Calculate Size of Transformers Circuit Braker Fuse ~ NEC 450.3
This document discusses how to calculate the size of circuit breakers and fuses for transformers based on National Electrical Code (NEC) guidelines. It provides the calculations and tables to determine the maximum allowed ratings for overcurrent protection on the primary and secondary sides of a 1000KVA transformer with a 5% impedance that is unsupervised. The results are that the recommended size of the circuit breaker on the primary side is 350A and the fuse is 160A, while on the secondary side both are 2000A.
- Calculate Size of Circuit Breaker on Primary side of Transformer as per NEC 450.3
- Calculate Size of Fuse on Primary side of Transformer as per NEC 450.3
- Calculate Size of Circuit Breaker on Secondary side of Transformer as per NEC 450.3
- Calculate Size of Fuse on Secondary side of Transformer as per NEC 450.3
- Calculate Size of Transformer
- Calculate Transformer Full Load Losses.
Title : Calculate Size of Transformers / Circuit Barker / Fuse ~ NEC 450.3
Type : Microsoft Excel Spreadsheet (xlsx)
Size : 168 KB
