发射台配电系统低压断路器

低压断路器在电路中除起通断控制作用外,还具有保护功能,如过负荷、短路、欠压和漏电保护等,是低压电器中结构最复杂,在低压配电系统中地位最重要的产品。而DW15系列万能式断路器是一种改进型开关,由于CJX2-09交流接触器开距较大,灭弧较易,装配简单,调试及维护只需按下CJX2交流接触器上触头就可以进行。所以简化了结构,装配检修时接线工作简单,也提高了工作效率。

DW15万能式断路器升级改造

对有预储能式和无预储能式DW15万能式断路器控制原理进行分析,并将控制原理图转换为单独回路图的形式,便于进行PLC编程。采用西门子PLC对断路器的控制系统进行改造,一方面较好地解决了DW 15万能式断路二次控制回路中的中间继电器易发生故障而导致断路器不能进行储能和合闸操作且维修比较困难的问题,提高了断路器控制的可靠性和操作人员的安全性;另一方面由于PLC设备的接入为断路器的网络化和智能化提供了平台,可以通过扩充PLC设备和程序使得断路器实现新的功能、为断路器的信息化改造提供基础。

Major hazard sources analysis and prevention measures of packaging emulsion explosive production line

Emulsion explosive with favorable water-resistance performance,storage performance and detonation stability has been widely used in all over the world.The development actuality and production technique characteristics of emulsion explosive in China were introduced firstly.Taken the technique characteristics of packaging emulsion explosive into account,major hazard sources of emulsion explosive production line were analyzed.Finally,prevention measures based on inherent safety of emulsion explosive production were put forward.