From: Heiko Kuehling/Jpn/TUV <[email protected]> List-Post: [email protected] Date: 14 Mar 97 9:29:07 Subject: Main Switches used as Disconnecting Device within EN 61010-1
Question According to clause 6.12.3.1; main switches used as disconnecting devices= shall=20 comply with IEC 947-1 and IEC 947-3. In my expierence with other standards such as EN 60 950 (IEC 950), EN 60 = 335=20 (IEC 335) or EN 60 065 (IEC 65), none of those standards has this require= ment=20 for main switches.=20 Other checking the IEC 947, I have the feeling that this standard applies= for=20 disconnectors and circuit breaker for multiphase equipments.=20 I believe that double pole main switches, which are approved according to= EN=20 61058 (IEC 1058), with a contact gap > 3mm and a appropriate marking woul= d be=20 acceptable as a disconnecting device for single phase equipments within t= he=20 scope of EN 61010-1. Does anybody know, why it was defenitely refered to IEC 947?=20 In my eyes, it doesnt make a technical sence. Any comments? Heiko Kuehling T=9AV Rheinland Yokohama Laboratories e-mail: [email protected]
