Transformer with Real time Clock is provided with display LCD panel with 4-line and 20 characters per line with back light. The Transformer has a main program memory of 64 KB and data memory of 4MB to store about 40 days captured data at 30 minute interval or 20 days data at 15 minute interval. The Transformer is available with real time clock with a 20 year calendar and internal rechargeable back up. Transformer with Real time Clock offers an accuracy of class 0.5 in energy measurement.