IEC 60947-5-9-2006 低压开关设备和控制设备.第5-9部分:控制电路设备和开关元件.流量率开关

标准号：IEC 60947-5-9-2006
中文标准名称：低压开关设备和控制设备.第5-9部分:控制电路设备和开关元件.流量率开关
英文标准名称：Low-voltage switchgear and controlgear - Part 5-9: Control circuit devices and switching elements - Flow rate switches
标准类型：K31
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：K31
国际标准分类号：29.130.20
适用范围：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) andare intended to be connected to circuits, the rated voltage of which does not exceed 250 V50 Hz/60 Hz a.c. or 300 V d.c.This standard does not specify the additional measures that are necessary for flow rateswitches used in conjunction with explosive sensing materials and/or in an explosive location.This standard is not intended to cover devices with analogue outputs.