Metal clad dtype switchgear

Transcription

1 Metal clad dtype switchgear

2 COMPANY PROFILE M.EL.COS. was founded in Arezzo (Italy) in 1983 by ex-employees from Costruzioni Elettromeccaniche Banchelli, leader company in its field, today can boast about high professional competence and about modern and updated technologies in the electromechanical field. Since the beginning M.EL.COS. focused on the production of Medium Voltage switchgears, steel structures, Low Voltage switchgears and outdoor cabinets in rolled section and nowadays the company products are well-known and appreciated. Cooperation is the key action of the company success, in fact only with mutual efforts of project, production and marketing activities, it is possible to satisfy the customer needs strictly related to high volumes, quality, lowcosts, and on-time deliveries. The development of the organization of production and managing activities underlines the will to follow the innovation trend and, together with the qualification of personnel, allows the company to achieve high level goals. One of these goals is the quality certification VISION 2000 concerning the products and services. M.EL.COS. is now also able to match, in a very flexible way, standard product lines with special executions in order to better fulfill every single request from the customers.

3 Indice / Index Main characteristics 2 Economical design 3 Presentation 4 Technical data 5 Design 6 Typical units 7 Busbar compartment 8 Cable compartment 9 Low voltage compartment 10 Circuit-breaker compartment 11 Packaging - Handling - Storage 14 Unpacking and installation of the equipment 15 Operating accessories 18 1

4 Main characteristics Fully metal-clad, type tested according IEC Make-type earthing switch Operation of all switching devices es with front door or closed, one side maitenance ance Complete air insulation of all switchboard live parts IP3X degree of protection on the external erna housing Constructed to withstand the overpressures caused by the internal arc Busbar segregation shutters activated automatically by circuit breaker movement inside the compartment Construction of three high voltage compartments with draw-out circuit breakers Type tested according IEC Designed for high power regional substation switchgears Make-type earthing switch One side maitenance Operation of all switching devices with front door closed Complete air insulation of all switchboard live parts IP41 degree of protection on the external housing Constructed to withstand the overpressures caused by the internal arc up to 50kA/1s Mechanical outside door interlock ensures safe maintenance Technical description Cubicles must be operating under normal conditions in accordance with the IEC60694 standard, but the ambient air temperature could be comprised till - 10 C (critical permissible ambient air temperature - 20 C). Cubicles can be used up to an altitude of 1000 m. Beyond that (altitude up to 3000 m) it's necessary to take into account of a decrease in the dielectric strength (for example: on purpose to install cubicles in 10 kv network, when altitude is 2500 m, it's necessary to specify insulation level for 17,5 kv in an order). In cubicle operation environment must be no dust particles, fumes or smoke, corrosive or flammable gases, vapors or salts. Cubicles have IP4X degree of protection for current up to 1250 A ant IP3X - for current above 1250 A in accordance with the IEC standard. IP41 degree of protection is available by special order. Cubicles are manufactured in accordance with the factory standard _ST :1996 and complies with IEC standard. When commissioning and operating switchgear equipment under normal conditions, the general electrical safety instructions (gloves, insulating stool, etc.), as well as operation handling instructions should be respected. The sequent of disregarding given instruction is the loss of warranty repair. 2

5 Economical design Cubicle structure Low meintenance vacuum circuit-breakers from AREVA, Germany Easy circuit-breaker replacement due to craw-out type circuit-breaker units. The torsionally rigid housing with very high corrosion resistance Separate mechanism for upper and lower shutters. Simple inspection and maintenance, thanks to easy access to the apparatus in the various compartments through doors or easily removable panels and to the possibility of isolating and removing the circuit breaker. Flexibility of engineering is based on a truly modular concept with many product variations, configurations and options. Bolted construction allows for faster replacement and modification in the field. All of these features lead to reduced cost of ownership and risk. Precision fabrication equipment and advanced construction techniques result in high quality, properly aligned modules that support efficent field installation and commisioning, and provide consistent interchangeability of drawout elements with common ratings. Modern bolted construction also greatly reduces the down time and costs associated with system changes and expansions. The torsionally rigid housings of the cubicles are made of mm thickness galvanizedsteel sheets folded at the edges and bolted together. With the selection of high quality materials, special surface treatment and powder painting, the conditions for high impact and corrosion resistance are fulfilled. Special labyrinth construction of panel's side elements and doors ensure personnel safety against arc faults. Switchboards can be fixed to the special foundation, using anchoring bolts above cable ducts. 3

6 Presentation MMC-xx xx-xx cubicles are used in indoor switchgears and distribution centers for 6, 10, 17.5, 24 kv voltage 50/60 Hz frequency electrical power distribution, line overload and short circuit protection. Cubicles are equipped with vacuum circuit breakers of various manufacturers. Cubicle notation: M M C - XX XX - XX / 000x000 Indoor Switchgear Cubicle Rated voltage, kv Vacuum circuit breaker / commutation device: IS - ISM/TEL ("TAVRIDA") EV - Evolis ("Schneider Electric") HD - HD ("ABB") VD - VD4 ("ABB") VE - VEIVACUUM F ("AREVA") HV - HVX ("AREVA") SI - SION ("Siemens") AK - 3AK ("Siemens") LF - LF ("Schneider Electric") GS - load break switch SS - section disconnector IT - voltage transformer SR - service transformer Branch connection diagram number: 11 - outgoing circuit breaker cubicle 12 - section circuit breaker cubicle 13 - incoming circuit breaker cubicle 14 - load break switch cubicle 15 - voltage transformer cubicle 16 - section disconnector cubicle 17 - service transformer cubicle Overall dimensions, cm 4

7 Technical data Rated voltage, kv 12 (17,5) 24 Frequency, Hz 50/60 50/60 Rated branch connection current, А 630;1000;1250;1600; 630;1000;1250;1600; 2000;2500;3150;4000* 2000;2500 Rated main busbar current, А Circuit breaker s making current, ka 16; 20; 25; 31,5; 40; 50 16; 20; 25; 31,5 Rated short-time withstand current (3 s), ka 16; 20; 25; 31,5; 40; 50 16; 20; 25; 31,5 Rated peak withstand current, ka 40; 50; 63; 80; 100; ; 50; 63; 80 Rated low voltage circuit connection voltage, V DC 48; 110; 220 AC 230 Circuit breaker ISM/TEL - ТAVRIDA, VD4 - ABB, Evolis - Schneider Electric, VEIVACUUM F - AREVA, LF - Schneider Electric, HVX - AREVA, VD4/HD - ABB, SION - Siemens VEIVACUUM F - AREVA, HVX - AREVA, SION/3AK - Siemens Insulation level Normal insulation Normal insulation Insulation type Air Air Classification according AFLR (IEC ) AFLR (IEC ) internal arc withstand 40kА/1s 31,5kА/1s Busbar insulation Option Insulated (for 17,5 kv networks - standard) Outgoing line connection By cables (by busbars by special order) By cables Maintenance version Single-sided Single-sided Control versions Local and RTU Local and RTU Height Width 650 (until 1250А; until 12kV); 800; 1000 (2000А and 2500А) 800; 1000 (3150А and 4000А) Depth (1600, if 3AK/50kA circuit breaker is used) * Only with forced ventilation 5

8 Design Design Indoor switchgear consists of different MMC cubicles with commutation devices, control and protection relays, signalling and metering devices and other auxiliary equipment, which are interconnected by electrical diagram. Pic. 1. Incoming circuit breaker cubicle, Outgoing circuit breaker cubicle, Section circuit breaker cubicle, Internal arcing cover for the busbar compartment Internal arcing cover for the cables compartment Fixed points for slinging Busbars Current transformer Surge arresters Earthing switch Cable clamping parts Internal arcing cover for the moving part compartment Access door to the low voltage compartment Circuit breaker Cable connection lugs Access door to the cable compartment Internal arcing channel for directing arc outside the building (obligatory when height of the premises < 3000 mm and Isc > 20kA) Pic. 2. Section disconnector cubicle Internal arcing cover for the busbar compartment Internal arcing cover for the cables compartment Fixed points for slinging Busbars Post insulator Earthing switch Cable clamping parts Internal arcing cover for the moving part compartment Access door to the low voltage compartment Section disconnector Cable connection lugs Access door to the cable compartment Pic. 3. Voltage transformer cubicle Internal arcing cover for the busbar compartment Internal arcing cover for the cables compartment Fixed points for slinging Busbars Post insulator Earthing switch Internal arcing cover for the moving part compartment Access door to the low voltage compartment Voltage transformer Access door to the cable compartment 6

9 Typical units Typical units 2290 SWITCHGEAR CUBICLE TYPES 24 kv 2220 SWITCHGEAR CUBICLE TYPES 12 (17,5) kv Circuit breaker cubicle 800 Circuit breaker cubicle with withdrawable VT truck / Voltage transformer cubicle Voltage transformer cubicle Outgoing circuit breaker cubicle Service transformer cubicle / Sectionalizing cubicle with metering Load break switch cubicle Section disconnector cubicle Load break switch cubicle 7

10 Busbar compartment Busbar compartment The busbar system for currents up to 6000A (12kV) is made of flat copper bars covered with insulating material (for 17,5kV and 24kV). Busbar compartment as well as circuit breaker and cable compartments has an exhaust channel to let out overpressured hot gases in the case of a fault. On request, busbar compartments between two adjacent cubicles can be separated by special cast resin bushings. Busbar connection Pic 1. shows connection of T-shape busbars with outgoing busbars. Pic 2. shows direct connection of busbars. Special mediatory plate (marked with an arrow) In case USN switchgear main busbars are assembled on site (the place of USN switchgear exploitation), it is necessary to ensure reliable contact between busbars. In the table below are given the recommended bolt tightening torques for conductor contacts and steel construction assembly (in case some steel constructions are disassembled and assembled again on site). Bolt tightening torques must be checked by Newton meter torque wrench. The spot-checking must be performed over no less than 3% of all tightened bolts. Nominal moment of bolt tightening torques (Nm) The bolts with hexagonal head The connection of copper busbar and hard alloy aluminium busbar flat contacts The connection of aluminium busbar flat contacts Steel construction assembly M5 M6 M8 M10 M12 M16 The screws with seat for screwdriver M5 M6 7,5 ± 1,0 7,5 ± 1,0-10,5 ± 1,0 10,5 ± 1,0 10,5 ± 1,0 22,0 ± 1,5 22,0 ± 1,5 22,0 ± 1,5 35,0 ± 1,5 30,0 ± 1,5 30,0 ± 2,0 55,0 ± 2,0 40,0 ± 2,0 45,0 ± 4,0 130,0 ± 2,0 60,0 ± 3,0 90,0 ± 5,0 The connections of conductor contacts and steel construction assembly 2,0 ± 0,4 2,5 ± 0,5 8

11 Cable compartment Cable compartment Access to the cable compartment is from the front side. It is very easy to reach cable area, due to the compact design of busbar and circuit breaker compartments. Up to 45% of switchgear panel volume can be used as the cable termination compartment. A connection of 6 parallel cables per phase does not provide any problem, since the horizontal partition between the cable termination compartment and circuit breaker compartment can be removed. USN switchboards are fitted with a fault making earthing switch mounted in the cable compartment, to connect the busbar, incoming or outgoing cables to earth. The earthing switch is controlled from the front of the switchboard by means of manual or motor (on request) operation. Electromechanical interlocks can link switch operation to other switching device in the substation or to lack of voltage in the cable. Connecting up the earthing circuit Switchgear earthing circuit is comprised of series of earthing busbars (2) and copper bars (1) for the connection between cubicles. Copper bars (1) are mounted by means of M8 bolts inside each of cubicle for transportation purposes. Pic. 1. Unbolt the copper bar (1). Pic. 2. Pass it through the opening to the neighboring cubicle. Pic. 3. Bolt the copper bar (2) to the earthing busbars (1) in both cubicles. Fixing the cables Picture shows four M8 bolts welded to tightening flange and designed for the cable earthing braid connection. Tightening flange in the outgoing cubicle with 1 grommet for termination of three core 3x240sqmm copper cable. 9

12 Low voltage compartment Low voltage compartment Low voltage compartment is positioned and manufactured in double steel plate system to have low voltage instruments well protected against the effects of short circuit currents from the primary compartments. The auxiliary circuits of the circuit breaker are automatically connected by means of a specially designed multipole connector, which is operated during circuit breaker sliding-in. PROTECTION AGAINST INTERNAL ARC MMC Melcos" switchboards are designed in compliance with the prescription of the IEC Standard and ensure maximum personnel safety even under internal arc conditions. In fact, the switchboards are constructed to withstand the overpressures caused by the internal arc and are fitted with ducts to guide the exhaust gases so that there is no damage to operators or to the rooms. On request, the MMC Melcos" switchboards are fitted with an optical arc protection system with sensors in the various compartments. The low voltage circuit connection between the cubicles Access the terminal block [1] by the door to low voltage compartment. Connect up the links between the cubicles by passing through the side openings [2] on the cubicle. Passage of the LV cables in the cable compartment Low voltage circuit connection cables are passed in the cable compartment and the cable duct through the prepared passage in the left side of cubicle (through moving part compartment and cable compartment). Passages of the LV cables are covered with metal covers. LV cable duct can be accessed from the 198x55 mm cut-out space for the passage of LV cables in the bottom of the cubicle. 10

13 Circuit-breaker compartment Circuit breaker compartment Standardized construction of draw-out element allows integration of SF6 gas or vacuum circuit breakers from major worldwide suppliers. SION / 3AK VD4 / HD4 EVOLIS / LF HVX ISM/TEL Siemens ABB Schneider Electric Areva Tavrida Electric Control units of cubicle with ISM/TEL 12-XX/XXX-81 circuit breaker Circuit breaker ISM/TEL 12-XX/XXX-81 is mounted on draw out element. 1 Circuit breaker status indication 2 Draw out element status indication 3 Earthing switch status indication 4 Circuit breaker s switch off button 5 Circuit breaker s switch on button 6 Low voltage compartment s lighting switch 7 Voltmeter switch 8 Window for draw out element (circuit breaker) position inspection 9 Circuit breaker s mechanical switch off mechanism 11

14 Circuit-breaker compartment Operating peculiarities of cubicle with ISM/TEL XX-XX/XXX-114 circuit breaker Circuit breaker ISM/TEL XX-XX/XXX-114 is mounted on draw out element. Control units of cubicle with ISM/TEL XX-XX/XXX-114 circuit breaker are situated as in cubicle with ISM/TEL 12-XX/XXX-81 circuit breaker, except for the circuit breaker s mechanical switch on/off mechanism. Turn the handle (10) in the anticlockwise direction till firm resistance to switch off interlocking of circuit breaker s mechanical switch on/off mechanism. 10 Interlocking of circuit breaker s mechanical switch on/off mechanism ATTENTION! Turn the handle (10) in the anticlockwise direction till firm resistance before putting circuit breaker ISM/TEL XX-XX/XXX-114 from operation into isolated position. Operating peculiarities of cubicle with EVOLIS circuit breaker Control units of cubicle with EVOLIS circuit breaker are situated as in cubicles with ISM/TEL circuit breakers, except for the circuit breaker s mechanical switch on/off mechanism. Circuit breaker s mechanical switch on/off mechanism consists of drive-bushings (2 and 3) and interlocking fastener (1). Circuit breaker s mechanical switching on/off operations requires handle (4). To switch on/off circuit breaker lift up interlocking fastener and keeping it in this position insert handle to particular drivebushing and turn the handle. 1 Interlocking fastener 2 Drive-bushing for switching on circuit breaker 3 Drive-bushing for switching off circuit breaker 4 Circuit breaker s mechanical switch on/off handle 12

15 Circuit-breaker compartment Operating peculiarities of cubicle with SION circuit breaker Control units of cubicle with SION circuit breaker are situated as in cubicles with ISM/TEL circuit breakers, except for the circuit breaker s mechanical switch on/off mechanism. Circuit breaker s mechanical switch on/off mechanism consists of drive-bushings (1 and 2) and interlocking fastener (3). Circuit breaker s mechanical switching on/off operations requires handle (4). To switch on/off circuit breaker lift up interlocking fastener and keeping it in this position insert handle to particular drive-bushing and turn the handle. 1 Drive-bushing for switching off circuit breaker 2 Drive-bushing for switching on circuit breaker 3 Interlocking fastener 4 Circuit breaker s mechanical switch on/off handle Operating peculiarities of cubicle with VD4 circuit breaker Control units of cubicle with VD4 circuit breaker are situated as in cubicles with ISM/TEL circuit breakers, except for the circuit breaker s mechanical switch on/off mechanism. Circuit breaker s mechanical switch on/off mechanism consists of drive-bushings (2 and 3) and interlocking fastener (1). Circuit breaker s mechanical switching on/off operations requires handle (4). To switch on/off circuit breaker lift up interlocking fastener and keeping it in this position insert handle to particular drivebushing and turn the handle. 1 Interlocking fastener 2 Drive-bushing for switching off circuit breaker 3 Drive-bushing for switching on circuit breaker 4 Circuit breaker s mechanical switch on/off handle 13

16 Packaging - Handling - Storage Packaging The conditions and methods of transport are defined with the customer, at the time of processing the contract. Each cubicle is delivered vertically, in separate packaging. State of the equipment before packaging: vacuum circuit breaker, voltage transformer and section disconnector are in test position (if they would not be transported separately); earthing switch closed. The packaging of cubicles for overland transport (if there are no special requirements in contract): enveloped in plastic stretch wrapping (thickness > 100μ), belted with sticky tape. The packaging of cubicles for air and sea transport: enveloped in plastic stretch wrapping (thickness > 100μ), packed in wooden crates. Additional equipment and spare parts packed separately or together in one package at discretion of manufacturer. Handling of cubicle and moving part It is imperative that the forks of the truck are fully engaged throughout the entire width of the wooden crate. The weights of the crates are indicated on their sides. In order to lift or deposit crate use a jib crane. Fix slings only to the indicated points. Never tip the crates over. Never handle the circuit breaker by its connecting plates. Never lift circuit breaker by lifting it under its chassis or under its trolley. Storage Cubicles must be warehoused in premises. In the storage area must be no dust particles, fumes or smoke, corrosive or flammable gases, vapors or salts. 14

17 Unpacking and installation of the equipment Type of Building Structural Work The installation of a switchboard requires a sufficiently flat and even concrete structure. The dressing of a top coat finish of cement with a straight edge should eliminate any surface irregularities and declivities of greater than 2mm per meter. The overall flatness of the support surface should not show up any deflection greater than 5 mm. Floor, ceiling and walls of the building must be finished with materials, which not raise or collect dust Unpacking cubicles Unpacking c ubicles should only take place on the installation site. Remove sticky tape and plastic stretch wrapping from cubicle (the easiest way to do it by lifting cubicle mm from floor see Handling cubicles ). Visually inspect the exterior of cubicle. Handling cubicles Four slinging points are provided for on the roof of each cubicle. Lift the cubicle unit by 4 slings each one capable of supporting 1,000 kg. Slide the cubicle along, using three cylindrical rollers of 30mm min. diam. Thus moving it to its final installation point. Handling the moving part for placing it on the ground Fix protected steel cables only to the indicated fixing points. On the ground, prepare 2 stringers that will be aligned with the outer edges of the truck. 15

18 Unpacking and installation of the equipment Installation on the ground Cubicles must be positioned on installation site in accordance with certified project and electrical diagram. In the floor of the cubicle installation place over cable compartment of cubicle must be duct or opening for cable passing. The cubicle is fixed to the ground with 2 anchor bolts M12x110. It is recommended to drill the 13mm diameter holes for the anchor bolts (see the picture). Installation of a back-to-wall switchboard (top view) 16

19 Unpacking and installation of the equipment Positioning cubicles in switchgear Cubicles must be positioned in the order of priority in accordance with the single-line diagram. For a switchboard composed of 1 to 10 cubicles, it is recommended to begin installation from the first to the last cubicle on the side opposite the access to the premises. For a switchboard with more than 10 units, begin the installation of the equipment by the middle of the switchboard. Connecting cubicles Check the perpendicularity of each of them in relation to the ground. Align up the front facing panels. Proceed with the layout of the other cubicles by repeating the same checks each time. Cubicles interconnected by M8 bolts in 6 fixing points (in accordance with the diagram). 1,3,4,5 fixing points are compulsory and 2,6 optional (by own discretion according to situation). 1,3,4,5 compulsory fixing points 2,6 optional fixing points Unscrew 6 screws to access the fixing point No. 4. Opening the door of the cubicle Get the keys from the accessories pack. Insert the key into the keyhole. Turn it in an anti-clock wise direction to unlock the door. Turn the handle upwards to open the door. Open the door. Extraction of draw out element with moving part (circuit breaker, section disconnector, voltage transformer) described in 20 page. 17

20 Operating accessories Equipment handling table for the moving part Operating handles and keys Locking and unlocking key for the door of the LV compartment. Locking and unlocking key for the door of the moving part compartment. Disengageable crank handle for the circuit breaker s moving part. The handle for earthing switch control. 18

21 Notes

22 Notes

23 M.EL.COS. si riserva il diritto di modificare i prodotti presenti in questo catalogo in qualsiasi momento e senza alcun preavviso. M.EL.COS. has the right to modify the products in this catalogue at any time and without any notice

24 DIREZIONE FIRENZE Autostrada Del Sole Direzione AREZZO PIEVE AL TOPPO M.EL.COS S.n.c. Sede Legale, Amministrativa e Produzione Headquarter and Production Via Leopoldo di Toscana 9/11 TEGOLETO Via Aretina Grosseto-Fano Alberoro (AR) -ITALY- T F P.IVA ALBERORO Direzione Commerciale Sales Direction Via Indipendenza 65/b Meda (MB) -ITALY- T F info@melcos.it Via Aretina Grosseto-Fano SAN LUCIANO BORGHETTO -LE NEBBIAIE MONTAGNANO MONTE SAN SAVINO Autostrada Del Sole DIREZIONE ROMA Via Leopoldo di Toscana 9/ Alberoro (AR) DIREZIONE FOIANO