Design of Embedded Ethernet Communication Based on Coal Mine Feeder Switch;

On the basis of analysis of the working principle and characteristics of RS232 and RS485, serial communication method was confirmed that the long distance data communication of mine-used feeder switch can be realized by adopting RS485 serial communication standard interface.

The paper expounds usage and technical characteristic of Chinese character technology in feeder switch products.

Analysis and Processing on BKD-630/1140 Type Flameproof Vacuum Feed Switch Failure

In this paper,the single chip microcomputer and special-purpose protocol chip SPC3 are utilized to develop the intellectual mine vacuum feed switch with PROFIBUS-DP interface,and the implementation of software and hardware for the protection device and communication interface are introduced.

Introduces a kind of intelligent protector of low voltage flameproof feed switchgears used in the coal mines.

According to the structure characterisitcs and environment where the switch locates,the expert system is adopted to analyze running state and failure of switch.

The movable transformer substation consisting of DW 80 type switch and the failure of the movable transformer substation low voltage switch using in the modern machinery coal mining face are in troduced.

For the sake of giving a reference to the power supply enterprises to select appropriate mode of operation and feeder switches in the implementation of distribution automation, two modes of DAS, i.