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  1. kistenr

    Welder Current Measurement

    I am trying to measure the current on an Meibach Welder at our plant. The welder is used to weld stainless steel coils of max width 1500mm and gauge 2mm. The welder operates intermittently and current values vary across a wide range. I do not know what the exact current values are and what the...
  2. kistenr

    Current Impulse waveforms

    I am currently developing a test circuit to output a lightning current wave with a peak of 10kA. My problem is that in order to get the required characteristics of the wave ie. rise and fall times, I need a 0.3ohm resistor. I am not sure what type of material to use that would sustain a peak of...
  3. kistenr

    Is Lightning AC or DC?

    A lightning wave is defined by a t90%(time to 90% of peak) and t50% (time to 50% of peak). Typical lightning impulses are denoted as 8/20 microseconds or 1.2/50 microseconds where the first digit is the time to 90% and the second digit is the time to 50% of peak. After which the waveform, with...
  4. kistenr

    Health effects of SF6

    ABB has a good site pertaining to SF6 seeing that they have related products.
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