In the power user installed grid-load terminal,many important loads at low voltage are cut in large power users during emergency load shedding action.In order to reduce the adverse affect to power users,a detailed inquiry of user low voltage load is executed in fields on load character,volume and switch devices.According to the needs of precise acquisition and emergency control of user 400 V load,also for economic reasons,three schemes are proposed for user 400 V load swift shedding.A novel terminal subunit based on GOOSE communication is developed at decentralized and concentrated user loads.Through improvement,the 400 V load cutting delay is reduced and the performance can satisfy the requirements of emergency load shedding.