W-VAC12 - 17.5 kV modular switchgearProduct Focus

• Safety, Reliability andPerformance start withKnowledge andUnderstanding

• Compact flush-fronted or closed-door accessibilitysuits every application and environment.

• Circuit Breaker compartments containautomatically operated shutters for busbar andfeeder circuits with padlock facilities in the closedposition, and self-cancelling latch openmechanisms for testing.

• Positively driven indicators are displayed on thefront panel to show closing spring and breakerstatus.

• The stored energy mechanism is a true mechanically andelectrically trip-free design. Breaker contacts will not touch orclose if they receive a mechanical or electrical closecommand when there is a trip signal.

• For added operator safety, the mechanism is heldmechanically trip-free during breaker racking sequence.

• Interlocked and externally operated earthing switches forcircuit and busbars are available for all switchboards and forcircuits for motor starters.

• Circuit Breaker compartments are designed with horizontallywithdrawable carriages for single tier switchgear, andcassettes for double-tier switchgear and motor starters. Inboth instances the circuit breaker or contactor has a safetyinterlocked racking mechanism.

• Enclosures are sub-divided to form self-containedcompartments separated by earthed metal division plates,and are KEMA certified to IEC 60298.

• Totally segregated compartment for Low Voltageinstrumentation and protection equipment.

• Internal Arc-proof breakers tested to IEC 60298Appendix AA are available. Arc flaps at the top of thehousing allow gases to escape and thus limit anypressure rise to a withstandable level; however, theflaps are strong enough not to collapse inwardsunder reasonable external pressure. The equipmentis designed to ensure minimum risk to personnel inthe event of a fault.

• Metal-clad according to

IEC standards

• Arc proof according to

IEC 60298 Appendix AA

• Modular design suitable

for OEM applications

• Single & double tier

• Rear cable entry boxes

• UK: ENA approval

W-VAC Applying advanced technology with proven engineering

excellence, the Eaton brand of W-VAC provides the highest

safety and reliability standards without compromising

competitiveness. Unique design features and modular,

metal-clad construction allow extreme flexibility to

meet customers’ individual specifications.

ReliabilityEngineered solutions, designed with experience

For ultimate flexibility and maximum operator safety,Eaton switchgear comes with a full range of options• VTs available in either fixed or isolatable versions,

circuit or busbar connected, with fixed or removablelinks or MV fuses.

• Top or bottom MV segregated cable entry is available.• Terminal boxes can be individually segregated.• Optional secondary cable termination compartment

arrangement is available.• Carriage position switches to indicate service and

isolation are optional.• Can be supplied with Mechanical key interlocking.

Earth switching functions designed with operatorsafety, cost-efficiency and customer uptime in mind

Busbar Earth Switch (Single Tier format)Mounted in a segregated box on top of the rearcompartment of the housing, the busbar earth switch isoperated externally. It can be locked on or off withpadlocks or with optional key-coded locks. Arccontainment types are always operable from the front.A failsafe “reverse operation collapsible joint” isdesigned into the operating handle. The handle must beremoved and turned between opening and closing toprovide the vital seconds of delay needed to clear anypossible fault.

Circuit Earth SwitchThis switch is mounted and operated in the rearhousing of the unit. For safety it cannot be operated ifthe carriage is in service. As with the busbar earthswitch, the operating handle contains a collapsiblesafety joint. An interlock also prevents the carriagebeing placed into service when the Circuit Earth switchis “on”. The switch can be padlocked “on” or “off”.

Portable Earthing SwitchAlso available as an alternative to the fixed type is anearthing switch mounted on a horizontal, withdrawablecarriage which when in use replaces the Vacuum CircuitBreaker.

Safety interlockingSafety is the highest design priority of the product andthe equipment is fitted with integral safety interlocks toguard against maloperation.

Voltage TransformersVoltage Transformers can be withdrawn for isolation bymeans of an externally operated padlockablemechanism. MV fuses can be provided. Fixed VoltageTransformers with removable links or MV fuses can beisolated by disconnecting a set of links or removal ofprimary MV fuses.

Easy access top or bottom MV segregated cable entry with optional segregated terminal boxes.

Eaton Medium Voltage Switchgear serving Commercial Buildings,Health and Education.

Withdrawable Circuit Breaker compartments for single or double tier switchgear have the addedsafety of integral interlocked racking mechanisms

PerformanceUsing world-leading technology and proven design solutions engineered for safety and efficiency

SafetyAt the heart of Eaton’s brand of Medium VoltageSwitchgear and Motor Starters sits the world’s leadingVacuum Interrupter.

KnowledgeOur research into vacuum technology started in the1920’s and continues today … a commitment toimproving performance and decreasing cost.

UnderstandingWe designed the technology. The Eaton VacuumInterrupter is the focus of eighty years of experience.

ExperienceMillions of our vacuum interrupters have been inoperation, in every sort of environment in the world,catering for the widest range of applications.

Vacuum TechnologySaves Space and Money Perhaps the greatestadvantage of vacuum technology is the compact size ofinterrupters.

Low Maintenance Operation Fewer moving parts in the pole units versusother arc interruption technologies givegreater reliability.

Longer LifeContact designs prevent hot spots, createless heat and minimise electrode erosion toyield longer life.

Minimal moving parts provide low maintenance VacuumInterrupter operation.

Increasing global legislationconcerning the use of greenhousegases such as SF6 and their relateddisposal costs, makes vacuumtechnology with its reliability, lowmaintenance, and low environmentalimpact the choice for now and thefuture.

Innovative in its design, field-proven over thirty

years of vacuum circuit breaker production and

fully KEMA Certified to IEC 60298, IEC 60129 and

IEC 60056, Eaton’s brand of Medium Voltage

Switchgear and Motor Starters leads the world in

safety, reliability and performance.

World leading technology that is environmentally friendly

Safety

Technical data

Dimensions (mm)

W-VAC

Rated voltage IEC 12 kV IEC 17.5 kVRated current busbars 3150 3150Short-time current 50 - 3 31.5 - 3 Rated current (max.) circuit breakers 3150 3150 Degree of protection IP 3XD 1) IP 3XD 1)

1) NB: a higher protection degree is possible as an option.

W-VAC complies with the following international standards

IEC 60056 Medium voltage alternating current circuit breakers.IEC 60298 A.C. metal enclosed switchgear and controlgear for rated voltages above 1 kV and

up to and including 52 kV.IEC 60129 Specification for alternating current disconnectors and earthing switches.ENA Technical specification 41:36 Distribution switchgear for service up to 36 kV (cable connected).

ON

Front view600 & 750 wide Housings

W-VAC

Circuit Breaker

Cutler-Hammer

CloseToPush

Vacuum

W-VAC

OpenToPush

NP XXXXXXXXXXXXX

Status

OperationsCounter

Breaker

SocketChargeManual

SpringClosing

SpringClosing

StatusContactMain

EARTHOFF

ENSURE KEY IS INSERTEDAND TURNED FULLY CLOCKWISE BEFOREATTEMPTING TO OPERATEFIGURE LOCK ABOVE

ONEARTH

BUSBAR EARTHING

EARTH

600 (630-1250A),750 (2000A)

FRONT PANELLOCK

ATTEMPTING TO UNLOCK FRONT PANELENSURE VCB IS TRIPPED BEFORE

LIFT PIN TO FREE CARRIAGE AND

TO WITHDRAW VCB

TRANSFER HANDLE TO RACKING SPIGOT & TURN AS INDICATED

TURN HANDLE TO UNLOCK FRONT PANEL

FRONT PANELUNLOCKTO ISOLATE

TO ENGAGE

CARRIAGE FREE

CARRIAGE LOCKED

Circuit earthswitch

Relay chamber

Busbar earth switch16 kA Arc deflector20 kA Arc canopyIsolatable circuit voltage transformers

LV Terminal box

900

Glandentry point

Glandentry point

Cable box

400

900

400

450

2395

.5

20 kA Arc canopy16 kA Arc deflector

Circuit voltage transformersBusbar earth switch

635815555815555

Cable box

2395

.5

Circuit earthswitch

Relaychamber

Front view1000 wide Housing

W-VAC

Circuit Breaker

Cutler-Hammer

CloseToPush

Vacuum

W-VAC

OpenToPush

NP XXXXXXXXXXXXX

Status

OperationsCounter

Breaker

SocketChargeManual

SpringClosing

SpringClosing

StatusContactMain

FIGURE LOCK ABOVEATTEMPTING TO OPERATECLOCKWISE BEFOREAND TURNED FULLY ENSURE KEY IS INSERTED

ONEARTH

OFFEARTH

ONEARTH

BUSBAR EARTHING

1000

FRONT PANELLOCK

ATTEMPTING TO UNLOCK FRONT PANELENSURE VCB IS TRIPPED BEFORE

LIFT PIN TO FREE CARRIAGE AND

TO WITHDRAW VCB

TURN HANDLE TO UNLOCK FRONT PANEL

TO ISOLATE

TO ENGAGE

TRANSFER HANDLE TO RACKING SPIGOT & TURN AS INDICATED

CARRIAGE FREE

FRONT PANELUNLOCK

CARRIAGE LOCKED

Applications

• Process industry

• Industrial

• Marine & Offshore

• Defense

• OEM’s

Eaton’s MV switchgear is fully certified to all relevantIEC standards followingindependent testing by KEMAlaboratories

In the electrical industry, Eaton is a global leader in electrical control, power distribution, and industrial

automation products and services. Through advanced product development, world-class manufacturing

methods, and global engineering services and support, Eaton's Electrical business provides customer-

driven solutions under brand names such as Cutler-Hammer®, Powerware®, Durant®, Heinemann®,

Holec® and MEM®, which globally serve the changing needs of the industrial, utility, light commercial,

residential, and OEM markets. For more information, visit www.eatonelectrical.com.

Eaton Corporation is a diversified industrial manufacturer with 2006 sales of $12.4 billion. Eaton is a

global leader in electrical systems and components for power quality, distribution and control; fluid

power systems and services for industrial, mobile and aircraft equipment; intelligent truck drive train

systems for safety and fuel economy; and automotive engine air management systems, powertrain

solutions and specialty controls for performance, fuel economy and safety. Eaton has 61,000 employees

and sells products to customers in more than 125 countries. For more information, visit www.eaton.com.

Commercial buildings

Power plants

Main feeder stations

Subdistribution stations

Process industry

Industry

Residentialapplications

Shops and offices

2 3 4 5 6

3 5 6

3 5 6

1 2 3

1 2 3

4 5 6

Transformerstations 1 2

Eaton medium voltage products in the energy chain

Magnefix1 MMS5 W-VAC6Unitole4SVS3Xiria2

© 2007 Eaton Electric B.V.All rights reserved.

Printed in The Netherlands.Form no. 6005864A/1/SGJune 2007

Eaton Electric B.V. P.O. Box 237550 AA HengeloThe NetherlandsTel. : +31 74 246 40 10Fax : +31 74 246 40 25holec-info@eaton.com

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