OPTeARC EWELD R700 & R900 MST

OPTeARC EWELD R700 & R900 MST multi-process welding power sources (cc/cv ARC/MMA/SMAW, TIG/GMAW, GOUGE/CAC, MIG/MAG/GMAW).

EWELD R700 MST £3490 GBP

EWELD R900 MST £4640 GBP

Discounts available for approved distributors, trade resellers, volume & export

Superior performance industrial machines constructed using the very latest Mitsubishi Hybrid chopper technology, this combines the performance advantages of inverter technology with the rugged reliability of transformer based machines.

Superb welding performance combined with the lowest power consumption & the longest life span makes these a better option to buying an inverter.

Please open the tabs below for further info.

Description

Description

OPTeARC EWELD R700 & R900 MST extreme performance multi-process machines 700A & 900A

CC/CV output.  

MMA arc welding, Carbon arc air gouging, MIG/MAG welding etc. Infinitely variable control of welding power. Super smooth stable welding arc makes these a joy to use. All electrode types including cellulose can be run with ease. Plug in a wire feeder & you have a great performing MIG/MAG machine. Simple to use no nonsense controls.

All models are manufactured to comply with BS EN 60974-1 & BS EN 60974-10

Also in full compliance with RoHS directive 2011/65/EU & weee directive 2012/19/EU

We guarantee to fully support these machines with spares & service for a minimum of 20 years, the best long term back up in the industry!

‘Invest in the best’ quality made British welding equipment. We guarantee you will be delighted!

Further reading – see tabs below.

OPTeARC EWELD MST- further info

OPTeARC EWELD MST- further info

OPTeARC EWELD MST power sources are British made industrial machines built using our unique Mitsubishi hybrid chopper technology. This design gives you all the performance benefits of a good inverter based machine with instant arc starts, a smooth superior arc & very low power consumption, but with the rugged reliable build of a transformer machine & dual voltage input for easy connection to any supply.

Due to the high efficiency of our OPTeARC technology the size, weight & input power are reduced by a massive amount compared with conventional machines. Furthermore these tolerate harsh operating conditions such as extreme temperatures, damp & dust & can be used outside in the rain. Internal construction is simple with minimal parts & only one control PCB, these machines will not fail in dirty or damp workshops like inverters do, they are not affected by fluctuations on input supply they keep welding reliably year after year. They are equally happy in any environment including industrial workshops, off shore, oil & gas, mobile welding, outside on construction sites etc. All models are generator friendly & will run from up to 100M extension cables.

Suitable welding processes.

Arc air gouging (CC) Very high output power & duty cycle make these models ideal for carbon arc gouging. The high OCV help maintains a consistent smooth arc regardless of length & built in anti-stick cuts the power in the event of a short down.

MMA Stick electrode welding, (CC) the high OCV of 88V allows all electrode types including cellulosic types 6010 etc to be welded with ease. Output amps can be set on the digital display prior to welding. The arc characteristics are superb with a super smooth weld & minimal spatter right through the range. Built in hot start gives an instant arc up. Built in anti-stick circuit cuts the output to minimum if the electrode shorts down, this prevents damage to the electrode & allowing the short to be cleared easily. Adjustable arc force can be set to give a more forceful arc & to prevent freezing of the rod into the puddle.

TIG welding, (CC) Lift arc technology gives perfect contamination free arc starts. Output amps can be set on the digital display prior to welding. TIG welding can be carried out with or without a torch switch. When used with a torch switch the output is only on when the switch is pressed allowing for controlled starts & finishes to each weld. If used without a torch switch the welding output is quickly reduced as it detects a long arc length to stop the arc promptly. The welding characteristic is superb, perfectly smooth, quiet & stable right through the range. The initial lift arc start current can be set to a higher value by adjusting the arc force so allowing for large tungsten electrodes to be used for heavy TIG welding applications.

MIG/MAG welding, (CV) Add a MIG wire feeder to the power source & you have a very capable MIG welding machine with superb welding performance, better than most conventional switched type MIG machines. Built in arc start circuit gives clean instant arc starts without ‘machine gunning’. Variable inductance control allows the welding arc to be tuned to suit every operator or application perfectly. Remote connection provides 24V supply for a wire feeder & remote control of the welding power. Connect the OPTeARC 4 roll drive feeder & have full control of welding volts & amps on the wire feeder with optional digital display on the wire feeder. Or alternatively connect an arc voltage wire feeder using only the welding cables, suitable models include our TECFEED 350i & TECFEED 450i models or other manufacturers such as LN25 etc.

SUB ARC welding, (CC/CV) Add a SUB ARC wire feeder & you have a capable SAW machine. Built in arc start circuit gives clean instant arc starts without ‘machine gunning’. Variable inductance control allows the welding arc to be tuned to suit every operator or application perfectly. Remote connection provides 24V supply for a wire feeder & remote control of the welding power.

Further reading

With so many different makes & models of machines on the market today it can be difficult to make the right decision when considering which industrial welding power source to buy. The main choice for high output power sources is between traditional transformer rectifier types & inverter types.

Traditional transformer power sources. The older technology transformer & transformer thyristor based machines are still available from a few quality US & European manufacturers. These have a reputation for solid build & good reliability. The drawback with this older technology is welding performance is limited, size & weight is very high & input power consumption is very high.

Inverter based machines. Inverter machines solve the problems associated with the older transformer machines. Welding performance is superior, portability is very good & power consumption is low. However, inverter based machines don’t have the rugged reliable build of a transformer based machine & are very complex in design with 1000’s of electronic parts on many PCB’s. The power electronics work at over 600V which is a difficult task for sensitive electronic parts. This combined with real world operating conditions like grinding dust, damp, drops etc means inverter machines tend to have a poor life span & are unreliable. Even the best US & European made machines suffer these problems & the low cost imported equipment has become virtually throw away items.

OPTeARC machines. Our unique hybrid chopper technology combines the best parts of the other two technologies. Chopper technology works like an inverter by controlling the output at high frequency, but it works directly on the low voltage welding output (80V), not the high voltage mains input side like inverters do. They also tolerate massive over voltages & unstable input supplies. And the electronics are far simpler with only one PCB & no microprocessor needed. This means they do not suffer the reliability problems associated with inverters. But you get the superior performance of the best inverter combined with the reliability of a transformer based machine. No big repair bills to worry about & an expected life span of 25+ years which no inverter gets anywhere close to! The superior energy efficiency of these models also means your running costs are kept to an absolute minimum.

So whats the drawback? Our OPTeARC machines are about half the size & weight of an old style transformer based machine but are heavier than a small inverter. So from a portability point they sit somewhere in the middle between inverter & traditional. Unless portability is your number one priority our OPTeARC hybrid machines tick more boxes than any of the other options.

Portability.

Standard models are fitted with 300mm puncture proof solid rubber wheels & steel centred caster wheels at the front. A pull out front handle allows the operator to lift & pull from the front like a barrow. With the large wheels fitted the machine stands 825mm above ground. The rear wheels are positioned to take the bulk of the weight with minimal operator effort. This gives great portability easily clearing small obstacles. The front handle retracts back. Lifting eye points allow easy lifting around sites.

 

EWELD R700 &R900 MST functions & features

EWELD R700 &R900 MST functions & features

Functions OPTeARC EWELD MST

 

Superior welding performance on MMA (stick)
All electrode capability including celulosic
Built in hot start circuit for instant arc up of electrodes
Infinite variable control of welding power.
Anti-stick circuit cuts power if electrode sticks for easy release.
Digital ammeter for EN1090 & other QC standards
Arc air gouging capability ✓ 
Remote current control socket ready to accept remote devices.
MMA variable Arc force function.
Lift ARC TIG function for perfect starts on DC TIG.
MIG/MAG welding function with super smooth arc & variable inductance.
24V output & remote weld volts for MIG wire feeder

 

Technical specs

Technical specs

Specifications – amperage output EWELD / MST
Input voltage (standard models) 400V 3 phase
Amperage range 700 model, 50-700A

900 model 50-900A

 

Duty cycle @ max output 60%

 

Output @ 100% duty cycle 700 model 540A

900 model 700A

 

 

Maximum no load volts (OCV) 88V
Input fuse size (D) 400V supply 45/63A – 700A

63/80A 900A model

 

Min generator size for up to ¾ power 22KVA – 700 model

30KVA – 900 model

 

Approx net weight 170kg – 700A

220kg – 900A

 

Approx case size all models        450mm W X 650mm L X 650mm H (+ running gear)

*Duty cycles & inputs are quoted at 40ºC;

 

Standard supply, options & accessories

Standard supply, options & accessories

Standard supply for all models;  400V 3phase input, 3M mains input lead, 3M work lead, blue panels, 300mm rear wheels, front casters, retractable pull/lift front handle & lifting points.


Options include; different input voltage, validation for EN1090, TIG HF functions & gas solenoid built in.

 


Accessories include; Electrode lead & holder, MIG wire feeder suitcase type 24V, MIG wire feeder suitcase type inline (across the arc), MIG torches, TIG torch options, remote control units, foot pedal with stop/start & variable amps,

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