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MEDIUM VOLTAGE CE-B36 METAL CLAD SWITCHBOARDS CE - B36 - C - en - REV.00 2011.9 CE-B Metal Clad switchboards are designed for use in public and industrial distribution system up to 36kV for the operation and protection of lines, generators, transformers, motors, capacitor banks. The switchboards are composed combining the various typical standard cubicles. TYPICAL USES MEDIUM VOLTAGE CE-B36 METAL CLAD SWITCHBOARDS APPLICATION MEDIUM VOLTAGE CE-B36 METAL CLAD SWITCHBOARDS Utilities and Power Plants • Power Stations • Transformer stations • Main and auxiliary switchboards Industry • Metallurgy • Pulp and Paper • Cement • Chemical • Rolling mills • Automotive • Petrochemical STANDARD • Oil and gas CEI 17-6 Italian standard Marine applications IEC 62271-200 International standard • Drilling platforms IEC 60-298 (replaced by IEC 62271-200) • Off-shore oil rigs DPR 547 Italian accident prevention Standard • Ferries and ships IEC 60129 Earthing switches IEC 60694 High voltage switchgear Services IEC 62271 Circuit breakers • Hospitals • Infrastructures These switchboards have performed all relevant tests carried out by qualified laboratories. • Data center Transports • Airports • Ports • Railways 2 CE - B36 - C - en - REV.00 2011.9 3 MEDIUM VOLTAGE CE-B36 METAL CLAD SWITCHBOARDS FEATURES General Characteristics Earthing Easy inspection and maintenance: According to the international standard IEC 62271-200 Circuit-breaker: earthing of circuit-breaker is ensured on through easy access to the equipment in the various the CE-B switchboards are classified for “loss of service the whole isolating stroke by means of a sliding jaw type compartments by hinged doors or removable bolted panels continuity category” as LSC2B with partition class PM. contact on the copper conductor which is directly connected and through the isolation and withdrawal on truck of circuit- The optional version CE-BA is also foreseen fully withstanding with the earthing bus-bar. breakers, VT, fuses. to internal arc fault: Components: all main components such as CTs, VTs, etc., • Internal arc classification (IAC) are positively earthed. • Accessibility type: Easy installation and connection: the cubicles are factory assembled and tested before being A (restricted to authorized personnel only) Doors: are connected to the frame by a 25 mmq. cross shipped to site, therefore they only need to be secured to F (Front) section flexible braids. the floor, coupled together and connected to the external L (Lateral) Earthing bus-bar: the earthing bus-bar in copper with a R ( Rear) normal 350 mmq. cross section runs along the length of the Mechanical characteristics Enclosure: Under normal operation the degree of protection is of IP 31 for metal enclosure and IP2X in the LV instrument switchboard, thus ensuring maximum safety for personnel and equipment. circuits. Personnel safety ensured by: •positive earthing on the entire switchboard structure •earthing of circuit-breaker frame throughout racking-in or withdrawing operations; compartment. Access and limited overall dimensions: The individual structures are made of die-bended galvanized the overall dimensions are particularly restricted if compared breaker truck movement; sheet steel elements of no less than 2 mm thickness. with the high performances achieved for the insulation level, •metal shutters automatically operated during VTs truck The external coloured panels are realized with carbon steel rated busbars current and short-circuit current. movement in it’s compartment; painted with electrostatic epoxy powder, the standard •metal shutters automatically operated during circuit •insulating protections and coatings are available for live colour is light grey RAL 7035 smooth (all RAL scale colours Versatility and flexibility: or specific colours can be realized on request). Standard diagram can be realized to meet the most varied technical •easy access to low voltage apparatus and control wirings painting minimum thickness of requirements. Special and customized adaptation units allow without any risk of accidental contact with medium voltage easy extension of existing switchboards even from supplied parts; by other suppliers or not jet in production. •set of mechanical and electromechanical interlocks; Standard routine factory tests: •various signalling and control devices. • Visual inspection and check. 60 +/- 10 microns is guaranteed. Structure: all structural parts are solidly fastened together by service any single line reliability: parts; special screws ensuring a good electrical contact between Maximum the connected parts. insulation of all live parts minimizes the occurrence of faults No fire risk: metal partitions of compartments and use • Cabling check. Nuts and bolts used to assemble structure and enclosure between phases or to earth. The various compartments of of self-estinguishing insulating material prevent fires from • Electrical sequence operations. are galvanized and passivated with minimum thickness of each cubicle are fully segregated and can, besides, be simply spreading. • Insulation test. 12 microns. and rapidly inspected. As a matter of fact, equipment such as • Mechanical sequence operations. reinforced circuit-breakers, instrument transformers and terminals are readily accessible for inspection and maintenance purposes. 4 CE - B36 - C - en - REV.00 2011.9 5 MEDIUM VOLTAGE CE-B36 METAL CLAD SWITCHBOARDS TECHNICAL DATA SAFETY INTERLOCKS Electrical Data Rated voltage kV 36 Rated power frequency withstand voltage (1min) kV 70 Rated lightning impulse withstand voltage kV 170 Rated frequency Hz 50/60 Rated short-time withstand current (3 sec) kA 31,5 Peak current kA 80 Internal arc withstand current IAC-FLR (1sec)* kA 31,5 Earthing switch • Mechanical lock to prevent the manual opening of the • Mechanical lock to prevent the earthing switch closing if the circuit-breaker is in connected position shutters when the circuit breaker is removed from the compartment. The shutters can only be operated by the circuit breaker truck. On the circuit-breaker • Mechanical lock to prevent the connection or disconnection of the circuit breaker when closed • Mechanical protection (IP20) form live parts even with door open is always maintained with circuit breaker in connected and disconnected position. • Mechanical lock to prevent the circuit breaker connection when the earthing switch is in closed position On the VT’s compartment (if present) • Mechanical lock to prevent opening of the door when VTs are in connected position. Rated current max. A 2500 Rated current with forced ventilation ** max. A 3150 Rated current with two breakers in parallel ** max. A 4000 • Mechanical lock to prevent the disconnection of auxiliary • Mechanical lock to prevent the manual opening of the connector with circuit breaker in connected position shutters when the VTs are removed from the compartment. The shutters can only be operated by the VTs truck. Note * Internal arc withstanding in option ** Type tested Normal Service Conditions Dimensions Width (mm) 1000 Maximum ambient temperature C° +40 Height 2475 Minimum ambient temperature C° -5 Height (mm) - IAC 2925 Height m a.s.l. ≤ 1000 Depth (mm) 2550 Maximum relative humidity % 95 Depth (mm) - VTS 3150 Circuit-breaker compartment Busbar compartment Cable feeder compartment For different conditions contact our offices. Dimensions could be affected by specific equipment and configuration. 6 CE - B36 - C - en - REV.00 2011.9 7 MEDIUM VOLTAGE CE-B36 METAL CLAD SWITCHBOARDS H CONSTRUCTION W A Instrument compartment All the low voltage equipment can be housed in the instrument compartment, which is usually placed above the circuit-breaker compartment connection with cables. This compartment can contains the fixed or draw-out version voltage transformers and the related fuses D Busbar compartment The draw-out version allows VTs and fuses replacement in B Circuit-breaker compartment This compartment contains the main bus-bars which are safe conditions even with switchbord on voltage. This compartment is designed to accommodate the circuit- directly supported by the lower fixed isolating contacts breaker, contactor or link complete of its withdrawable of the circuit-breakers and isolator supports fixed on the truck and all mechanical parts required for the extraction. structure. The device is provided with auxiliary switches for signalling This compartment can be located in incoming or outgoing feeder cubicles as well as in bus tie cubicles. The device could be provided with auxiliary switches for signalling the “racking-in” and “racked-out position. E Wiring duct for interconnections G Earthing switch On the cubicle roof front side, a wiring duct is provided to hold The unit can be equipped with Casagrande Elettrocostruzioni C Cable feeder compartment the auxiliary connections between the various cubicles and “CE-SEZ” earthing switch. The switch is activated with an The cable compartment is accessible from the rear of the towards the external installation. high speed rotating snap, sized to conduct the rated short the “connected position” and “disconnected/test position”. 8 Copper terminals are arranged and sized to allow easy F Voltage transformer compartment (VT compartment) cubicle by removing the panel or by opening the eventual door. CE - B36 - C - en - REV.00 2011.9 circuit making current when close to under load. The speed of the snap action closing operation is independent of controls. A manual switch operating lever is provided on the front of the switchbord. The device is provided with auxiliary switches for signalling the open and closed positions. H Gas exhaust duct (Optional) The gas exhaust duct, positioned on the top of the cubicles, collects and ejects outside the safety area the gas resulting by the eventual internal arc fault. 9 MEDIUM VOLTAGE CE-B36 METAL CLAD SWITCHBOARDS VERSIONS AND CONFIGURATIONS TYPICAL UNITS Optional • Key lock permitting the key to be released with earthing Special Versions switch open and locked in open position Environment • Electromechanical lock to prevent closing of earthing switch • For special environments and temperature • Mechanical lock to allow door opening only if circuit breaker • For indoor use with protection degree up to IP54 is in disconnected position • For outdoor use in metal box up to IP56 or NEMA 4X • Padlock facility on circuit breaker shutters in closed position • Padlock facility to prevent circuit breaker connecting or Connection disconnecting movement • Incoming/outgoing by cables form the TOP • Padlock facility to prevent opening or closing of earthing • Incoming/outgoing by bus duct form the TOP switch • Padlock facility on circuit breaker door Options and accessories Accessories Available Locks • Light or pressure device to limit internal arc fault duration •Key locks permitting the key to be released with Circuit • Circuit breaker trolley for handling when removed from the Breaker locked in open positions compartment • Key locks permitting the key to be released with Circuit •Handle for circuit breaker connecting or disconnecting Breaker locked in disconnected position movement •Key locks permitting the key to be released with circuit •Handle for earthng switch command breaker door closed •Key lock permitting the key to be released with earthing switch closed and locked in closed position Example of configuration Outgoing feeder Incoming Bus-tie Bus-riser Incoming Outgoing feeder 1000 1000 1000 1000 1000 1000 X M 10 X M X M X M X M CE - B36 - C - en - REV.00 2011.9 11 Headquarters and Factory: via G. Rossini, 24 37060 Castel d’Azzano (Verona) Italy Tel. +39 045 8546511 Fax +39 045 8520214 E-mail: [email protected] Production Branch: Contrada Piana Z.I. 86019 Vinchiaturo (Campobasso) Italy Tel. +39 0874 340225 Fax +39 0874 340227 www.casagrande.vr.it