Hydraulic drive device for electrical switchgear, has servo controller with valve providing hydraulic control of hydraulic delay element, where drive device and another drive device are in fluid connection with one another

摘要

The drive device (10) has a piston cylinder arrangement for operating circuit-breakers, electrical contacts and an auxiliary switch. A hydraulic drive is formed by the arrangement, and a servo controller (12) comprises a hydraulic delay element (14) and a 3/2-way valve (16). The drive device and another drive device are in fluid connection with one another, where hydraulic fluid flows through the drive devices. The controller with the valve provides hydraulic control of the element that is arranged in a housing and provided with two adjusting pistons (28, 34).