Design and Application of Wiring-free Transformation of Secondary Equipment in Switchgear Based on Plug and Play Technology

The secondary equipment in the switchgear has complex transformation period, difficult construction and long time consuming. How to improve the efficiency is a problem in the engineering transformation. To solve this problem, this paper adopts the "plug and play" design concept to realize the modular assembly of new equipment through the equipment framework, and to set the green terminal flange of original equipment at the rear of the module and complete the cable wiring to new equipment to achieve the prefabricated wiring of the cable during the on-site transformation. A quick transformation scheme for the wiring-free equipment is proposed. The scheme may significantly shorten the transformation time and improve the operation and maintenance efficiency, and the application effect of the scheme is verified combined with the engineering application of the 110kV substation.