Abstract:

The paper first introduces the insulation supervision of direct current system,then explains in detail the principle of balance and unbalance used to measure the insulation resistance,and finally presents the key technology for hardware and software design of the direct current grounded detect system.The practical application shows that this system can detect the insulation resistance of direct current systems with accuracy.With high practicability,the system provides a valid and necessary method for detecting direct current systems grounded.

Key words: MSP430;direct current system;insulation supervision