Passive low-voltage disconnect protection power-saving composite set

The utility model discloses a passive low-voltage disconnect protection power-saving composite set. The passive low-voltage disconnect protection power-saving composite unit comprises a four-terminal star capacitor combination unit, a voltage-type electronic switch and an electromagnetic controller, wherein the four-terminal star capacitor combination unit consists of three equivalent capacitors connected with each other in a star-shaped manner; the neutral point of the four-terminal star capacitor combination unit is connected with one end of an electromagnetic coil of the electromagnetic controller; the other end of the electromagnetic coil of the electromagnetic controller is connected with one end of the voltage-type electronic switch; the other end of the voltage-type electronic switch is connected with a load zero line; the other ends of the three equivalent capacitors are respectively connected with one of three phase lines of a low-voltage power distribution network; and the electromagnetic controller