Low-voltage switchgear and controlgear - Part 5-9: Control circuit devices and switching elements - Flow rate switches
低压开关柜和控制装置 - 第5-9部分:控制电路设备和开关元件 - 流量开关
发布日期:
2006-12-08
IEC 60947的本部分适用于检测气体、液体或颗粒固体流量的流量开关。如果超过流速的预设值,这些开关会改变其输出状态。
这些流量开关是独立的,具有半导体开关元件,并拟连接至额定电压不超过250 V 50 Hz/60 Hz交流或300 V直流的电路。
This part of IEC 60947 applies to flow rate switches that sense the rate of flow of a gas, a liquid or a granular solid. These switches change their output state if a pre-set value for the speed of flow is exceeded.
These flow rate switches are self-contained, have semiconductor switching element(s) and are intended to be connected to circuits, the rated voltage of which does not exceed 250 V 50 Hz/60 Hz a.c. or 300 V d.c.