Patent ID: 11860230
Assignee: JST POWER EQUIPMENT, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 23:
24. A method of operating a testing system for a circuit breaker, comprising:
positioning a truck carrying a circuit breaker into a contact testing position on a test platform, wherein the circuit breaker comprises,
a breaker housing,
a fixed electrical contact and a movable electrical contact mounted within the breaker housing, said movable electrical contact being movable between an open and closed position relative to the fixed electrical contact,
an actuator piston connected to the movable electrical contact and extending downward from the breaker housing and configured to connect to a drive assembly coupled to the actuator piston that drives the actuator piston and moves the movable electrical contact between open and closed positions with the fixed electrical contact;

acquiring displacement data of the actuator piston when the movable electrical contact is moved between the open and closed positions using a sensor circuit mounted on the test platform and positioned under the truck and aligned with the circuit breaker when the truck is in the contact testing position; and
receiving the displacement data within a controller coupled to the sensor circuit and determining electrical contact erosion within the circuit breaker.