DIY inrush current limiter / softstarter скачать в хорошем качестве

DIY inrush current limiter / softstarter

This is an inrush current limiter to prevent that the fuses in the fuse box at home are blown. It's made with an Arduino Nano, a ACS712 30A current sense module and a 30 Amp relay (5V control) with a series resistor-element in the form of old heating elements. This altogether is build in an scraped housing of a heater. The original elements of this heater where broken. They are replaced by heating elements of 30 Ohm found in a table grill. When the Arduino measures a current of more than 1.0 Ampere then a counter starts, and after 3 seconds the Arduino closes the relay. The relay shorts the elements. When within the 3 seconds the current stops then the counter is reset again. Also when the relay is closed and the current drops below the 1.0 Ampere the counter is reset, and the relays is opened. It also acts a little bit as a softstarter.