ABB MV Switch Gear Overview 2009c NXPowerLite

8/3/2019 ABB MV Switch Gear Overview 2009c NXPowerLite

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ABB GroupMay 3, 2012 | Slide 1

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

February 2008


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Arc-Resistant Standards

Introduction Todays Topics

What 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


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What is an Arc Flash?

The result of a rapid release of

energy due to an arcing faultbetween 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

surface temperature of the sun

(20,000C)

Light intensity more than 2000 times

that of normal office light

Volumetric expansion approximately

40,000+ - 1

Temperature of

the sun surface isabout 5000C.


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Arcing Incidents Do Happen

Fault characteristics

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 surfacetemperature of the sun (20 000C)

Light intensity more than 2000 times that of

normal office light


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Arc Flash Danger Statistics

Currently, OSHA lumps Arc Flash incidents in withelectrical incidents.

A recent survey showed that 5-10 people per day go toburn centers due to arc flash incidents that does notinclude 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 tohundreds of deaths a year

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


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Arcing Incidents Do Happen

Security Video of Arc flash incident

Distributed by NFPA


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Arc-Resistant Switchgear

Causes of internal arc faults

Improper maintenance, mechanical, and interlock

failures

Failure to follow procedures

Gradual component or insulation breakdown

Foreign objects, rodents, snakes, etc.

Effects of an internal arc fault Pressure increase in an enclosed compartment

Function of arc voltage, current, number, and duration

of arcs, volume

Rapid onset (10-15 ms) results in explosive forces

Thermal effects, hot gases Catastrophic to nearby personnel and equipment


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Evolution of Arc-Resistant Standards

Interest in Europe uninsulated bus was common

Annex AA to IEC 298 was approved in 1981

EEMAC G14-1 was published in 1987 in Canada

Type A arc-resistant construction at the front only

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

Type C arc-resistant construction at the front, back, and sides, and betweencompartments

IEEE C37.20.7-2007 includes Type 1 similar to EEMAC Type A above

Type 2 similar to EEMAC Type B above

Annex A addresses suffixes B and C

Type 1C Type 1, but also with arc-resistance designs or features betweenadjacent compartments

Type 2B Type 2 with LV instrument compartment door open relay andmaintenance 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


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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, Guide for Arc Flash Hazard Analysis

IEEE C37.20.7-2007, IEEE Guide for Testing Medium-Voltage Metal-Enclosed

Switchgear for Internal Arcing Faults


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Arc-Resistant Standards

Current Requirements and How They Apply

OSHA 29 Code of Federal Regulations (CFR) Part 1910, Subpart S Safe practices to prevent electrical shock or burns must be

implemented

Mandates that exposed workers must be qualified

Requires provisions for the appropriate personnel protective

equipment (PPE)

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

Details steps to comply with the OSHA requirements

Worker training

Appropriate, safe tools

Safety program

Arc flash hazard calculations

PPE

Equipment warning labels


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

Hazard/Risk Category for Arc-Resistant Switchgear

Applies to clearing times of


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Arc Flash Introduction - Mitigation Techniques

Redirecting energy away from workers

Reducing the arcing current (En ~Ia)

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

Increasing the working distance (E~1/D)

Using remore racking device, remote operating devicesincident energy might be reduced

Reducing the clearing time (E~t)

Zone selective interlocking

slow (100ms) + breaker operate time)

can not be used for retrofit installations

Bus bar protection expensive to install due to number of CTs

Light Detection


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ANSI C37.20.7 Accessibility Types 1

Front only

1C Front plus between compartments within a section or between adjacent

vertical sections (except main bus compartment)

2 Front, back, and sides

2B Isolation of the Low Voltage Compartment with the instrument door open

2C Front, back, and sides, plus between compartments within a section or

between adjacent vertical sections (except main bus compartment)

2BC Offers 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

Type 2, 2B, 2C and 2BC!


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Arc Faults

SafeGearConventional Switchgear


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Pressure Buildup

0

100

200

300

400

500

600

700

800

900

1 3 5 7 911

13

15

17

19

21

23

25 time (ms )

PSI

enclosure

rupture

Pressure measurements

vent flap

opens

Successful SafeGear test

SafeGear

conventional


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Introduction to ABB ANSI Switchgear

5 to 15 kV metal clad switchgear

Advance Traditional non-arc-resistant switchgear

SafeGear Meets ANSI Standard C37.20.7-2007 for arc-resistance

Four versions Types 2, 2B, 2C and 2BC available Vacuum circuit breakers

AMVAC Magnetically actuated mechanism

ADVAC Spring operated mechanism


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Ratings

Nominal Voltage4.16 7.2 13.8

BIL (kV) 60 95 95

Continuous Current (A) 1200 1200 1200

Main Bus 2000 2000 20003000 3000 3000

Forced Air Cooled* 4000 4000 4000

Short Circuit (kA) 20 20 20

K Factor = 1.0 25 25 2531.5 31.5 31.5

40 40 40

50 50 50

Ratings

4000 A rating available for Advance only.


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ABB Metal-Clad Switchgear

Features

Galvanic construction

Hem bending

Modular design

Bolted frame

Instrument compartment

Breaker compartment

Bus and cable compartment

Potential transformer compartment

Arc-resistant switchgear

SafeGear

Power distribution center

Plenum Circuit breaker technology

ADVAC

AMVAC magnetically actuated circuitbreaker option


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Galvanic Construction

Resistant to rust,corrosion and

scratches

No paint required

Highly reflective

(Side view with covers removed)


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Hem Bending

No sharp edges for

increased safety

Improved rigidity

Reduces arc propagation

Forms a self-supportingstructure

Hem bending creates a rigid structure and sturdy

construction in metal-clad switchgear (reinforced,

arc-resistant door construction shown).


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Modular Design

Bolted construction enables faster replacement and modification in thefield

Allows for easy replacements, repairs, and specialized configurations

Maintains the smallest, compact product


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Instrument Compartment

Total isolation from medium voltagecomponents

No instruments on breaker door

Galvanic interiors provide superiorreflectivity inside compartments

Available in four sizes

19, 38, 57, 95

Gasketed door

Easy accessibility for operators

Truck operated cell switches

located in the low voltagecompartment for easy access andto minimize exposure


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Breaker Compartment

Dual safety shutter actuators

Interlock prevents manualoperation

Mechanically forced by breaker

movement

Shutters grounded by cable

Clear Lexan shutters available

Position indicator

Connected

Test

Disconnected


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Breaker Compartment

Automatic secondary

disconnect Provides improved safety for

workers while operating the

breakers when using

SafeGear

Single or double plugsecondary contacts

Grounding contact

Interference block

Prevents installing undersizedbreakers


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Bus & Cable Compartments

Copper bus

Epoxy coated bus insulation system No sleeve insulation

Silver plating standard

Tin plating available

Porcelain or glass polyester standoff

insulators

Molded vinyl boots with re-useable

hardware

Catalog number embossed on eachboot to make reordering easy

No tape used


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PT Compartments

One to three potentialtransformers (PTs)

In SafeGear, less than 40kA dutyis 19 inches high. 40kA and 50kAduty is 38 inches high

Closed door racking in and outadds element of safety

Drawout construction withextension rails makes thecompartment easily accessible

Lift truck not required to replacefuses

Delrin snuffer contact technology


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CPT Compartments

15 kVA, single-phase, truck mounted

Larger size CPTs are fixed mounted in

the rear compartment

Fuse truck with fixed mounted CPT

Closed door racking adds element of

safety

Drawout construction with extension

rails makes the compartment easily

accessible for fuse replacement.

Compartment is 38 inches high

Lift truck not required to replace fuses Delrin snuffer contact technology


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Arrangements


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SafeGear Arc-Resistant Switchgear

Enhanced safety for personnel and

equipment

Flap/vent system to relieve pressure

Patented collection chamber

Gases are safely expelled out the roof

through the plenum

Built to EEMAC G14-1 1987 type B andC construction and IEEE C37.20.7-2007

Types 2, 2B, 2C and 2BC

More than 25 years experience in arc-

resistant switchgear

Design allows for flexibility in

configurations and promotes superior

safety performance

Certified by an independent test lab


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SafeGear Demonstration


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

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

Location of Flaps and Vents in SafeGear


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SafeGear Patented Internal Collection Chamber


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SafeGear Construction

Breaker doors secured with heavy

duty hinges and bolts Multi-point handle and latching

available

Double thickness of steel

Gasketed construction Seals gases inside

Lexan arc-resistant window

largest in industry allows the

operator to check position and

status of circuit breaker withoutopening the cell door


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Plenum Benefits

Channels gases out of PDC

Provides room for flap operation

Allows gases to expand

Protects cable trays

Maintains weather protection

Allows lower building height

Plenum

PDC ceiling

PDC Aisle

Two-high SafeGear


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Plenum Design

Sealed duct across top of switchgear, covering all vent flaps

Sized 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


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Plenum End Flap

Flaps normally

closed

Opens with pressure

in case of arc fault


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Circuit Breaker

Closed door racking to all positionsadds element of safety

Three position breaker Positive stop in all positions

Breaker positively latched in thecompartment (Disconnect)

Racking mechanism is integral to the

breaker element Auxiliary switches are breaker-mounted

and wired out through the secondarydisconnect, eliminating the need forseparately mounted mechanismoperated cell switches

Front access mechanism

Centered racking mechanism for easyalignment

Embedded pole design


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ADVAC Circuit Breaker

Manual open and

close push buttons

Non-re-settable

operations counter

Open/close indicator

Racking access port

Manual spring

charge port

Spring charge

status indicator

Cell locking tabs

and handles

Racking release lever

Racking padlock provision for

lockout and safety procedures


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ADVAC Circuit Breaker

Precision cam

On-board auxiliary contacts

eliminate the need for cell-

mounted MOC switches and

related mechanical linkages 4a, 4b standard 9a, 8b optional

Auxiliary switch

operating shaft

Main drive shaft

Charging

motor

Toroidal

spring

Close &

trip coils

Simple, front-accessible operating mechanism

and control components


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AMVAC Circuit Breaker

Operating mechanism rated for100,000 operations

10 times ANSI requirement

Interrupter assemblies rated for30,000 full load operations

Virtually maintenance free (minorlubrication needed)

Only seven moving parts

90% less parts

Permanent magnet for holding forceand latch

Dual capacitors store energy Full operation for up to 90 seconds

after loss of control power

Interchangeable with ADVAC


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AMVAC Circuit Breaker 1. Upper Primary Terminal

2. Vacuum Interrupter3. Epoxy Potting Compound

4. Lower Primary Terminal

5. Flexible Connector

6. Wipe Springs

7. Insulated Pushrod

8. Jackshaft

9. Stroke Adjustment

10. Position Sensors

11. Close Coil

12. Permanent Magnets

13. Armature14. Open Coil

15. Manual Opening Actuator

16. Mechanism Enclosure


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AMVAC Circuit Breaker

Manual opening

mechanism

Auxiliary contacts

Sensor for switching

position detection

Magnetic actuator

Electronic controller

Electrical energy storage


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AMVAC vs. ADVAC

AMVACs simple design reduces moving elements and the needfor spare parts


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Accessories Racking crank, manual close bar

Test cabinet

Test jumper

Ground & test device

Electric racking device

Lift truck

Ramp

Shutter actuator truck

Breaker release handle

Wear test device

Dummy circuit breakers

Slow close device IR Viewing Ports


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Arc Flash Mitigation Relays

REA 101 Arc Protection Relay

Fast trip time (< 2.5 ms)

Unique fiber optic sensor technology

with self supervision

Current supervision for secure and

reliable arc detection

Easy to configure via front mounteddip switches

Suitable for existing LV / MV

switchgear installations or new

applications

Minimize potential risk of injury ordeath while increasing reliability

Includes standard 12 year warranty


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Arc in the right bus

compartment with thetie breaker open

Right REA 101 detectsovercurrent

Right REA 101 detects light

REA 101s send the current

information to all connected

units

Right bus is disconnected

REA Application Example #1

REA

101

REA

101

REA

105

REA

105

REA

105

REA

105


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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 outdoor

equipment

FLEXIBLE: Broadband optic suitablefor all IR cameras.

SECURE: Unique mounting system

allows for safe, single person

installation & retro-fitting with No

dangerous internal fasteners

required.

1. Eliminate need toenter the switchgear

while energized.

2. Frequent

monitoring possible

without impacting

production.3. Easy to use system

requires little

training


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Product description

Applicable to any unshielded medium

voltage system from 3 kV to 36 kV

For permanent installation information

on voltage presence available all the

time

Outdoor and indoor application

Good visibility under all lighting

conditions

Maintenance free; passive device no

power supply needed

Simple and robust construction

resistant to overvoltages

(does not use electronic elements)

Very compact construction

Easy to install

Economical solution

Indicator of voltage presence

installed directly on bus bars,

conductors etc.

Advantages of VisiVolt

I S


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In Summary

Advance & SafeGear available at 5 and 15kV

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

AMVAC breaker

100,000 mechanical operations mechanism

30,000 load break operations interrupter

Virtually maintenance free

REA Relays

Protects you personnel and equipment with the most advanced arcflash mitigation relays on the market.


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ABB MV Switch Gear Overview 2009c NXPowerLite

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