To develop an integrated

modular secondary control device to replace the traditional relay controller

this paper elaborates current status of the secondary control technology of GIS

analyzes its advantage and disadvantage

and brings forward a design scheme of modularized and integrated controller.It also introduces the function and principle of the integrated controller

and the model of the main component.Using this kind of integrated controller can save cable

shorten assembling time

simplify design

improve productivity

and strengthen reliability of the equipment.