abb mv switchgear overview 2009 (nxpowerlite)
TRANSCRIPT
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
© ABB Group May 4, 2009 | Slide 2
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.
© ABB Group May 4, 2009 | Slide 3
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
© ABB Group May 4, 2009 | Slide 4
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.
© ABB Group May 4, 2009 | Slide 5
Arcing Incidents Do Happen
Security Video of Arc flash incidentDistributed by NFPA
© ABB Group May 4, 2009 | Slide 6
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
© ABB Group May 4, 2009 | Slide 7
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
© ABB Group May 4, 2009 | Slide 8
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
© ABB Group May 4, 2009 | Slide 9
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
© ABB Group May 4, 2009 | Slide 10
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.
© ABB Group May 4, 2009 | Slide 11
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
© ABB Group May 4, 2009 | Slide 12
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
© ABB Group May 4, 2009 | Slide 14
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
© ABB Group May 4, 2009 | Slide 15
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
© ABB Group May 4, 2009 | Slide 16
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
© ABB Group May 4, 2009 | Slide 17
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
© ABB Group May 4, 2009 | Slide 18
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)
© ABB Group May 4, 2009 | Slide 19
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).
© ABB Group May 4, 2009 | Slide 20
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
© ABB Group May 4, 2009 | Slide 21
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
© ABB Group May 4, 2009 | Slide 22
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
© ABB Group May 4, 2009 | Slide 23
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
© ABB Group May 4, 2009 | Slide 24
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
© ABB Group May 4, 2009 | Slide 25
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
© ABB Group May 4, 2009 | Slide 26
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
© ABB Group May 4, 2009 | Slide 27
Arrangements
© ABB Group May 4, 2009 | Slide 28
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
© ABB Group May 4, 2009 | Slide 29
Certified by an independent test lab
SafeGear Demonstration
© ABB Group May 4, 2009 | Slide 30
Location of Flaps and Vents in SafeGear
ONE-HIGH 1200A 1200A W/2 VT UNITS TWO-HIGH 1200A
© ABB Group May 4, 2009 | Slide 31
1200A W/FUSED CPT 2000A W/1 VT UNIT ONE-HIGH 3000A
SafeGear Patented Internal Collection Chamber
© ABB Group May 4, 2009 | Slide 32
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
© ABB Group May 4, 2009 | Slide 33
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
© ABB Group May 4, 2009 | Slide 34
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
© ABB Group May 4, 2009 | Slide 35
Plenum End Flap
Flaps normally closedclosed
Opens with pressure i f f ltin case of arc fault
© ABB Group May 4, 2009 | Slide 36
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
© ABB Group May 4, 2009 | Slide 37
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
© ABB Group May 4, 2009 | Slide 38
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
© ABB Group May 4, 2009 | Slide 39
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
© ABB Group May 4, 2009 | Slide 40
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
© ABB Group May 4, 2009 | Slide 41
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
© ABB Group May 4, 2009 | Slide 42
AMVAC vs. ADVAC
AMVAC’s simple design reduces moving elements and the need f tfor spare parts
© ABB Group May 4, 2009 | Slide 43
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
© ABB Group May 4, 2009 | Slide 44
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
© ABB Group May 4, 2009 | Slide 45
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
© ABB Group May 4, 2009 | Slide 46
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
© ABB Group May 4, 2009 | Slide 47
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
© ABB Group May 4, 2009 | Slide 48
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 Group May 4, 2009 | Slide 49
© ABB Group May 4, 2009 | Slide 50