主变压器BMH型排油注氮灭火系统改造方案及工程应用

目前，油浸变压器BMH-1A型排油注氮灭火系统的控制回路均存在启动条件单一、接线不合理等问题，容易引起装置误动。通过对该型排油注氮灭火系统的分析，提出在控制回路中增加主变压器三侧断路器位置、增加紧急解锁按钮以及改造探测器接线等措施，保证灭火系统在主变正常运行时不误动，主变着火时不拒动。另外，对BMH-1A型排油注氮灭火系统机械结构进行了改造，并针对变电站实际情况提出工程应用的改造方案。

Renovation Program and Application of the BMH-1A Oil-drain and Nitrogen-filling Fire-prevention System

The oil-drain and nitrogen-filling fire-prevention system of BMH-1A transformer has some problems in control circuit such as the simple start-up condition and unreasonable connection,which makes the device prone to start-up by mistake.On the basis of an analysis of the control circuit of the oil-drain and nitrogen-filling fire system,some measures,such as adding circuit breaker position and emergency unlocking button in the control circuit,are proposed in the renovation plan to ensure the fire-fighting syst...