loop powered displays, hand held the safety. terminals etc. connected to the But if the surge protection hazardous location terminals of the devices certified with a resulting associated apparatus in Zone 0, 1 or Ex marking string of “Ex ia IICT 2 should all meet the requirements the user would have the ... Ga”, for The only additional wrong impression of installing ‘ia’. consideration if the design fully the devices in zone 0 which meets the requirements for then could cause danger. ’ia’ the use of non-linear elements is 2）CQM received the certification that Intrinsically safe systems application for surge protection utilizing surge suppression device with Marking Ex ia ... Ga, techniques shall be supported by an and for this matter, the applicant adequately documented analysis of provided a IECEx CoC issued by an ExCB as evidence. the effect of indirect multiple Such DS could help ExCBs to earthing, taking into account the adopt a consistent approach to criteria set out in clause 12 of the problem. 60079-25. The capacitance and inductance of the surge suppression devices shall be considered in the assessment of the intrinsically safe system. Kiwa Unit Ge Kiwa does not really see the need of Reject the draft Decision Sheet. The same as above. ExVision this decision sheet. But if ExCBs/ExTLs agree that the NL Even if the device is marked Ex ia DS is needed, because there are IIC Tx Ga, but the installation designers/installers that look at standard prohibits the installation in labels, not in standards, then see
loop powered displays, hand held terminals etc. connected to the hazardous location terminals of the associated apparatus in Zone 0, 1 or 2 should all meet the requirements for ‘ia’. The only additional consideration if the design fully meets the requirements for ’ia’ then the use of non-linear elements is that Intrinsically safe systems utilizing surge suppression techniques shall be supported by an adequately documented analysis of the effect of indirect multiple earthing, taking into account the criteria set out in clause 12 of 60079-25. The capacitance and inductance of the surge suppression devices shall be considered in the assessment of the intrinsically safe system. the safety. But if the surge protection devices certified with a resulting Ex marking string of “Ex ia IICT ... Ga”, the user would have the wrong impression of installing the devices in zone 0 which could cause danger. 2）CQM received the certification application for surge protection device with Marking Ex ia ... Ga, and for this matter, the applicant provided a IECEx CoC issued by an ExCB as evidence. Such DS could help ExCBs to adopt a consistent approach to the problem. Kiwa Unit ExVision NL Ge Kiwa does not really see the need of this decision sheet. Even if the device is marked Ex ia IIC Tx Ga, but the installation standard prohibits the installation in Reject the draft Decision Sheet. But if ExCBs/ExTLs agree that the DS is needed, because there are designers/installers that look at labels, not in standards, then see The same as above.
ExTAG_427A_CC_Compilation.docx