MEDIUM VOLTAGE CE-BF SWITCHBOARDS. UP TO 40.5 kv. CE - BF - C - en - REV

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1 CE - BF - C - en - REV

2 APPLICATION CE-BF Switchbords up to 40.5 kv are designed for use in public and industrial distribution system up to 40,5KV for the operation and protection of lines, transformers, capacitors banks, and for command of meltshop Electrical Arc Furnace (EAF and LF switchbords). TYPICAL USES Transformer stations Electric arc furnace Leadle furnace Distribution switchboards STANDARD CEI 17-6 Italian standard IEC International standard IEC (replaced by IEC ) DPR 547 Italian accident prevention Standard IEC Earthing switches IEC High voltage switchgear IEC Circuit breakers These switchboards have performed all relevant tests carried out by qualified laboratories. 2 CE - BF - C - en - REV

3 FEATURES General Characteristics According to the international standard IEC the CE-BF Switchboards are classified for loss of service continuity category up to LSC2B. The switchboards are designed for distribution systems and command of furnace transformer with typical EAF/LF heavy duty cycles. Mechanical characteristics Enclosure: Under normal operation the degree of protection is of IP 31 for metal enclosure and IP2X 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 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. Structure: all structural parts are solidly fastened together by special screws ensuring a good electrical contact between the connected parts. Nuts and bolts used to assemble structure and enclosure are galvanized and passivated with minimum thickness of 12 microns. 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. Components: all main components such as CTs, VTs, etc., are positively earthed. Doors: are connected to the frame by a 25 mmq. cross section flexible braids. 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. 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 yet in production. Maximum service reliability: reinforced 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 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. 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. Easy installation and connection: the cubicles are factory assembled and tested before being shipped to site, therefore they only need to be secured to the floor, coupled together and connected to the external circuits. Personnel safety ensured by: positive earthing on the entire switchboard structure earthing of circuit-breaker frame throughout racking-in or withdrawing operations; shutters automatically operated during circuit breaker truck movement; 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; various signalling and control devices. No fire risk: metal partitions of compartments and use of self-estinguishing insulating material prevent fires from spreading. Standard routine factory tests: Visual inspection and check. Mechanical sequence operations. Cabling check. Electrical sequence operations. Insulation test. 4 CE - BF - C - en - REV

4 TECHNICAL DATA SAFETY INTERLOCKS Electrical Data Rated voltage kv 17, ,5 Rated power frequency withstand voltage (1min) kv Rated lightning impulse withstand voltage kv Rated frequency Hz 50/60 50/60 50/60 50/60 Rated short-time withstand current (3 sec) ka ,5 Peak current ka Rated current Up to A Rated current with two breakers in parallel ** max. A Earthing switch Mechanical key lock to prevent the earthing switch closing if the circuit-breaker is in connected position On the circuit-breaker Mechanical lock to prevent the connection or disconnection of the circuit breaker when closed Mechanical key lock to prevent the circuit breaker connection when the earthing switch is in closed position Mechanical lock to prevent the disconnection of auxiliary connector with circuit breaker in connected position if the door lock option is present Mechanical 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. Mechanical protection (IP20) form live parts even with door open is always maintained with circuit breaker in connected and disconnected position. Dimensions Normal Service Conditions Width (mm) Height 2475 Depth (mm) Depth (mm) - VTS 3150 Maximum ambient temperature C +40 Minimum ambient temperature C -5 Height m a.s.l Maximum relative humidity % 95 Dimensions could be affected by specific equipment and configuration. For different conditions contact our offices. Circuit-breaker Withdrawahle circuit braker Bus Bars compartment 6 CE - BF - C - en - REV

5 SIEMENS SEMTRN PAC3200 CONSTRUCTION DISTRIBUTION SYSTEMS FURNACE SYSTEMS A E D B C A G A E D B B C F G C F G 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 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. 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 F Voltage transformer This area can contains the fixed or draw-out version voltage transformers and the related fuses This equipment 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. C Cable feeder compartment On the cubicle roof front side, a wiring duct is provided to hold the auxiliary connections between the various cubicles and The cable compartment is accessible from the rear of the towards the external installation. 8 CE - BF - C - en - REV

6 SIEMENS SEMTRN PAC3200 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 NEMA 4X 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 Mechanical 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 Handle for circuit breaker connecting or disconnecting movement Handle for earthng switch command Motorized command for switches DISTRIBUTION SYSTEMS FURNACE SYSTEMS Configuration with breakers in parallel 10 CE - BF - C - en - REV

7 Headquarters and Factory: via G. Rossini, Castel d Azzano (Verona) Italy Tel Fax Production Branch: Contrada Piana Z.I Vinchiaturo (Campobasso) Italy Tel Fax

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