Loading Data for the Kilcullen 38 kV Substation.

Loading data for the Kilcullen 38 kV Substation, courtesy ESB Networks.

 From the ESB Networks document 38 kV & 110 kV Station Special Load Readings. 

The table shows summer and winter loads in megawatt (MW) for transformers T41, T42 and T424.

MVA is megavolt-ampere, often seen quoted on generators, although domestic generators are usually rated in kVA (kilovolt-ampere). The base unit, the volt-amp (VA) is a measure of apparent power and is the product of volts and amps sourced or used. In AC equipment, not all of that apparent power is used, and real power is measured in watts (W), which is the product of volts and in-phase current. ESB Networks want us to use in-phase current, and the extent to which current is in-phase with voltage is given by the power factor of a load. Non-in-phase currents waste power in supply cables, so power-factor correction may be implemented. This is normally done for large loads such as motors in industrial settings, although domestic fluorescent lighting may also include power factor correction in the fittings to compensate for the inductive load caused by the ballast coils (known as inductors). The correction can simply be a component called a capacitor wired in parallel with the light, inside the housing.

Data courtesy ESB Networks.

Further Reading