ABB MV Switchgear Overview 2009 (NXPowerLite)

MV M l Cl d S i hFebruary 2008

MV Metal-Clad SwitchgearThe safest, most reliable Switchgear in the market today

© ABB Group May 4, 2009 | Slide 1

Arc-Resistant Standards

Introduction – Today’s TopicsWhat is Arc Flash and the risks it represents

Arc-Resistant Switchgear Standards

ABB Switchgear Offering

Characteristics of SafeGear Arc-Resistant Switchgear

Other Safety Features available in Switchgear today


What is an Arc Flash?The result of a rapid release

of energy due to an arcing fault between phases, neutral or a ground.

An arc arises when at least part of the current passes through a dielectric, usually air

Maximum peak power up to 40 MW

Arc temperature up to five times the f t t f th T t fsurface temperature of the sun

(20,000°C)

Light intensity more than 2000 times

Temperature of the sun surface is about 5000°Cg y

that of normal office light

Volumetric expansion approximately 40 000+ - 1

about 5000 C.


40,000+ - 1

Arcing Incidents Do Happen

Fault characteristics

An arc arises when at least part of the current passes through a dielectric, usually air

M i k t 40 MWMaximum peak power up to 40 MW

Arc temperature up to five times the surface temperature of the sun (20 000°C)p ( )

Light intensity more than 2000 times that of normal office light


Arc Flash Danger StatisticsCurrently, OSHA lumps Arc Flash incidents in with electrical incidents.

A recent survey showed that 5-10 people per day go to burn centers due to arc flash incidents – that does not include those going to local and regional hospitalsinclude those going to local and regional hospitals

That is 2000-3500 people a year in the US!

With the high mortality rate of burn injuries this can translate toWith the high mortality rate of burn injuries, this can translate to hundreds of deaths a year

IEEE did a study with a large utility and over the last 53IEEE did a study with a large utility and over the last 53 years, they have had 1 arc flash incident every 18 months.


Arcing Incidents Do Happen

Security Video of Arc flash incidentDistributed by NFPA


y

Arc-Resistant SwitchgearCauses of internal arc faults

Improper maintenance, mechanical, and interlock failuresfailuresFailure to follow proceduresGradual component or insulation breakdownForeign objects, rodents, snakes, etc.

Effects of an internal arc faultPressure increase in an enclosed compartmentPressure increase in an enclosed compartmentFunction of arc voltage, current, number, and duration of arcs, volumeRapid onset (10-15 ms) results in explosive forcesThermal effects, hot gasesCatastrophic to nearby personnel and equipmentCatastrophic to nearby personnel and equipment


Evolution of Arc-Resistant StandardsInterest in Europe – uninsulated bus was common

Annex AA to IEC 298 was approved in 1981

EEMAC G14-1 was published in 1987 in CanadaEEMAC G14-1 was published in 1987 in CanadaType A – arc-resistant construction at the front only

Type B – arc-resistant construction at the front, back, and sides

T C i t t t ti t th f t b k d id d b tType C – arc-resistant construction at the front, back, and sides, and between compartments

IEEE C37.20.7-2007 includesType 1 similar to EEMAC Type A aboveType 1 – similar to EEMAC Type A above

Type 2 – similar to EEMAC Type B above

Annex A addresses suffixes “B” and “C”

T 1C T 1 b t l ith i t d i f t b tType 1C – Type 1, but also with arc-resistance designs or features between adjacent compartments

Type 2B – Type 2 with LV instrument compartment door open – relay and maintenance personnel survive

Type 2C – Type 2 with arc-resistance features between adjacent compartments –switchgear survives with minimum damage

Type 2BC – The ultimate in protection – combines types 2B and 2C


Industry Recognized Arc-Resistant Standards

OSHA 29 Code of Federal Regulations (CFR) Part 1910, Subpart S

NFPA 70E-2004, “Standard for Electrical Safety in the Workplace”

IEEE 1584 2002 “G id f A Fl h H d A l i ”IEEE 1584-2002, “Guide for Arc Flash Hazard Analysis”

IEEE C37.20.7-2007, IEEE Guide for Testing Medium-Voltage Metal-Enclosed Switchgear for Internal Arcing Faults


Arc-Resistant Standards

Current Requirements and How They ApplyOSHA 29 Code of Federal Regulations (CFR) Part 1910, Subpart S

Safe practices to prevent electrical shock or burns must be implementedMandates that exposed workers must be qualifiedp qRequires provisions for the appropriate personnel protective equipment (PPE)

NFPA 70E 2004 “St d d f El t i l S f t i th W k l ”NFPA 70E-2004, “Standard for Electrical Safety in the Workplace”

Details steps to comply with the OSHA requirementsWorker trainingWorker trainingAppropriate, safe toolsSafety programArc flash hazard calculationsPPEEquipment warning labels


Equipment warning labels

THE NEW NFPA 70E – 2009, TABLE 130.7 (C) (9) Arc-Resistant SWITCHGEAR TYPE 1 OR 2

Hazard/Risk Category for Arc-Resistant Switchgear

Insertion or removal of CBs from cubicles, doors open 4Insertion or removal of CBs from cubicles, doors open 4

CB operation with enclosure door closed 0

Insertion of removal of CBs from cubicles doors closed 0Insertion of removal of CBs from cubicles, doors closed 0

Insertion or removal of ground and test device with door closed 0

Insertion or removal (racking) of voltage transformers on or off the 0Insertion or removal (racking) of voltage transformers on or off the bus, door closed

0

Work on control circuits with energized electrical conductors and 2

Applies to clearing times of <0.5 sec with a perspective fault current not to exceed the arc-i t t ti f th i t

circuit parts 120V, exposed

resistant rating of the equipment.


Arc Flash Introduction - Mitigation TechniquesRedirecting energy away from workersReducing the arcing current (En ~Ia)

Not effective method as test data is required for current limiting devices (fuses)

Increasing the working distance (E~1/D)Using remore racking device, remote operating devices incident energy might be reduced

Reducing the clearing time (E~t)Reducing the clearing time (E t)Zone selective interlocking

slow (100ms) + breaker operate time)can not be used for retrofit installations

Bus bar protectionexpensive to install due to number of CT’sexpensive to install due to number of CT s

Light Detection


ANSI C37.20.7 Accessibility Types1

Front only1C1C

Front plus between compartments within a section or between adjacent vertical sections (except main bus compartment)

22Front, back, and sides

2BIsolation of the Low Voltage Compartment with the instrument door open

2CFront back and sides plus between compartments within a section orFront, back, and sides, plus between compartments within a section or between adjacent vertical sections (except main bus compartment)

2BCOff t t t t t d l lt i l ti Off thOffers compartment to compartment and low voltage isolation. Offers the very best solution for personnel protection and system reliability.

SafeGear meets IEEE C37 20 7 2007© ABB Group May 4, 2009 | Slide 13

SafeGear meets IEEE C37.20.7-2007 Type 2, 2B, 2C and 2BC!

Arc Faults

SafeGearConventional Switchgear


Pressure Buildup

900

enclosure rupture

vent flap opens

500600700800

SI SafeGear

conventional

100200300400P SafeGear

0

1 3 5 7 9 11 13 15 17 19 21 23 25 time (ms)

Pressure measurements Successful SafeGear test


Introduction to ABB ANSI Switchgear

5 to 15 kV metal clad switchgearAdvanceAdvance

Traditional non-arc-resistant switchgear

SafeGearMeets ANSI Standard C37.20.7-2007 for arc-resistanceFour versions – Types 2, 2B, 2C and 2BC available

Vacuum circuit breakersAMVAC

Magnetically actuated mechanism

ADVACS i d h iSpring operated mechanism


Ratings

Nominal Voltage 4.16 7.2 13.8Ratings

BIL (kV) 60 95 95

Continuous Current (A) 1200 1200 1200Main Bus 2000 2000 2000

3000 3000 30003000 3000 3000Forced Air Cooled* 4000 4000 4000

Short Circuit (kA) 20 20 20K Factor = 1.0 25 25 25

31 5 31 5 31 531.5 31.5 31.540 40 4050 50 50


4000 A rating available for Advance only.

ABB Metal-Clad SwitchgearFeatures

Galvanic constructionHem bendingHem bendingModular design

Bolted frameInstrument compartmentBreaker compartmentBus and cable compartmentpPotential transformer compartment

Arc-resistant switchgearSafeGearSafeGearPower distribution centerPlenum

Ci it b k t h lCircuit breaker technologyADVACAMVAC magnetically actuated circuit


breaker option

Galvanic Construction

Resistant to rust, corrosion and scratches

No paint required

Highly reflective

(Side ie ith co ers remo ed)(Side view with covers removed)


Hem Bending

No sharp edges for increased safetyincreased safety

Improved rigidity

Reduces arc propagation

Forms a self-supporting pp gstructure

Hem bending creates a rigid structure and sturdyconstruction in metal-clad switchgear (reinforced,

arc-resistant door construction shown).


Modular Design

Bolted construction enables faster replacement and modification in the field

Allows for easy replacements, repairs, and specialized configurations

Maintains the smallest, compact product


Instrument CompartmentTotal isolation from medium voltage components

No instruments on breaker doorNo instruments on breaker door

Galvanic interiors provide superior reflectivity inside compartments

Available in four sizes19”, 38”, 57”, 95”

Gasketed door

Easy accessibility for operators

Truck operated cell switches located in the low voltage compartment for easy access and p yto minimize exposure


Breaker Compartment

Dual safety shutter actuatorsInterlock prevents manual operation

Mechanically forced by breaker movementmovement

Shutters grounded by cable

Clear Lexan shutters availableClear Lexan shutters available

Position indicatorConnectedConnected

Test

Disconnected


Breaker Compartment

Automatic secondary disconnect

Provides improved safety for workers while operating the breakers when usingbreakers when using SafeGear

Single or double plug secondary contacts

Grounding contact

Interference blockPrevents installing undersized breakersbreakers


Bus & Cable Compartments

Copper bus

Epoxy coated bus insulation systemp y yNo sleeve insulation

Silver plating standardp gTin plating available

Porcelain or glass polyester standoffPorcelain or glass polyester standoff insulators

Molded vinyl boots with re-useable hardware

Catalog number embossed on each boot to make reordering easyboot to make reordering easy

No tape used


PT CompartmentsOne to three potential transformers (PTs)

In SafeGear less than 40kA dutyIn SafeGear, less than 40kA duty is 19 inches high. 40kA and 50kA duty is 38 inches high

Closed door racking in and out adds element of safety

Drawout construction withDrawout construction with extension rails makes the compartment easily accessible

Lif k i d lLift truck not required to replace fuses

Delrin snuffer contact technologygy


CPT Compartments15 kVA, single-phase, truck mounted

Larger size CPT’s are fixed mounted in th t tthe rear compartment

Fuse truck with fixed mounted CPT

Cl d d ki dd l t fClosed door racking adds element of safety

Drawout construction with extensionDrawout construction with extension rails makes the compartment easily accessible for fuse replacement. Compartment is 38 inches highCompartment is 38 inches high

Lift truck not required to replace fuses

Delrin snuffer contact technologyDelrin snuffer contact technology


Arrangements


SafeGear Arc-Resistant Switchgear

Enhanced safety for personnel and equipment

Flap/vent system to relieve pressurePatented collection chamberGases are safely expelled out the roofGases are safely expelled out the roof through the plenum

Built to EEMAC G14-1 1987 type B and C i d IEEE C37 20 7 2007C construction and IEEE C37.20.7-2007 Types 2, 2B, 2C and 2BC

More than 25 years experience in arcMore than 25 years experience in arc-resistant switchgear

Design allows for flexibility in g yconfigurations and promotes superior safety performance


Certified by an independent test lab

SafeGear Demonstration


Location of Flaps and Vents in SafeGear

ONE-HIGH 1200A 1200A W/2 VT UNITS TWO-HIGH 1200A


1200A W/FUSED CPT 2000A W/1 VT UNIT ONE-HIGH 3000A

SafeGear Patented Internal Collection Chamber


SafeGear Construction

Breaker doors secured with heavy duty hinges and bolts

Multi-point handle and latching available

Double thickness of steel

Gasketed constructionSeals gases inside

Lexan arc-resistant window –largest in industry allows thelargest in industry – allows the operator to check position and status of circuit breaker without

i th ll dopening the cell door


Plenum Benefits

Channels gases out of PDC PlenumPDC ceiling

Provides room for flap operation

Allows gases to expand

Protects cable trays

Maintains weather protection

Allows lower building height

PDC AisleTwo-high SafeGear


Plenum Design

Sealed duct across top of switchgear, covering all vent flaps

Si d d h d t i i i t b l d b kSized and shaped to minimize turbulence and back-pressure

Allows room for cable trays and conduit entry

Channels gases safely out of building, through wall penetration and vent


Plenum End Flap

Flaps normally closedclosed

Opens with pressure i f f ltin case of arc fault


Circuit BreakerClosed door racking to all positions adds element of safetyThree position breakerThree position breakerPositive stop in all positionsBreaker positively latched in the

t t (Di t)compartment (Disconnect)Racking mechanism is integral to the breaker elementAuxiliary switches are breaker-mounted and wired out through the secondary disconnect, eliminating the need for , gseparately mounted mechanism operated cell switchesFront access mechanismFront access mechanismCentered racking mechanism for easy alignmentEmbedded pole design


Embedded pole design

ADVAC® Circuit Breaker

M l dManual springcharge portManual open and

close push buttons

Non re settable

charge port

Non-re-settableoperations counter

Spring chargestatus indicator

Open/close indicatorCell locking tabs

d h dland handles

Racking release lever

Racking access port Racking padlock provision for


lockout and safety procedures

ADVAC® Circuit Breaker

Simple, front-accessible operating mechanism and control components

On-board auxiliary contactseliminate the need for cell-mounted MOC switches and related mechanical linkages

p

related mechanical linkages4a, 4b standard9a, 8b optional

Auxiliary switch

Close &trip coils y

operating shaft

Main drive shaft

Precision cam Charging motor

Toroidalspring


AMVAC Circuit BreakerOperating mechanism rated for 100,000 operations

10 times ANSI requirement10 times ANSI requirementInterrupter assemblies rated for 30,000 full load operationsVirtually maintenance free (minor lubrication needed)Only seven moving partsOnly seven moving parts

90% less partsPermanent magnet for holding force g gand latchDual capacitors store energyF ll operation for p to 90 secondsFull operation for up to 90 seconds after loss of control powerInterchangeable with ADVAC


AMVAC Circuit Breaker 1. Upper Primary Terminal2. Vacuum Interrupter3. Epoxy Potting Compound4. Lower Primary Terminal5. Flexible Connector6. Wipe Springs7. Insulated Pushrod8. Jackshaft9. Stroke Adjustment10. Position Sensors11. Close Coil12. Permanent Magnets13. Armature14. Open Coilp15. Manual Opening Actuator16. Mechanism Enclosure


AMVAC Circuit Breaker

M l i

Magnetic actuator

Manual opening mechanism

Auxiliary contacts Electronic controller

S f it hi

Electrical energy storage

Sensor for switching position detection


AMVAC vs. ADVAC

AMVAC’s simple design reduces moving elements and the need f tfor spare parts


AccessoriesRacking crank, manual close bar

Test cabinet

Test jumperTest jumper

Ground & test device

Electric racking device

Lift truck

Ramp

Shutter actuator truckShutter actuator truck

Breaker release handle

Wear test device

Dummy circuit breakers

Slow close device

IR Viewing PortsIR Viewing Ports


Arc Flash Mitigation RelaysREA 101 Arc Protection Relay

Fast trip time (< 2.5 ms)

Unique fiber optic sensor technology with self supervision

Current supervision for secure andCurrent supervision for secure and reliable arc detection

Easy to configure via front mounted dip switchesdip switches

Suitable for existing LV / MV switchgear installations or new applications

Minimize potential risk of injury or death while increasing reliability g y

Includes standard 12 year warranty


REA Application Example #1

Arc in the right bus compartment with the ptie breaker open

REA REA

Right REA 101 detects Right REA 101 detects light

REA101

REA101

govercurrent REA 101s send the current information to all connectedinformation to all connected unitsRight bus is disconnected

REA105

REA105

REA105

REA105


IR viewing Ports

SAFE: Successfully Arc-Flash tested in accordance with IEEE C37.20.7

RUDGGED: Certified by UL, SIRA and Lloyds of London for installation into both indoor and outdoorinto both indoor and outdoor equipment

FLEXIBLE: Broadband optic suitable f ll IR

1. Eliminate need to for all IR cameras.

SECURE: Unique mounting system allows for safe, single person

enter the switchgear while energized.

2. Frequent g pinstallation & retro-fitting with No dangerous internal fasteners required.

monitoring possible without impacting production.

3. Easy to use system requires little training


Product description

Applicable to any unshielded medium Indicator of voltage presenceinstalled directly on bus bars,

d t t

Advantages of VisiVolt™

voltage system – from 3 kV to 36 kVFor permanent installation – information on voltage presence available all the

conductors etc.

g ptimeOutdoor and indoor applicationGood visibility under all lightingGood visibility under all lighting conditionsMaintenance free; passive device – no power supply neededSimple and robust construction –resistant to overvoltagesg(does not use electronic elements)Very compact constructionEas to install


Easy to installEconomical solution

In SummaryAdvance & SafeGear available at 5 and 15kV

SafeGear arc-resistant switchgear – Types 2, 2B, 2C and 2BC –g yp , ,provide the highest level of personnel protection

AMVAC breaker100,000 mechanical operations mechanism

30,000 load break operations interrupter30,000 load break operations interrupter

Virtually maintenance free

REA RelaysREA RelaysProtects you personnel and equipment with the most advanced arc flash mitigation relays on the marketflash mitigation relays on the market.


ABB MV Switchgear Overview 2009 (NXPowerLite)

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Transcript of ABB MV Switchgear Overview 2009 (NXPowerLite)