Kemppi Master S 400 Service Manual

Also see for Master S 400: Operating instructions Quick guide

Kemppi Master S 400 Service Manual Manual pdf 22 page image

Service manual Master S 400 and 500 Version 1.1 5.9.201420Kemppi Oy4.4. Final testingAfter the machine repair and low voltage tests, it is good practice to carry out some load tests and finishwith some test welds. Only then is it possible to guarantee the machine is working correctly.4.4.1. Load bank testCC (MMA and TIG machines) curve’s secondary voltage can be calculated when a certain current is set:MMA mode:2004,022  IUVoltage has to be set for the nominal curve to get the correct output power. E.g. when making a PTC testthe correct values must be used to meet the duty cycle specified in technical specification.Most useful tests to be made with a load bank are to check maximum and minimum current and paneldisplay values.The following example uses 140A so the correct voltage can be calculated using the equation below:VAIUAI6,252004,01402004,0140222Output voltage should be 25,6V.Example: MMA mode load bank test, welding current 140A and output voltage 25,6VTurn the machines main switch OFFConnect machine to the load bank and check that there is no load added.Turn the machines main switch ON,Adjust machine current to desired level (this example uses 140A)Add some load to get the inverter operate, be fast in switching because arcing may existbetween the connection surfaces of the switchMeasure load voltage by a DMMAdd or decrease load to get the desired voltageIf using active load bank, instead of increasing or decreasing load, it is only necessary to select MMAnominal curve and then set the test current value on the machine. The Load follows automatically thecurrent value and the output voltage will be correct.

/ 24

Related manuals for Kemppi Master S 400