门联锁：起动与馈电回路的门机械联锁以避免在装置通电的情况下开门。

Door Interlocking: starter and feeder doors mechanically interlocked so doors cannot be opened with unit energized;

youdao

上海欧雅斯电气有限公司推出的一种双投型CB级一体式自动转换开关电器（ATSE），省略了CB级ATSE常有的机械联锁装置，转换动作速度大大提高。

An integrated dual-switching CB level automatic transfer switch equipment(ATSE), which is produced by Shanghai OYAS Electrics Co.

youdao

抽屉单元装有可靠的机械联锁装置，只有在分断开关的状态下才能被打开，同时抽屉具有明显的合闸、试验、分断位置显示。

There is mechanical interlock for the drawer units, they can be opened only if the switch is at break-off state. The drawers have apparent position indication for close~ test and off.

youdao