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  1. mjm4273

    Fusing for Soft Starter Problems

    Jraef, thanks for the great information. I tried to find the document you linked to via support.industry.siemens.com using their normally great search and I was unable to find it. How did you look it up? All I could find for my model number was the same references I've been working from. My...
  2. mjm4273

    Fusing for Soft Starter Problems

    Thanks for the input guys! I'm stuck between to fuse options. Siemens is not very forthcoming on alternatives that aren't their own. That being said, I have found that Class J fuses are the closest local approximation to semiconductor fuses that are branch rated. I've narrowed it down to these...
  3. mjm4273

    Fusing for Soft Starter Problems

    Also, I found out that my soft starter uses thyristors, which Mersen lumps in with rectifiers.
  4. mjm4273

    Fusing for Soft Starter Problems

    Scotty, Thank you for responding, especially with a European perspective! I'm in America and my customer is a dedicated europhile. Everything in this project is Siemens, so basically I need an IEC crash course to understand what these technical documents are describing. So do yo think a type gR...
  5. mjm4273

    Fusing for Soft Starter Problems

    Hello all! This is my first post after coming here for information for quite some time. I have a problem regarding the installation of a Siemens 3RW30 soft starter in a control panel. After extensively reading the manual and associated technical information, I have determined that I need to use...

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