Refrigerator Protector Circuit | Refrigerator Compressor Failure Protector

Gadgets involving compressors like AC and refrigerators are particularly prone to sudden and intermittent Mains voltage breaks, but ironically don’t carry any built-in protection system. A simple automatic refrigerator appliance compressor failure protector circuit presented here looks impressive.

However, modern electronic devices like TVs, music systems, computers mostly come with built in voltage regulators which are able to tackle voltage fluctuations quite reliably and very seldom do they fail. Moreover brief voltage failures and quick successive voltage interruptions don’t bother them too much.

Surge Protector | Whole-House Surge Protector Circuit

AC Mains Surge Voltage

An AC mains surge voltage may be defined as an instantaneous rise of voltage that may normally take place due to voltage fluctuations. Such voltage peaks may remain for a very short duration of time, but still can be fatally dangerous to household electrical and electronic equipment.

A rise of voltage according to Ohm’s law would force an appliance or the connected load to draw an equivalent excess amount of current beyond the tolerance range of the particular gadget. Thus, a spike generated due to a surge voltage may instantly and permanently damage valuable appliances.

Normally electronic gadgets, like TVs and music systems, etc., are typically prone to the dangers of such voltage surges. Even though they are mostly armed with built-in protection systems like an SMPS voltage stabilizer/regulator, fuses, etc.. a sudden jolt created by a spike arising due to a voltage surge may cause critical parts to burn. Also quite alarmingly, expensive electromechanical devices like refrigerators, air conditioners, water pumps etc. are even at a greater risk with such power abnormalities. These units may be quite vulnerable to voltage malfunctions and generally “dislike” sudden changes in the input voltages and currents. A voltage surge not only causes deterioration in the condition of machine components but at times may even instantly burn the windings of the motor involved. Moreover repairing such equipment are rather costly and one may even prefer buying a new one than repairing at the involved high costs. In short, the consequence can result in a lot of unnecessary wastage of money and time.
There may be a number of sophisticated mains surge protector units available in the market; however the above situation can be effectively handled even through a very simple concept.

Circuit Description