Rtech PLASMA 50HF Manuale utente
www.r-techwelding.co.uk
Tel: 01452 733933 Fax 01452 733939
PLASMA 50HF
INVERTER PLASMA CUTTER
OPERATION INSTRUCTIONS
Version 2020-05 LT70
2
3
Thank you for selecting the R-Tech PLASMA 50HF Inverter Plasma Cutter
The PLASMA 50HF has many benefits over traditional transformer plasma cutters, including infinite power control,
HF contact start and 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 50HF 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
equipment identification below for future reference. This information can be found on data plate at rear of machine.
Product PLASMA 50HF
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 3years collect and return UK warranty, R-Tech will cover cost of collection, repair and return of
item to UK mainland (other areas are RTB). External items, torch, earth lead etc are covered by 3 months warranty. Any
faults/damage found caused bycustomer will be charged pro-rata.
Pay particular attention to the safety instructions we haveprovided you for your protection. The level of
seriousness to beapplied to each sectionis 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 50HF 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 meter
6. Quick fitting torch for easy torch fitment/replacement
7. Long life -Low cost torch consumables
8. 60% Duty cycle at 50 Amps @ 40OC
Recommended Processes
The R-Tech PLASMA 50HF is recommended for the plasma cutting processes within its output capacity of 50
Amps DC
Equipment Limitations
The R-Tech PLASMA 50HF is protected from overloads beyond the output ratings and duty cycle as per machine
specifications with thermostat protection of the output coils and rectifiers and is rated at 50 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
Power Voltage
Fuse rating
Rated Output Current
Current Adjusting Range
No-load Voltage
Rated Duty Cycle
Starting Mode
Air Pressure
Max. Cutting Thickness (Clean cut mild steel)
Max. Cutting Thickness (Severance cut mild steel)
After Flow Time
Dimensions
PLASMA 50HF
220/240V 50/60Hz
32Amps
50A
20-50A
200V
60%
HF Pilot Arc Start
75PSI
18mm
24mm
10 Seconds
390 X 190 X 290
5
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.
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!
ELECTRICSHOCKCANKILL
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 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
7
The PLASMA 50HF Plasma Cutters require a 240V 50/60Hz 1-Phase supply. It requires an 32A fuse. It comes with a mains
cable attached. Connect wires according to national coding.
Brown wire Live
Blue wire Neutral
Green/Yellow Wire Earth (Ground)
Connecting to a mains electrical supply
THIS MACHINE IS OF AN INDUSTRIAL SPECIFICATION AND MUST BEFITTED TO A
32AMP 240V MAINS INPUT - DO NOT RUN ON 13AMP PLUG –FAILURE TO RUN ON
CORRECT SUPPLY WILL IN-VALIDATE WARRANTY
Connecting to an Engine Driven Generator
If connecting this Plasma Cutter to an engine driven generator please ensure the
following
Minimum Generator KVA Output 12KVA 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 invalidate your
warranty.
8
Connections for PLASMA 50HF
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. 2
nd
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 - Not normally used
4. Mains input cable
Fit required plug as per your electrical installation
5. POWER On/Off Switch
Turns machine on and off, the switch illuminates when machine turn on
9
Front machine connections
Fig 2
1.Earth / Work piece connector
Connect the earth lead to this connector. Insert male connector into socket and twist clockwise until tight.
Secure other end of earth lead to work piece via the earth clamp.
2. FUSE
Pilot arc fuse
3. Torch power connector
Connect the main torch euro socket by locating and pushing in and the screw retainer clockwise until tight.
Note: The head of torch has a safety feature, the machine will not work if
protective shroud is removed.
10
Controls and Settings
Fig 1
1. Air pressure gauge
This shows the air pressure as set by regulator at rear of machine. This should be set to 75PSI when the test
gas button is activated.
2. Amperage control knob
This adjusts the amperage (cutting power) from 20 to 50 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
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
From 2017 this option is no longer fitted to machine
6. Indication of too low air pressure
The led will be light up when the air pressure is correct and ready for cutting, if the air pressure is too low the
LED will go out and the machine will not work. Adjust pressure to correct 75psi in test gas mode, led will light
up and you can resume cutting.
Indice
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