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This is a perplexingly complicated device that was/is heavily marketed by salesmen as an energy saving unit that will lower your electricity bill.
The design starts out in a very traditional manner by using a device called a buck transformer. This is a transformer with a mains voltage primary and a low voltage secondary that then gets put in series with the load and drops the voltage to it (or boosts it up if wired in reverse). Then it gets quite complicated with a bank of IGBTs (Insulated Gate Bipolar Transistors) which combine the ease of driving of a MOSFET with the ruggedness of a traditional bipolar transistor. Not rugged enough though apparently as they had all failed as a dead short between their emitters and collectors with leakage to the gate too.
I'm not sure if the design actually controlled the output voltage accurately or if it was just a soft cut-in and out to avoid sudden intensity changes of lighting. The unit is actually only rated for 8A with a peak of 20A and will bypass the transformer if the load gets too high or if the transformer gets hot.
This unit may require significant rewiring of a consumer unit to separate the heaviest loads like showers, cookers and water heaters from the controlled loads like lighting and general power. It requires its own 50A breaker and the power loops out the consumer unit and then back in to a bank of breakers for the controlled loads.
I'm a firm proponent of keeping domestic (home) installs as simple as possible to make things reliable and safe. This beast does not fit in that category.
At the end of the video I redesign the unit for ease of fitting and reliability and there's also a fake customer testimonial for authenticity. Ladies and gentlemen... I give you the Energy Saver 3000 plus.
Негізгі бет Inside a whole-house energy saver.
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