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NeDCE
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Post subject: How in-depth do you go?  Posted: Fri Nov 14, 2025 9:47 am |
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Joined: Fri Mar 28, 2025 2:54 pm
Posts: 33
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Question based on some recent info-gathering I did:
How much detail do you all include when modeling a 480V VFD control cabinet in an industrial setting?
Let's say you have an 8'-tall VFD cabinet that's fed out of an MCC bucket. It in turn feeds a 150HP pump. In this order, the cabinet has: an incoming MCCB, a PF correction reactor, CTs with a digital overload trip unit (tied into contacts on the VFD), a strange 3-phase-to-9-phase transformer, a pulse rectifier, and the VFD. It may or may not have a capacitor bank as well for filtering. 3'-8' of conductors between each component.
How much of that would you typically model? In your experiences, how much of that affects the AFC or IE?
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bbaumer
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Post subject: Re: How in-depth do you go? Posted: Fri Nov 14, 2025 12:34 pm |
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Joined: Fri Jul 08, 2016 10:01 am
Posts: 441
Location: Indiana
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This thread and video explains my position on it. viewtopic.php?f=23&t=6024
_________________
SKM jockey for hire
PE in 17 states
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NeDCE
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Post subject: Re: How in-depth do you go? Posted: Fri Nov 14, 2025 1:03 pm |
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Joined: Fri Mar 28, 2025 2:54 pm
Posts: 33
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Somehow I missed this at the time. I'll watch it today.
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