International Journal of Academic and Applied Research (IJAAR)   Year: 2022 | Volume: 6 | Issue: 8 | Page No.: 41-44 Design and Construction of an Improved Automatic Voltage Switcher System for Cold Chain Rooms Download PDF Mwebaza Chriton, Mwanga David, Mukasa Paul , Okello Bonny, Kamuhanda Success, Martha Tusabe, Kemigisha Priscilla, Kibirige David, Kasango Ramadhan ,Makumbi David, Kanyana Ruth Abstract: The Automatic Voltage Switcher AVS works by monitoring the voltage for a short period to ensure the power has stabilized before re-connecting. The device has a start-up delay period to provide protection against power-back surges commonly experienced after resumption of power in a power cut situation. The Surge and spike protection is in place to basically ensure protection. However, the current AVS30 has only one output terminal hence one cannot connect two or more power extensions to it at the same time, has no fan or heat sink to dissipate heat. In this paper, a design of an improved Automatic Voltage Switcher is constructed and tested to help provide solution to the above mentioned differences. The improved design in this paper has one earthing shared by both the input and output terminal which reduces leakages. It also has two output terminal as compared to the original which has one output.