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

Claim 12:
13. A testing system for a circuit breaker, comprising:
a truck carrying a circuit breaker, wherein said 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 that drives the actuator piston and moves the movable electrical contact between open and closed positions with the fixed electrical contact;

a test platform configured to support the truck carrying the circuit breaker in a contact testing position on the test platform, wherein the test platform comprises
a first laser circuit mounted on the test platform and positioned under the truck and aligned with the actuator piston of the circuit breaker when the truck is on the test platform in the contact testing position, and configured to emit a first optical beam and acquire displacement data of the actuator piston when the movable electrical contact is moved between the open and closed positions;
a second laser circuit mounted on the test platform and positioned under the truck and aligned with the breaker housing when the truck is on the test platform in the contact testing position, and configured to emit a second optical beam and acquire displacement data of the breaker housing when the movable electrical contact is moved between the open and closed positions; and

a controller coupled to the first and second laser circuits and configured to receive the displacement data of the actuator piston and breaker housing and determine electrical contact erosion within the circuit breaker based upon displacement data of both the actuator piston and breaker housing.