Guide to Construction of ArTu switchgear - Abb

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Contents1 Standards relative to switchgear and applicability .............................................21.1 The IEC 60439-1 Standard......................................................................................................32 Nominal electrical characteristics of switchgear ...............................................43 Classification of electric switchgear3.1 Open switchgear and closed switchgear................................................................................73.2 External configuration..............................................................................................................73.3 Installation conditions..............................................................................................................73.4 Functional classification..........................................................................................................84 IP degree of protection in switchgear ........................................................................94.1 IP degree of protection in ArTu switchgear...........................................................................104.2 IP degree of protection and installation environment............................................................114.3 IP degree of protection and heating......................................................................................125 Degrees of IK protection of the housings5.1 IK degree of protection in ArTu switchgear...........................................................................136 Forms of segregation .....................................................................................................147 Checking the overtemperature limits inside ArTu switchgear7.1 Introduction...........................................................................................................................157.2 Thermal verification and certification of ABB SACE ArTu switchgear ..................................167.3 Checking procedure..............................................................................................................187.4 Extracts from test certificates................................................................................................238 Protection against effects of short-circuit8.1 Checking short-circuit withstand current..............................................................................448.2 Short-circuit current and suitability of the switchgear for the plant......................................458.3 Selection of the distribution system in relation to the short-circuit withstand current..........479 Protection against electric shocks9.1 Protection against direct contacts.........................................................................................519.2 Protection against indirect contacts......................................................................................5110 Practical indications for construction of the switchgear10.1 Positioning the circuit-breakers.............................................................................................5410.2 Anchoring the conductors near the circuit-breakers.............................................................5611 Guide to certification according to the Standard IEC 60439-111.1 Introduction...........................................................................................................................6111.2 Type tests and checks...........................................................................................................6211.3 Individual tests and checks (acceptance test of the switchgear)...………….………….........6412 Example of construction of ArTu switchgear12.1 Single-line diagram...……………...........................................................................................6812.2 Selection of the circuit-breakers and of the ducts outside the switchgear...........................6912.3 Front of switchgear, distribution system and structure……..……….....................................6912.4 Conformity with Standard IEC 60439-1……..…..…..............................................................72Annex A:LOVAG ACAE certificates ............................................................................................................74Annex B:Forms for the declaration of conformity and acceptance test......................................................92GENERALSTANDARDS ANDCHARACTERISTICSDECLARATION OFCONFORMITYVERIFYING THEOVERTEMPERATURESPROTECTION AGAINSTSHORT-CIRCUIT ANDELECTRIC SHOCKSPRACTICAL INDICATIONSCERTIFICATION ANDCONSTRUCTIONCERTIFICATESABB SACEGuide to Construction of ArTu switchgear1
1 Standards relative to switchgear and their applicabilityGENERALSTANDARDS ANDCHARACTERISTICSVERIFYING THEOVERTEMPERATURESPROTECTION AGAINSTSHORT-CIRCUIT ANDELECTRIC SHOCKSPRACTICAL INDICATIONSCERTIFICATION ANDCONSTRUCTIONElectric switchgear must be considered a component of the electrical installation in the sameway as a circuit-breaker or a plug socket. It is made up of several pieces of switchgear andcontrolgear assemblies grouped into one or more adjacent enclosures (columns).In switchgear you can find the enclosure - called housing by the standards (which carries outthe mechanical supporting and protection function of the components it contains) - and theelectrical equipment, consisting of the apparatus, the internal connections and the input andoutput terminals for connection to the plant.This complex must be suitably assembled to satisfy the safety requirements and optimally fulfilthe functions it is designed for.From this point of view, the Low Voltage Directive 2006/95/CE (which replaces the 73/23/CEand following amendments) and the relative implementation regulation oblige the installer tosign a declaration of workmanlike conformity, for each part of the plant realized.As known, the equipment and plants constructed in conformity with the IEC/EN standards areconsidered workmanlike. Therefore, like all the components of an electrical installation, theswitchgear must also conform to the relative product Standard. At present this Standard is IEC60439-1 (1999) + Am1 (2004) implemented at international level without any changes.These standards apply to Low Voltage switchgear (whose rated voltage is not higher than1000 V in alternating current with frequency no higher than 1000 Hz, or than 1500 V in directcurrent).The IEC 60439-1 is the general part for the switchgear while the other parts refer to specialpieces of switchgear and must be read together with the general part. These parts are:IEC 60439-2:IEC 60439-3:IEC 60439-4:IEC 60439-5:“Special prescriptions for busbar ducts”;“Special prescriptions for switchgear and controlgear assemblies intendedto be installed in places where unskilled persons have accessfor their use. Distribution boards (ASD)”;“Special prescriptions for assemblies for construction sites (ASC)”;“Cable distribution cabinets”;A further two CEI publications regarding electric switchgear are:IEC 60890 which is a method for determining the overtemperatures, by meansof extrapolation, for PTTA switchgear;IEC 61117 which is a method for determining the short-circuit withstand current,by means of calculation, of PTTA switchgear.After an overview of the Standard, this guide deals with ArTu switchgear conforming tothe IEC 60439-1 Standard.DECLARATION OFCONFORMITYCERTIFICATES2 ABB SACEGuide to Construction of ArTu switchgear
Page 1: Technical guideGuide toConstruction
Page 5 and 6: 2 Rated electrical characteristics
Page 7 and 8: 2 Rated electric characteristics of
Page 9 and 10: 3 Classification of electric switch
Page 11 and 12: 4 IP degree of protection in ArTu s
Page 13 and 14: 4 IP degree of protection and heati
Page 15 and 16: 6 Forms of segregationGENERALSTANDA
Page 17 and 18: 7 Checking the overtemperature limi
Page 31: 7 Checking the overtemperature limi
Page 46 and 47: 8 Protection against the effects of
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9 Protection against electric shock
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9 Protection against electric shock
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SACESACE10 Practical indications fo
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10 Practical indications for constr
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10 Practical indications for constr
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11 Guide to certification according
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12 Example of construction of ArTu
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Annex A: LOVAG ACAE certificatesIGA
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SACESACESACESACEAnnex A: LOVAG ACAE
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SACESACESACESACEAnnex A: LOVAG ACAE
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SACEAnnex A: LOVAG ACAE certificate
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Annex B: forms for the declaration
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Annex B: forms for the declaration
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Certificato N°OHS-015Certificato N
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Guide to Construction of ArTu switchgear - Abb

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