SVS/08 - SVS/12

3.6 - 24 kV modular switchgear

• Epoxy resin insulated

switchgear in sheet steel

enclosure with vacuum

interrupters

• Total reliability in

switching, metering and

distributing electrical

energy with safe

components in functional

panel versions

Safe and reliable in operation

SVS

2

Reliable and safe in operation Epoxy resin is used in the SVS system ashigh-quality primary insulation materialaround live parts. Phases are completelyseparated by epoxy resin thereforepreventing internal arcs. In addition, all

primary components are interconnected via rubber sleeves.The same level of insulation is maintained throughout theentire switchgear. Practical research work on installedswitchgear reveal that the epoxy resin components in theSVS switchgear show no signs of ageing.

System design

Eaton’s modular SVS system is an example of tried andtested high-quality switchgear technology incorporatingvacuum interrupters and epoxy resin insulation.

Modules SVS/08 and SVS/12

The SVS system

A fully-enclosed epoxy resin insulated system

with integral vacuum interrupters.

SVS is a compact, modular system developed for mediumvoltage applications up to 24 kV. With flexibility in mind,the panels are assembled from modular componentsincluding circuit-breakers, load-break switches, fuseholders, metering panels, busbars and cable terminals.The system is highly suitable for switching anddistribution equipment used in electricity distributionnetworks, as well as in a variety of industrial applications.

Eaton is recognised throughout the world as the leadingspecialist in epoxy resin-based insulation tech nology.Vacuum interrupters form the heart of the Eatonswitchgear range. These high-quality interrupters havebeen developed and manufactured by Eaton.

1

A

B

SVS/08 circuit-breaker panel.

Circuit-breaker

1

Load-break switch

1

2

Fused load-break switch1

2

12 kV 24 kV

Fuse holder;Cable terminals.

1

2

Circuit-breaker.+ Optional top cable entry.BA

1 Load-break switch.Top cable entry optional.

1

The busbar systemThe electrical connection betweentwo panels is provided by three single-phase busbar units, which consist oftubular conductors fully embedded inepoxy resin. These conductors contain

tie rods that clamp the busbar pieces on the variouspanels together. Due to the elasticity of the tie rods thepressure required remains constant under all loadconditions. Rubber sleeves at the connection pointsprovide reliable electrical sealing. It is easy to extendexisting installations and to add on further sections.

The changeover switchAll panels with a switching function areequipped with a changeover switchconsisting of interconnected contact pinsmoving in a vertical plane. Since it ismechanically inter locked, the change overswitch can only be operated when the load-break switch or circuit-breaker is in theopen position.

The change over switch has two positions:

Operating positionIn this position, thechangeover switch isconnected to the busbarsystem so the connectionbetween busbar andoutgoing cable can berealised by closing thecircuit-breaker or load-break switch.

Earthed positionIn this position thechangeover switch isconnected to the mainearthing conductor. In the earthed positionthe changeover switchalso forms a safe

earthed barrier from the cable connectionpoint to the busbar system.

Safe in useThe earthed metal enclosure of theSVS system provides personal safetyduring normal operation (protectionlevel IP2XD in conformity with IECpublication 60529). The live primary

parts and primary component connections are fullyinsulated, removing risk of contact with live parts duringmaintenance, revision and assembly work. The insulationis resistant to voltage surges and mains frequencyrestraining voltage occurring with the rated voltage.

FlexibleThe SVS system is modular in construc -tion. This means that any panel combi na -tion and sequence is possible. In addition,the number of panels capable of beingused in an installation is unlimited as

several sections can easily be connected. Existing SVS switch -gear can also be easily extended by one or more panels. Asthe panels can be quickly assembled and connec ted, flexiblecommis sioning of the switchgear is possible. The panels in theSVS system are compact (min. 420 mm wide), resulting inconsiderable savings in costs and installation space.

The vacuum interrupterVacuum interrupters form the heart of the Eaton switchgear range. To achieve a high level of protectionagainst environmental influences thevacuum interrupters are completelycasted in epoxy resin. The direct

casting process is a key competence of Eaton. Thevacuum interrupters consist of a ceramic cylinder,housing a fixed and a movable contact. Move ment ofthe contact under vacuum conditions is facilitated by abellow. A shield surrounding the contacts prevents theinsulators from becoming contaminated by metal vapourproduced during current interruption. This shield alsoensures good potential distribution over the insulator.

Cable connection cone

1

2

Metering panels

Busbar sectionalisersLoad-break switch or circuit-breaker Direct busbar connections

Busbarvoltagemeasuringpanel

Stand alone panel with CB or LBS

Voltage transformers at cable side

1

Voltage transformers; Current transformers.2

1 Applicable for UK.For CB and LBS.1

Modules SVS/12

Diffuse dischargeA typical feature of interrupting currentsup till the rated short circuit current inthe Eaton vacuum circuit-breaker is that a large number of parallel arcs arecreated between the contacts. This‘diffuse discharge’ is characterised byvery low arc voltage and short arc

times, resulting in very low arc energy. Contact wear in avacuum interrupter is therefore virtually negligible. Thevacuum inter rupter in the load-break switch can switchnominal currents of max. 630 A. The vacuum interrupter inthe circuit-breaker can switch short-circuit currents up to amaximum of 20 kA for SVS/08 and 25 kA for SVS/12.

User friendlyThe SVS system features uniform andstraightforward operation. Each panelhas an easy-to-understand and clearlyset out mimic diagram, showing everyswitching action. The cable terminal

area is very easy to access. Cables are connected at thefront of the panels at a height of 80 - 90 cm. There isample space for finishing off and securing the cables. All installations are easy to transport using a lifting crane,a fork-lift truck and steel rollers.

Environmental friendlyEaton selects its materials with care. It is essential they are safe for peopleand the environment - not just duringuse, but at the end of their service life,too. For this reason the SVS system

does not contain SF6 insulation gas and all materials usedare environmentally friendly, according to the presentstate of knowledge.

ApplicationThe SVS system of Eaton is ideally suited for use indistribution networks and as indu strial and buildingswitchgear. The system provides reliable switching,protection, metering and distri bution of elec tricalenergy. The SVS system is based on vacuum tech -nology combined with solid insulation. This makes the SVS system especially suitable for application ininfra struc tural projects (i.e. tunnels and subways) andindu strial or commercial environments (i.e. processingindu stry, food industry and hospitals) where a cleanand safe environment is necessary. The SVS system is used in:• Utility: (Main) distribution stations, compact

secondary substations, wind turbines• Infrastructure: Vacuum switching is especially

suitable for tunnels, subways and otherinfrastructural applications

• Industries: Connection to ring cable or LVS system• Commercial: Hospitals, stadiums, shopping centres,

hotels, etc.

1

C

A

B

1

A

Circuit-breakerLoad-break switch

630 A 1250 A

Vacuum interrupter

Bellows

Bellows shield

Ceramic insulators

Movable contact

Magnetic laminations5

4

3

2

1

Load-break switch. + Optional top cable entry.Optional second cable connection.

BA

C

1 Circuit-breaker.Optional second cable connection.A

1

Operating panels

SVS/08 SVS/12

1

2

3

4

5

Technical data

Dimensions (mm)

SVS/08

System SVS/08 SVS/12Rated voltage Ur kV 12 24 12 24Impulse withstand voltage Up kV 75 125 75 125Power frequency withstand voltage Ud kV 28 50 28 50Rated frequency Fr Hz 50/60 50/60 50/60 50/60

Busbar systemRated current Ir A 800 800 1250 1250Rated short-time withstand current 1) Ik kA/s 20/3 20/3 25/1.5 25/1.5Rated peak withstand current Ip kA 50 50 63 63

Circuit-breakerRated breaking current Ir A 630 630 630/1250 630/1250Rated breaking current Isc kA 16-20 16-20 16-25 16-25Rated short-circuit making current Ima kA 40-50 40-50 50-63 50-63Rated short-time withstand current 1) Ik kA/s 16/1-20/3 16/1-20/3 20/3-25/1.5 20/3-25/1.5

Load-break switchRated breaking current Ir /Isc A 630 630 630 630Rated short-circuit making current Ima kA 50 50 50 50Rated short-time withstand current 1) Ik kA/s 16/1-20/3 16/1-20/3 16/1-20/3 16/1-20/3

Fused load-break switchRated current 2) Ir A 57/61 36 57/61 36

1) Depending on type of vacuum interrupter used.2) 57 A at 12 kV with 12 kV fuse holders and 10/12 kV fuses; 61 A at max. 17.5 kV with 24 kV fuse holders and 10/12 kV fuses;

36 A at 24 kV fuse holders and 20/24 kV fuses.

SVS complies with the following international standardsSystemIEC 62271 - 200 Metal enclosed switchgearIEC 60529 Contact safety (IP protection degree)

ComponentsIEC 62271 - 100 Circuit-breakersIEC 60265 Load-break switchesIEC 62271 - 105 Fused load-break switchesIEC 62271 - 102 Changeover switchesIEC 60044 - 1 Current transformersIEC 60044 - 2 Voltage transformers

SVS switchgear can be used in areas under normal operating conditions as described in IEC publication 60694.

420

700

1350400200

420 630

1110

1060

1350

400

600

150

SVS/12

Eaton Industries (Netherlands) B.V.P.O. Box 237550 AA HengeloThe Netherlands

Tel.: +31 (0)74 - 246 40 10Fax: +31 (0)74 - 246 40 25info.electric@eaton.comwww.eaton.eu

© 2012 Eaton CorporationAll rights reserved.

Form No. 994 050 004October 2012

The information provided in this documentreflects the general characteristics of thereferenced products at the time of issue andmay not reflect their future characteristics.Eaton Corporation reserves the right tomodify the contents of this document andthe characteristics of the referencedproducts without prior notification. Eaton Corporation does not assume liabilityfor potential errors or omission of information in this document.

Eaton’s Electrical Sector is aglobal leader in powerdistribution, power quality,control and automation, andmonitoring products. Whencombined with Eaton’s full-scaleengineering services, theseproducts provide customer -driven PowerChain™ solutionsto serve the power systemneeds of the data center,industrial, institutional, publicsector, utility, commercial,residential, IT, mission critical,alternative energy and OEMmarkets worldwide.

PowerChain™ solutions helpenterprises achieve sustainableand competitive advantagesthrough proactive managementof the power system as astrategic, integrated assetthroughout its life cycle,resulting in enhanced safety,greater reliability and energyefficiency. For more information,visit www.eaton.com/electrical.

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