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V ESW Brasil 2011 Seminrio Internacional de Engenharia
Eltrica na Segurana do Trabalho
So Paulo 8 a 10 de novembro Holiday Inn Parque Anhembi
Innovative Techniques for
Mitigating Arc Flash Exposure
David Shipp
Eaton Corporation Electrical Sector
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
ABSTRACT
As more and more industry addresses arc flash electrical
safety concerns, they are discovering high risk associated with
what used to be normal maintenance tasks. In many cases,
the excessively high arc flash incident energies make it so all
maintenance must be done with equipment de-energized not always acceptable to the process industries. This paper will
address the multiple ways the authors have devised to
significantly lower arc flash incident energy exposure by new
system design and products, retrofits, retro-fills, equipment
modifications, alternate protection settings, etc. In most
cases, NFPA 70E Hazard Risk Category 2 or lower can be
obtained. Several real world examples will be discussed.
.
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2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
DEVELOPMENTS LEADING TO NFPA 70E
Large Hydro in Pacific NW
6.9kV Switchgear
Racking in Breaker
AF occurred
One worker injured
4+ years, $10+ million
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2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
NFPA 70E METHODS FOR SELECTING
PROTECTIVE CLOTHING AND PPE
NFPA 70E-2004 Table 130.7(C)(11) Protective Clothing Characteristics
Hazard Risk
Category
Clothing Description (Typical number of clothing layers is given in parenthesis)
Required Minimum Arc Rating of PPE [J/cm2(cal/cm2]
0
Non-melting, flammable materials (i.e., untreated cotton, wool, rayon, or silk, or blends of these materials) with a fabric weight at least
4.5 oz/yd2 (1)
N/A
1 FR shirt and FR pants or FR coverall (1) 16.74 (4)
2 Cotton underwear conventional short sleeve and brief/shorts, plus FR shirt and FR pants (1
or 2) 33.47 (8)
3 Cotton underwear plus FR shirt and FR pants
plus FR coverall, or cotton underwear plus two FR coveralls (2 or 3)
104.6 (25)
4 Cotton underwear plus FR shirt and FR pants
plus multilayer flash suit (3 or more) 167.36 (40)
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2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 5
INTRODUCTION
Too Much PPE is Just
as Bad as Not Enough!
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
PROTECTIVE CLOTHING AND PPE FOR
ARC FLASH
Multi-Layering Testing
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2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Specialized Arc Flash Protective Equipment
Flash Suits / Switching Coats
Two-Layer Flash Suit,
ATPV = 42 cal/cm2
Use: Hazard/Risk Category 4
PROTECTIVE CLOTHING AND PPE FOR
ARC FLASH
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2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
REDUCING ARC FLASH HAZARDS
Need a Total System
Solution Approach
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2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
SOLUTIONS THAT REDUCE ARC
FLASH INJURIES AND DAMAGE
Label Equipment & Train Personnel
Minimize Risk with Good Safety Practices
Reduce Available Fault Current
Faster Clearing Time
Move People Further Away
Redirect Blast Energy
Prevent Fault
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2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 10
ARC FLASH SOLUTIONS
Bypass Isolation A.T.S. Arc Flash Reduction Maintenance
System for new and old (Retrofit
Kits) installations (LV and MV)
Arc Resistant MV Motor Starters MV and LV Arc Resistant Switchgear Bus Differential Schemes MV and LV Zone Selective
Interlocking
Current Limiting Reactors LV/MV Remote Racking Hi (or Low) Impedance Transformers MV / LV HRG Systems AF Power System Studies Insulated Bus in Switchgear
Infra-Red Windows Kirk Key Interlock Systems MCC Bucket & Safety Switch Viewing
Windows MCC Bucket Retrofits Partial Discharge Systems Infra-Red Sensors in Hi AF Areas
(Dont Have to Remove Covers) AF Tested Current-Limiting MCCBs Remote Monitoring, Control and
Diagnostics LV/MV Remote Operators Arc Mitigator Light Detection
Tripping (MV and LV) AFL System (No Main 2ndary
Breaker)
Examples of Arc-Flash Solutions:
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
REDUCING ARC FLASH HAZARDS
Label Equipment
Train People
Wear PPE
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2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Engineering Studies Arc Flash Analysis
Arc Flash Studies Standardized Data Collection
Templates
Power Systems Engineers
Labels, Training,
Recommendations
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2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Provides guidance for the calculation of incident energy and arc flash protection
boundaries.
It presents formulas for numerically quantifying these values.
The IEEE 1584 Guide also includes an Excel Spreadsheet Arc-Flash Hazard Calculator which performs the actual calculations using the formulas stated
in the Guide.
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IEEE 1584-2002: Guide for Performing Arc Flash Hazard Calculations
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Personal Protective Equipment (PPE)
Cumbersome Hot Reduces Mobility Increases Fatigue
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2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Arc-Flash Safety for electricians, technicians or equipment operators whose employers have
already declared them to be "qualified" according
to OSHA rules but need to be recycled or be
updated with any new revision of NFPA 70E
Electrical and Arc-Flash Safety for electricians, technicians and equipment operators who are not
"qualified" but who might be exposed to arc-flash
hazards
Understanding Arc Flash for engineers, safety managers, consultants and electricians
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Recommended Training
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Minimize Risk with Good Safety Practices
De-Energize Equipment versus Working It Live unless increased hazards exist or infeasible due
to design or operational limitations.
Switching remotely (if possible)
Closing and tightening door latches or door bolts before operating a switch.
Standing to the side and away as much as possible during switching operations.
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Practical Methods for Reducing
Arc Flash Hazards
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 17
Minimize Risk with Good Safety Practices
Bad Exposed Back of Neck Good All of Body Protected
Practical Methods for Reducing
Arc Flash Hazards
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
INTRODUCTION
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2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 19
Reduce Available Fault Current
(Reduce Incident Energy)
Reducing Arc Flash Hazards
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 20
Lowering Isc Does not Always Lower Incident
Energy
Fuse vs Breaker
No 1 Single Answer
Must Do Arc Flash Study
Reducing Incident Energy
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
HRG Units
Typically Under 5 Amps
Pulsing Contactor
Many Options
LV or MV
Does Not Preclude PPE
Lowers Probability of Accident
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High Resistance Grounding (HRG)
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 23
Faster Clearing Time
(Reduce Incident Energy)
Reducing Arc Flash Hazards
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Neither circuit breaker calculation method accounts for
their current-limiting effects.
Neither based on any actual circuit breaker test data.
SIMPLE method is based upon worst case time of 4 manufacturers time/current curves. VERY conservative!
ALTERNATE method requires
manufacturer specific time/current curve
input.
Concerns with ALTERNATE method too because circuit
breaker time/current curves are very conservative in their
instantaneous region.
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LV Circuit Breakers Issues with IEEE 1584
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 25
MCCBs Arc Flash Performance Comparison
Apply Current-Limiting Molded-Case Circuit Breakers
Min Mid Max
225 A MCCB with Thermal-Magnetic Trip Unit
Bolted fault current 3.4 kA 35 kA 100 kA
Inc. Energy via IEEE 1584 Table E.1 Generic (Cal/cm2) N/A
1 1.7 4.7
Inc. Energy via IEEE 1584 & Trip Curve (Cal/cm2) 59.6 1.1 2.3
Measured Incident Energy (Cal/cm2) 0.08 0.1 0.11
1200 A MCCB with Electronic Trip Unit
Bolted fault current 20 kA 35 kA 100 kA
Inc. Energy via IEEE 1584 Table E.1 Generic (Cal/cm2) N/A
1 3.5 9.4
Inc. Energy via IEEE 1584 & Trip Curve (Cal/cm2) 218 3.5 5.8
Measured Incident Energy (Cal/cm2) 1.86 1.2 1.64
Incident Energy at
Bolted Fault Current
IEEE 1584 Generic Equation
IEEE 1584 Using Time Current Curve Input
Tested Value
1 N/A = Not Applicable
because it is outside the
range of the IEEE 1584
Generic Equation
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
This is only a first step in making MCCB recommendations for arc flash applications.
It is much easier for novice users to understand the needed PPE, rather than a
caloric energy value.
Its important and necessary to have arc flash application recommendations for MCCBs.
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Comments about MCCB Application Arc Flash Performance
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Zone Selectively Interlocked LV Power Circuit Breakers
provide significantly lower Arc Flash energy values:
Testing confirms that a LV Power Circuit Breaker
(4000A maximum) require Category 2 PPE (8 cal/cm2)
with proper instantaneous settings
During maintenance it is recommended to temporarily adjust
the Instantaneous and Ground Fault (if available) trip
settings to their lowest value
Unless a Low Voltage Power Circuit Breaker
operates in the Instantaneous trip mode, the
arc flash energy values will require Category
3 PPE or greater
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LV Power Circuit Breakers
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Bus Differential (87B)MV or HV
Zone Selective Interlocking a Control approach / Form of 87B MV and LV
Arc Mitigator Light (Current) Detection Systems for MV and LV Switchgear and
Controlgear
Current Limiting Fuses*
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High Speed Clearing
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
SD=
0.5S
SD=
0.3S
SD=
0.3S
SD=
0.3S
M1
F1 F2 F3 X
35kA fault current
Without ZSI = 0.5 S:
43.7 Cal/cm2
Greater than Cat. 4 PPE
DANGER!
With ZSI = 0.08 S:
7.0 Cal/cm2
FR Shirt & Pants
Cat. 2 PPE
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Zone Selective Interlocking (ZSI)
Explanation:
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
An Off-Shore Oil Platform in the Gulf of Mexico lowered their Incident Energy Exposure from
85 calories down to 12.7 calories by retrofitting
their 480 V Switchgear with ZSI.
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Zone Selective Interlocking (ZSI)
Example:
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Door Mounted Components
Breaker Mounted Components
Arc flash Reduction
Maintenance System
DIGITRIP
Harness
Lockout
Switch
Battery
Indicating
Light
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Arc Flash Reduction Systems Retrofit of LV PCBs
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
An external over-ride switch and circuitry are
connected to a breakers trip unit, and is adjustable between 2.5X - 10X.
When a person wants to perform maintenance,
they close the switch, which automatically over-
rides all of the delay functions, and causes the
breaker to trip without any intentional delay
whenever a fault is detected. Use its lockout
features for normal lockout tag-out procedures.
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Arc Flash Reduction Systems Retrofit of LV PCBs
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Upon completion of the maintenance, the lock is
removed, the switch is manually opened, and all
previous trip unit settings are again re-activated,
without need for recalibration.
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Arc Flash Reduction Systems
for LV PCBs
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Overflow Sump Pump Location
Recommendation (Acceptable)
C0-5: XFMR protection Main and FDR: Coordination
Hazard Risk Category
= HRC = Danger (>40 Cal.)
AF Current = 5.6kA
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Example: Existing Equipment
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Overflow Sump Pump Location
Recommendation (Good)
C0-5: TXMR protection Main and FDR: Coordination New Equipment (Better)
Replace C0-5 w/ DT3000 Replace FDR trip w/ DigiTrip RMS 610, LSI trip unit.
Arc flash Reduction System (Best)
Replace C0-5 w/ DT3000 Replace FDR trip w/ DigiTrip RMS610, LSI trip unit & Arcflash Reduction
Maintenance Switch.
Replace Main with Digitrip 610 LS & Arc flash Reduction Maintenance Sw.
HRC = 1 (< 4 cal/cm2) AF Current = 5.6kA 35
Arc Flash Reduction Systems Example
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
High Avail Fault Current
Digitrip610 & Arc flash Reduction System
Normal settings HRC=3 (10.7 cal)
With Arc flash Reduction System: HRC= 1 (2.2 cal)
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Arc Flash Reduction Systems Example for High Available Fault Current
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
2000 A fuses supplying 480V Glass Furnaces
Incident Energy =61 Cal / HRC=Danger
Retro-filled fuses with LV Power Circuit Breakers
35 cal with trip Unit/6 cal with New Breaker + Built-in Arc
Flash Reduction System
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Arc Flash Reduction Systems Retro fill Example
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 38
Arc Flash Reduction Systems Example of replacement of old LVPCB
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Has 5 user-selectable levels of protection to choose
maximum protection, while
avoiding nuisance tripping
Blue color LED indicating Maintenance mode
Can be remotely activated through IR communication
with PDA
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Arc Flash Reduction Systems Example of Integrated Trip Unit
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Computer Room PDU (Bypass Mode)
Thermal-Magnetic breaker HRC = 4 Due to Long Time
Replaced with Electronic Trip Breaker HRC = 1
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Change to Electronic Trip Units
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Multiple Settings Groups
Similar to LV maintenance
switch, only for MV applications
Used to reduce the trip delay of
medium-voltage relays while
maintenance is being performed
on equipment.
Requires relay with multiple
settings groups capability
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Practical Methods for Reducing Arc
Flash Hazards
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Switch
Indicating Light
m-Processed
Relay
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Arc Flash Reduction using m-Processed Relay with Group Settings
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 43
Network Protectors
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 44
Network Protectors
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 45
Network Protectors
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 46
Network Protectors
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 47
Network Protectors
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 48
Network Protectors
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 49
Network Protectors
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Any Exposure / Racking Feeder Circuit-Breakers Must be Cleared by Primary
Fuse
100 Cal Exposure
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Substations without Main Secondaries
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
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Substations without Main Secondaries
Arc Flash reduction by Retrofit
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Primary Fuses Only: 594 calories
Primary Circuit-breaker Only: 289 calories
Primary Circuit-breaker + Arc Flash Reduction System:
7.5 calories
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Substations without Main Secondaries
Arc Flash reduction by Retrofit
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Retrofill Primary Fuse with Vacuum Circuit-breaker
Sense at 480V Transformer side Trip Primary
Use Protective Relay with Group Settings
Many Variations
Must Meet ANSI C37.59
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Substations without Main Secondaries
Arc Flash reduction by Retrofit
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 54
Substations without Main Secondaries
Arc Flash reduction by Retrofit
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 55
Substations without Main Secondaries
Arc Flash reduction by Retrofit
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Safety by Design: Improved Unit Substation Design
Line
LA
CPT
Load
CTs
Snubber
Bkr
Typical LV Unit Substation with Vacuum Breaker in MSB (Medium Voltage Switch over Breaker) Assembly
25H X 20W X 18 D, 330 lbs
ANSI C37.20 rated at 25 and
40kA
600, 1200 and 2000A ratings
Integral trip unit with linear trip
actuator
2-step stored energy
mechanism
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Substations without Main Secondaries
Arc Flash solution for new installation
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
XXPXXX-90PXXX-P1,P2,P3,P4
4-3/C, #500kcmil
600V, TC, XHHW-2, W/GND
XXPXXX-L1,L2,L3
CABLE TRAY
100 FEET
XXPXXX-90PXXX-P1,P2,P3,P4
4-3/C, #500kcmil
600V, TC, XHHW-2, W/GND
XXPXXX-L1,L2,L3
CABLE TRAY
100 FEET
XXPXXX-90PXXX-P1,P2,P3,P4
4-3/C, #500kcmil
600V, TC, XHHW-2, W/GND
XXPXXX-L1,L2,L3
CABLE TRAY
100 FEET
XXPXXX-90PXXX-P1,P2,P3,P4
4-3/C, #500kcmil
600V, TC, XHHW-2, W/GND
XXPXXX-L1,L2,L3
CABLE TRAY
100 FEET
LV Swgr Elevation Substation One-Line
VCB
ZSI ZSI ZSI ZSI
ZSI
50 51
50 51
(3) 600:5 CT
(3) 3200:5 CT
(3) 3200:5 CT
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Safety by Design: Improved Unit Substation Design
Substations without Main Secondaries
Arc Flash solution for new installation
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 58
Light Detection System Arc Flash reduction for MV Switchgear
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 59
Light Detection System Arc Flash reduction for MV Switchgear
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
REDUCING ARC FLASH HAZARDS
Move People Further Away
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2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Remain physically outside the flash protection boundary.
Therefore NO ARC FLASH HAZARD protection required.
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Arc Flash Reduction Remote Racking of MV CB 5/15/27/38 kV Switchgear
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
VS.
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Arc Flash Reduction Remote Racking of MV CB 5/15/27/38 kV Switchgear
X
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Without With
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Arc Flash Reduction Remote Switching (Chicken Switch)
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Accessory for Remote Operation of Isolation Switch: Increased Operator
Safety.
Temporarily mounts to front of Starter door equipped with mounting
provisions.
Operation by Control Station connected to Motor Operator via 25-
foot Cable.
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Arc Flash Reduction Remote Operation of Isolation Switch
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 65
Arc Flash Reduction Motor Operated Isolation Switch
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
REDUCING ARC FLASH HAZARDS
Redirect Fault Energy
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2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Redirects Arc Energy and Particulates
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Arc Resistant Switchgear
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Arc Flaps
2000A or 3000A
breaker with Vent
1200A can be 1
high or 2 high
Control
Section
VT drawer
Manual Close/Open Push
Buttons 68
5/15 kV Arc Resistant Switchgear
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Test @ 65kA / 508V
Arc initiated in breaker
compartment
Plenum Design
March 2008 - PASS
Arc out-gassing through
plenum
No arc flash out of the
front of the gear
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LV Arc Resistant Switchgear Testing
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
REDUCING ARC FLASH HAZARDS
Prevent Fault
70
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section 71
LV MCC Racking buckets with front door closed
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Bucket Position
Connected
Test
Withdrawn
Handle Mechanism
Device Island
Start, Stop, Auto, Man
Unit Latch
Breaker
Internal Shutter Position
Open
Closed
Racking Tool Receiver
Starter
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LV MCC Withdrawable units with increased safety features
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Racking Tool
Receiver: 3/8 Square
Internal Shutter
Position:
Open/Closed
Bucket Position:
Connected/Test/Disconnected
Stab Positive
Position Indicator:
With lockout tag out
hole
Breaker Operator
Test Position Block:
Phase Voltage,
Control, voltage,
Ground 73
LV MCC Withdrawable units with increased safety features
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
DC Motor Wireless Option
Attaches Easily
Minimal Torque Required
25 Foot Pendant Station
It should interfaces with other
Remote Racking Systems
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LV MCC Racking buckets with front door closed
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Infrared Scanning Windows for LV/MV Assemblies
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Safety Related Solutions
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
Monitoring connecting joints on a PDU, utilizing
Plastic Bracket System
Monitoring Individual Connections
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Continuous Thermal Monitoring
2011 IEEE The Institute of Electrical and Electronics Engineers, Inc. - Industry Applications Society - South Brazil Section
QUESTIONS?
82
V ESW Brasil 2011 Seminrio Internacional de Engenharia
Eltrica na Segurana do Trabalho
So Paulo 8 a 10 de novembro Holiday Inn Parque Anhembi
Thank you!
David Shipp
Eaton Corporation Electrical Sector