MEDIUM VOLTAGE SWITCHGEAR CATALOGUE. Code: P2490_xx

Transcription

1 MEDIUM VOLTAGE SWITCHGEAR for secondary distribution CATALOGUE Code: P2490_xx

2 CONTENTS 1 About us 2 Medium Voltage Business Unit Portfolio 3 Overview 8 Medium Voltage Switchgear Types. Equipment used. 13 Technical features 14 Switchgear description 21 Switchgear Designs 25 Safety and user protection 26 Packaging 27 Storage, unpacking, assembly and installation 32 Benefits of P2490_xx Switchgear Range 32 Services provided for the product range

3 About us Electroalfa is one of the Romanian market leaders on the fields of electrical equipment manufacturing, stell fabricated parts and EPC contracting, withe more than 23 years of experience. Electroalfa today: Our products and services portfolio includes the following: 3 factories in Botosani Low and Medium Voltage Products Production facilities and sales representatives in Romania New R&D Center A turnover around 35.5 million euro in 2013 Steel Fabricated Parts Turnkey Projects Renewable Energy Production A strong brand, based on high experience, qualifications and enthusiasm of 380 professionals For developing the most reliable products and being connected to the latest technologies, we implemented and keep up to date an integrated quality management system audited and certified by SRAC CERT. Quality Management Systems Certification SR EN ISO 9001:2008 Environmental Management Systems Certification SR EN ISO 14001:2005 Occupational Health and Safety Management Systems Certification OHSAS 18001:2007 About us 1

4 Medium Voltage Products Electroalfa holds a portfolio of primary, secondary distribution switchgear and transformer substations, product of highly complexity and high added value. All these are the result of two decades of research and development in its own departments as confirmed by independent laboratories. The high functionality and the level of safety for the equipment during service are attributes that have positioned on top our medium voltage products by major customers in the market. Both the primary distribution and the secondary distribution switchgear are the products manufactured under own Electroalfa solutions. These can encompass a wide range of equipment and are tested in independent laboratories to ensure reliability and durability. 2 Medium Voltage Business Unit Portfolio

5 Overview 24KV/ 630A/ 20KA Medium Voltage Switchgear of P24xx range, manufactured by Electroalfa, are tested switchgear, built to be used in secondary distribution systems for medium voltage as follows Rated Voltage up to 24 kv, Rated Current up to 630 A Max. Short time Current up to 20 ka. Applications LV/MV transformer substations, compact transformer substations or transformer substations in erected buildings, Power Supply for buildings such as residential areas, hospitals, office buildings, stadia, airports, supermarkets, industrial facilities, etc. Junction points. Photovoltaic and Wind Power Plants. Overview 3

6 The P2490_xx range includes switchgear for all the LV/MV substations and for industrial secondary distribution functions. P2490_1 P2490_2 line switchgear with SF6-Insulated Load Break Switch Disconnector transformer switchgear with SF6-Insulated Load Break Switch Disconnector and HRC fuses P2490_3 P2490_4 P2490_5 metering switchgear with SF6-Insulated Load Break Switch Disconnector, voltage metering transformers, HRC fuse protected coupling switchgear with SF6-Insulated Load Break Switch Disconnector busbar connection switchgear P2490_6 P2490_7 P2490_8 connection switchgear for connecting the power cable directly to the main busbar metering switchgear with current and voltage metering transformers switchgear with SF6-Insulated Load Break Switch Disconnector, vacuum Circuit Breaker and microprocessor protection block P2490_9 P2490_10 The P2490_xx range switchgear are for indoor use, metal clad, with simple extensible busbar system. IST internal services transformer switchgear, SF6-Insulated Load Break Switch Disconnector powered, HRC fuse protected metering switchgear with SF6-Insulated Load Break Switch Disconnector, current metering transformers, and voltage metering transformers 4 Overview

7 Standards The switchgear panels are designed and tested in accordance with the following European standards: SR EN :2004 High-voltage switchgear and controlgear AC metal-enclosed switchgear. Part 200: AC metalenclosed switchgear for rated voltages above 1kV and up to and including 52kV. SR EN :2009 High-voltage Switchgear And Controlgear - Part 1: Common Specifications. SR EN :2007 High-voltage switchgear and controlgear Part 102: Alternating current disconnectors and earthing switches. Quality Control System During all the phases of implementation of all its products, and hence the medium voltage switchgear panel as well, starting from the design, procurement assessment, supply, manufacture, flows and final tests and checks Electroalfa has implemented and maintains a system of Integrated Management System that meets the reference standards of SR EN ISO9001:2008, SR EN ISO14001:2005, OHSAS 18001:2007, ISO / IEC 27001:2005 and SA 8000:2008, system evaluated and certified by the awarding bodies SRAC CERT Bucharest and IQNet. This provides our customers the guarantee of suitable products with a high and constant quality level. Overview 5

8 Type Tests The Switchgear were type tested with fully satisfactory results at ICMET Craiova Laboratories. 6 Overview

9 Climate and ambient conditions Location Climate Group Maximum environment temperature, during use Maximum average temperature for 24 hours, during use Minimum environment temperature, during use Temperature during transport and storage indoors WDr/CT (moderate: warm dry/ cold /temperate) +40 C +35 C -5 C -25 C +70 C Humidity during use Daily average value maximum 95% Monthly average value maximum 90% The average daily atmospheric vapor pressure The average monthly atmospheric vapor pressure Maximum altitude maximum 2,2kPa maximum 1,8kPa m The environment must be free of dust, no corrosive or flammable gases, vapors or salt beyond established by current regulations for indoors electrical installations. For different values to the above consult the manufacturer. Overview 7

10 Medium Voltage Switchgear Types: Equipment used. P2490_1 Line switchgear with SF6-Insulated Load Break Switch Disconnector Basic Equipment SF6 Load Break Switch Disconnector with three positions : on/ off/ earthing; Type K operating mechanism Voltage presence indicator SF6 pressure indicator Three-phase main busbar system Cables connection terminals Mechanical interlocks Heating resistance Optional On/ Off Disconnector Actuator Auxiliary contacts for switch disconnector and earthing connection Auxiliary contacts for Voltage presence indicator Fault Indicator Phases sequence checking device Enlarged LV compartment Front and side protective covers Cable terminal ends P2490_2 Transformer switchgear with SF6- Insulated Load Break Switch Disconnector and HRC fuses Basic Equipment SF6 Load Break Switch Disconnector with three positions : on/ off/ earthing; Type A operating mechanism HRC fuses socket Earthing Circuit below and above the fuses Voltage presence indicator SF6 pressure indicator Three-phase main busbar system Cables connection terminals Mechanical interlocks Heating resistance Optional On/ Off Disconnector Actuator Opening coil for the disconnector Auxiliary contacts for switch disconnector and earthing connection Auxiliary contacts for Voltage presence indicator MV Fuses Enlarged LV compartment Front and side protective covers Cable terminal ends 8 Medium Voltage Switchgear Types. Equipment used.

11 P2490_3 Metering switchgear with SF6- Insulated Load Break Switch Disconnector, voltage metering transformers, HRC fuse protected Basic Equipment SF6 Load Break Switch Disconnector with three positions : on/ off/ earthing; Type A operating mechanism HRC fuses socket Earthing Circuit below and above the fuses SF6 pressure indicator Voltage metering transformers Three-phase main busbar system Mechanical interlocks Heating resistance Optional On/ Off Disconnector Actuator Opening coil for the disconnector Auxiliary contacts for switch disconnector and earthing connection P2490_4 Coupling switchgear with SF6- Insulated Load Break Switch Disconnector Basic Equipment SF6 Load Break Switch Disconnector with three positions : on/ off/ earthing; Type K operating mechanism Voltage presence indicator SF6 pressure indicator Three-phase main busbar system incoming/ outgoing, left/ right Mechanical interlocks Heating resistance Optional On/ Off Disconnector Actuator Auxiliary contacts for switch disconnector and earthing connection Auxiliary contacts for Voltage presence indicator Phases sequence checking device Enlarged LV compartment Front protective covers Voltmeters Voltage presence indicator Auxiliary contacts for Voltage presence indicator MV Fuses Enlarged LV compartment Front and side protective covers Medium Voltage Switchgear Types. Equipment used. 9

12 P2490_5 Busbar connection switchgear Basic Equipment Three-phase main busbar system incoming/ outgoing, left/ right Optional Voltage presence indicator Auxiliary contacts for Voltage presence indicator Phases sequence checking device Heating resistance Front protective covers P2490_6 Connection switchgear for connecting the power cable directly to the main busbar Basic Equipment Three-phase main busbar system Voltage presence indicator Heating resistance Cables connection terminals Optional Auxiliary contacts for Voltage presence indicator Fault Indicator Phases sequence checking device Enlarged LV compartment Front and side protective covers Cable terminal ends 10 Medium Voltage Switchgear Types. Equipment used.

13 P2490_7 Metering switchgear with current and voltage metering transformers Basic Equipment Current metering transformers Voltage metering transformers complete with HRC fuses Three-phase main busbar system Heating resistance Optional Voltage presence indicator Auxiliary contacts for Voltage presence indicator Voltmeters Phases sequence checking device Enlarged LV compartment Front protective covers P2490_8 Switchgear with SF6-Insulated Load Break Switch Disconnector and vacuum Circuit Breaker Basic Equipment SF6 Load Break Switch Disconnector with three positions : on/ off/ earthing. Disconnector operation mechanism (Type A) SF6 pressure indicator for the switch disconnector Vacuum Circuit Breaker Circuit Breaker operation mechanism Three-phase main busbar system Cables connection terminals Earthing Circuit on Cable terminals Voltage presence indicator Mechanical interlocks Heating resistance Optional On/ Off Disconnector Actuator Circuit Breaker On/ Off switching motor Auxiliary contacts for switch disconnector, circuit breaker and earthing circuit Auxiliary contacts for Voltage presence indicator Current metering transformers Digital protection relay Phases sequence checking device Enlarged LV compartment Front and side protective covers Cable terminal ends Medium Voltage Switchgear Types. Equipment used. 11

14 P2490_9 IST internal services transformer switchgear, SF6-Insulated Load Break Switch Disconnector powered, HRC fuse protected Basic Equipment SF6 Load Break Switch Disconnector with three positions : on/ off/ earthing; Type A operating mechanism HRC fuses socket Earthing Circuit below and above the fuses SF6 pressure indicator Internal services transformer Three-phase main busbar system Mechanical interlocks Heating resistance Optional On/ Off Disconnector Actuator Opening coil for the disconnector Auxiliary contacts for switch disconnector and earthing connection Voltmeters Voltage presence indicator Auxiliary contacts for Voltage presence indicator P2490_10 Metering switchgear with SF6- Insulated Load Break Switch Disconnector, current metering transformers, and voltage metering transformers Basic Equipment SF6 Load Break Switch Disconnector with three positions : on/ off/ earthing; Type K operating mechanism and SF6 pressure indicator Current metering transformers Voltage metering transformers complete with HRC fusees Three-phase main busbar system Heating resistance Optional On/ Off Disconnector Actuator Auxiliary contacts for switch disconnector and earthing connection Voltage presence indicator Auxiliary contacts for Voltage presence indicator; Voltmeters Phases sequence checking device Enlarged LV compartment Front protective covers MV Fuses Enlarged LV compartment Front and side protective covers 12 Medium Voltage Switchgear Types. Equipment used.

15 Technical Features Nr. Feature U.M. Value 1 Rated voltage Ur kv 24 2 Lightning impulse withstand rated voltage (phase to earth, phase to phase) Up 3 Lightning impulse withstand rated voltage (across isolating distance) Up 4 Industrial frequency withstand rated voltage, 50 Hz Ud 5 Industrial frequency withstand rated voltage for the separation distance, 50 Hz Ud kv 125 kv 145 kv 50 kv 60 6 Rated current Ir Main busbars A 630 Switch disconnector A Breaking current I1 A Rated admissible short-time current- Ik KAef/1 s 20 9 Rated admissible peak current- Ip kamax Rated frequency Hz Arc resistance, front and side (switchgear equipped with protective frontal covers or enlarged LV compartment and protective upper side covers) 12 Overall Dimensions KA/sec IAC AFL 16KA/1 s Width mm (according to the design) Depth mm 985 Height mm (without secondary circuits panel) (with secondary circuits panel) 13 Protection degree: In operating position, with all doors and panels closed IP 3X Between adjacent interior compartments IP Main circuits busbar insulation Shrinkable tube, terminals and air protection Technical features 13

16 Switchgear description The panels are designed to be used in the in secondary distribution to supply electricity, from the client s medium voltage network, directly from the National Energy System (NES) for transformer substations or distribution in industrial units, by power stations located in the main usage points The panels are modular and metal enclosed, with compartments and fitted with fixed equipment. The equipment type allows a compact design with small dimensions. The medium voltage switchgear panels consist of a metal housing made of sheet metal panels assembled with special rivets, fasteners and point welding,, which accommodate the medium voltage equipment according to the operation requirements and the metering, command, signalling and protection low voltage equipment The removable panels or the ones which provide access to live parts of the switchgear are provided with warning signs: Warning! High Voltage! Electrocution Hazard!. 14 Switchgear description

17 The switchgear enclosures are provided with the following compartments: The all-purpose Busbar Compartment This section is the GSC-24 indoor switch disconnector itself, sealed inside the insulating resin housing. The enclosure material provides good insulation features and resistance to moisture and atmospheric contaminants. The insulating housing consists of upper shell and lower shell, tightly closed and the interior is filled with SF6 gas at a pressure of 0.4 bar minimum. The GSC-24 indoors medium voltage switch disconnector can be set in one of the following positions: closed, open, earthed. to the earthing busbar by means of a special provided screw. Secondary Circuits and Operation Mechanism The all-purpose busbar compartment is located at the top, at the rear and includes the all-purpose busbar placed on the load switch disconnector terminals with insulating shrink tube and silicone insulation in areas of contact with the upper terminals of the disconnector. It is separated from the secondary circuit compartment by a metal panel and from the by the cable connection lower compartment through the disconnector s housing. Access within this section is not allowed in normal operation of other substation panels. The Load Break Switch Disconnector Compartment Connection Compartment The connection compartment is situated at the lower side of the enclosure and may include, depending on panel type: the lower terminals of the switch disconnector, the capacitive voltage dividers and the cable terminals. For the fused switch disconnector panels, the fuses are situated in this compartment alongside the earthing disconnector below the HRC fuses.. The compartment is metal enclosed fixed with special rivets and screws. Access to this section shall be realised only if the earthing disconnector is closed by opening the compartment s door. The medium voltage connections are done via single phase conductors enabling the cable terminal. For shielded cables is possible to link the shielding wire The Secondary circuit compartment is located in the front top part of the panel and is accessible in normal operation of the station. For secondary circuits of low complexity, they are partially located in the mechanism s sector, but also in two adjacent sectors, each protected by metal or plastic plates, easily accessible and that can be opened with a tool. For secondary circuits of higher complexity the enclosure can be provided with an additional circuit panel fitted above the enclosure, in line with the front panel. The additional secondary circuits panel is provided with side access door, that can be handled by hand, which closes with key and lock. The devices placed in the secondary circuits panel are accessible after opening the door. The switchgear block diagram is placed on the door of the joint mechanism and secondary circuits compartment.. Switchgear description 15

18 Load Break Switch Disconnector GSC-24 with Type K mechanism GSC-24 with Type A mechanism GSC-24 is an indoors SF6 disconnector for 24kV rated voltage, using SF6 for arc extinguishing medium as well as for electrical insulation. GSC-24 is characterized by a small size, convenient to install and operate, and which allows good adaptation to the requirements of integration into existing installations. The GSC-24 load break switch disconnector has the function of control and protection of the electrical equipment in power networks and transformer substations. GSC-24 is manufactured in accordance with the following standards: IEC , IEC , IEC , IEC and GB The switch disconnector is provided in two variants: with Type K mechanism designed to equip line switchgear panels; with Type A mechanism that equip the switch disconnector and fuses combination, designed to protect and control LV/ MV transformers power supply in transformer substations Each of the two types of mechanisms can be provided, according to the customer s request, manually operated or motorized and manually operated. The shape and dimensions of GSC-24 switch disconnector Legend: A. lower terminal, M10x22, maximum torque 35Nm; C. hexagon 24, for the main lower side connection; D. main upper side connection; E. contact surface for the upper terminal; F. upper terminal, M8x30, maximum torque 28Nm; G. disconnector terminal, with earthing role; M8x20 bolts, for fixing the earthing bar. 16 Switchgear description

19 Switch Disconnector Main Circuit Arc extinction C. Earthing circuit operation (EC) The main circuit of GSC-24 indoors switch disconnector is sealed inside the resin enclosure. The enclosure material provides good insulation features and resistance to moisture and atmospheric contaminants. The insulating housing consists of upper shell and lower shell, tightly closed and the interior is filled with SF6 gas at a pressure of 0.4 bar. A safety valve is provided at the bottom rear of the casing. This is a protection measure to a fault situation, where the high pressure, internal gas can come out through the safety valve without affecting the operator or the switchgear. The GSC-24 switch disconnector can be configured as per below: Closed Open The GSC-24 load break switch uses SF6 gas as arc extinguisher. Whilst in on or off position, the electric arc will spin through the action of a magnetic field given by a permanent magnet. Subsequently the arc will be cooled and extinguished by SF6 gas. Operating mechanism and interlocking functions There are two types of mechanisms used for GSC-24: The type K, spring operated mechanism, is used together with the GSC-24 load switch, for line switchgear. The type A, spring operated mechanism, is used for the GSC-24 load switch combined with fuses, for transformer panels. 1. The type K spring operated mechanism The operating principle of type K spring operated mechanism is based on the compression and release of the main spring of the mechanism (see Figure 1, Open Position). A. Closing the main circuit Closing the EC can be done only by manual operation, inserting the handle in entry 1 (Figure 1), rotating clockwise, the upper cam rotates, compresses the spring, which accumulates energy. Upon reaching maximum compression, the continued rotation of the crank activates the mechanism that releases the energy of the main spring and so connecting the mobile contact on Earthed position of the main circuit. Opening the EC can be done only by manual operation, inserting the handle in entry 1 (Figure 1), rotating counter clockwise, as per the label affixed to the front cover of the switch disconnector. The type K operating mechanisms can be motorized, upon request, for opening/ closing the main circuit switch disconnector. These commands can be done remotely or via buttons placed on the front of the enclosure. Earthed Through operating the handle, entry 2 (Figure 1), clockwise, the lower cam rotates, compresses the spring, which accumulates energy. Upon reaching maximum compression, the continued rotation of the crank activates the energy of the main spring and so connecting the mobile contact on Closed position of the main circuit. GSC-24 load switch operation diagram. B. Opening the main circuit Through operating the handle, entry 2 (Figure 1), counter clockwise, the energy accumulated in the main spring is released and the disconnector switches the main circuit to Open Switchgear description 17

20 Figure 1. Type K mechanism. Legend: A. Cable compartment lower door interlocking; B. Mounting points for voltage presence indicator; 1. Entry for crank operation of the EC; 2. Entry for crank operation of the switch disconnector; 3. Multifunctional plate; 4. Front plate; 5. Rear plate. Figure 2. Type K mechanism, motorized. 18 Switchgear description

21 2. The type A spring operated mechanism The operating principle of type A spring operated mechanism resembles the type K mechanism, adding the tripping function after tripping by the fuse (striker pin tripping). For the type A operating mechanism, electromagnetic tripping is also available, upon customer s request. The dimensions and the elements listed for Type K are valid for Type A, except those marked in Figure 3. C. Earthing circuit operation (EC) The EC operation for the Type A mechanism is similar to the one for Type K mechanism. The type A operating mechanisms can be motorized, upon request, for opening/ closing the main circuit switch disconnector. These commands can be done remotely or via buttons placed on the front of the enclosure. Warning! For both mechanisms types K or A, only when the switch disconnector is open. one, and only one, of the following operations can be performed: 1. Closing the switch disconnector, manually or electrical, or 2. Closing the cable terminals earthing circuit, manually. A. Closing the main circuit Through operating the handle, clockwise, the lower lever 1 rotates, compresses the closing spring 12, and the opening spring 8, simultaneously in order to provide the required energy for the closing operation. When the lower lever 1 activates the tripping pin and the lower sliding wheel and releases the closing spring causing the closing of the main circuit.. Figure 3. Type A mechanism B. Opening the main circuit To open the main circuit press the opening red push-button. Alternatively the fuses tripping pin or the opening electromagnet can activate the tripping pin 2. These operations cause the release of the appropriate spring and the opening of the main circuit by the load switch disconnector.. Figure 4. Type A mechanism, motorized Switchgear description 19

22 Operating Mechanism Interlockings Figure 4. Interlocking mechanisms diagram. The SF6 insulated GSC-24 type, indoors medium voltage switch disconnectors, including the fused variant are provided with following interlockings: A. When the switch disconnector is closed the earthing circuit cannot be activated B. When the earthing circuit is closed, the switch disconnector in open position for the main circuit cannot be operated. C. Padlock provision for blocking the main circuit and/ or the earthing circuit, to prevent forcing the mechanism. D. The interlocking between the position of the switch disconnector and the lower compartment, the cables compartment: the cables compartment cover can be removed only if the disconnector is set to earthed position. Decoupling the disconnector from the earthed position and switching it to the open position, can be done only if it is installed correctly, with the cables lower compartment cover in the normal operating position. Legend: X. Earthing Circuit open (front cover installed); Y. Earthing Circuit closed (font cover installed); The difference between X and Y: 15 mm. A. Interlocking system. Objective: providing access to the medium voltage cables compartment only when the cable terminals are earthed. 20 Switchgear description

23 Switchgear Designs. Dimensions. P2490_1 Line switchgear with SF6-Insulated Load Break Switch Disconnector Overall Dimensions Width: 500 mm Depth: 985 mm Height: mm Maximum Height with Enlarged LV compartment: mm Cable terminal height: 900 mm Weight: 195 Kg P2490_2 Transformer switchgear with SF6-Insulated Load Break Switch Disconnector and HRC fuses Overall Dimensions Width: 500 mm Depth: 985 mm Height: mm Maximum Height with Enlarged LV compartment: mm Cable terminal height: 400 mm Weight: 210 Kg P2490_3 Metering switchgear with SF6-Insulated Load Break Switch Disconnector, voltage metering transformers, HRC fuse protected Overall Dimensions Width: 600 mm Depth: 985 mm Height: mm Maximum Height with Enlarged LV compartment: mm Weight: approximative 300 Kg (depending on the type of metering transformers) Switchgear Designs. Dimensions. 21

24 P2490_4 Coupling switchgear with SF6-Insulated Load Break Switch Disconnector Overall Dimensions Width: 500 mm Depth: 985 mm Height: mm Maximum Height with Enlarged LV compartment: mm Weight: 200 Kg P2490_5 Busbar connection switchgear Overall Dimensions Width: 500 mm Depth: 985 mm Height: mm Maximum Height with Enlarged LV compartment: mm Weight: 125 Kg P2490_6 Connection switchgear for connecting the power cable directly to the main busbar Overall Dimensions Width: 500 mm Depth: 985 mm Height: mm Maximum Height with Enlarged LV compartment: mm Cable terminal height: 800 mm Weight: 120 Kg 22 Switchgear Designs. Dimensions.

25 P2490_7 Metering switchgear with current and voltage metering transformers Overall Dimensions Width: 700 mm Depth: 985 mm Height: mm Maximum Height with Enlarged LV compartment: mm Weight: approximative 350 Kg (depending on the type of metering transformers) P2490_8 Switchgear with SF6-Insulated Load Break Switch Disconnector and vacuum Circuit Breaker Overall Dimensions Width: 800 mm Depth: mm Height: mm Maximum Height with Enlarged LV compartment: mm Cable terminal height: 400 mm Weight: approximative 450 Kg (depending on the type of metering transformers) P2490_9 IST internal services transformer switchgear, SF6-Insulated Load Break Switch Disconnector powered, HRC fuse protected Overall Dimensions Width: 750 mm Depth: 985 mm Height: mm Maximum Height with Enlarged LV compartment: mm Weight: approximative 350 Kg (depending on the internal services transformer type) Switchgear Designs. Dimensions. 23

26 P2490_10 Metering switchgear with SF6-Insulated Load Break Switch Disconnector, current metering transformers, and voltage metering transformers Overall Dimensions Width: maximum mm (depending on the type of metering transformers) Depth: 985 mm Height: mm Maximum height with Enlarged LV compartment: mm Weight: approximative 420 kg (depending on the type of metering transformers) 24 Switchgear Designs. Dimensions.

27 Safety and user protection The Switchgear are environmentally friendly and do not pose a risk the life, health and safety of operating personnel. This is achieved by the fact that the products have been designed, built and tested to protect the operating personnel against: electric shock by enclosing the electrical equipment in housing with protection class IP 3X, use of protection barriers (screens) and linking to all conducting inactive parts (not live) to the protection circuit; improper manoeuvres by Mechanical interlocks and by appropriate labelling indicating correct operation and warnings. It is recommended to follow the directions on the labels and in the operating instructions and not try forcing the mechanisms via other maneuvers. After each manual maneuver remove the operation crank from the entry. Store the crank on a special support near the enclosures. Operating mechanical interlocks The equipment is provided with a padlock provision to prevent forcing the mechanism upon actuating the earthing circuit and the main disconnector. 1 2 internal arc The switchgear panels were tested in ICMET Craiova laboratories on front and side free arc resistance. The panels provide internal arc protection to EN , and are classified IAC: AFL 16 KA 0.5s; overloads and short circuits via appropriate sizing of the electric circuits and the usage of HRC fuses or of protection blocks; fire hazard by using fire and heat resistant materials and by avoiding the risk of occurrence of sources generating heat; mechanical hazard by the absence of sharp tips and edges, of moving parts that can cause injury, by providing mechanical rigidity and sufficient stability of the product; The switchgear are equipped with mechanical interlocks designed to prevent misuse. Familiarity with these interlocking is essential before performing any manoeuvre with medium voltage switchgear. The available interlocks are: A. For the Switchgear The lower cover of the cables connection compartment can be only opened whilst the medium voltage cables earthing disconnector is closed. B. For the Switch Disconnectors The SF6 insulated GSC-24 type, indoors medium voltage switch disconnectors, including the fused combination, are provided with the following interlockings: When the switch disconnector is closed the earthing circuit cannot be activated.. 1. Ureche pentru blocarea cu lacăt a acţionării CLP. 2. Ureche pentru blocarea cu lacăt a acţionării separatorului principal. When the earthing circuit is closed, the switch disconnector in open position for the main circuit cannot be operated. Padlock provision Safety and user protection 25

28 Installation The indoor medium voltage switchgear are placed on wooden racks and packaged for land transportation in shrink wrapped polyethylene foil, provided with anticondensation slots (for road or rail freight). For sea, air shipping or upon customer s request the switchgear can be delivered wooden crated, lined with corrugated cardboard or polystyrene. The accessories, accompanying documents and equipment likely to be destroyed during transport are packed separately. When the switchgear are part of complex equipment, such as a compact transformer substation or a junction point, the enclosures can be delivered fully installed in the assembly, unless otherwise agreed with the client. Transport Delivery Equipment settings: a. Switch Disconnectors in Open position; b. The blades of the earthing switch must be in the Closed position; c. Accessories and secondary circuits devices likely to be damaged in transport are delivered separately, packed and kept in the original packaging; d. The HRC fuses are delivered in their original packaging.. Reception Upon delivery the switchgear are to be checked. In case of irregularities notify the carrier and forward these observations to the manufacturer. The complaints about the delivery are acceptable by the manufacturer within 3 days of receipt, provided that the carrier has been notified as well. Handling The switchgear must be kept in their original packaging up to the place of installation. The handling of the medium voltage switchgear, regardless of the packaging method, is done as follows: using the forklift truck or the hand pallet truck the forks must cover the whole panel depth; using the lifting rings, ordered with the units and using cables with up to 60 opening. Do not tilt the functional units more than 15 to the vertical. The panels can be moved by road, rail, air or sea, closed, in normal operational position, packaged and secured to avoid any mechanical damage. If the transport is made on rough roads the maximum speed must be 30km/h. The transport terms and conditions are agreed with the client prior to signing the contract. The packaging requirements depend on these circumstances. 26 Installation

29 Storage, unpacking, assembly and installation The Switchgear must be stored in original packaging. The storage room must be protected from factors that could cause damage, such as water, steam, salt air, pollutants, micro organisms, insects, rodents, etc. It is prohibited to store on the side and to over stack the enclosures. Storage temperature must fall in the -25 to + 70 C range. For the relays and electronic components of in the switchgear observe their manufacturers instructions, on the storage temperature range. If necessary, they should be stored separately, following storage temperatures indicated by their manufacturers. Preservation The medium voltage switchgear may be stored indoors, in a well-closed, dry and protected from external atmospheric factors. Provided that the conditions above are respected, the switchgear do not require special conservation measures. However, to prevent corrosion, the mechanisms parts and the galvanized components are greased before packaging. To reduce dampness a Silica Gel sachet is placed in each panel, not to be removed during storage. Unpacking Unpacking the medium voltage switchgear should follow the below operations: Remove the plastic covers or for the crated products, the lid and sides of the crate; Remove from site all packaging materials; Remove the wooden pallets as follows: open the bottom lid (respecting the operational interlocks, if any earthing circuit is present, it must be closed); unscrew the 4 bolts fastened to the pallet; lift the enclosure, remove the crossbars and place in the final position. After 12 months storage, qualified personnel must verify the state of conservation of the equipment. The packaging materials from products and accessories must be removed from the operation site, managed as waste and disposed of according to environmental regulations. Storage, unpacking, assembly and installation 27

30 Installation Enclosures positioning: After unpacking, place the enclosures on the final position respecting minimum installation quotas according to illustrations presented. The final installation position must be horizontal. Before installation check the horizontally of surface. The cables entry is at bottom, from the cableway placed under the enclosures. The room where the switchgear will be installed should provide clearance to ceiling of 600 ± 100 mm, insuring internal arc resistance. The distance from the enclosures to the side walls and at the back to the rear wall should be 100 ± 30 mm. Front View Depth View Top View 28 Storage, unpacking, assembly and installation

31 Mounting holes as per below drawings: 500 mm width enclosures: P2490_1; P2490_2; P2490_6 750 mm width enclosures: P2490_9 600 mm width enclosures: P2490_3 800 mm width enclosures: P2490_8 Following securing in place, proceed to attach the panels between them by fastening the sides together with screws. For the 4 holes marked in the drawing above use M10x30 screws. 700 mm width enclosures: P2490_ mm width enclosures: P2490_10 Cables compartment access: Opening the doors or covers of the cable connection compartment is made only whilst the earth disconnector is in closed position. In this situation the mechanical interlocks allow to lift and to open the door or the cable connection compartment cover Floor mounting is accomplished using 4 x M10 bolts. Storage, unpacking, assembly and installation 29

32 Side and front protective covers, or increased LV compartments installation For each row of switchgear, a set of side covers is installed, at the two ends of the row. Upon customer s request the enclosures will be resistant to internal, front or the front and side arc. For these options the switchgear will be provided with: upper front protective covers or additional LV Switchgear, in the front. These will be placed above each enclosure, up to 2 m from the floor.. upper side protective covers, on the sides, at the ends of the row of enclosures up to 2 m of the side wall, relative to the floor.. Installation Optional front protection cover or increased LV compartment. Optional: side protection cover, on top side. Environment prerequisites Environment maximum temperature Environment minimum temperature Environment average temperature for 24h Maximum air relative humidity Maximum altitude + 40 C +5 C (ensuring proper cable connections) maximum + 35 C maximum 80% la 20 C m (for higher altitudes refer to the manufacturer) The ambient air must be free of dust, fumes, gases, flammable or corrosive vapours or salt 30 Storage, unpacking, assembly and installation

33 Connecting medium voltage cables The medium voltage cable connection requires that cable channel depth to be sufficient so as to ensure the possibility of observing cable mounting bend radius allowed for the type of cable used. Connecting medium voltage cables according to the following sequence of operations: Open the access compartment covers of the connection cables compartment; Remove the shutter pieces on the floor of the enclosure; Raising the cable from the channel through the enclosure, over a sufficient distance for terminating the connection; Terminating the cables.this instruction does not relate to making the terminal ends or the crimping of cable lugs. These operations must be done as recommended by their suppliers; Positioning and securing the cable to the appropriate terminals: Terminal screw tightening torque is recommended in the following table: Switchgear Type P2490_1 Terminal Screw Type M12 / group Recommended tightening torque [Nm] Switchgear Type P2490_2 Terminal Screw Type M10 / group Recommended tightening torque [Nm] After that reinstall the shutter plates to the floor and secure the appropriate cable with the fixing clamp; Connect the cable s earthing straps to the earth bar; Fixing the cables must be done on their outer shell. No cables to be connected on terminations; Complete clean the cable compartments, removing all foreign bodies, then close, lock and secure with screws the compartment covers. Fitting the secondary circuits elements Re-establish the electrical connections between enclosures as per the electrical diagrams; Install the devices that have been dismantled for transport and connect their connecting wires as per the electrical diagrams; Install, if appropriate, the voltage indicator lamps on the corresponding sockets ; The waste materials resulting from the assembly and connection operations must be removed from the area and from within the products, and managed as waste in accordance with environmental laws. Storage, unpacking, assembly and installation 31

34 Benefits of P2490_xx Switchgear Range Services provided for the product range Easy installation Standardized products with unitary sizes; Lightweight; Basic works for site preparation; Unitary solutions for switchgear switchgear s coupling; Good access for installation. Safe and easy operation Simple and intuitive manual operation of the On/ Off devices Clear and ergonomically placed block diagram; Mechanical interlocks insuring the correct operation of the equipment; Front switchgear display indicating the switchgear operation. Safety of operating personnel Metallic and closed switchgear; Fully equipped for internal arc protection; Indicators are provided to signal the presence of voltage on cables; Earthing protection circuits are provided on all cable outgoings Electroalfa is a leading national manufacturer of medium voltage electrical equipment. SCADA integration Can be equipped with motor actuators for remote control; Auxiliary contacts for transmitting status of On/ Off devices in SCADA Upon request can be fitted with SCADA compatible, protection, operation, metering blocks. Great Value Free of charge consultation for selecting the appropriate technical solution for each application required. Upon delivery, Electroalfa can provide installation, testing, parameterization and commissioning, or technical assistance to carry out the applications required. Complete training is also offered for the end user s operating and maintenance personnel. Electroalfa provides maintenance services for the entire life of the product or occasionally, on request, in order to maintain the equipment supplied in good working order and adapted to new requirements, providing additional functionality through upgrades or replacements for products as a whole or just components thereof (measuring transformers, digital protection, etc.), delivery of spare parts, collection at the end of life and replacement with new products. Compact Design Efficient use of space; Optimal solution on electrical insulation and accessibility within the switchgear. Expendability Designed to be quickly coupled with new switchgear in the same range; Liberty of choice to expand the substation to the left or right; Do not require special tools or spares for expansion; No extra costs; Certified Quality Complete type tests in independent and accredited laboratories; Electroalfa s certified quality system; 32 Benefits of P2490_xx Switchgear Range Services provided for the product range

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36 Manolesti Deal 33 Botosani , Romania T (40-231) (87,88,89) F (40-231) [email protected]