Over deze norm
NEN-EN 50676 specifies general requirements for the construction, testing and performance of electrically operated refrigerant fixed gas detection equipment in safety applications. This document will not specify requirements for portable locating leak detectors for refrigerant application. This document is applicable to equipment whose primary purpose is to provide an indication, alarm and/or other output function to warn of the presence of refrigerant gases in an industrial or commercial environment and, in some cases, to initiate automatic or manual protective actions. It is applicable to equipment in which the sensor automatically generates an electrical signal when gas is present. In accordance with the classification of the gas and the tasks covered in EN 60079-29-1, EN 45544-2 and EN 45544-3 for refrigeration application, three different types of equipment are provided (see also Table A.1). - Type I: Refrigerant gas detection equipment for A2, A2L, R717, A3, B3 refrigerants as per safety class in EN 378-1:2016 Annex E in accordance with explosion protection. The equipment shall follow the existing performances in EN 60079-29-1 for ranges up to 20 % LEL and or 0 % - 100 % LEL.” - Type II: Refrigerant gas detection equipment for A1, A2L, B1, B2L refrigerants as per safety class in Annex E of EN 378-1:2016 in relation to OEL values. Performance of the equipment shall be in accordance with requirements in EN 45544-1 in combination with EN 45544-2. - Type III: Refrigerant gas detection equipment for A1, A2L, B1, B2L refrigerants as per safety class in Annex E of EN 378-1:2016 not covered by Type I or Type II. Performance of the equipment shall be in accordance with requirements in EN 45544-1 in combination with EN 45544-3.
|Nederlandse titel||Elektrische apparatuur toegepast voor detectie en concentratiemeting van koelmiddelen in gasvorm - prestatie-eisen en testmethoden|
|Engelse titel||Electrical equipment used for detection and concentration measurement of refrigerant gases - Performance requirements and test methods|