CE - B36 - C - en - REV.00 2011.9 EDIU VOLTAGE
EDIU VOLTAGE APPLICATION CE-B etal 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 Utilities and Power Plants Power Stations Transformer stations ain and auxiliary switchboards Industry etallurgy Pulp and Paper Cement Chemical Rolling mills Automotive Petrochemical Oil and gas STANDARD CEI 17-6 Italian standard IEC 62271-200 International standard IEC 60-298 (replaced by IEC 62271-200) DPR 547 Italian accident prevention Standard IEC 60129 Earthing switches IEC 60694 High voltage switchgear IEC 62271 Circuit breakers These switchboards have performed all relevant tests carried out by qualified laboratories. arine applications Drilling platforms Off-shore oil rigs Ferries and ships Services Hospitals Infrastructures Data center Transports Airports Ports Railways 2 CE - B36 - C - en - REV.00 2011.9 3
FEATURES General Characteristics According to the international standard IEC 62271-200 the CE-B switchboards are classified for loss of service continuity category as LSC2B with partition class P. The optional version CE-BA is also foreseen fully withstanding Earthing Circuit-breaker: earthing of circuit-breaker is ensured on the whole isolating stroke by means of a sliding jaw type contact on the copper conductor which is directly connected with the earthing bus-bar. Easy inspection and maintenance: through easy access to the equipment in the various compartments by hinged doors or removable bolted panels and through the isolation and withdrawal on truck of circuitbreakers, VT, fuses. to internal arc fault: Internal arc classification (IAC) Accessibility type: Components: all main components such as CTs, VTs, etc., are positively earthed. 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) R ( Rear) echanical characteristics Enclosure: Under normal operation the degree of protection Earthing bus-bar: the earthing bus-bar in copper with a normal 350 mmq. cross section runs along the length of the 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 is of IP 31 for metal enclosure and IP2 in the LV instrument compartment. The individual structures are made of die-bended galvanized sheet steel elements of no less than 2 mm thickness. The external coloured panels are realized with carbon steel Access and limited overall dimensions: the overall dimensions are particularly restricted if compared with the high performances achieved for the insulation level, rated busbars current and short-circuit current. withdrawing operations; metal shutters automatically operated during circuit breaker truck movement; metal shutters automatically operated during VTs truck movement in it s compartment; painted with electrostatic epoxy powder, the standard colour is light grey RAL 7035 smooth (all RAL scale colours or specific colours can be realized on request). Standard painting minimum thickness of 60 +/- 10 microns is guaranteed. Versatility and flexibility: any single line diagram can be realized to meet the most varied technical requirements. Special and customized adaptation units allow easy extension of existing switchboards even from supplied by other suppliers or not jet in production. insulating protections and coatings are available for live parts; easy access to low voltage apparatus and control wirings without any risk of accidental contact with medium voltage parts; set of mechanical and electromechanical interlocks; Standard routine factory tests: Structure: all structural parts are solidly fastened together by various signalling and control devices. Visual inspection and check. special screws ensuring a good electrical contact between aximum service reliability: reinforced echanical sequence operations. the connected parts. Nuts and bolts used to assemble structure and enclosure are galvanized and passivated with minimum thickness of insulation of all live parts minimizes the occurrence of faults between phases or to earth. The various compartments of each cubicle are fully segregated and can, besides, be simply No fire risk: metal partitions of compartments and use of self-estinguishing insulating material prevent fires from spreading. Cabling check. Electrical sequence operations. Insulation test. 12 microns. and rapidly inspected. As a matter of fact, equipment such as circuit-breakers, instrument transformers and terminals are readily accessible for inspection and maintenance purposes. 4 CE - B36 - C - en - REV.00 2011.9 5
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 Rated current max. A 2500 Rated current with forced ventilation ** max. A 3150 Rated current with two breakers in parallel ** max. A 4000 Earthing switch echanical lock to prevent the earthing switch closing if the circuit-breaker is in connected position On the circuit-breaker echanical lock to prevent the connection or disconnection of the circuit breaker when closed echanical lock to prevent the circuit breaker connection when the earthing switch is in closed position echanical lock to prevent the disconnection of auxiliary connector with circuit breaker in connected position echanical lock to prevent the manual opening of the shutters when the circuit breaker is removed from the compartment. The shutters can only be operated by the circuit breaker truck. echanical protection (IP20) form live parts even with door open is always maintained with circuit breaker in connected and disconnected position. On the VT s compartment (if present) echanical lock to prevent opening of the door when VTs are in connected position. echanical lock to prevent the manual opening of the 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 Dimensions Normal Service Conditions Width (mm) 1000 aximum ambient temperature C +40 Height 2475 inimum ambient temperature C -5 Height (mm) - IAC 2925 Height m a.s.l. 1000 Depth (mm) 2550 Depth (mm) - VTS 3150 aximum relative humidity % 95 For different conditions contact our offices. Circuit-breaker compartment Busbar compartment Cable feeder compartment Dimensions could be affected by specific equipment and configuration. 6 CE - B36 - C - en - REV.00 2011.9 7
CONSTRUCTION H 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 B Circuit-breaker compartment This compartment is designed to accommodate the circuitbreaker, contactor or link complete of its withdrawable truck and all mechanical parts required for the extraction. The device is provided with auxiliary switches for signalling the connected position and disconnected/test position. C Cable feeder compartment The cable compartment is accessible from the rear of the cubicle by removing the panel or by opening the eventual door. Copper terminals are arranged and sized to allow easy connection with cables. D Busbar compartment This compartment contains the main bus-bars which are directly supported by the lower fixed isolating contacts of the circuit-breakers and isolator supports fixed on the structure. E Wiring duct for interconnections On the cubicle roof front side, a wiring duct is provided to hold the auxiliary connections between the various cubicles and towards the external installation. F Voltage transformer compartment (VT compartment) This compartment can contains the fixed or draw-out version voltage transformers and the related fuses The draw-out version allows VTs and fuses replacement in safe conditions even with switchbord on voltage. 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. G Earthing switch The unit can be equipped with Casagrande Elettrocostruzioni CE-SEZ earthing switch. The switch is activated with an high speed rotating snap, sized to conduct the rated short 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. 8 CE - B36 - C - en - REV.00 2011.9 9
VERSIONS AND CONFIGURATIONS Optional TYPICAL UNITS Special Versions Environment For special environments and temperature For indoor use with protection degree up to IP54 For outdoor use in metal box up to IP56 or NEA 4 Connection Incoming/outgoing by cables form the TOP Incoming/outgoing by bus duct form the TOP Options and accessories Available Locks Key locks permitting the key to be released with Circuit Breaker locked in open positions Key locks permitting the key to be released with Circuit Breaker locked in disconnected position Key locks permitting the key to be released with circuit breaker door closed Key lock permitting the key to be released with earthing switch closed and locked in closed position Key lock permitting the key to be released with earthing switch open and locked in open position Electromechanical lock to prevent closing of earthing switch echanical lock to allow door opening only if circuit breaker is in disconnected position Padlock facility on circuit breaker shutters in closed position Padlock facility to prevent circuit breaker connecting or disconnecting movement Padlock facility to prevent opening or closing of earthing switch Padlock facility on circuit breaker door Accessories Light or pressure device to limit internal arc fault duration Circuit breaker trolley for handling when removed from the compartment Handle for circuit breaker connecting or disconnecting movement Handle for earthng switch command Example of configuration Outgoing feeder Incoming Bus-tie Bus-riser Incoming Outgoing feeder 1000 1000 1000 1000 1000 1000 10 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: info@casagrande.vr.it Production Branch: Contrada Piana Z.I. 86019 Vinchiaturo (Campobasso) Italy Tel. +39 0874 340225 Fax +39 0874 340227 www.casagrande.vr.it