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GENERATOR SELECTION CONTENTS - Diesel Generator

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3. Rating Adjustments<br />

¨ Derate for High Ambient Temperature Section 4401<br />

¨ Derate for High Altitude Section 4411<br />

¨ Derate for Temperature Rise Restriction<br />

¨ Derate for Lagging Power Factor Below 0.8<br />

¨ Derate for Leading Power Factor Refer to Factory<br />

¨ Derate for Maximum Overload Condition<br />

¨ Derate for Maximum Voltage Dip Restriction<br />

¨ Derate for High Sustained Short Circuit Current Requirement<br />

¨ Derate and/or Special Build for Thyristor Type Load<br />

¨ Allowance for Future Growth<br />

¨ Derate for Voltages Higher than Normal Top Limit of Winding Refer to Factory<br />

¨ Derate for Voltages Lower than Normal Bottom Limit of Winding Refer to Factory<br />

¨ Allowance for Standby Duty only<br />

¨ Derate for Unbalanced Load Regulation<br />

¨ Final Steady State Machine Rating kW<br />

¨ Final Resultant Power Factor<br />

¨ Final Required kVA for Transient Performance<br />

¨ Final Required kVA for Short Circuit Performance<br />

¨ Frame Size Selection based on limited Rating<br />

4. Typical Test Data<br />

The following typical test figures are normally available on request:-<br />

¨ Open Circuit and Short Circuit magnetisation Curve<br />

¨ Regulation, Phase Sequence, Insulation Resistance and Megger<br />

¨ Heat Run<br />

¨ Efficiency Curves<br />

¨ Efficiency - by Summation of Losses<br />

¨ Waveform Analysis (Distortion, Deviation, T.I.F., T.H.F., Photograph)<br />

SECTION 4303<br />

January 1990<br />

Page 2

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