{"id":750,"date":"2023-02-20T17:44:28","date_gmt":"2023-02-20T16:44:28","guid":{"rendered":"https:\/\/www.gt-engineering.it\/consulenza\/conformity-of-machinery-eletrical-panels\/"},"modified":"2023-03-03T09:39:24","modified_gmt":"2023-03-03T08:39:24","slug":"conformity-of-machinery-eletrical-panels","status":"publish","type":"consulenza","link":"https:\/\/www.gt-engineering.it\/en\/consulting\/conformity-of-machinery-eletrical-panels\/","title":{"rendered":"Conformity of Machinery Eletrical Panels"},"content":{"rendered":"\n\n \n \n \n
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The reference standard for the design and construction of on-board machine panels or at the service of Machinery is:<\/p>\n

\n

EN 60204-1<\/a>:<\/strong> Machinery Safety – Electrical equipment of machines. Part 1: General Requirements.<\/p>\n<\/blockquote>\n

 <\/p>\n

The standard analyzes the various functions required for the electrical equipment of a machine and provides sizing criteria:<\/p>\n

– Disconnection (Cap. 5).<\/strong> Among the main errors is the confusion between the need for an external disconnector and the request for a door lock.<\/p>\n

– Protection against Electrical Shock (Cap. 6). <\/strong>Here too there are often errors in the diagrams, also due to the fact that the standard assumes knowledge of the function of TN and TT earthing systems.<\/p>\n

– Equipotential Bonding (Cap 8):<\/strong> Here, unfortunately, the standard is written in a too complex way, such that the manufacturer is led to conclude that all the structural parts of the electrical equipment must be earthed.<\/p>\n

– Circuits and command and control functions (Cap. 9):<\/strong> grounding downstream of a control transformer is still under discussion.<\/p>\n

– Verifications (Cap 18):<\/strong> it is here that verification of the impedance of the fault loop and the suitability of the corresponding overcurrent protection device is explained and required.<\/p>\n

 <\/p>\n

However, this is not the only rule applicable to machine switchboards. Unfortunately, EN IEC 61439-1<\/a><\/strong> must also be respected, although for years it has been discussed within the technical committees that this standard contains "too severe" requirements for switchboards that are often built in a single copy.<\/p>\n

One of the critical aspects is the Design Verification called "Short-circuit withstand<\/strong>" §10.11. This can be avoided:<\/p>\n

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a) For SWITCHBOARDS which have short-time rated currents (see 5.3.4), or conditional rated short-circuit currents not exceeding 10 kA rms value (see 5.3.5).<\/p>\n

b) For SWITCHBOARDS or SWITCHBOARD circuits protected by current limiting devices having a limited peak current not exceeding 17 kA in correspondence with the maximum presumed short-circuit current allowed at the terminals of the ENCLOSURE input circuit.<\/p>\n

c) For the auxiliary circuits of the SWITCHBOARDS intended to be connected to transformers whose rated power does not exceed 10 kVA with a secondary rated voltage that is not less than 110 V, or does not exceed 1.6 kVA with a secondary rated voltage less than 110 V, and whose short-circuit impedance is not less than 4%.<\/p>\n<\/blockquote>\n

All other circuits must be verified.<\/strong><\/p>\n

 <\/p>\n

We hold training courses on the compliance of the Electrical Equipment with the Current Regulations, as well as carry out consultancy activities.<\/span><\/strong><\/p>\n

Read more about the subject, machinery electrical panels products standards EN 60204-1 and EN 61439-2<\/a>. <\/strong><\/p>\n

 <\/p>\n<\/div> <\/div>\n \n \n

<\/div>\n \n\n <\/div>\n <\/section>\n\n \n","protected":false},"excerpt":{"rendered":"

We hold training courses on the compliance of the Electrical Equipment with the Current Regulations, as well as carry out consultancy activities.<\/p>\n","protected":false},"author":1,"featured_media":590,"menu_order":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-750","consulenza","type-consulenza","status-publish","has-post-thumbnail","hentry"],"acf":{"sottotitolo":"The standards EN 60204-1 and EN IEC 61439-1"},"yoast_head":"\nConformity of Machinery Eletrical Panels<\/title>\n<meta name=\"description\" content=\"We hold training courses on the compliance of the Electrical Equipment with the Current Regulations, as well as carry out consultancy activities.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.gt-engineering.it\/en\/consulting\/conformity-of-machinery-eletrical-panels\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" 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