Automation Direct Stellar SR55 Series - Appendix D: Sizing an SR55 Soft Starter

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SR55 Series Soft Starter User Manual – 1st Ed, Rev F – 09/18/2019
Sizing an SR55 Soft StaRteR
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Table of ConTenTs
Appendix D: Sizing an SR55 Soft Starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D–1
SR55 Soft Starter Selection Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D–2
SR55 Soft Starter Overload Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D–3
SR55 Index Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D–3
Standard Overload Current Profile and Duty Cycle . . . . . . . . . . . . . . . . . . . . . . . D–4
Increased Starts per Hour – Derating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D–5
Derating Examples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D–6