medium voltage switchgear for secondary ......2 medium voltage business unit portfolio medium...

MEDIUM VOLTAGE SWITCHGEAR fOR SECOnDARy DISTRIbUTIOnCATALOGUE

Code: P2490_xx

CONTENTS

1About us

2Medium Voltage Business Unit Portfolio

3Overview

8Medium Voltage Switchgear Types. Equipment used.

13Technical features

14Switchgear description

21Switchgear Designs

25Safety and user protection

26Packaging

27Storage, unpacking, assembly and installation

32Benefits of P2490_xx Switchgear Range

32Services provided for the product range

1About us

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.

3 factories in Botosani

Production facilities and sales representatives in Romania

New R&D Center

A turnover around 35.5 million euro in 2014

A strong brand, based on high experience, qualifications and enthusiasm of 380 professionals

Electroalfa today: Our products and services portfolio includes the following:

Low and Medium Voltage Products

Steel Fabricated Parts

Turnkey Projects

Renewable Energy Production

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

2 Medium Voltage Business Unit Portfolio

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.

3Overview

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

Junction points .Photovoltaic and Wind Power Plants.

Power Supply for buildings such as residential areas, hospitals, office buildings, stadia, airports, supermarkets, industrial facilities, etc.

LV/MV transformer substations, compact transformer substations or transformer substations in erected buildings,

4 Overview

The P2490_xx range includes switchgear for all the LV/MV substations and for industrial secondary distribution functions.

P2490_1

line switchgear with SF6-Insulated Load Break Switch Disconnector

P2490_2

transformer switchgear with SF6-Insulated Load Break Switch Disconnector and HRC fuses

P2490_3

metering switchgear with SF6-Insulated Load Break Switch Disconnector, voltage metering transformers, HRC fuse protected

P2490_4

coupling switchgear with SF6-Insulated Load Break Switch Disconnector

P2490_5

busbar connection switchgear

P2490_6

connection switchgear for connecting the power cable directly to the main busbar

P2490_7

metering switchgear with current and voltage metering transformers

P2490_8

switchgear with SF6-Insulated Load Break Switch Disconnector, vacuum Circuit Breaker and microprocessor protection block

P2490_9

IST internal services transformer switchgear, SF6-Insulated Load Break Switch Disconnector powered, HRC fuse protected

P2490_10

metering switchgear with SF6-Insulated Load Break Switch Disconnector, current metering transformers, and voltage metering transformers

The P2490_xx range switchgear are for indoor use, metal clad, with simple extensible busbar system.

5Overview

Standards

The switchgear panels are designed and tested in accordance with the following European standards:

• SR EN 62271-200:2004 High-voltage switchgear and controlgear AC metal-enclosed switchgear. Part 200: AC metal-enclosed switchgear for rated voltages above 1kV and up to and including 52kV .

• SR EN 62271-1:2009 High-voltage Switchgear And Controlgear - Part 1: Common Specifications.

• SR EN 62271-102:2007 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, andhence the medium voltage switchgearpanel as well, starting from the design,procurement assessment, supply,manufacture, flows and final tests andchecks Electroalfa has implementedand maintains a system ofIntegrated Management System thatmeets 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.

6 Overview

Type Tests

The Switchgear were type tested with fully satisfactory results at ICMET Craiova Laboratories.

7Overview

Climate and ambient conditions

Location indoors

Climate Group WDr/CT (moderate: warm dry/ cold /temperate)

Maximum environment temperature, during use +40°C

Maximum average temperature for 24 hours, during use +35°C

Minimum environment temperature, during use -5°C

Temperature during transport and storage -25°C… +70°C

Humidity during use

Daily average value maximum 95%

Monthly average value maximum 90%

The average daily atmospheric vapor pressure maximum 2,2kPa

The average monthly atmospheric vapor pressure maximum 1,8kPa

Maximum altitude 1.000 m

The environment must be free of dust, no corrosive or flammable gases, vapors or salt beyond established by currentregulations for indoors electrical installations. For different values to the above consult the manufacturer.

8 Medium Voltage Switchgear Types. Equipment used.

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

Medium Voltage Switchgear Types: Equipment used.

P2490_1 Line switchgear with SF6-Insulated Load Break Switch Disconnector

Basic Equipment


Type K operating mechanism






Heating resistance

Optional




Fault Indicator

Phases sequence checking device



Cable terminal ends


P2490_3 Metering switchgear with SF6-Insulated Load Break Switch Disconnector, voltage metering transformers, HRC fuse protected

Basic Equipment



HRC fuses socket



Voltage metering transformers



Heating resistance

Optional




Voltmeters



MV Fuses



P2490_4 Coupling switchgear with SF6-Insulated Load Break Switch Disconnector

Basic Equipment


Type K operating mechanism



Three-phase main busbar system incoming/ outgoing, left/ right


Heating resistance

Optional






Front protective covers


P2490_5 Busbar connection switchgear

Basic Equipment

Three-phase main busbar system incoming/ outgoing, left/ right

Optional




Heating resistance


P2490_6 Connection switchgear for connecting the power cable directly to the main busbar

Basic Equipment



Heating resistance


Optional


Fault Indicator




Cable terminal ends


P2490_7 Metering switchgear with current and voltage metering transformers

Basic Equipment

Current metering transformers

Voltage metering transformers complete with HRC fuses


Heating resistance

Optional



Voltmeters




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



Earthing Circuit on Cable terminals



Heating resistance

Optional


Circuit Breaker On/ Off switching motor

Auxiliary contacts for switch disconnector, circuit breaker and earthing circuit



Digital protection relay




Cable terminal ends


P2490_9 IST internal services transformer switchgear, SF6-Insulated Load Break Switch Disconnector powered, HRC fuse protected

Basic Equipment



HRC fuses socket



Internal services transformer



Heating resistance

Optional




Voltmeters



MV Fuses



P2490_10 Metering switchgear with SF6-Insulated Load Break Switch Disconnector, current metering transformers, and voltage metering transformers

Basic Equipment


Type K operating mechanism and SF6 pressure indicator


Voltage metering transformers complete with HRC fusees


Heating resistance

Optional




Auxiliary contacts for Voltage presence indicator;

Voltmeters




13Technical features

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

kV 125

3 Lightning impulse withstand rated voltage (across isolating distance) – Up

kV 145

4 Industrial frequency withstand rated voltage, 50 Hz – Ud

kV 50

5 Industrial frequency withstand rated voltage for the separation distance, 50 Hz – Ud

kV 60

6 Rated current– Ir

Main busbars A 630

Switch disconnector A 630

7 Breaking current – I1 A 630

8 Rated admissible short-time current-– Ik KAef/1 s 20

9 Rated admissible peak current- – Ip kAmax 50

10 Rated frequency Hz 50

11 Arc resistance, front and side (switchgear equipped with protective frontal covers or enlarged LV compartment and protective upper side covers)

KA/sec IAC AFL 16KA/1 s

12 Overall Dimensions

Width mm 500 ÷1.000 (according to the design)

Depth mm 985

Height mm 1.600 (without secondary circuits panel)

2.000 (with secondary circuits panel)

13 Protection degree:

In operating position, with all doors and panels closed IP 3X

Between adjacent interior compartments IP 20

14 Main circuits busbar insulation Shrinkable tube, terminals and air protection

14 Switchgear description

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 andmetal enclosed, with compartments and fitted with fixed equipment. The equipment type allows a compact design with small dimensions.

The medium voltage switchgearpanels consist of a metal housingmade of sheet metal panelsassembled with special rivets,fasteners and point welding, ,which accommodate the mediumvoltage equipment according tothe operation requirements and themetering, command, signalling andprotection low voltage equipment

The removable panels or the oneswhich provide access to live partsof the switchgear are provided withwarning signs: “Warning! HighVoltage! Electrocution Hazard!”.


The switchgear enclosures are provided with the following compartments:

The all-purpose BusbarCompartment

The all-purpose busbar compartmentis located at the top, at the rearand includes the all-purposebusbar placed on the load switchdisconnector terminals withinsulating shrink tube and siliconeinsulation in areas of contactwith the upper terminals of thedisconnector.It is separated from the secondarycircuit compartment by a metalpanel and from the by the cableconnection lower compartmentthrough the disconnector’s housing.Access within this section is notallowed in normal operation of othersubstation panels.

The Load Break SwitchDisconnector Compartment

This section is the GSC-24 indoor switch disconnector itself, sealed inside the insulating resinhousing.

The enclosure materialprovides good insulation featuresand resistance to moisture andatmospheric contaminants.The insulating housing consists ofupper shell and lower shell, tightlyclosed and the interior is filled withSF6 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”.

Connection Compartment

The connection compartment issituated at the lower side of theenclosure and may include, dependingon panel type: the lower terminalsof the switch disconnector, thecapacitive voltage dividers and thecable terminals. For the fused switchdisconnector panels, the fusesare situated in this compartmentalongside the earthing disconnector below the HRC fuses..The compartment is metal enclosedfixed with special rivets andscrews. Access to this section shallbe realised only if the earthingdisconnector is closed by openingthe 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

to the earthing busbar by means of a special provided screw.

Secondary Circuits and Operation Mechanism

The Secondary circuit compartmentis located in the front top part ofthe panel and is accessible in normaloperation 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..


Load Break Switch Disconnector

GSC-24 with Type K 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 62271-1, IEC 60265-1, IEC 62271-105, IEC 62271-102 and GB 3804.

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.

GSC-24 with Type A mechanism

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.

The shape and dimensions of GSC-24 switch disconnector


Switch Disconnector Main Circuit

The main circuit of GSC-24 indoors switch disconnector is sealedinside the resin enclosure.

The enclosure material provides goodinsulation features and resistanceto moisture and atmosphericcontaminants. The insulatinghousing consists of upper shell andlower shell, tightly closed and theinterior is filled with SF6 gas at apressure of 0.4 bar.

A safety valve is provided at thebottom rear of the casing. This isa protection measure to a faultsituation, where the high pressure,internal gas can come out throughthe safety valve without affectingthe operator or the switchgear.

The GSC-24 switch disconnector can be configured as per below:

Arc extinction

The GSC-24 load break switchuses SF6 gas as arc extinguisher.Whilst in on or off position, theelectric arc will spin through theaction of a magnetic field given by apermanent magnet. Subsequentlythe arc will be cooled andextinguished by SF6 gas.

Operating mechanism andinterlocking 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

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 rotationof the crank activates the energy of the main spring and so connecting the mobile contact on “Closed” position of the main circuit.

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”

C. Earthing circuit operation (EC)

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.

GSC-24 load switch operation diagram.

Closed

Open

Earthed


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 .


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.

A. Closing the main circuit

Through operating the handle,clockwise, the lower lever 1 rotates,compresses the closing spring12, and the opening spring 8,simultaneously in order to providethe required energy for the closingoperation.When the lower lever 1 activates thetripping pin and the lower slidingwheel and releases the closing springcausing the closing of the maincircuit..

B. Opening the main circuit

To open the main circuit pressthe opening red push-button.Alternatively the fuses tripping pinor the opening electromagnet canactivate the tripping pin 2. Theseoperations cause the release of theappropriate spring and the openingof the main circuit by the load switchdisconnector..

C. Earthing circuit operation (EC)

The EC operation for the Type Amechanism is similar to the one forType 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 terminalsearthing circuit, manually.

Figure 3. Type A mechanism

Figure 4. Type A mechanism, motorized


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.

Figure 4. Interlocking mechanisms diagram.Operating Mechanism Interlockings

The SF6 insulated GSC-24 type,indoors medium voltage switchdisconnectors, including the fusedvariant are provided with followinginterlockings:

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.

21Switchgear Designs. Dimensions.

P2490_1 Line switchgear with SF6-Insulated Load Break Switch Disconnector

Overall Dimensions

Width: 500 mm

Depth: 985 mm

Height: 1.600 mm

Maximum Height with Enlarged LV compartment: 2.000 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: 1.600 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: 1.600 mm


Weight: approximative 300 Kg (depending on the type of metering transformers)

Switchgear Designs. Dimensions.

22 Switchgear Designs. Dimensions.

P2490_4 Coupling switchgear with SF6-Insulated Load Break Switch Disconnector

Overall Dimensions

Width: 500 mm

Depth: 985 mm

Height: 1.600 mm


Weight: 200 Kg

P2490_5 Busbar connection switchgear

Overall Dimensions

Width: 500 mm

Depth: 985 mm

Height: 1.600 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: 1.600 mm



Weight: 120 Kg

23Switchgear Designs. Dimensions.

P2490_7 Metering switchgear with current and voltage metering transformers

Overall Dimensions

Width: 700 mm

Depth: 985 mm

Height: 1.600 mm



P2490_8 Switchgear with SF6-Insulated Load Break Switch Disconnector and vacuum Circuit Breaker

Overall Dimensions

Width: 800 mm

Depth: 1.120 mm

Height: 1.600 mm




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: 1.600 mm


Weight: approximative 350 Kg (depending on the internal services transformer type)

24 Switchgear Designs. Dimensions.

P2490_10 Metering switchgear with SF6-Insulated Load Break Switch Disconnector, current metering transformers, and voltage metering transformers

Overall Dimensions

Width: maximum 1.000 mm (depending on the type of metering transformers)

Depth: 985 mm

Height: 1.600 mm

Maximum height with Enlarged LV compartment: 2.000 mm

Weight: approximative 420 kg (depending on the type of metering transformers)

25Safety and user protection

The Switchgear are environmentallyfriendly and do not pose a risk thelife, health and safety of operatingpersonnel.

This is achieved by the fact that theproducts have been designed, builtand tested to protect the operatingpersonnel 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;

• 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 62271 - 200, 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;

• 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 switchgear are equipped with mechanical interlocks designedto prevent misuse. Familiarity withthese interlocking is essential beforeperforming any manoeuvre withmedium 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..

•When the earthing circuit is closed, the switch disconnector in open position for the main circuit cannot be operated.

Padlock provision

The equipment is provided witha padlock provision to preventforcing the mechanism upon actuating the earthing circuit and the main disconnector.

1. Ureche pentru blocarea cu lacăt a acţionării CLP.

2. Ureche pentru blocarea cu lacăt a acţionării separatorului principal.

1

2

Safety and user protection

26 Installation

Installation

The indoor medium voltage switchgear are placed on wooden racks and packaged for land transportation in shrink wrapped polyethylene foil, provided with anti-condensation 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, accompanyingdocuments and equipment likelyto be destroyed duringtransport are packed separately.

When the switchgear are part ofcomplex equipment, such as acompact transformer substationor a junction point, the enclosures can be delivered fully installed in the assembly, unless otherwise agreed with the client.

Transport

The panels can be movedby road, rail, air or sea, closed, in normal operational position, packaged and secured to avoid any mechanical damage.

If the transport is made on roughroads the maximum speed must be30km/h.

The transport terms and conditionsare agreed with the client prior tosigning the contract. The packagingrequirements depend on thesecircumstances.

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 irregularitiesnotify the carrier and forward theseobservations to the manufacturer.

The complaints about thedelivery are acceptable bythe manufacturer within 3 days ofreceipt, provided that the carrier hasbeen notified as well.

Handling

The switchgear must be kept in theiroriginal packaging up to the place ofinstallation.

The handling of the mediumvoltage switchgear, regardless of thepackaging 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.


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.

After 12 months storage, qualifiedpersonnel must verify the state ofconservation of the equipment.

Preservation

The medium voltage switchgearmay be stored indoors, in awell-closed, dry and protected fromexternal atmospheric factors. Provided that the conditions aboveare respected, the switchgear do not require special conservation measures.However, to prevent corrosion,the mechanisms parts and thegalvanized components are greasedbefore packaging.

To reduce dampness a Silica Gel sachet is placed in each panel, not to be removed during storage.

Unpacking

Unpacking the medium voltageswitchgear should follow the belowoperations:• 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.

The packaging materials fromproducts and accessories must beremoved from the operation site,managed as waste and disposed ofaccording to environmental regulations.

28 Storage, unpacking, assembly and installation

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

Top View

Depth View


500 mm width enclosures: P2490_1; P2490_2; P2490_6

Mounting holes as per below drawings:

Floor mounting is accomplished using 4 x M10 bolts.

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.

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

600 mm width enclosures:P2490_3




1.000 mm width enclosures:P2490_10

30 Storage, unpacking, assembly and installation

Installation

Environment prerequisites

Environment maximum temperature + 40˚C

Environment minimum temperature +5˚C (ensuring proper cable connections)

Environment average temperature for 24h maximum + 35˚C

Maximum air relative humidity maximum 80% la 20˚C

Maximum altitude 1.000 m (for higher altitudes refer to the manufacturer)

The ambient air must be free of dust, fumes, gases, flammable or corrosive vapours or salt

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..

Optional front protection cover or increased LV compartment.

Optional: side protection cover, on top side.

Side and front protective covers, or increased LV compartments installation


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

Recommended tightening torque [Nm]

M12 / group 8.8 75

Switchgear Type P2490_2

Terminal Screw Type

Recommended tightening torque [Nm]

M10 / group 8.8 50

• 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.

32 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

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;

• 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.

Benefits of P2490_xx Switchgear Range

Services provided for the product range

Manolesti Deal 33Botosani 710003, RomaniaT (40-231) 532186 (87,88,89)F (40-231) [email protected]

www.electroalfa.ro

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