IEC 60947-5-8-2006 低压开关设备和控制设备.第5-8部分:控制电路器件和切换元件.三位启动开关

标准号：IEC 60947-5-8-2006
中文标准名称：低压开关设备和控制设备.第5-8部分:控制电路器件和切换元件.三位启动开关
英文标准名称：Low-voltage switchgear and controlgear - Part 5-8: Control circuit devices and switching elements - Three-position enabling 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 specifies requirements for three-position enabling switches.These switches are used as components of enabling devices described in 10.9 ofIEC 60204-1 to provide signals that,a) when activated, allow machine operation to be initiated by a separate start control, andb) when de-activated,i) initiate a stop function, andii) prevent initiation of machine operation.NOTE 1 The enabling control function is described in 9.2.6.3 of IEC 60204-1.NOTE 2 This standard does not deal with enabling devices.This standard does not apply to:− three-position enabling switches for non-electrical control circuits, for example hydraulic,pneumatic;− enabling switches without three-position mechanism;− emergency stop devices (see IEC 60947-5-5).