Patent ID: 6201676
Filing Date: 2001-03-13
Classification: H01H

Abstract:
A hydraulic time delay device for coupling to a fault-sensing element in a circuit recloser, the time delay device comprising:a piston having an external connection and operable to move through a housing in the device to cause hydraulic fluid in the housing to flow out of the housing and into a passageway;a first adjustable orifice formed in the passageway to define an adjustable first fluid flow path through the passageway;an adjustable valve positioned to provide an adjustable second fluid flow path through the passageway; anda second adjustable orifice formed in the passageway to provide further adjustment of the second fluid flow path,wherein:a time delay of the time delay device corresponds to a time required to move the piston, andadjustment of the first orifice, the valve, and the second orifice affect the time required to move the piston.