Gemmo Quadri

Gemmo QuadriB.U. Gemmo Switchboards3

ContentGemmo Business Units 6Gemmo Organization 8B.U. Gemmo Switchboards 9Gemmo Switchboard Equipments 10Testing Department Equipments 12HSE 13References 15Product Lines 16Features of supply 18Certificates of Type Tests 20Medium voltage metal clad Switchboards 22Series GM-B EurocladMedium voltage Switchboard 26Series GM-BM Air Insulated 24kV EurocladMedium voltage metal enclosed Switchboards 28Series GM-P EuroclosedMedium voltage metal clad switchboard 32Series FM-B/FSA 3k Vcc EurocladLow voltage distribution switchboards 34Series GM-PC EuropowerLow voltage metal clad switchboard 38Series GM-B/TFM—750 Vcc EurocladLow voltage Motor Control switchboards 42Series GM-MCC Eurocenter5

GemmoGemmo S.p.A. has operated since 1919, and over the years hasgained significant experience in key areas of system technologyand services:BUSINESS UNIT SERVICESThis Business Unit works to provide each customer with the type of service tailoredto his needs: simple maintenance plant, integrated management, facility managementand global outsourcing. Gemmo S.p.A. works in high critical projects, for importantPublic Administration and private companies. It provides management services,mechanical, electrical plant maintenance, special and heat management,integrated management, outsourcing, performance contracting, post-installationassistance, refurbishment, training of personnel.BUSINESS UNIT PLANTS & SYSTEMS(Infrastructures)Designing and construction of technological system for infrastructures: Civil and tertiaryindustry, transport (ports and airports, roads, highways and tunnels), powersystems, substations (design and implementation “turnkey” primary substation) andsystems (production and revamping ofpower plants).B.U. SYSTEMThis B. U. is dedicated to the design and implementation of integrated high-techsystems. The sophisticated inputs, with high expertise in hardware and softwareplanning, offer a range of unique systems for flexibility and compatibility: theCCTV security systems, smoke detection and burglar alarm systems, full automationof monitoring, remote control, communication, telephony and data networks.The Systems division has produced the most significant experiences in theintegrated management of buildings and in the Control and Supervision of Roadand Tunnel Safety systems.6

Gemmo SpA has its head office in Arcugnano (Vicenza), 2 viale dell’Industria .At the same address it’s located the BU Switchboards and the Electrical panelsworkshop, with an area covering 3800mq.BUSINESS UNIT RAILWAYSThis area, which operates from Rome office, is responsible for rail infrastructure and transport systems. It can offer awide range of elaborated ad multi-disciplinary turnkey projects, whose integrated implementation is guaranteed by theuse of latest technology and according to criteria of cost, durability, low environmental impact and complying withsafety standards. Clients can benefit from the expertise of the technical department that covers all segments of engineeringtechnology systems applied to rail and metro transport systems, with particular emphasis on public transportation.The turnkey projects successfully completed by the Business unit give evidence of the know-how andthe high technical skills achieved by the members of our staff. Our offer includes: feasibility study, detailed designand construction, planning and cost control, project management, testing and commissioning, training and maintenance,project financing.CITY LIGHTING UNITThe unit City Lighting offers complete light service toPublic Administration: from electricity supply tomanagement and maintenance of systems. Increasecontrol and quality, simplify procedures:saving energy is the ahead challenge.B.U. SWITCHBOARDSThe B.U. Switchboard plans, manufactures and providesassistance to supervisors and protected armoured MV andLV switchgear Motor Control and Power Centre type.The production range comprehends also special running,internal arc-proof, MV/LV Shelter for outdoor use and integratedmanagement and control.7

Gemmo OrganizationGemmo SpAGemmo SpAIncomeGemmo Turnover 2008Gemmo Turnover €/1000€ 250.00026%14%18%42%InfrastructuresRailwaysServices (FM)City Lighting€ 200.000€ 150.000€ 100.000€ 50.000€ 0200120022003200420052006200720082009*2010*City LightingServices (FM)RailwaysInfrastructures8

B. A. Gemmo SwitchboardsStaff involved in the B.A. SwitchboardsStaff NumberProduction office 1Secretary 1Estimation Office 2Electrical design Engineering Department 8Mechanical design Engineering Department 3Store/Expediting Office 3Electrical Assembly/Wiring Department 25Mechanical Assembly department 4Testing 3In addition, the Switchboard BusinessUnit relies on the support of the followingdepartments of the GroupGemmo SpA for the management oforders:Purchasing DepartmentCommercial DepartmentHuman Resources DepartmentAdministration DepartmentGemmo SwitchboardsContracts signed per yearEURO120000001000000080000006000000400000020000000YEAR200020012002200320042005200620072008200920109

Gemmo SwitchboardsEquipmentsCarpentry Department(main machines)• Nr. 1 Hydraulic shears for cutting metal sheet with CNC• Nr. 2 CNC Punching with Cad-Cam programming• Nr. 3 Manual Punching• Nr. 2 Hydraulic press brakes with numerical control (CNC)• Nr. 1 Hydraulic Notching• Nr. 3 Chop Saws• Nr. 1 Band Saw• Nr. 3 Stand Drill• Nr. 3 Wire Welding Mig Mag equipment• Nr. 2 Tig Welding equipment10

Wiring Department(main machines)• Equipment for copper processing:Nr. 1 Chop SawNr. 1 Band SawNr. 1 Hydraulic ShearNr. 1 Punching machine for copperNr. 2 Belt sanders fixedNr. 2 Belt sanders portableNr. 1 Hydraulic Press Brake with CNCNr. 1 Combined copper hydraulic punch and bend portable• Nr. 25 Set of forklift individual equipment for the execution ofwires• Nr. 2 Stand Drill• Nr. 4 Kit for crimping copper Power compression lugTechnical OfficeSoftware used for the design:• Auto-cad (Design)• GBG Draft Maker (Design)• Alma Cad Cam (Programming of CNC punchingmachine)• DOC 020D (Calculation)• Electro graphics CADELET• Electro graphics ARCHardware used for the design:• 10 Windows Workstation11

Testing Department EquipmentsN° Ref. No. Name01 D3-001 PRECISION VOLTMETER AS-001 HAEFELY02 D3-002 VOLTAGE DIVIDER AS-001 HAEFELYBrand03 D3-003 DIGITAL MULTIMETER - ITT - METRIX04 D3-004 ELECTRICAL TRANSFORMER - S.I.P.I.E.05 D3-005 STIFFNESS TEST SET -ELEKTROTECHNVOLTA06 D3-006 MEGAOHMETER - PANTEC07 D3-007 MICROOHMETRO -Part NumberVOLTA-PROGRAMMA08 D3-008 DIGITAL CENT. GAUGE CALIPER - MITUTOYO09 D3-009TWENTIETHS GAUGE VERNIER CALI-PER- MITUTOYO10 D3-010 TWENTIETHS GAUGE CALIPER - MITUTOYO11 D3-011 TORQUE WRENCH - BETADMI 551Vn=150V Cl.=0,5 +/-3 DIGIT.ModelKK 100-1Vnp=100kVeff. Fn=50Hz Vns=100V Cn=1010pFMX51Vccn=1000V Cl=0,5 Vacn=750V Rn=40Mohm Iccn=10A Ican=10aA1Direct capacity=10-25-50/5A Effi.=5VA Cl.=0,5UH 28MVn=5000V 50Hz Imax=700mA Idissins.=1-100mAMIS 930 - Voltage Test=selectable 250Vcc; 500Vcc; 1000Vcccapacity=0-200Mohm with automatic selectionMOM 600Ameasuring range=0-1999 micro-ohm exit Corr.=0-600Ac.c.DIGIMATIC CD-15BVernier calibre measure 0-150mm530-104Vernier calibre measure 0-150mm530-104Vernier calibre measure 0-150mm608/20Range 40-200Nm12 D3-012 GONIOMETER - MITUTOYO Leg 300mm13 D3-013 SQUARE 90° INOX - MITUTOYO Dim. 145x275mm14 D3-014 TORSION-METER WEIGHING SCALE - BLM15 D3-015 TORQUE WRENCH - FACOM16 D3-016 CASS. AMPER. RELAY TRIF. TEST - ISA17 D3-017 CASS. VOLTM. RELAY TRIF. TEST - ISA3020/200Range 20-200NmFACOM S 315 DARange 40-200Nm3/TRE-F - ISAmeasuring range=0,1A-1A-5A-10A-50A3/TRE-F - ISAmeasuring range=0-250V Phase-meter=0-270°18 D3-018 BLADE FEELER GAUGE AS-002 FISCHER 12 micron +/- 0,519 D3-019 PLATE FEELER GAUGE AS-002 FISCHER 100 micron +/- 120 D3-020DIGIT. ELECTR. FEELER GAUGE PORT-ABLEAS-002FISCHER21 D3-021 PAINT ADHESION TESTER - NAMICOM22 D3-022 TORQUE WRENCH - BETA23 D3-023 TORQUE WRENCH - FACOM24 D3-024 TORQUE WRENCH - BETA25 D3-025 TORQUE WRENCH - USAG26 D3-026 ENGINE TEST STAND BOARD - GEMMO/BP127 D3-027 ENGINE TEST STAND BOARD - GEMMO/BP228 D3-028ELEVATOR INSTRUMENT TRANS-FORMER- SEA29 D3-029 IMPULSE TESTING SYSTEM - PASSONI VILLADelta scope MP3CMeasure 0-2000 micronGS 202Tool with 6 cutter with a distance of 2mm + 2 guide tips608/5Range 8-60NmFACOM S 315 DARange 40-200Nm608/5Range 8-60Nm810/200Range 20-200Nm0-400V 50Hz - 0-100mA0-220Vcc 0-100KOhm0-400V 50Hz0-220Vcc380V-100KVPn=10KVA0-200KVPn=5KJ30 D3-030 AC VOLTAGE TEST SYSTEMS - HAGENUT T22/1 - 0-75KV12

Health, Safety and EnvironmentGemmo SpA is UNI EN ISO9001:2008 standards certified for Quality system andUNI EN ISO 14001:2004 certified for environment safeguard and has obtainedthe certification of qualification for public works.In addition, Gemmo SpA certifies all types of Switchboards produced by qualifiedlaboratories.13

Main ReferencesDetailed description of supplySupplierdate ofcontractperiod of supplyamount of supplySupply nr. 16 QMT, n. 15 QGBT and QBT sec.Plant: New USA "Dal Molin" Base of VicenzaSupply of QMT, QGBT and QBT sec.Plant: Hospital THIENE-SCHIO (VI)Supply nr. 12 QMT primary biplanes with the relevantexecutive draft (n.140 section)Supply nr. 16 QBT MCC with removable drawersPlant: Turin UndergroundSupply nr. 32 QMTPlant: Collection network of Val d'Agri - Viggiano (PZ)Supply nr. 67 QBTPlant: Collection network of Val d'Agri - Viggiano (PZ)Supply nr. 5 QMTExpansive planting project Generation/Transformationof Eritrea National electricity network with the presenceof CHP plantSupply nr. 9 QBTPlant: New passenger Terminal and Technology StationSupply QMT e QBTPlant: Castiglione delle Stiviere (MN) and Pedrignano(PR)Supply Switchboards secondary BTPlant: New Mestre HospitalCMC- CCC COMPLEX DAL MOLIN 25/03/2009 2009-2011 € 3.600.000,00SUMMANO SPA - ULSS 4 THIENE SCHIO 10/02/2009 2009-2010 € 2.200.000,00ENEL DISTRIBUZIONE SpA (Roma) 16/03/1998 1998 - 2004 € 2.171.185,00GRUPPO TORINESE TRASPORTI 26/01/2004 2004 - 2006 € 2.070.000,00ENI SpA - Agip Division 20/12/1999 2000-2001 € 1.967.204,47ENI SpA - Agip Division 20/12/1999 2000-2001 € 931.200,00MINISTRY OF ENERGY, MINES AND WA-TER RESOURCEERITREA ELECTRIC AUTHORITY15/02/1997 2000 € 1.654.234,00GEMMO & G.T.M.H. scarl 01/05/1996 1997 € 1.885.000,00BARILLA ALIMENTARE SpA 22/07/1998 1998 € 1.404.762,76MESTRE HOSPITAL 01/02/2006 2006 € 1.575.000,00Supply nr. 35 QMT CARLO GAVAZZI IMPIANTI SpA 15/12/2000 2001 € 1.187.850,87Supply nr. 3 QMT, Nr. 3 QGBT and nr. 13 QBTPlant: NIGUARDA (MI) HospitalSupply nr. 3 QMT and nr. 2 QBT PCPlant: Modification of refinery electrical power networkNICO SRLCOGENERAZIONE NIGUARDA01/10/2008 2008-2009 € 1.063.986,00G.S.P.L.A.J. 10/1999 1999-2000 € 1.057.000,00Supply nr. 4 QBT C.C. metal cladPlant: Municipality of Turin cityAEM TORINO DISTRIBUZIONE SpAGRUPPO IRIDE ENERGIA08/02/2007 2007 € 1.028.875,00Supply nr. 950 QBT InoxPlant: Tunnel Management LombardiaSupply QBT primary and QBT secondaryPlant: Galleria Valsassina di LeccoSupply of QBTPlant: Tunnel Management LombardiaSupply QBTPlant: Mont Blanc TunnelSupply QMT and QBTPlant: Aviano Air BaseANAS Lombardia 25/01/2010 2010-2012 € 1.020.000,00VALSASSINA S.c.a.r.l. 08/01/2005 2005 € 999.310,00ANAS Lombardia 18/12/2009 2010-2012 € 950.000,00S.I.T.M.B. MONT BLANC TUNNEL -COURMAYEUR05/2001 2001 € 946.000,00US NAVY R.O.I.C.C. ITALY 12/1999 2000 € 1.217.170,0014

ReferencesOur main clients- ACEA spa- AUSTIN ITALIA spa- ENEL DISTRIBUZIONE spa- BARILLA ALIMENTARE spa- SIMAC spa- SINCROTRONE TRIESTE SCpa- AERIMPIANTI spa- CARLO GAVAZZI IMPIANTI spa- ZUCCHINI spa- FANTONI spa- ENI spa (Divisione AGIP)- US NAVY ROICC ITALY- SEA SOCIETA' AEROPORTUALE spa- ZIGNAGO VETRO spa- SIEMENS spa- ITALFERR- ALITALIA- DANIELI AUTOMATION spa- TRUCK & BUSES Co- PIRELLI & C. Milano- ANAS- BTICINO spa- API RAFFINERIA di ANCONA spa- GRUPPO TORINESE TRASPORTI- AEM TORINO DISTRIBUZIONE spa(GRUPPO IRIDE ENERGIA)- AZZAWIYA OIL REFINERING Co- EDISON spa- NICO srl- RFI spa15

Products LinesSeries GM-B EUROCLADSeries GM-BM EUROCLADMedium voltage metalclad switchboards(service category:LSC2B) standardizedmodular cubicles; can be equipped with sulphurhexafluoride and vacuum packed circuit breakers .Employment: in power plants, substation, transformerrooms and industrial plants. Particularlysuitable in heavy load continuous cycle installationswhere personnel safety and risks of fire are high; canbe used also for operating and protecting high poweredmachinery and primary distribution lines.Medium voltage metal clad(easy) switchboards(service category:LSC2B oLSC2A) modular cubiclesinternal arc standardized;can be equipped with sulphur hexafluoride andvacuum packed switches.Employment: in substations, transformer rooms,in industrial and civil installations; it can be usedalso for operating and protecting electrical machineryand distribution lines.Series GM-P EUROCLOSEDSeries FM-B/FSA EUROCLADMedium voltage metal enclosedswitchboards (servicecategory LSC2A) in standardizedunits, which can beequipped with sulphurhexafluoride or vacuum packed switches types, connection-disconnectionsand break load.Employment: in substations, transformer rooms,in industrial and civil installations; it can be usedalso for operating and protecting electrical machineryand distribution lines..Medium voltage metal cladswitchboards (service categoryLSC2B) in direct currentwith internal arc standardizedmodular cubicles; theycan be equipped with internal single-pole circuitbreaker which can be fitted with Bi-directional DC,in air, magnetic blow and free release.Employment: in transformer rooms, electricalsubstations for operating and protecting railwaytraction system lines.16

Series GM-PC EUROPOWERSeries GM-B/TFM EUROCLADLow voltage distribution switchboards with modularcubicles; can be equipped with circuit type: open, box,and any other miniaturized LV modular switchgear andcontrol.Employment: In power plants, substations, transformerrooms, industrial and civil installations; andalso for operating and protecting LV utilities and differentLV distribution needs.Low voltage metal claddistribution in modularcubicles internal arc standardized;internal singlepolecircuits can be fitted with bi-directionalswitches in air, magnetic blow and free release.Employment: in transformer/conversion rooms,operating and protecting traction system lines inareas of tram, trolley bus and underground lines.Series GM-MCC EUROCENTERLow voltage motor controlpanel in standardizedmodular cubicles andmodular drawers equippedwith circuit breakers, switches, fuses, meters andauxiliary devices.Employment: In power plants, industrial and civilinstallations. Generally, anywhere it is required controland motor protection of low voltage motors and invarious start-up systems.Gemmo Switchboards Testing Plate17

Features of supplyCommon to all Gemmo Switchboards ClassesACCEPTANCE TESTPAINTINGEach part is tested in our workshop according to the acceptance test asper IEC standards which consist of:• Test voltage at industrial frequency;• Voltage test on auxiliary circuits;• Mechanical operation test;• Auxiliaries devices test;• Control cabling with regards to the operation of switchgear, reports,protections and auxiliaries devices.• Any type of tests on request.Standard (grey) RAL 7035 with epoxy powder after pickling and phosphatetreatment of metal, hardening of the powder in a furnace at the workingtemperature of 180° C.The minimum thickness of the finishing touch is 50 micron. The surfaceappears semi-gloss textured finished.Painted surfaces are in conformity with the adhesion test as per DIN53151.Different colours on request.The internal accessories, the switches supporting panels and the partssubject to friction are galvanized and passivated.NORMAL SERVICE CONDITIONSINSTALLATION AND CONNECTINGSwitchboards are usually provided with the following service conditions:- minimum room-temperature: -5 °C- maximum room-temperature: +40°C- maximum relative humidity: 50%- altitude A.M.S.L. 1000 mtAnd it’s usually guaranteed the IP3X protection on the external surfacewith closed doors (IEC 60529). For the functioning others than the normal,specify the request at the moment of the order.The cubicles are assembled and tested at the factory, so they shouldonly be fixed on the installation floor perfectly level, with expansionbolts (beside the holes in the base plate), mechanically matched andconnected to external circuits.The horizontality of the shelf guarantees the proper functioning ofequipments (in particular the mechanical devices) and easy assemblyof the different cubicles .The fixing of the switchboard can also be performed with irons, onrequest.MAIN ACCESSORIES ON REQUESTACCESSORIES FOR NORMAL SUPPLYIn addition to power and auxiliary equipments (to be defined at the order),the switchboard can be provided with various accessories:Each switchboard is normally provided with:• Interior lighting• Lifting eyebolts• Controlled Electrical Heater• Side panel to cover the ends• Humidistat• Screws for coupling cubicles• Base Irons• Levers for control and handling equipments (when necessary—• End plates of power cables transitquantity on request)• Backing plates• Installation drawings and diagrams (A4 form)• Key locks on doors• Door locks• Circuit breaker carrying truck off the switchboard• Locking keys of each type used (copy)• Earthing trucks• Partition for closing the auxiliary cable transit - sockets for motive power• Supporting shelf of various levers and handles• Extension for switch test and/or contactor outside the switchboard (GM-B GM-BM, GM-P)18

AUXILIARIESAuxiliary equipments are usually placed on the front panel, in cubicles separated by metal from the switchgear and disconnectionequipments of main circuits.It is always possible to access to the auxiliary equipments with the power panel (IP2X).Measuring tools, protection relays and the various auxiliary tools (such as manipulator control, positioning signal, relays,buttons...) are usually found running on the recessed opening door of the instrument compartment.For particular needs it is possible to install the auxiliary equipments on appropriate space obtained in the side part ofthe compartment. Inside the tool cubicles it is possible to fit: auxiliary relays, rotary switches, circuit breakers of variousauxiliary circuits, fuses, terminal blocks and other components). The terminal blocks are usually placed in the front of thecubicle. The auxiliary cables are made with flexible cables, flame retardant and low toxic and corrosive gases smoke.The minimum sections usually used are 1,5 sq mm for the auxiliary circuits and 2,5 sq mm for the power circuits. All connectionsare usually made with compression lugs and each conductor is numbered with appropriate markings.The conductors are placed in appropriate raceway and plastic conduits (metallic in transit zones M.T.) fire retardantand low toxic gas smoke.MAIN DATA FOR SWITCHBOARDS DEFINITIONBefore delivery it is important to provide the following information:• Type of switchboards and execution;• Type of service: continuous or irregular, normal or emergency;• Place of installation, relative climate and environment of installation (interior,external, special environments);• Provision of desired disposition of switchboards with details of in and out (in bars or wire from the top or thebottom of the section and the type to specify) for main and auxiliary circuits;• Single-line layout of the system. Specify nominal and operating voltage, bus bar rated current, short circuitoperating voltage, electrical and service data of all utilities (generators, transformers, motors, lines, batteriescondenser, etc.) frequency, neutral point (insulated or on the ground) and power voltage of auxiliary circuits;• Features of power and auxiliaries equipments;• Painting colour (only if other than RAL 7035 standard);• Miscellaneous: list of nameplates of the accessories;• Other particular features which are different than those described in the present catalogue.19

DATECERTIFICATION CENTERCERTIFICATENr.SWITCHBOARD TYPE EXECUTES TESTS TEST VALUES05/08/1988CESICentro Elettrotecnico Sperimentale ItalianoMP-10108EUROPOWER GM-PC/TVoltage TestHeating-up TestShort circuit TestMechanical TestSecurity Level Test400Vca2000A50KA/1s05/09/1991 ABB SACE SPP6189 EUROCLOSED GM-P Short circuit Test20/09/1991 ABB SACE 29.160 EUROCLOSED GM-P Voltage Test24KVca630A16KA/1s24KVca630A16KA/1s04/06/1992CESICentro Elettrotecnico Sperimentale ItalianoMP 92/006280 EUROPOWER GM-PC/T Short circuit Test400Vca2500A85KA/1s06/07/1992CESICentro Elettrotecnico Sperimentale ItalianoMP-92/028067EUROCLAD GM-BHeating-up TestShort circuit Test12KVca1250A31,5KA/1s29/12/1992 ABB SACE 2519 EUROCLAD GM-B Short circuit Test17,5KVca630A13,5KA/1s09/06/1993CESICentro Elettrotecnico Sperimentale ItalianoMP 93/035325 EUROCLOSED GM-P Short circuit Test24KVca800A16KA/1s31/08/1993CESICentro Elettrotecnico Sperimentale ItalianoAT 93/22520 EUROCLOSED GM-P Voltage Test24KVca800A16KA/1s02/09/1993CESICentro Elettrotecnico Sperimentale ItalianoMP 93/035328EUROCLOSED GM-PVoltage TestHeating-up Test24KVca800A16KA/1s02/09/1993CESICentro Elettrotecnico Sperimentale ItalianoMP-93/022881 EUROCLOSED GM-P Heating-up Test24KVca800A16KA/1s15/11/1995ISTITUTO ELETTROTECNICO NAZIONALEGALILEO FERRARIS29890-01 EUROCLOSED GM-PVoltage TestHeating-up TestShort circuit Test24KVca630A16KA/1s09/10/1996CESICentro Elettrotecnico Sperimentale ItalianoMP-97/000265ARC EUROPOWERGM-PC/TAInt. Arc Test415Vca6000A100KA/1s c.to-c.to75KA/0,2s int. arc16/12/1997ISTITUTO ELETTROTECNICO NAZIONALEGALILEO FERRARIS31459-01.EEUROCLAD GM-BVoltage TestHeating-up TestShort circuit Test24KVca1250A25KA/1s08/11/1999ISTITUTO ELETTROTECNICO NAZIONALEGALILEO FERRARIS32896-01.EEUROCLAD GM-BVoltage TestHeating-up Test24KVca2500A25ka/1S12/12/2001CESICentro Elettrotecnico Sperimentale ItalianoMP-A2/007625GM-CPFSVoltage TestShort circuit Test3,6KVcc3000A36KA/0,5s20

Certificates of Type TestsGemmo certifies all types of switchboards produced by qualified laboratories..DATE12/12/200112/01/2005CERTIFICATION CENTERCESICentro Elettrotecnico Sperimentale ItalianoCESICentro Elettrotecnico Sperimentale ItalianoCERTIFICATENr.MP-A2/007626SWITCHBOARD TYPE EXECUTES TESTS TEST VALUESGM-CPFSVoltage TestShort circuit TestA5/001370 EUROCLOSED GM-P Voltage Test3,6KVcc3000A15KA/0,5s24KVca630A16KA/1s12/01/2005CESICentro Elettrotecnico Sperimentale ItalianoA5/001456 EUROCLOSED GM-P Heating-up Test24KVca630A16KA/1s13/01/2005CESICentro Elettrotecnico Sperimentale ItalianoA5/001558 EUROCLOSED GM-P Heating-up Test24KVca400A16KA/1s14/01/2005CESICentro Elettrotecnico Sperimentale ItalianoA5/001389 EUROCLOSED GM-P Short circuit Test24KVca630A16KA/1s30/05/2006CESICentro Elettrotecnico Sperimentale ItalianoA6020420 GM-B/FSA Voltage Test3,6KVcc3000A50KA/0,25s06/06/2006CESICentro Elettrotecnico Sperimentale ItalianoA6/015390 GM-B/FSA Heating-up Test3,6KVcc3000A(6000A/2h-6450A/5m)50KA/0,25s08/06/2006CESICentro Elettrotecnico Sperimentale ItalianoA6/016877 GM-B/FSA Short circuit Test3,6KVcc3000A50KA/0,25s09/06/2006CESICentro Elettrotecnico Sperimentale ItalianoA6/016878 GM-B/FSA Internal arc Test3,6KVcc3000A50KA/0,25s12/04/2007CESICentro Elettrotecnico Sperimentale ItalianoA7010262 GM-B/TFM Voltage Test750Vcc3150A-5000A70KA/0,25s18/04/2007CESICentro Elettrotecnico Sperimentale ItalianoA7010792 GM-B/TFM Heating-up Test750Vcc3150A-5000A70KA/0,25s19/04/200720/04/2007CESICentro Elettrotecnico Sperimentale ItalianoCESICentro Elettrotecnico Sperimentale ItalianoA7010927 GM-B/TFM Short circuit TestA7011141 GM-B/TFM Internal arc Test25/06/2008 ISTITUTO GIORDANO 242381 FIRE FIGHTING BOX06/03/2009INRIMISTITUTO NAZIONALE DIRICERCA METROLOGICACycling loading TestOver-pressure/lowpressure09-0184-01 EUROPOWER GM-PC/T Heating-up Test03/12/2010 LABORATORY SVEPPI-SIEMENS RP LS 10/155 EUROCLAD GM-BMVoltage TestHeating-up TestShort circuit TestInternal arc Test750Vcc3150A-5000A70KA/0,25s750Vcc3150A-5000A70KA/0,25s5.000Pax 500.000 cicli400Vca6000A75KA/1s24KVca1250A16KA/1s21

Medium voltage metal clad SwitchboardSeries Euroclad GM-BThe medium voltage distribution metal clad switchboard, service category LSC2B, with modular cubiclescan be equipped with breaker execution switches, for the following breakdown techniques:• Sulphur hexafluoride• Vacuum packedThe breaker switch positions inside the compartment may be:• Connected position: main and auxiliary circuits connected.• Isolated position: main circuits disconnected; auxiliary circuits (Test) connected orauxiliary circuits (totally isolated) disconnected.• Withdrawn position: main circuits and auxiliary circuits disconnected. Circuits breaker racked out ofthe cubicle.TECHNICAL SPECIFICATIONSTensione nominale Rated voltage KV 12 17,5 24 36Tensione di servizio Service voltage KV 3+10 10+15 15+23 27+30Frequenza nominale Rated frequency Hz 50/60 50/60 50/60 50/60Tensione di prova 1 min.-50 Hz Test voltage 1 min.-50 Hz KV 28 38 50 70Tensione di tenuta ad impulso Impulse withstand voltage KV 75 95 125 170Corrente nominale delle sbarreprincipali - fino a (1)Corrente ammissibile di brevedurata - fino a (2)Rated main busbarcurrent up to (1)Short-time withstandcurrent up to (2)A 4000 3000 3000 2000KA/ls 50 40 31.5 31.5Corrente di cresta -fino a Peak withstand current up to Kéi. 125 100 75 75Metal structureThe cubicle’s self-supporting structure is made up of standardized elements of medium moulding steel sheetwith minimum thickness of 25/10 mm.All structure elements, provided with modular holes, are assembled together by angle junctions in welded plate,electrical points and special screws that ensure strength and electrical continuity.Side and rear curtain wall panels, front and rear doors, cubicle baffles, segregations and supports for thedifferent components are fitted on the structure.The minimum thickness of steel sheet for those elements is 20/10mm. Internal fittings, component supportingpanels, all parts subject to rubbing, bolts, nuts and screws are galvanized and passivated.22

GM-B switchboards are realized by combining theappropriate number of cubicle types available.Each cubicle type is a separate module divided intodifferent cells separated by metal elements: cellbus bar - cell breaker - cell line - cell instrument -cell TV measure (if required).The standardization of cubicle types and componentsgives user the possibility of creating differentCubicle structure type is self-supporting able tohold the different cells and components.On the cubicle’s base (on the rear side) openingshave been provided for the transit of power cablescoming from outside; with regards to the auxiliarycables coming from outside, an opening is providedinside the circuit breaker cell, in a suitableshielded position.medium voltage installations, quick to modify andeasy to upgrade in the future.It is also possible to combine GM-B cubicles withGM-MM cubicles, in those frequent cases wheremedium voltage distribution metal-cladswitchboards are used together with medium voltagecontactors operating switchboards.Following onthe next page23

MAIN BUSBARS AND BRANCHESMAINTENANCE AND CONTINUITY OF OPERATIONMain bus bar in electrolytic copper plate or flatwith standardized sections for rated currents of400-800-1250-1600-2000-2500-3000E-4000A.They may be realized with in air insulation or(on request) with epoxy resin insulating coat,with high mechanical properties, thermal•••Easy inspection (from cubicle front) and easy maintenanceeven with switchboard operating, with elevatesafety of personnel.Reinforced insulation of all live parts minimize thepossibilities of failures between phases and to earth.The separations separating cells prevents spread ofshock resistant and strongly selfextinguishing.fires.All bus bar connections, when coated, are protectedby casings in insulating resin.• All devices are easily accessible after the easy removalof doors and panels.Insulated pressed supports are used for holding the bus bars able to withstand thermal shock and electrodynamicalstress resulting from short circuit currents.The main bus bar usually go through one cubicle to the next without the interposition of diaphragms so that it isformed a continuous conduit.Branches are made similar to the main bus bars and sized according to rated current and related equipments towhich they are to be connected. Connection areas are properly treated or (on request) silver-plated.24

Medium voltage metal clad SwitchboardsSeries Euroclad GM-BPERSONNEL SAFETYGuaranteed by:• Grounding connection on the whole switchboard structure (bus bar in copper with a normal section of250 sq mm) and removable panels for the whole disconnection and connection.• Metal shutters automatically activated during the switch or pull-out of voltage transformer (if provided).• Connections are made from the outside part of switchboard; a set of mechanical interlocking deviceswith a compulsory sequence to prevent wrong connections and any possibility of exposure to live parts.• With the circuit breaker withdrawn protection level for live parts is IP2X (with open doors).• Access to equipments and low-voltage circuits without risk of exposure to medium-voltage components.• Accurate selection of insulating materials based on properties of high fire-proof level and low smoke emission.• Insulating protection and coating on live parts.• Connection and isolating of the circuit breaker with cell door closed (on request).STANDARDSThe main standards applicable to EurocladSwitchboards series GM-B are:IEC 62271-200IEC 60694EXECUTION• For inside with normal protection level: IP2Xinside the switchboard; IP3X on outside housing.• Single surface (1 cell circuit breaker per cubicle)which can be accessed from the back and thefront.• Single surface (1 cell circuit breaker per cubicle)for wall installation, accessible only from thefront.• Double surface (2 cell circuit breakers per cubicle)with access from back and front.• With single or double bus bar system.• For outside with metal cover; it is also possibleto have mobile units (mobile cabins) in specialcontainers.• Internal arc proof in according with IEC 62271-200 Standards.• Higher protection levels in environments withdust and/or liquid.• Special executions to be done on request.25

Medium voltage SwitchboardsAir insulated 24kV Euroclad series GM-BMThe medium voltage metal clad switchboards type GM-BM, service category LSC2B o LSC2A, are very wellmade by high quality materials, according to the standards in force and the security provisions.The switchboards are prefabricated for inside installation and are made up of independent cubicles easy toassembly in order to realize different plan of systems for secondary medium voltage distribution network.The main standards applicable to the switchboards are: IEC 62271-200; IEC 60694.The switchboards GM-BM are made up of typical units, matched together, in which are installed operatingsystems and control, measuring and protecting devices with the related power and auxiliary connection. Thetypical arrival/departure switch unit with classification of continuity of service LSC2B and classification ofP&I diagram, it’s divided in the following isolated cell: auxiliary; switch; cell power cable; cell main bus bar.A safety valve has been obtained in the back side of the switchboard where are addressed the gases underpressure which can develop in case of break due to an internal arc.The switchboards are realized also for service category LSC2A, so the cables compartment and the compartmentswitch form a single compartment.Breaker cellIt is accessible from the front side of the cell; here it’s positionedthe complete switch of the related truck, all accessory needed forits functioning and the insert and withdraw operations. Thebreaker truck can get the following positions:- Connected: normal functioning position, with power circuit andauxiliary circuit;- Isolated: disconnected main circuits-connected auxiliary circuits;- Withdrawn: from position disconnected, position obtained bydisconnecting the auxiliary circuits; it’s possible to withdraw completelythe truck from the cell.Inside the compartment there’s also the following components:- guide for carriage,- insulating bolt which separate the fixed contacts from the internalcompartment,- the fix part of auxiliary connector.The Switch is controlled and operated by the front door closed,that can be opened only with the switch in the partitioned position.Power Cables cellThe cables compartment is accessible from the front lower compartmentthrough the front door, whose opening is subject tothe position of the earthing, with appropriate mechanical locks.The earthing cab be closed only with switch in position partitioned;these blocks also prevent the opening of the earthingdoor open.Inside the compartment are placed also the bar for MV cables,the lower fixed contact, the earthing and, if required, the powerand voltage transformers.Main bars cellIt is the cell placed onthe top rear of the unitwhere are located themain power circuit barsAuxiliary cellThe cell located on the top frontside of the compartment containsall the low voltage equipments,including measuring instruments,and the upper fixed protection relays, control and signallingcontacts.devices, terminal blocks andanything else necessary to makethe entire functional unit as requiredby customer specifications.26

MAIN TECHNICAL SPECIFICATIONSRated voltage U n up toInsulation level:Withstand voltage 50Hz for 1 minuteImpulse withstand voltage 1,2/50 msRated power up toShort lasting power permissible up toPeak power permissibleDuration of short-circuitInternal Breakdown:Short-circuit powerDuration of short-circuitIAC classification24 kV50 kV125 kV1250 A25 kA63 kA1 s25 kA1 sAFLRSAFETY, RELIABILITY, MAINTENANCESwitchboards GM-BM are characterized by a top-level technology that ensures a highstandard of safety, reliability and easy maintenance.The switchboards produced can offer the following advantages:• Total security in performing manoeuvres thanks to appropriate bolts which preventinappropriate manoeuvre.• Safety is due to the installation of medium voltage equipments completely isolatedfrom the low voltage equipment.• Toughness of switchboard carrying structure.• Maximum safety of people working in the installation place, in case of any breakdowndue to internal arc.• Insulation of live parts; appropriate shutter prevent the contact with live parts evenwith carriage switch drawn.• Easy maintenance thanks to the possibility to work with the carriage completelydrawn from the compartment and the accessibility to all equipments.• Availability of a spare carriage switch in order to minimize the time of serviceinterruption.• Easy installation and assembly as the cubicles are already assembled and tested.Front ViewSide ViewINTERLOCKSSpecial electrical and mechanical inter-blockshave been designed in order to ensure thecomplete safety in the execution of normaloperations and maintenance and to avoid theexecution of inappropriate manoeuvres.27

Medium voltage metal enclosedSwitchboards Euroclosed series GM-PMedium voltage metal enclosed switchboards, service category LSC2A, type GM-P with modular cubiclescan be equipped with fixed and removable circuit breakers for the following switching techniques:• Sulphur hexafluoride• Vacuum packedThe different circuit breaker are always combined with bus bar and/or vacuum line isolator.In addition to circuit breakers the GM-P cubicles can also have air insulated or hinged load breakswitch, earth break switch and fuse holders frame etc.., combined together according to installationrequirements.The GM-P switchboards can be realized by assembling the different cubicle types available. Each cubicletype is a module divided into cells separated by metal elements:• Cell Bus bar• Cell Circuit breaker• Cell Lines• Cell Instrument• Cell Terminal box (only for GM-P2)The complete standardization of cubicle types and components enable to create different types ofmedium voltage systems, quick changing and easy expansions.Opening have been provided on the cubicle base for the transit of power cables and auxiliary cablescoming from outside. It is possible to install the switchboard on the wall.28

The cubicle structure is self-supporting and contains various cells and components.The compartment is high 2250 mm for the type GM-P2 and 1950 mm for all other types. To those typecan be added a 300 mm bed in order to have a height of 2250mm (in case it will be used the mixed solutionGM-P2 plus GM-P1 and/or GM-P3).All cubicles , except the ones to be equipped with switches, GM-P1 is 750mm in width and GM-P2, are900mm high and 700 mm wide.The depth of all cubicles is standardized, 1150 mm.EXECUTIONS• For inside with normal protection level:• IP2X inside the switchboard; IP3X outside.• Single or double system of bus bar (the switchboard can beinstalled to the wall)• For outside with appropriate metal cover; it is possible tohave moveable units (mobile cabins) in appropriate containers.• Internal arc proof in accordance with IEC 62271-200 standards.• High protection level in environments with dust and/or liquidprojection.• Special executions to be done on request.STANDARDSThe main standards applicable to the switchboards are:IEC 62271-200; IEC 60694.TECHNICAL SPECIFICATIONSTensione nominale Rated voltage KV 12 17,5 24 36Tensione di servizio Service voltage KV 3+10 10+15 15+23 27÷3oFrequenza nominale Rated frequency Hz 50/60 50/60 50/60 50/6oTensione di prova 1 min.-50 Hz Test voltage 1 min. -50 Hz 1W 28 38 50 70Tensione di tenuta ad impulso Impulse withstand voltage KV 75 95 125 170Corrente nominale delle sbarreprincipali - fino a (1)Corrente ammissibile di brevedurata - fino a (2)Rated main busbarcurrent up to (1)Short-time withstandcurrent up to (2)A 2000 1250 1250 800KA/ls 31.5 25 25 25Corrente di cresta -fino a Pende withstand current up to KA 75 62.5 62.5 62,5The rated voltage of the bus bar are referred to an external temperature of 40 °C.On request and limited to some values, it is possible a duration up to 5s.Following onthe next page29

MAIN BUS BAR AND BRANCHESMain bus bar in flat electrolytic copper bars have standardized sections for rated current 400-630.800-1250-1600-2000 A. Theymay be realized with air insulation or (on request) with a resin insulating coat.Usually bus bars are supported by all-bearing insulator above the bus bar switch disconnectors, resistant to thermal shockand electro-dynamic stress.METALLIC STRUCTUREThe main bus bar usually pass from onecompartment to the next without break in The cubicles ’ structure, self-supporting, is composed of standardizedorder to form a continuous conduit.elements in steel sheet medium moulding, minimum thickness 20/10The branches are realized as main bus bar mm. The main elements of the structure, fitted with modular drillings, areand sized according to the rated current of assembled together by corner joints welded and special screws that ensurestrength and electrical continuity. On the structure are applied steelthe related equipments to which they arelinked.panels with a thickness of 15/10 mm.The joint areas are properly treated or (on Internal accessories, supporting panels and rubbing parts, nuts andrequest) silvered.bots are all galvanized and passivated.30

Medium voltage metal enclosedSwitchboards Euroclosed series GM-PPERSONNEL SAFETYObtained by:• Grounding connection on the whole structure of Switchboard(collecting bus bar with a normal section of 150 sq mm) and the removablepanel for the whole isolator switch and insertion.• The operations are made from outside the switchboard; a series ofmechanical blocks prevent wrong operation and any possibility ofcontact with live parts.• Accessibility to equipments and low voltage circuits without risk ofcontact with medium voltage components.• Careful selection of insulating materials based on properties of highlevel of fire-proof and low smoke emission.MAINTENANCE AND CONTINUITY OFOPERATION• Easy inspection (from cubicle front) and easymaintenance even with switchboard operating,with elevate safety of personnel.• Reinforced insulation of all live parts minimizethe possibilities of failures between phasesand to earth.• The separations separating cells preventsspread of fires.• All devices are easily accessible after the easyremoval of doors and panels.31

Layout: Overall ViMedium voltage metal clad switchboards3k Vcc Euroclad series FM-B/FSAMedium voltage metal clad switchboards type GM-B/FSA are very well made by highquality materials, according to actual standards and security provisions. They have beentested also by the type test as per SINAL laboratories standards that issued the relatedtest reports and approved and certified the tested switchboard.The switchboards are prefabricated for interior installation and constituted of independentcompartment, easy to assembly in order to realize different plan of systems for tractionpower. The main standards applicable to the switchboards are: IEC 62271-200; IEC60694; IEC 50123-1; IEC 50123-6; IEC 50124-1.The switchboards GM-B/FSA are made up of typical units, coupled together, in which are installed theequipments, the operating control device, measurement and protection with the related power connectionand auxiliary. Each compartment is divided in separated cells. The weight is about 1200 kg.Switch cellIt is accessible from the front door of the cell; there is a quick switch withthe related carriage and all accessories needed for its functioning and operationsof connection and disconnection.The positions of switch carriage may be:- connected: position of normal functioning, with power and auxiliary circuitsconnected;- Isolated: disconnected main circuits and auxiliary circuits;- Withdrawn: from position disconnected, it’s the position obtained by disconnectingthe auxiliary circuits; it’s possible to completely withdraw thetruck from the cubicle.Main bus bar cellThe cell contains bus bar omnibus comingfrom the rectification (external to theswitchboard GM-B/FSA) and accessiblefrom the back panel closed by screws.The main bus bar system is designed inorder that the leak insulation in one compartmentwill not interfere on the wholecompartment; it allows the reestablishmentof the system in case ofopening due to malfunction of power compartment.Auxiliary cellThere are two auxiliary cubicles , onewith the carriage breaker, the other onthe front door. Those cubicles, completelyseparated from the active parts,contain equipment in low voltage, operationequipment, control, measurementand protection devices, with relatedpower and auxiliary connection.Terminal cellThe compartment based onthe front upper part of compartmentcontains all terminalsof auxiliary cables comingfrom outside and the terminalconnection.Cables cellThe cable cell is accessible from the rear ofcompartment whose door may be openedthrough metallic blocks from the earthingswitch in position closed; those blocksprevent the opening of earthing switchwhen the door is open. It’s available onrequest the cubicle with front access.32

MAIN TECHNICAL SPECIFICATIONSRated voltage U nVoltage U NeRated withstand voltage U NmInsulation level:Voltage 50Hz for 1 minute between the active parts and the earthVoltage 50Hz for 1 minute between the disconnection distancesAtmospheric impulse voltage 1,2/50 msRated currentOverload current of main bus bar for 2 hOverload current of main bus bar for 5 minutesAcceptable short duration currentAcceptable maximum currentDuration of short circuitProtection degreeInternal fault:Short-circuit currentDuration of short circuitIAC classificationPROTECTION3,0 kVcc3,6 kVcc4,8 kVcc18,5 kV19,5 kV40 kV3000 A6000 A6450 A50 kA71 kA0,25 sIP3050 kA0,25 sAFLRSAFETY, RELIABILITY,MAINTENANCEThe GM-B/FSA switchboards have a hightechnology level which guarantees highsafety, reliability and easy maintenance.Those switchboards offer the following advantages:• Total security with the appropriate interlocks.• Safety due to installation of medium voltage equipments completelyseparated from the low voltage equipments.• Toughness of switchboard carrying structure.• Maximum personnel safety in the installation area.• Live parts completely separated; appropriate shutters prevent the contactwith live parts even with drawer in removed position.• Earth of whole metallic structure, doors and removable elements duringthe disconnection operation.Device line test: the device called Line Testverifies the continuity of contact line before thedisconnection of the switch. This verificationoccurs through an injection of network ratevoltage, with the measure of line resistance,that is compared with the value of resistance.If after three attempts the result is still negative,the line will be declared broken and thedevice cannot be closed.• Easy maintenance as it’s possible to operate with carriage removedfrom the compartment and thanks to the easy accessibility to all theequipments.• Possibility of having a spare breaker carriage which can be used insteadof the carriage in maintenance in order to minimize the time ofsuspension of service.• Easy installation and assembly.Transformer relay and diagnostics: it is arelay type micro CPU dedicated to the systemprotection and the disconnectors diagnostic.The relay functions are:• Diagnostic function: gives information on the generalstatus of disconnectors and detects necessity ofI N T E R -LOCKSAppropriatee l e c t r i c a land/or mechanicalinterlockshavemaintenance on the main wear elements of disconnectors.• Function power gradient: this function checks theflow of power gradient in order to discriminate betweentransients caused by any failure of the enginestart-up online.• Function maximum power protection: it had to observethe power progress and detect overloads.beenew Power compartmentdesignedin orderto guarantee the maximum safety in the execution of normaloperations and maintenance.33

Low voltage distribution switchboardsSeries GM-PC EuropowerThe series Low voltage distribution switchboards, called GM-PC EUROPOWER, is suitable to the primarydistribution in low voltage; they are modular Power Centre switchboards and can be equipped with connectorsin fixed execution or removable, open and/or boxed, connectors of modular type and any other kind ofequipment. The structure is designed in order to ensure toughness and solidity to the switchboard.The cubicles have a base from 500 to 1100mm where can be assembled a 300mm compartment for theauxiliary equipments (command, signalling, measurement, terminals, etc.); height of 2250mm and depth of800/1000/1200/1500mm.Overall view carpentry componentsThe modular structures allows enlargement or changingeven if the switchboard is already installed. The system, infact, can be integrated with other equipments: connectorsboxed up to 3200A and switches for current up to 6300A,with a kit for the assembling.34

MECHANICAL SPECIFICATIONSELECTRICAL SPECIFICATIONSThe compartment self-supporting structure is constitutedby standardized elements in steel sheet ofthickness 20/10 and 30/10. The elements constitutingthe structure, provided with modular openings,are assembled together through special screws. Onthe structure are applied some bumping lateral panels,back doors, front doors, support for differentcomponents. The thickness of those elements are15/10 and 20/10. the pillars, interior accessories,supporting panels are steel galvanized typeSendzimir Z275 DX51D UNI EN 10346; the externalfenders, the front and back doors, the frame are insteel sheet with a minimum thickness of 60 micron,colour RAL 7030 (standard) or any other colour on• Rated voltage: up to 690V• Rated insulation voltage: up to 1000V• Rated frequency: 50-60Hz• Test voltage 1min. 50Hz• Power circuits: up to 3500V• Auxiliary circuits: up to 2000V• Main bus bar rated current: up to 6300A• Short-term rated current admissible: up to100kA/1s• Peak rated current admissible: up to 220kA• Internal arc current: up to 75kA/0,2s (specialexecution on request, according to CEI 17-86standards)request.Carpentry components separated DetailThe front side of switchboard is constituted by modularcomponents.The input of power and auxiliary cables is realizedfrom the top or the bottom; it’s possible to make connectionsthrough bus bar conduits.Following onthe next page35

The GM-PC EUROPOWER switchboards are divided internally through barriers, baffles and isolation in order to allow switchingoperations, maintenance, inspection and any other moves with the maximum safety and ensuring continuity of operation. Theswitchboards are realized according to standards CEI EN 60439-1, CEI EN 61439-1 e CEI EN 61439-2, and utilize separated cubiclesthat can be easily assembled. Here below there are some type of separation through barriers and baffles:Type 1: no separationFunctional unitIn/out jointMain omnibus busbarbusbar Distribution BusbarDistribution Input circuit BusbarInput Output circuitOutput circuitType 2a: separation of bus bar from the functionalunits, the terminal for the external conductors are notseparated from the bus bar.Type 2b: bus bar separated from the functional units,the terminal are separated from the bus bar.Type 3a: separation of bus bar from the functional unitsand separation of all functional units, separation ofterminals for the external conductors from the functionalunits but not separated from the bus bar.Type 3b: separation of bus bar from the functional unitsand separation of all units one from the other,separation of terminals for the external conductors butnot one from the other and separated from the bus bar.Type 4a: separation of bus bar from the functional unitsand separation of all functional units one from the other,included the terminals for the external conductors thatare in the same compartment of matched functionalunit.Type 4b: separation of bus bar from the functional unitsand separation of all functional units from one toanother, included the terminals for the externalconductors that are not in the same compartment, but indifferent and separated cubicles .36

Low voltage distribution switchboardsSeries Europower GM-PCBUS BAR SYSTEMSThe omnibus bus bar systems are arranged for current rate from250/1600/2000/2500/3200/4000/5000/6300A. They are made up of copper plates Cu-ETP according to UNI5649/1 standards. In the switchboards GM-PC EUROPOWER the main omnibus bus bar are placed in therear upper, middle or lower part of the switchboard and they distribute the current to the different structuresof the switchboard; the distribution bus bar are placed in vertical position in the rear part of theswitchboard, on the right side of the compartment,they are connected to the mainbus bar and distribute the power to theoutput switches. The bus bar system issupported by the door-bars in polyesterresin reinforced with fibreglass and arecharacterized by other electrical and mechanicalfeatures which are a guaranteeagainst the electrodynamics forces in theshort circuits.NORMAL SERVICE CONDITIONSSTANDARDSUsually the switchboards are supplied for thefollowing service conditions:• Minimum room-temperature: -5°C• Maximum room-temperature: +40°C• Maximum humidity: 50%• Altitude above sea level: £ 1000m• CEI EN 60439-1: Type-tested low-voltage switchgearand control-gear assembly• CEI EN 61439-1: low-voltage switchgear and controlgearassemblies (LV switchboard) - Part 1: Generalrules• CEI EN 61439-2: specific requirements of powerswitchgear and control-gear assemblies (PSC-ASSEMBLIES) - Part 2: power switchgear• CEI 64-8: Low voltage electrical systems• Low voltage guideline 2006/95/CE• All equipments match the related standards.37

Metal clad low voltage switchboard750 Vcc Euroclad Series GM-B/TFMThe metal clad low voltage distribution switchboard type GM-B/TFM are realized with high quality materials,actual standards and security provisions. They have been tested through the type test as per standards ofCESI experiment station SINAL recognised, that released the related test reports and certified theswitchboard tested.The switchboard are prefabricated for inside installation and are constituted by standardized cubicles easyto assembly to realize different systems for power supply in tram ways, trolleybus and underground.The main standards applied to the switchboards are: CEI EN 60439-1; CEI EN 61439-1; CEI EN 61439-2;CEI 17-86; CEI EN 62271-200; CEI EN 50123-1; CEI EN 50123-6; CEI EN 50124-1.MAIN TECHNICAL SPECIFICATIONSRated voltage U nRated voltage U NeRated insulation voltage U NmInsulation degree:Withstand voltage 50Hz for 1 minute between the active parts and theearthWithstand voltage 50Hz for 1 minute between the disconnection distanceImpulse withstand voltage 1,2/50 msRated currentShort-time current in main and protection circuitsPeak current in main and protection currentDuration of short circuitProtection degreeBreakdown due to the internal arc:Short circuit currentDuration of short circuit750 Vcc900 Vcc1800 Vcc7 kV8,3 kV15 kVfino a 5000 A70 kA110 kA0,25 sIP4070 kA0,25 s38

The GM-B/TFM switchboard are made up of typical units: Power supply unit, Damper Unit and Unit rectifier,matched together, where are installed operating equipments, rectifier groups, control device, measure andprotection, with the related power and auxiliary connection, divided in separated units.Main bus bar cellThe unit is placed in the rear part of cubiclesand contains the omnibus bus bar of directcurrent which are accessible from the relatedpanel screw locked.Auxiliary cellThe auxiliary unit is placed in the front part of compartment.The Power supply unit is divided in two parts inorder to facilitate maintenance work: one is placed togetherwith the carriage switch and the other on thefront door. Those units contain low voltage equipment,Terminal cellcontrol, signalling, measure and protective devices.This unit is placed on the front upper part ofcompartment and contains all auxiliary cablesterminals coming from outside and connectingterminal of switchboard compartment.Power supply Unit / Rectifier UnitIt is accessible from the front door of active compartment:it’s allocated the switch and the complete rectifierof related carriage. The carriage switch/rectifier can haveCables cellThe power supply cables unit is accessiblefrom the back of compartment through adoor which can be opened by appropriatemechanical blocks.The unit cables Damper and Rectifier isplaced in the back part and accessible fromthe related panel closed by screws.the following positions:- connected: position of normal functioning, with powerand auxiliary circuits connected;- isolated: power circuits disconnected and auxiliary circuitsconnected;- withdrawn: position obtained from the position disconnected,by disconnecting the auxiliary circuits; it is possibleto remove completely the truck unit.Following onthe next page39

Fig. 2 Overall view Damper UnitSECURITY, RELIABILITY, MAINTENANCEThe GM-B/TFM switchboard have a high level of technology which guarantee high level of safety, reliability andeasy maintenance to the switchboardsThe switchboards offer the following advantages:• Total safety in the execution of operation thanks to appropriate interlocks which prevent wrong moves.• Safety due to installation of power equipment completely separated from the low voltage equipments.• Particular toughness of main structure of switchboard and the separation compartment in steel sheet.• Maximum safety for the personnel working in the installation area.• Live parts completely separated; appropriate shutters prevent the contact with live part even with switch/rectifier removed.• Ground wire system of the whole structure, the doors and the removable elements during the disconnection operation.• Easy maintenance thanks to the possibility of operate with carriage completely removed.• Disposal of a spare switch carriage to use instead of the carriage in maintenance.• Easy installation and assembly as the cubicles are transported to the installation area already tested.40

Metal clad low voltage switchboard750 Vcc Euroclad Series GM-B/TFMFig. 3 - Overall view of Rectifier UnitINTERLOCKSSpecial electrical and/or mechanicalinterlocks have been designed inorder to guarantee the maximumsafety in the execution of normaloperations and maintenance andprevent execution of inappropriatemoves.PROTECTIONSThe cubicles are provided with all components needed to guarantee thecorrect functioning and safety of whole system and personnel in charge:• Device Line test: the device Line Test verifies that the contact line hasno interruption before the closing of the switch.• Wire insulation system check: verify whether the progressive lossof insulation of the connecting cable and the contact line.• Protection relay and diagnostics: it’s a relay with a micro CPC withfunctions of protection and diagnostic.• Relay of maximum voltage c.c. (45) and maximum voltage c.a.(59): their function is to order the closing of earth contactor of damperbus bar, in case the voltage c.c. and c.a. Are dangerous.• Direct connection relay (76): it’s a relay of maximum current .• Earth breakdown relay (64): allows the detection of earth breakdownin DC.Fig. 1 - Overall view of Power Supply Unit41

Low voltage Motor Control switchboardEurocenter Series GM-MCCThe low voltage motor control GM-MCC switchboards with modular cubicles and drawers, can be equipped withoperating-isolator circuit breakers plus fuse holder bases or boxed type automatic limiter circuit breakers, operatingcontactors, thermal relay and auxiliary control and signalling equipments.Two different versions are available:- GM-MCC/F: with fixed drawer- GM-MCC/E: with removable drawerThanks to drawer modularity it is possible to carry out each low-voltage motor start-up diagram in thewidest range of ratings and to use equipment produced by different manufacturers.As it is also possible to intervene in any motor start-up drawer, on a live switchboard, maximum operatingcontinuity is guaranteed.Another advantage is that the drawers (MCC/E) provided with plug-in pliers and accurate rabbets, can bequickly and easily assembled and replaced, facilitating modifications and future upgrades. It is also possibleto match GM-MCC cubicles with compartment type GM-PC, in those frequent cases where low voltagemotor control switchboards and low voltage distribution switchboards.42

The GM-MCC switchboards can be made by combining the different cubicle types available. Each cubicle typeis a module on its own divided into various cells. Each cubicle type is divided in 3 main areas, separated bymetal elements:• Area 1: cubicle front for circuit breaker or isolator drawers, measuring and/or protection instruments and forauxiliary services. This area can be made with fixed (MCC/F) or removable drawers (MCC/E).• Area 2: right cubicle front for power cables (outputs), auxiliary cables and related accessories. This area issupplied with a closing door for the whole height.• Area 3: cubicle rear for main bus bar system (installed horizontally) and distribution bus bar system(installed vertically).Cubicle structure is self-supporting and can hold the different cells, drawers and components. On the cubicle’sbase and/or roof panel near the cable cell, in accordance with installation requirements, opening are providedfor the passage of power and auxiliary cables coming from outside.TECHNICAL SPECIFICATIONSTensione nominale di impiego fino a Rated voltage up to v 690Tensione nominale di isolamento fino a Rated insulation voltage up to V 1000Frequenza nominale Rated frequency Hz 50/60Tensione di prova 1 min.-50Hz* circuiti di potenza - fino a* circuiti ausiliari - fino aCorrenti nominali sbarre principaliorizzontali (normalizzate) (1)Correnti nominali sbarre di derivazioneverticali (normalizzate) (1)Correnti ammissibili di breve durata(normalizzate)Test voltage 1 min.-50Hz* power circuits - up to* a u x i l i a r y c i r c u i t s - u p t oVV35002000Rated horizontal main bus barcurrent (standardized) (1) A 800-1250-1600-2000Rated vertical branch bus barcurrent (standardized) (1) A 400-600-800Short-time withstand current(standardized)KA/1s 15-25-35-50Corrente di cresta ammissibile fino a Peak withstand current up to KA 105(i) The rated current of bus bar are referred to a temperature external the switchboard of 40 °C.MAINTENANCE AND CONTINUITY OF SERVICE- Easy inspection (from cubicle front) and easy maintenanceeven with switchboard operating, with elevate safety of personnel.- Reinforced insulation of all live parts minimize the possibilities offailures between phases and to earth.STANDARDS• CEI EN 60439-1• CEI EN 61439-1• CEI EN 61439-2Following onthe next page43

PERSONNEL SAFETYObtained by:• Ground wire of whole switchboard structure (bus bar in copper plate with a normal section of 200 sq mm) andremovable components for all transit of connection and disconnection.• Insulating cut-off automatically activated during the movement of drawers (if removable).• The moves are made from outside the switchboard; it is possible to access to live parts by using some tools or solutionswhich prevent any contact with the live parts.• With drawer disconnected or removed, the protection degree for the part under voltage is IP2X.• Careful selection of insulating materials based on characteristics of high degree of fire proof and low smoke emission.• The separation between the different units prevent the spread of any fire.• All the equipments are easily accessible, by prior removal of drawers (MCC/E), doors and/or panels (MCC/F).METALLIC STRUCTUREMAIN BUS BAR AND BRANCHESThe compartment structure, self-supporting, ismade up of standardized elements in steel sheetwith a minimum thickness of 25/10 mm.The structure elements provided with modular holesare assembled together through joints in steelsheets with electrical points and special screws.On the structure are employed modular drawers(removable or fixed), side and rear bumping panels,front doors, subdivisions and disconnections,support for different cubicles . The minimum thicknessof steel sheet is 15/10 mm.The internal accessories, the supporting panel,bolts and screws are galvanized and passivated.The main bus bar, in copper plate have standardizedsections for rated current of 800-1250-1600-2000 A.They are realized with air insulation and are divided.The support of bus bar is realized with modular supportingstamped in fire proof material, with high mechanicalfeatures, which may support thermal andelectrodynamics resulting from the short circuit current.The main bus bar usually transit from one compartmentto the other in order to form a continuous conduit.The branches are realized as main bus bar andhave standardized sections for rated current 400-600-800 A.The junction area are processed (on request) andsilvered.44

Low voltage motor control switchboardEurocenter Series GM-MCCEXECUTION• For inside with normal protection level:IP2X inside the switchboard;IP3X on the external surface.On two different executions:MCC/E - MCC/F.• For outside with appropriate metal cover; it is also possible to have mobile units (mobile cabins) in specialcontainers.• With higher protection level for environments with presence of dust and/or liquid projection.• Special executions on request.45

Gemmo SpAViale dell’Industria, 236057 Arcugnano (Vicenza)Tel. +39 0444 959 595Fax: +39 0444 961 551www.gemmo.cominfo@gemmo.comB.A. Gemmo Switchboards(Quadri)Viale dell’Industria, 236057 Arcugnano (Vicenza)Tel. +39 0444 959 439Fax segreteria: +39 0444 289 528Fax uff. tecnico: +39 0444 959 528GD3.3.11 – cat. 08/it47