Eaton EMS Series Manual

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5 Appendix5.5 Adjustment factors for utilization categories58 Elektronischer Motorstarter EMS/Electronic Motor Starter EMS 04/15 MN03407009Z-DE/EN www.eaton.com5.5 Adjustment factors for utilization categoriesThe following adjustment factors refer to EMS electronic motor starters witha maximum load current of 9 A. By using the load current, the overcurrentfactor (see the data sheet for the relevant motor), and the 9-A derating curve,you can calculate the motor‘s maximum permissible rated operational current.Overcurrent factor I A /IN 1 1) 2 3 4 5 6 7 82) 9 10Adjustment factor K 1 1 1 1 1 0.96 0.83 0.72 0.64 0.581) Utilization category AC-512) Utilization category AC-53aExample 1 Example 2Motor with overcurrent factor(from motor data sheet)I A/IN = 8 Motor with overcurrent factor(from motor data sheet)I A/IN = 5Adjustment factor(from table above)K = 0.72 Adjustment factor(from table above)K = 1Maximum permissible load current at40 °C, not connected in series(from derating curve, EMS…-24VDC)I N = 9 A Maximum permissible load current at60 °C, not connected in series(from derating curve, EMS…-24VDC)I N = 4.0 AThe motor starter‘s maximumpermissible rated operational currentI N = 6.5 A The motor starter‘s maximumpermissible rated operational currentI N = 4.0 A

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