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Distribution transformer calculations – MS Excel Spreadsheet

Dyson
Dyson
Field: Electrical Standards
China

Four Fast Transformer Calculations

The distribution transformer calculations spreadsheet enables rapid computations for the following: ascertaining the MV/LV transformer rating, calculating the rating of the overcurrent protection device on the low - voltage side of the transformer, determining the prospective short - circuit current, and computing the sizes of natural ventilation openings required for the transformer room.

Determining the MV/LV Transformer Rating

Input Parameters:

  • Primary Rated Voltage (kV)

  • Secondary Rated Voltage (kV)

  • Maximum Demand Load (kW)

  • Corrected Power Factor

  • Transformer Type

  • Permissible Loading Percentage (%)

  • Nearest Standard Transformer Rating (kVA)

Calculating the Rating of Overcurrent Protection Device on the Low - Voltage Side of the Transformer

Calculating the prospective short - circuit current on the low - voltage side of the transformer

Calculating the sizes of natural ventilation openings required for the transformer room.

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