Consideration of Interlock System Applicable to Pneumatic Driving Systems as the Safety System (BS/EN764-7)

摘要

The safety system is defined in BS/EN764-7(2002) (Safety systems for unfired pressure equipment) European Standard which is equipped with pressure releasing means (e.g, safety valve, reliefe valve, rapture disk). However, this safety system is not adequately functional as a safety system because the pressure releasing means cannot ensure the security for safe-side failures or degradation characteristics. In view of this, this paper presentation an interlock system applicable to pneumatic driving systems based on the safety (confirmation) principle. This system in the Safety-related parts (system) without giving (harm) the effects of hazardous side of error to stop the run of the load by the power source shut off from the possibility of hazardous side of error, it is practical there is no contradiction in ISO12100, IS013849 international standard. The interlock system discussion about the suitability of the safety system defined in BS/EN764-7. As a result, the consideration for ensuring the reliability in "Safety of the control" by BS/EN764-7 is requested by adopting the safety system of the interlock system.