Based on the analysis on the remote control of relay protection and automatic device,a scheme for realizing remote switching-on and switching-off of relay protection and automatic device strap circuit is proposed using high voltage equipment remote control principle.

Improvement of hydraulic circuit for the change of mill support roll;

Development of virtual hydraulic circuit system using Flash;

Simulation study on hydraulic circuit of light type hydraulic excavator based on AMESim

This paper points out the influence on the start-up circuit of the differential-voltage protection when the capacitor s primary connec- tion is changed.

A method for quick locating the defects in voltage circuit

The propagation of abnormal voltage signal produced by faulted CVT from one secondary voltage circuit to another in a sub- station is discussed.

In order to prevent persons and equipments from being harmed by secondary voltage circuit disconnection and inverse charge and increase the safe factor of high voltage circuit, this dissertation expounds the harm and countermeasures of the secondary voltage circuit disconnection according to the theory of secondary voltage circuit for double bus bar substation.

Re-design of Hydraulic Loop and Its Control System for Power Sliding Table of Machine Tool;

The characteristic of hydraulic loop is analyzed.

The paper introduces control system of automative yaw moment briefly,and stresses design on hydraulic loop of yaw moment control system.