A new method for verification of DC resistance box;

The composition,principle,methods of measurement and design of the software for the semi-automatic verification system of DC resistance box are introduced, and the feasibility of the system is testified in this article.

The method to verify DC resistance box automatically using digital multipurpose meter is introduce as well as the software and program,and the error analysis is done.

The method of shortening the time for direct current resistance testing of transformer low-voltage side

This paper introduces a digital and intelligent active direct current resistor box,which calibrates various direct current resistance measurement devices substituting conventional standard resistor box.

The principle and process of dynamic testing the direct current resistance in transfor mer coil by "three points method" is introduced.

DC resistance measurement for low voltage side windingof large-scale transformer;

Diagnostic method for the over-standard unbalance rate of DC resistance of the winding at 110kV side in the 1 # Power transformer in Shatang Substation;

Development of the portable instrument for measuring DC resistance of main transformer windings;

The paper introduced the background and basis of compiling DL/T 979—2005"verification rule of DC high voltage megohm box",and its main content,which is new issue of electric power industrial standard.