may be pierced with the
torchtouchingthe work.Whenpiercing thickerma-
terials(upto1/8-in.) immediately raise thetorchto
1/16in.standoff afterinitiating the cuttingarc.This
willreducethechance ofspatterentering thetorch
and prevent the possibility of welding the tip to the
plate.Thetorchshouldbeangledatabout30owhen
starting to pierce, and then straightened after ac-
complishing the pierce.
2. Grate Cutting - For rapid restarts, such as grate
or heavy mesh cutting, keep torch switch de-
presseduntilentire cutting operationiscompleted.
This avoids the 2 second preflow portion of the
cutting cycle.
E. COMMON CUTTING FAULTS
Listed below are common cutting problems followed
byprobablecause of each.Ifproblemsare determined
to be caused by the HANDY PLASMA 125, see your
ESABrepresentative.
1. Insufficient Penetration.
a. Cutting speed too fast.
b. Damaged cutting tip.
c. Improper air pressure.
2. MainArc Extinguishes.
a. Cutting speed too slow.
3. Dross Formation. (In some materials and thick-
nesses, it may be impossible to get dross-free
cuts.)
a. Cutting speed too fast or too slow.
b. Improper air pressure.
c. Faulty tip or electrode.
4. Double Arcing. (Damaged Tip Orifice.)
a. Low air pressure.
b. Damaged cutting tip.
SECTION 4OPERATION
Fig. 4.1 - Effect of Cutting Speed
CORRECT
TOO FASTTOO SLOW

11
c. Loose cutting tip.
d. Heavyspatter.
5. UnevenArc.
a. Damaged cutting tip.
b. Electrode worn or damaged.
6. Unstable Cutting Conditions.
a. Incorrect cutting speed.
b. Loose cable or hose connections.
c. Electrode and/or cutting tip in poor condition.
A. INSPECTIONAND CLEANING
Frequent inspection and cleaning of the HANDY
PLASMA 125 console is recommended. Some Sug-
gestions for inspecting and cleaning are as follows:
Make sure the power is shut off.
1. Check heat shield on torch. It should be replaced
if damaged.
2. Check the torch electrode and cutting tip for wear
every 1 or 2 hours of operation.
3. Make sure cable and hoses are not damaged or
kinked.
4. Make sure all plugs, fittings, and ground connec-
tions are tight.
5. With all input power disconnected, and wearing
proper eye and face protection, blow out the in-
sideofthecuttingpower supplyusinglow-pressure
dry compressed air.
SECTION 4OPERATION
7. Main Arc Does Not Strike.
a. Loose connections.
8. Poor Consumable Life.
a. Improper gas pressure.
If this equipment does not operate properly, stop
work immediately and investigate the cause of the
malfunction.Maintenancework mustbeperformed
by an experienced person, and electrical work by
a trained electrician. Do not permit untrained per-
sons to inspect, clean, or repair this equipment.
Use only recommended replacement parts.
SECTION 5MAINTENANCE
B. TROUBLESHOOTING
Be sure that all primary power to the machine has
been externally disconnected. Unplug before at-
tempting inspection or working inside of the power
supply.
Check the problem against the symptoms in the fol-
lowingtroubleshootingguide.Theremedymaybequite
simple. If the cause cannot be quickly located, shut off
theinputpower,open uptheunit, andperformasimple
visual inspection of all the components and wiring.
Checkforsecureterminalconnections, looseorburned
wiring or components, bulging or leaking capacitors,
or any other sign of damage or discoloration.
Voltages in plasma cutting equipment are high
enough to cause serious injury or possibly death.
Be particularly careful around equipment when the
covers are removed.

12
SECTION 5MAINTENANCE
2. No Air
C. TROUBLESHOOTING GUIDE
1. Difficult Starting
Change electrode
Change Tip
Check for clean ground connection
Check air flow
Check torch power cable for continuity
Yes
Power
supply
defective
No
High freq. unit
or compressor
defective
Depress torch switch. Compressor and
high freq. should be seen or heard.
Does high freq. come on with torch switch?
No
Check
continuity
of torch switch
Yes
No electrode in torch
Electrode too short
Replace electrode
Compressor Defective
Defective
torch switch
No
Power supply
defective
OK

13
4. Amber overtemperature light turns ON while cutting.
3. Air does not shut off.
SECTION 5MAINTENANCE
Does arc start when tip contacts work without depressing torch switch?
No
Yes
Check for
short in
torch switch
Cuts normally when torch switch is depressed?
Yes
Power
supply
defective
No
Defective
control PCB
Defective
Thermal
Switch
No
Is the fan running?
No
Yes
Run unit
on idle for
10 minutes
Normal
Duty Cycle
exceeded
OK
Yes
Defective
fan motor
No
Clear
restrictions
Are there any restrictions or foreign matter?

14
SECTION 6INSTALLATION, OPERATION AND MAINTENANCE OF PT-34 TORCH
!WARNING ELECTRIC SHOCK CAN KILL.
75oTORCH
2 1/4"
(57mm)
Fig. 6.1 - Dimensional Data PT-34 Torch
Plasma cutting uses high voltage. Skin contact
with the torch, the power source, the workpiece
or any grounded object MUST BE AVOIDED
whenever the power source is ON.
Using the torch on any power source not
equipped with a flow switch safety interlock may
expose operator to unexpected high voltage.
INTRODUCTION
The patented PT-34is a manual torch with a 75ohead
designedforuse withseveralPlasmaArcCuttingPack-
ages using clean, dry air as the plasma gas.The ser-
vice lines are 15 feet long and the torch is rated to
operate up to 50 amperes at 100% duty cycle for cut-
ting most metals.
Make sure power switch on the power source is in
the OFF position and PRIMARY INPUT POWER is
DEENERGIZED.
Theseatcomesassembledto thefrontend ofthetorch.
Make sure seat is tightened firmly with a wrench but
do NOT overtighten.
Withthetorchfront endfacingup,assemble electrode,
swirl baffle, tip and heat shield in that order as shown
in Figure 6.2 (Standard electrode is reversible and the
swirl baffle is symmetrical.They can be assembled ei-
ther way.)
!WARNING
A. INSTALLATION & OPERATION
Followallinstructionsintheappropriatebookletpacked
with your Handy Plasma package. DO NOT install or
attempt to operate this torch without following these
instructions.
!WARNING
BE SURE to install the swirl baffle in the torch.
Failure to do so would allow the nozzle (tip) to
contact the electrode. This contact would permit
high voltage to be applied to the nozzle. Your
contact with the nozzle or workpiece could then
result in serious injury or death by electric shock.
5 1/4"
(133mm)
The PT-34 torch head contains a gas flow check
valve that acts in conjunction with the switch and
circuitrywithinthe powersource. Thissystem pre-
ventsthetorch frombeing energizedwithhigh volt-
age if the torch switch is accidentally closed when
the shield is removed. ALWAYS REPLACETORCH
WITH THE PROPER TORCH MANUFACTURED BY
ESAB SINCE IT ALONE CONTAINS ESAB'S PAT-
ENTED SAFETY INTERLOCK.
B. MAINTENANCE
Before any maintenance is attempted on this torch,
make sure the POWER SWITCH on the power source is
in the OFF position and the PRIMARY INPUT POWER is
DEENERGIZED.
!WARNING
!WARNING
Tightenheatshield snuglytohold thepartsinfirmcon-
tact with each other and the torch head. Do not over-
tighten the heat shield.
1.Todisassemblethefrontend, hold the torchwiththe
shield in an upright position as shown in Figure 6.2
This will prevent the nozzle, electrode, and swirl
baffle from falling free when the shield is removed.
To replace anyof these parts,assemble as directed
in Section III.
The gas flow check valve is part of the safety inter-
lockand ispermanently assembledinthetorchhead.
The head must be replaced if this valve malfunc-
tions. The light spring force used to close the ball
check can be felt by pushing on the electrode when
assembling the front end components.
2.Periodicallycheck theheatshield,electrode, nozzle,
and swirl baffle.Replace if worn or damaged.
3.NOTE-THE ELECTRODE ISREVERSIBLE.When
one end is worn, the electrode can be reversed.

15
SECTION 6INSTALLATION, OPERATION AND MAINTENANCE OF PT-34 TORCH
Donotcontinueto use oneendallowingit to erodetoa
length shorter than 3/8-in.as shown in Figure 6.3.The
electrodeopensthegas flow check valve.Ifoneendis
continually used, it will be too short to open the valve
when reversed.
4. Apply a small amount of lubricant P/N 17672 to the
heat shield as shown in Figure 6.3 or to the O-ring.
CheckO-ringfordamage whenever the shieldisre-
moved. Replace if necessary. (O-ring P/N 950790
is also supplied in spare parts kit.)
Fig6. 2 - Front End Assembly
3/8"
MIN.
LUBRICANT CAN BE
APPLIED TO O-RING OR
HEAT SHIELD
Fig. 6.3 - O-ring and Electrode Maintenance
ELECTRODE
EACH END CAN BE USED
UNTIL IT WEARS TO 3/8"
LONG.
HEAT SHIELD
SWIRL BAFFLE
ELECTRODE
TORCH
NOZZLE (TIP)
PT-34
5.Thepower cableandswitchleads in the service line
should be inspected periodically. If there are any
cuts through the protective sheath or if gas leaks
are noted, replace the damaged component.
By following steps 1, 2, and 3 in Figure 6.5 the service
line can be removed from the torch. To disassemble
the service line, lay the line out straight, remove the
tape from around the switch lead splices, and free the
switch by cutting the leads close to the splices. (Re-
placement switches have extra long leads to make up
for any loss due to cutting.) Remove the rubber boot
from the inlet end of the cable and remove the tape
that secures the sheath at each end. Pull the sheath
off the cable (over small fitting at torch end).Note that
the switch leads wrapped around the power cable are
secured with tape several places along the cable.The
leads, switch cord plug, and strain relief can now be
removed.DONOTremove the white tapethatformsa
band around the power cable at each end.The sheath
is taped to the cable in front of the band which acts as
a shoulder to prevent the sheath from sliding back on
the cable. (Replacement cables have this tape in
place.) If the switch leads are to be replaced, replace
with 16 AWG STRANDED COPPER, 600-VOLT, 90m
C INSULATED WIRE. Reassemble in reverse order.
6.To reposition the switch on the torch, slide the flex
supportback,removethetape securing the spliced
leads to the power cable, reposition switch, retape
the leads, and pull the flex support back in place.
NOTE: A thin film of silicone lubricant P/N 17672 ap-
plied inside of the flex support will ease the
assembly of this part.

16
SECTION 6INSTALLATION, OPERATION AND MAINTENANCE OF PT-34 TORCH
Included with POWER CABLE SHEATH ASSY. (50-FT.) - 19027
Fig 6.4 - PT-34 Torch Assembly, P/N 37886 (15 ft. lines)
CONSUMABLES
Torch is completely assembled from the factory. Additional parts areincludedwith spare partskit No. 37918 - or may be purchased seperately.
ELECTRODE 37888 (multiples of 2)
SWIRL BAFFLE 18785
NOZZLE (Tip) 37887 (multiples of 5)
HEAT SHIELD 20282
SEAT - 19679
(Included with Head)
750HEAD - 20072 (Includes, Ring and Seat)
POWER CABLE
HANDLE - 18208
SWITCH BAND - 18207
SWITCH - 18224
(2) SPLICES (Supplied with Switch)
FLEX SUPPORT - 18225
SHEATH
5/8 X 18 L.H.
STRAIN RELIEF - 18226
1/4 Fast On
19675 (15 ft.)
19672 (15 ft.)

17
SECTION 6INSTALLATION, OPERATION AND MAINTENANCE OF PT-34 TORCH
Fig. 6.5 - Power Cable and Switch Disassembly Sequence
!WARNING
BESUREtotightenfittingssecurelyusing2wrenches during reassembly. (Factory recommended torque is 30 in-lbs). Failure to do so could result in serious injury to the operator.
Pull flex support back. Remove tape holding splices. 1
2
3
Slide switch and band from handle. Snip leads at splice to replace switch.
Unscrew handle and power cable from head

18
SECTION 7REPLACEMENT PARTS
Figure 7.1 - Handy Plasma 125 (Internal Right Side View)
BUSHING, SNAP - 634818
POWER SWITCH - 634518 SWITCH SEAL - 951474
POWER LIGHT, WHITE - 951526
OVER TEMP LIGHT, AMBER - 951815
SCREW PHTF 8-32 X .38 LOCK WASHER #8 FLAT WASHER #8
TERMINAL BUSHING - 13730583
SCREW PHTF 6-32 X .38
SCREW PHTF 10-32 X .50 WASHER, LOCK, EXT TOOTH #10
BUSBAR,TAB - 0558001163
CAPACITOR, (800mf 450 VDC) - 37858
HOSE ASSEMBLY - 0558001162
PRESSURE SWITCH - 0558001159
PLUG HOUSING (15 POS) - 951504
PC BOARD, LOGIC - 38168
COOLING FAN - 2046032
DIODE (BRIDGE RECTIFIER) - 37855
GROMMET (.212 ID) - 950518
GROMMET (0.63) - 92W57
SCREW PHTF 10-24 X .50 DECAL, GROUND - 2091558
FOOT, RUBBER - 182W12 SCREW PHTF 8-32 X .38
SCREW PHTF 8-32 X .38
SCREW PHTF 10-24 X .38
CAPACITOR, (120UF 240 VAC) - 37856
GROMMET (0.63) - 92W57 SCREW PHTF 6-32 X .38
WASHER, FLAT #6
RELAY, (DPDT 25A 120VAC) - 952577
(PL1)
(PL2)
(S1)
(K1)
(C1)
(BR1)
(PCB1)
(PCB1-P1)
(C2)
SCREW PHTF 8-32 X .63 LOCK WASHER #8 FLAT WASHER #8
TRANSFORMER
0558005244

19
SECTION 7REPLACEMENT PARTS
Figure 7.2 - Handy Plasma 125 (Internal Left Side View)
BUSHING, STRAIN RELIEF - 23606172
TERMINAL BLOCK (2 POS 20A) - 950487
SCREW PHTF 6-32 X .50 WASHER, FLAT #6
SCREW PHTF 6-32 X .25
SCREW PHTF 10-24 X .50 WASHER, FLAT #10
DIODE (BRIDGE RECTIFIER) - 37855
BULKHEAD ADAPTOR - 58V75
NUT, HEX 8-32 LOCKWASHER EXT TOOTH #8
COUPLING COIL (HIGH FREQ.) - 32969
ELBOW 1/4 NPT
BUSHING (SNAP) - 950823
SPARK GAPASSEMBLY - 0558001180
BUSHING (SNAP) - 639533
TRANSFORMER ASSEMBLY - 0558001212
RESISTOR - 17280025 RESISTOR - 17240225
AIR COMPRESSOR - 37857
(TB1)
(BR2)
(T3)
(T1)
(R2)(R1)
(M2)
POWER CORD (10 FT.) -0558001381
SWITCH TERMAN (131°F) - 950710
(TS1)
CAPACITOR - 0558005245

20
SECTION 7REPLACEMENT PARTS
LABEL, WARNING - 2091514
HANDLE - 951575
SCREW PHTF 10-24 X .38
LOGO,ESAB - 13734588
COVER - 37952Y
SCREW PHTF 10-24 X .38
LABEL, DANGER HIGH VOLTAGE - 954008
TORCH CABLE STRAIN RELIEF -
0558001157
LOCKNUT (1 in. CONDUIT) - 950435
TORCH - 37886
Figure 7.3 - Handy Plasma 125 (External View)