Power supply in Power Electronics Posted August 22, 2018 · Report reply On 6/26/2017 at 8:08 PM, Soldertraining said: A power supply is an electronic device which supplies electric energy to an electrical load. Can anyone tell me what is the minimum power required 1 ton AC. 1 The AC's power consumption depends on its star rating. Every 1 ton of cooling power (commonly known as heat removed by a 1 ton AC in one hour) is also expressed as 3516 watts. Hence 1.0 ton AC will be rated at at-least 3516 Watts A 1 Ton AC of 5-star rating consumes around 1000 to 1050 watts of power per hour, working at full capacity. A unit of power is termed as one KW and is 1000 watts. If the AC is installed for the domestic bedroom, it consumes up to 65% of the rated power input, in general.