How the SAVAplug works
When the thermostat on a fridge or freezer switches on the motor to pump the refrigerant around the system, full power is required to start the motor. However, once the motor is running, full power is no longer needed. The SavaPlug senses this and reduces the flow of electricity to match the actual requirements. When the red light on the SAVAplug glows the device is energy saving as well as money saving.

Also, many fridges and freezers are still designed with unnecessarily large motors to provide a safety margin, and so produce even more waste.

The SAVAplug constantly monitors the motor load by comparing relative phase angles and the back electromagnetic field. At part-load, the apparent voltage to the motor is reduced by cutting the power up to 100 times every second, reducing magnetisation losses and drawing much less current. A report from the Cranfield Institute of Technology on the SAVAplug stated:

“In March 1991 a series of four experiments were completed using the SAVAplug and a typical domestic fridge-freezer and cabinet freezer. Although the experiments were limited, they showed average energy saving in the order of 19.5% but as high as 25.5% under one set of conditions. These experiments and the documentation presented by the company convinced us that the product can achieve the average 20% energy saving claimed.”

Microprocessor Applications Group
School of Information Technology
Cranfield Institute of Technology
Cranfield Bedford MK43 0AL
Telephone 01234 750111
Telex 825072 CITECH G

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Energy saving, conserving energy, money saving, saving money, Savawatt - SAVAplug fridge and fridge-freezer energy saving plug - ESSAVASAVA