Mill Power & Utility Load Schedule

How to read this sheet

Maximum demand here is a design figure built from declared load and diversity factors, not a measured one; a utility bills on the highest half-hour or fifteen-minute average it records, and a mill that starts departments together after a power cut can set a demand peak it then pays for all year, so the transformer spare margin is also a starting-sequence margin. Load factors should come from motor loading measured at a comparable mill rather than from the motor plate, because oversized motors are endemic in textiles and a 30 kW motor doing 18 kW of work reports a load factor of 60 percent, not 100. The specific energy this returns is the whole-mill figure including humidification and compressed air, which is the only basis on which published benchmarks are comparable, and it is the number a feasibility report should carry: where the two disagree, the load schedule is the one built from equipment and the benchmark is the one built from someone else’s mill. Capacitor requirement is the steady-state bank at maximum demand; harmonics from variable frequency drives are not modelled, and a mill with substantial drive load needs detuned reactors rather than plain capacitors, which changes both the cost and the achievable power factor. Generator sizing assumes the essential load can be picked up in stages - a set chosen on running kVA will not start a large motor across the line, and the transient rating is a supplier question this schedule does not answer. Above 5,000 kVA the transformer figure is rounded to a clean step and means more than one unit, which is a different single-line diagram and a different cost.