Rtech PLASMA 60HF User manual

www.r-techwelding.co.uk
Email: [email protected]
Tel: [phone] Fax [phone]
PLASMA 60HF
INVERTER PLASMA CUTTER
OPERATION INSTRUCTIONS

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Thank you for selecting the R-Tech Plasma 60HF Inverter Plasma Cutter
The Plasma 60HF has many benefits over traditional transformer plasma cutters,
including infinite power control, HF pilot start and HF pilot restart which is ideal for cutting
mesh etc , quick fitting cost effective torch, long life cost effective torch consumables and
a 60% industrial duty cycle
We want you to take pride in operating our Plasma 60HF as much pride as we have taken
in making this product for you. Please read all information in this manual before operation
PLEASE EXAMINE CARTON AND EQUIPMENT FOR DAMAGE IMMEDIATELY
When this equipment is shipped, title passes to the purchaser upon receipt from the courier.
Consequently all claims for material damaged in shipment must be made by purchaser against the
transportation company used.
Please record your plasma cutting equipment identification below for future reference. This information
can be found on data plate at rear of machine.
Product Plasma 60HF
Serial No. ___________________________________
Date of Purchase _____________________________
Where Purchased _____________________________
Whenever you request replacement parts or information on this equipment please always supply
information you have recorded above
This product is covered by 2 years parts and labour warranty, you are responsible for costs of shipping
unit to us, we will cover cost of returning item to you. External items, torch, earth lead etc are covered by
3 months warranty. Any faults/damage found caused by customer will be charged pro-rata.
Pay particular attention to the safety instructions we have provided you for your
protection
The level of seriousness to be applied to each section is explained below
WARNING
This statement appears where the information must be followed exactly to avoid serious personal
injury.
CAUTION
This statement appears where the information must be following to avoid a minor personal injury
or damage to this equipment.

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Introduction
The R-Tech Plasma 60HF is a member of our field acclaimed family of welding products.
Premium features include:-
1. Inverter power source – more efficient to operate, provides smoother weld
characteristics.
2. Infinite cutting power adjustment, allows fine tuning of cut characteristics
3. HF Pilot start – Enables easy arc start even on painted surfaces
4. HF pilot arc restart – ideal for cutting mesh etc
5. Digital amp meters
6. Quick fitting torch for easy torch fitment/replacement
7. Long life – Low cost torch consumables
8. 60% Duty cycle at 40 Amps @ 40ºC
Recommended Processes
The R-Tech Plasma 60HF is recommended for the plasma cutting processes within its output
capacity of 60 Amps DC
Equipment Limitations
The R-Tech Plasma 60HF is protected from overloads beyond the output ratings and duty cycle
as per machine specifications with thermostat protection of the output coils and rectifiers.
Cutting Capability – Duty Cycle
The R-Tech Plasma 60HF is rated at 60 Amps at 60% duty cycle on a ten minute basis. If the
duty cycle is exceeded a thermal protector will shut machine off until the machine cools.
Technical Specifications
MODEL PLASMA 60HF
Power Voltage 415V 3-Phase 50/60Hz
Input Current 12.5A
Rated Output Current 60 Amps
Current Adjusting Range 20-60 Amps
No-load Voltage 200V
Rated Duty Cycle 60%
Working Mode HF Start
A
ir Pressure 55 PSI
Max. Cutting Thickness (Clean cut mild steel) 17mm
Max. Cutting Thickness (Severance cut mild steel) 25mm
A
fter Flow Time 10 Seconds
Dimensions / Weight 620x260x550 mm / 30KG

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Safety Precautions
Read entire section before starting installation
WARNING!
Electric Shock can kill – Only qualified personnel should perform this installation. Turn off input
power at the fuse box before working on this equipment. Do not touch electrically live parts.
Always connect the machine to an earthed mains supply as per national recommended
standards.
Select suitable location
Place the plasma cutter where clean cooling air can freely circulate in and out of the front & rear
louver vents. Dirt, dust or any foreign material that can be drawn through vents into plasma cutter
must be kept to a minimum. Failure to observe these precautions can result in excessive
operating temperatures which can lead to plant failure.
Grinding
Do not direct grinding particles towards the plasma cutter. An abundance of conductive material
can cause plant failure.
Stacking
This machine cannot be stacked.
Transport – Unloading
Never underestimate the weight of equipment, never move or leave suspended in the air above
people. Use recommended lifting equipment at all times.
WARNING!
Falling Equipment can cause injury. Never lift plasma cutter with gas bottle attached. Never lift
above personnel.
Tilting
Machine must be placed on a secure level surface or on a recommended undercarriage/trolley.
This machine may topple over if this procedure is not followed.
Environmental Rating
The plasma power source carries the IP21S rating. It may be used in normal industrial and
commercial environments. Avoid using in areas where water / rain is around.

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Electrical Installation
WARNING!
ELECTRIC SHOCK CAN KILL
Machine grounding and High Frequency Interference Protection
This plasma cutter must be grounded to earth. See national electrical codes fro proper grounding
methods.
The high frequency generator being similar to a radio transmitter may cause interference to radio,
TV and other electronic equipment. These problems may be the result of radiated interference.
Proper grounding methods can reduce or eliminate this.
Radiated interference can develop in the following ways
1. Direct interference from welder power source
2. Direct interference from the welding leads
3. Direct interference radiated from feedback into power lines
4. Interference from re-radiation by un-grounded metallic objects.
Keeping these contributing factors in mind, installing equipment as per following instructions
should minimize problems.
1. Keep the welder input power lines as short as possible and enclose as much of them as
possible in metal conduit or equivalent shielding. There should be a good electrical
contact between this conduit and ground (Earth).
2. Keep the work and electrode leads as short as possible. Tape the leads together where
practical.
3. Be sure the torch and earth leads rubber coverings are free from cuts and cracks that
allow welding power leakage
4. Keep earth lead connection to work in good condition – Clean area on workbench where
earth clamp is situated on a regular basis.
Input Connections
Make sure the voltage, phase and frequency of input power is as specified on machine rating
plate located at rear of machine.
Have a qualified electrician provide suitable input power as per national electrical codes. Make
sure machine is earthed / grounded.
Make sure fuse or circuit breaker is correct rating for machine. Using fuses or circuit breakers

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smaller than recommended will result in ‘nuisance’ shut off from welder inrush currents even if
cutting at low amperages.
Failure to follow these instructions can cause immediate failure within the welder and void
machines warranty.
Turn the input power OFF at the mains switch & fuse box before working on this equipment.
Have a qualified electrician install & service this equipment.
Allow machine to sit for 5 minutes minimum to allow the power capacitors to discharge before
working inside this equipment. Do not touch electrically live parts
The Plasma 60HF Plasma Cutters require a 415V 3 Phase 50/60Hz supply. It requires an 12.5
Amp supply. It comes with a 3 metre mains cable attached.
Connect wires according to national coding.
Brown wire – Live
Blue wire – Live
Black Wire - Live
Green/Yellow Wire – Earth (Ground)
Connecting to a mains electrical supply
THIS MACHINE IS OF AN INDUSTRIAL SPECIFICATION AND MUST BE
FITTED TO A 16AMP 415V MAINS INPUT
Connecting to an Engine Driven Generator
If connecting this Plasma Cutter to an engine driven generator please
ensure the following
Minimum Generator KVA Output – 13.5 KVA continuous
Generator to be fitted with AVR (automatic voltage regulation)
DO NOT USE ON A GENERATOR WITHOUT AVR
Connecting to a generator without the above minimum requirements will in-
validate your warranty.

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Connections for Plasma 60HF
Rear Machine connections
Fig 1
1. Air pressure regulating knob
This regulates the air pressure as displayed in gauge on front of machine.
To adjust pressure pull knob upwards and turn to adjust pressure, once correct
pressure is obtained press down knob to secure.
2. Air pressure input
Screw supplied PCL fitting into regulator ensuring no air leaks
You can also fit other connectors to suit your needs
3. 2nd Earth connection
This can be used to earth the machine to workbench if you are experiencing
interference from the HF – Sometimes required when using CNC automated machinery

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- Not normally used
4. Mains input cable
Fit required plug as per your electrical installation
5. On / Off Switch
Turns machine On / Off
Front machine connections
Fig 2
1. Earth / Workpiece connector
Connect the earth lead (negative - ) to this connector.
Insert male connector into socket and twist clockwise until tight.
Secure other end of earth lead to Workpiece via the earth clamp.
2. Fuse holder – Pilot Arc Protection
Protection fuse for pilot arc start
3. Torch switch socket
Connect the torch switch plug (4 pin) and screw on retaining ring to secure
4. Pilot lead connector
Connect the ring terminal from torch. Un-screw retainer, fit ring terminal onto shaft and
refit retainer ensuring it is tight

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5. Torch power connector
Connect the main torch cable by screw clockwise until tight.
Controls and Settings
Fig 3
1. Air pressure gauge
This shows the air pressure as set by regulator at rear of machine.
This should be set to 55PSI when the test gas button is activated.
2. Amperage control knob
This adjusts the amperage (cutting power) from 20 to 60 amps
Note: LED display will show cutting amperage when you are cutting
3. L.E.D amperage display
When cutting this shows the actual cutting amperage, this allows the machine to be
calibrated to BS if required by your company
4. Test Gas / Cutting selector switch
When in the up position this is test gas mode, when setting air pressure switch to test gas
so you obtain actual air flow cutting pressure
When in the down position this is cutting mode, you can now start cutting
5. Auto / Standard switch
When in the down position this is in standard cutting mode, this is the normal operating
position for plasma cutting with a hand held and machine type torch