Tig torch duty cycle

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My weldcraft wp17 has a rating of 60% @ 150 amps DC (125 amps AC), and its a piece of junk.In my shopping for something else I found the CK150. It is rated at 100% @ 150 amps DC (150 amps AC).Then I noticed the CK100/130's which are rated at 100% @ 125 amps DC (125 amps AC) and 100% @ 130 amps DC (130 amps AC)I would much rather have a #9 torch than a #17, and the CK100 takes 125 amps of AC much better than the WP17 does, but how will it take 200 amps compared to how the WP17 does?Thanks.
Reply:AC amperage duty cycle will be largely dependent on how much balance you are running because the EP portion is what puts a ton of heat into the torch.  Forget about 200A unless you want to have to let the torch cool for a long length of time, assuming you don't cook your torch lead wire and/or torch. 1st on WeldingWeb to have a scrolling sig! HTP Invertig 400HTP Invertig 221HTP ProPulse 300HTP ProPulse 200 x2HTP ProPulse 220MTSHTP Inverarc 200TLP HTP Microcut 875SC
Reply:Thanks, I typically run 65-75% EN.  What I am mainly concerned with is if the CK100/130 can handle the same or more upper end as the 17.  Basically, if the 17 has a 10% duty cycle at 200 amps, does the CK100/130 have at least that, or do I need to go with the CK150?
Reply:Also, the majority of what I do in aluminum, the panel is set at 200 amps, for tacking.  As I weld and the part gets warm my amperage input drops off significantly.  I have never had anything (yet) that has required me to mash the pedal at 200 amps for the whole job.
Reply:Have you considered water cooling?  A 20 would be perfect for you and stay nice n cool.
Reply:Originally Posted by rlitmanHave you considered water cooling?  A 20 would be perfect for you and stay nice n cool.