Contract load demand of a new facility in your workplace is 62 kVA and the load diversity may be taken to be 80%. A 65 kVA, 11000 V/415 V, 50 Hz, 3-phase transformer has been proposed for this facility.
engineering
Description
Contract load demand of a new facility in your workplace is 62 kVA and the load diversity may be taken to be 80%. A 65 kVA, 11000 V/415 V, 50 Hz, 3-phase transformer has been proposed for this facility. This transformer from ABC Ltd. guarantees a voltage regulation of 4.4% and 97% full load power efficiency at 0.8 lagging power factor. A continuous full load operation for a considerable period of time is expected every day. Full load power factor is 0.82 lagging. Utility side voltage can be considered to be well regulated at 11000 V. You have been tasked with finding out whether this transformer will be overloaded during this full load period and justify your conclusions with clear calculations and discussion to the senior engineering management.
You have been tasked with comparing the transformer from ABC Ltd. with a 65 kVA, 11000 V/415 V, 50 Hz,
3 - phase transformer from a different manufacturer, BCC Ltd. in terms of percentage voltage regulation and
power efficiency at the rated load. Load power factor may be assumed to be 0.8 lagging. Single phase
equivalent circuit parameters of this 3-phase transformer are given below.
