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PLASMA CUTTING AND GOUGING Plasma cutting equipment The output current (Amperage) of the power supply determines the speed and cut thickness capacity of the system. Most of these hand held systems are rated at under 100 Amps, for cutting materials under 16 mm (5/8”) thick. The main function of the power supply is to provide the correct energy to maintain the plasma arc after ionization.

The arc starting circuit uses compressed air to force back the electrode from the tip, creating an electric arc. This in turn, positively charges the air stream, creating a plasma arc. This method is referred to as “blowback“ technology. The Unitor UPC-1041 uses NO HIGH FREQUENCY to initiate the plasma arc. This is of great importance for shipboard use.

UPC-1041 Primary side input: Compressed air 6–7 bar 440 V 3-phase min. 20A slow fuse

4.04

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UPC-1041 Power source output: Max. current 100 A Working pressure:

5.0 bar

The torch serves as the holder for the consumable tip and electrode, and provides cooling to these parts. The tip and electrode constrict and maintain the plasma jet. The process generally uses a single gas (usually air or nitrogen) Air is the most widely used plasma gas, due to the fact that compressed air is readily available at most location and that it is cheap compared to single gases. Consumable parts life is acceptable (usually between 100 to 200 starts). The consumable part life depends largely on air quality that must be oil and water free.

UPC-310 TP

Primary side input:

Compressed air 4–79 bar 230/110 V 1-phase min. 16/32A slow fuse

UPC-310 TP Power source output: Max. current 30 A Working pressure: 3.5 bar