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.

After applying embedded system based on ARM7 into mine-used flameproof feeding switch,real-time data collection and rapid connecting with industrial Ethernet of underground mine-used flameproof feeding switches were (realized.

Research on Intelligent Feeder Switchgear Based on CAN Bus;

This paper introduces a design scheme of the feeder switchgear protector based on CPLD, which can judge malfunction if the system has current leakage, open-phase and the load imbalance questions accurately by detecting phased.