EX-TRAFIRE® SD plasma cutting systems have been engineered out of a fully conceptual design, in which all components have been optimized and perfectly coordinated to deliver a class beating performance.
INTEGRATED GRID CUTTING MODE
All EX-TRAFIRE® power sources feature an integrated GRID cutting mode which automatically switches between the pilot arc and the main arc. This feature removes the need to regenerate the arc when an air gap is reached, the arc remains in pilot arc mode until material is detected.
HIGHER POWER SUPPLY OUTPUT
The EX-TRAFIRE® 75 and 100SD plasma power supplies possess a unique attribute "Extraboost", supplying up to an incredible 220 VDC to the torch. The higher the voltage between the electrode and the cut material, the longer the arc will run without being extinguished or switched to the pilot arc mode, this assists when cutting in hard-to-reach areas, maintains the arc even when stretched for bevel cutting and gouging. The output power is not only related to the maximum current, but also to the voltage that the power supply can provide.
100% DUTY CYCLE
The duty cycle (DC) of a plasma power supply is one of the basic parameters that expresses the ratio of maximum possible cutting time to the total working time without the power supply overheating.
The EX-TRAFIRE®75SD features a massive 100% duty cycle, which makes it the flagship model not only among the Thermacut range of power supplies but even among competing power supplies. Normally an 80% duty cycle at full power equates to a top end power supply, many of the competitors power supplies fail to achieve anywhere near this value.
Thermacut power supplies are considerably lighter than competing power supplies. The EX-TRAFIRE®75SD weighs only 24 kg! Competing power supplies of a similar rated power output weigh about 32 kgs.
The EX-TRAFIRE® power supplies feature many safety elements. The most important feature is the system self-check after start-up. Inferior lower cost systems are not equipped with the same level of safety in mind.
- Self-check after system start-up, the power supply operating software checks for system malfunctions, the power remains disconnected until the analysis is completed and safe to use.
- Torch safety elements also include a "Cap Sensor". Checking for short-circuits between parts. Checking when the power supply is turned on and the torch switch is activated.
EX-TRAFIRE®75SD and 100SD offer a gouging feature. It is used for "Back Gouging" of weld seams,removal of old or defective welds. A more cost effective option compared to Air Carbon Arc Gouging.
The EX-TRAFIRE® SD series is an uncompromising professional range of plasma power supplies developed for the decerning metalwork artisan through to the trade professional. The build quality, performance and safety features outclass the cheap plasma power supplies made for occasional use but also portrayed as being suited to trade applications. Poor build quality, overheating (low duty cycle) and the lack of safety features are common issues with plasma power supplies purchased from various hobby markets, food supermarkets or less knowledgeable welding distributors. Thermacut® disassociates itself from supplying products that may endanger the well-being of the operator.
We also recommend another related article called "Criteria for selecting a suitable power supply" and "Package content of EX-TRAFIRE® sets".
Text: Thermacut, k. s.,
Photo: archive of Thermacut, k. s.