Design of a Remote Racking Module for Racking Operation

Circuit breaker is a device used to disrupt the flow of current when an abnormal condition occurs in switchgear. Withdrawal-type circuit breakers have the provision for displacing the circuit breaker in and out of the switchgear compartment while inspection and maintenance operations. This paper discusses a new mechanism for displacing the circuit breaker during racking operation by stationing the operator at a remote location. The first part deals with the design of lead screw and variation of various thread parameters on the stress distribution and performance. The later part of the paper deals with the development and analysis of the novel racking mechanism.