ELECTRIC SWITCH POWER SUPPLY Russian patent published in 2008 - IPC H01H47/22 

FIELD: power supply for electric switch and its relevant power system.

SUBSTANCE: proposed electric switch 1 is inserted in current line 1 between AC supply E, better AC supply mains, and load L to interrupt power supply or to energize load. Switch is also connected to primary circuit W1 of transformer 3. Power required for switch control unit and probably for switch proper is taken off bypassing switch when it is in ON-position a and from transformer secondary circuit W2 through rectifier 4 when switch is in OFF-position during power supply to load L. Novelty is that transformer 3 is designed to function so that it saturates during every half-cycle of supply mains current and secondary-voltage saturation peaks (KP) of transformer secondary circuit W2, W2a, W2b are rectified to produce DC power when switch 1 is in OFF-position k.

EFFECT: reduced size.

22 cl, 5 dwg