Soft Starter Sizing for AC-53a and AC-53b Duty Ratings
How to read the AC-53a/AC-53b duty code, size the current ratio against FLC, and account for starts-per-hour so a soft starter does not trip on its rated duty.
8 min read
Technical
Duty Rating guides
Guides and notes on industrial electrical and automation parts: selection, wiring, settings and ordering.
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VFD Overload: Normal Duty vs Heavy Duty Ratings
A field guide to VFD Normal Duty and Heavy Duty overload current ratings — what the percentages mean, why the same frame gives less kW in HD, and how to...
9 min read
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