AUTOMATIC LOW VOLTAGE SWITCH Russian patent published in 2007 - IPC H01H77/10 

FIELD: electric engineering.

SUBSTANCE: device has at least one fixed contact, rotating movable contact member having central casing having at least one first shoulder having active surface on the end, and at least one first cam-like surface and rotating supporting movable shaft supporting the contact member connected to mechanism for activating automatic switch. The first rotation center is attached to shaft supporting mobile contact and coupled with opening in central casing. Gearing means and at least one second rotation center are mounted on the shaft on mutually opposite sides with respect to the first rotation center. The second rotation center is movable relative to the shaft and movable contact. The first and second springs are attached to the second rotation center and to gearing means located along two opposite parties of a shoulder of mobile contact. The second center of rotation cooperates with the first surface similar to a cam, generating the mechanical moment coordinating mobile contact rotation direction for separating active surface from the fixed contact in short circuit state.

EFFECT: optimized switch operation performance.

8 cl, 8 dwg