Circuit Breakers – Are You Protected?
•
Advancements over last 10
years
•
Safety Influences
•
Governing Codes and
Standards Influences
Confidential & Preliminary
Circuit Breaker Advancements
•
Global Application
•
Modular and Flexible
•
Easy to Use
•
Drop in Accessories
Confidential & Preliminary
Siemens VL: Space Saving
The VL 250A Frame is 40%
Smaller than our traditional
Sentron breakers…
…and 8% smaller
than our
competitors newer
breaker
FD
FG
Compact frame sizes allow for reductions in
equipment size and cost
Siemens VL: Modular and Cost Saving
Fully interchangeable trip units promote quick and easy
upgrades from Thermal-Magnetic to Electronic Trip Units
Siemens VL: Drop in Accessories
• Pockets in cover housing isolate
internal accessories from main contacts
• “Click in place” components in every module
Safety
Ss
Arc Fault
One-Pole Combination AFCI
Two-Pole Combination AFCI
Dual Function AFCI
Intelli-Arc Diagnostic Tool
© Siemens AG 2007 - Änderungen vorbehalten
Why focus on AFCI?
It’s all about safety
 U.S. Fire Administration annual estimates:
 67,800 fires
 485 deaths
 2,300 injuries
 $868 million in property losses
It’s required
 NEC 2005 – requires combination arc faults on bedroom circuits
 NEC 2008 – requires combination arc faults on all dwelling areas
 NEC 2014 – requires both arc fault and ground fault protection on
kitchen and laundry circuits
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LEDs
If top LED lights
up: arc fault
If both LEDs light
up: line-to-ground
arcing
If no LEDs light
up: short circuit or
overload
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CAFCI Single Pole Size Difference
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2-Pole AFCI
Why focus on 2-Pole AFCI?
 Exclusive product
 Savings opportunity for customer
(less wire with “shared neutral”)
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Dual Function AFCI
Combines AFCI and GF in one device
 Effective June 29, 2015 – UL 943
 Auto-Monitoring (Self-Test)
 End of Life (Lockout)
 INCLUDED NOW!
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Intelli-ArcTM Diagnostic Tool
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BUT, doesn’t a tester already exist?
Intelli-Arc is NOT a TESTER!
 Diagnoses the cause of an undesired AFCI trip
 Saves your contractors time and money!
This is NOT a TESTER either
 May or may not make an AFCI trip
 Can only produce limited simulated arcs
 Many which “look” like household appliances to
an AFCI
 Not endorsed by UL or any NEMA manufacturer
The push to test button remains the ONLY way to test
whether or not an AFCI is functioning properly
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Time Current Curves
Sample
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Typical Condition
2000A Main, 800A Distribution, 200A Panel, 20A Branch
WL
JD
A
NGB 20 A
WL 800 A
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Typical Condition
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Let’s fix the problem with fuses!
Bussmann J Class 100A Low Peak
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Possible Solution
Bussmann J Class 100A Low Peak
No
overlap
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Arc Flash Discussion
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NEC2014 – Article 240.87 Arc Energy Reduction
• 1) Zone-Selective Interlocking
• 2) Differential Relaying
• 3) Energy reducing maintenance switch/local indicator
• 4) Energy reducing active arc flash mitigation system
• 5) An approved equivalent means
•
•
Mitigation
Avoidance
Arc Flash Discussion
Arc Flash Discussion
Arc Flash Discussion
Arc Flash Discussion
Arc Flash Discussion
Competitive ARMS feature
Arc Flash Discussion
Arc Flash Discussion
Arc Flash Discussion
Q&A?
Arc Flash Discussion
Arc Flash Discussion
http://www.missioncriticalmagazine.com/articles/86855-not-all-low-voltage-switchgear-is-created-equal
Arc Flash Discussion