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Selective Coordination

Selective Coordination. Productivity Through Protection Seminar Series. Agenda. Selective Coordination What is selective coordination Mandatory Requirements Why mandatory How to comply with fuses Benefits of fusible system Cooper Bussmann solutions Resources. LINE SIDE. KRP-C-1200SP.

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Selective Coordination

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  1. Selective Coordination Productivity Through Protection Seminar Series

  2. Agenda Selective Coordination • What is selective coordination • Mandatory Requirements • Why mandatory • How to comply with fuses • Benefits of fusible system • Cooper Bussmann solutions • Resources

  3. LINE SIDE KRP-C-1200SP LOAD SIDE LPS-RK-600SP What is Selective Coordination • For the full range of possible overcurrents • Only closest upstream overcurrent protective device from overcurrent opens • Other upstream (larger) overcurrent protective devices do not open Fault Only this fuse opens

  4. Selective Coordination (NEC®) Article 100 Definition Article 700 Emergency Systems Coordination (Selective) Localization of an overcurrentcondition to restrict outages to the circuit or equipment affected, accomplished by the choice of overcurrent protective devices and their ratings or settings. 700.27 Coordination. Emergency system(s) overcurrent devices shall be selectively coordinated with all supply side overcurrent protective devices (Two exceptions apply for 700.27 and 701.18) (Wording for 701.18 and 708.54 is the similar except for the type system)

  5. Without Selective Coordination With Selective Coordination Loads Unnecessarily Blacked Out No Unnecessary Load Blackouts Selective Coordination System Prospective OPENS NOT AFFECTED Opens Fault Fault Not Affected Unnecessary Power Loss

  6. D 100A 100A 45A 45A 0.1s 0.01s Lack of Selective Coordination • Many people mistakenly assume that a lower ampere rated fuse will always open before a larger ampere rated fuse • If fuse curves cross, larger upstream fuse and downstream fuse can both open for overcurrents on the loadside of 45A fuse (not selectively coordinated)

  7. 800 800A 200 200A 30 X 30A X 0.1 0.01 Lack of Selective Coordination • Many people mistakenly assume that a lower ampere rated circuit breaker will always open before a larger ampere rated circuit breaker • Where the circuit breakers cross, it is interpreted to not be selectively coordinated See

  8. With Selective Coordination No Unnecessary Load Blackouts Selective Coordination System • To achieve selective coordination for electrical systems requires engineering analysis and proper overcurrent protective device selection • For most electrical systems, selective coordination is a desirable design consideration • For some electrical systems, selective coordination is mandatory (limited number of building types and then usually only few circuits) OPENS NOT AFFECTED Fault

  9. Summary of Requirements: Selective Coordination Selective Coordination requirements • 100 Definition: Coordination Selective (2005) • 517.26 Required for Essential Electrical Systems (2005) • 620.62 Required for Circuits with multiple Elevators (1993) • 700.9(B)(5)(b) Exception. OCPDs permitted at alternate source or for equipment (2008) • 700.27 Required for Emergency Systems (2005) • 701.18 Required for Legally Required Standby Systems (2005) • 708.54 Required for Critical Operations Power Systems (COPS) (2008)

  10. Selective Coordination Requirements Why? • Increases system reliability to deliver power • Focus on the load! Availability of power to vital loads as long as possible • Life Safety • Public safety and national security (COPS) • Increases system reliability to power vital loads even during emergencies and disasters • Facilitates restoration of power to affected loads Fault NOT AFFECTED OPENS

  11. Selective Coordination Includes the Entire Circuit Path, Thru Both Sources Alternate Source Normal Source • From a vital load to the alternate source, the OCPDs shall be selectively coordinated ATS N E Panel

  12. Selective Coordination Includes the Entire Circuit Path, Thru Both Sources Alternate Source • From a vital load to the alternate source, the OCPDs shall be selectively coordinated • For a vital load to the normal source main, the OCPDs shall be selectively coordinated Normal Source ATS N E “Emergency system(s) overcurrent devices shall be selectively coordinated with allsupply side overcurrent protective devices” This wording is inclusive of the the normal source path OCPDs Panel

  13. Selective Coordination Requirements • NEC® 620.62 Elevator Circuits (since 1993) • Requires selective coordination on circuit paths when multiple elevators are on a feeder. Required since 1993 to ensure safety of human life especially during emergency egress • Purpose of this requirement? • Maximize continuity of service • Quicker restoration of power

  14. How to Selectively Coordinate with Fuses? Let’s take a look at what it takes to selectively coordinate fuses

  15. 1200A Fuse Melting LINE SIDE KRP-C-1200SP Tm Tc AVAILABLE SHORT-CIRCUIT CURRENT LOAD SIDE LPS-RK-600SP 600A Fuse Clearing Tc Selective Coordination- Fuses 1200A fuse melting energy must be greater than 600A fuse clearing energy

  16. Selective Coordination (SPD p112) Load Side Fuse No plotting required! Line Side Fuse LOW-PEAK® : LOW-PEAK® 2:1 Line:Load Ratio

  17. Fuse Selectivity Ratio Example 1 Circuit Path Selectively Coordinated Loadside Fuse Low-Peak® KRP-C-800SP Lineside Fuse Low-Peak LPJ-400SP Low-Peak LPJ-100SP 800/400 = 2:1only 2:1needed Selective Coordination achieved 400/100= 4:1 only 2:1 needed Selective Coordination achieved between these two fuses Overloads or faults of any level up to 200,000A

  18. Fuse Selectivity Ratio Example 2 • What about branch panelboard applications, such as lighting? • Use the Quik-Spec™ Coordination Panelboard Low-Peak KRP-C-800SP Low-Peak LPJ-200SP Low-Peak CUBEFuse TCF20RN Branch circuits: CCPB disconnect with CUBEFuse

  19. Benefits of Fuse Selective Coordination It is simple with Cooper Bussmann fuses • Just follow the fuse selectivity ratios: 2:1 for Low-Peak® Fuses • No need to do complex short-circuit current studies (up to 200kA) • No need to plot time-current curves to analyze fuse selective coordination: use the selectivity ratios • In addition: • High interrupting rating • Excellent current-limitation • Excellent protection of components • Arc flash mitigation

  20. Selective Coordination Cooper Bussmann Fuses • Recommend design: • TCF(amp)RN CUBEFuse® 1 to 60A (Branch Panel) • LPJ(amp)SP Class J 1 to 600A • LPS-RK(amp)SP Class RK1 1 to 600A LPN-RK(amp)SP • KRP-C(amp)SP Class L 601 to 6000A CUBEFuse TCF(amp)RN LPJ(amp)SP KRP-C(amp)SP LPS-RK(amp)SP

  21. Quik-Spec™ Product Family

  22. The New Standard in Fusible Panelboards • Simplifies Selective Coordination • Better Value • Smaller Footprint • Additional Main Options • Patented Fuse Rejection, Interlock and Indication

  23. Quik-Spec™ Coordination Panelboard Callouts 600Vac / 200A w/ Fusible &Non-Fusible Main or MLO50kA, 100kA & 200kA SCCR Isolated or Non-Isolated Ground Option200A or 400A Neutral OptionFeed-Through & Sub- Feed Through Lugs OptionNEMA 1 & 3R Surface and flush mount Top and bottom feed Door-in-door options 20” width x 50” to 60½” height x 5 ¾” depth Single “QSCP” Part Number 18, 30 & 42 Branch Circuit Positions w/ Space Options Available Finger-safe CUBEFuse® CCPB for Branch Circuit Protection Up to 60A Branch Circuits & 1-, 2-, 3-pole options Removable Branch Knockouts Spare Fuse Holder w/ Spare Fuses Included w/ Each Panel Advance Shipment of Cans Available 20”

  24. CUBEFuse® CCPB Branch Details • Compact Circuit Protector Base (CCPB) • UL Listed fusible branch disconnect (1-, 2- & 3-pole) • Ampacity-rejection prevents overfusing w/ breaks at 15A, 20A, 30A, 40A, 50A & 60A • Interlock prevents fuse removal while energized • Bolt-in design for quick installation to bus • Local open fuse indication on CCPB base • Lockout/Tagout provisions • Lock-On provisions • Low-Peak® CUBEFuse® Benefits • IP20 finger-safe • Smallest footprint of any power class fuse on the market • Meets Class J time-delay electrical performance for UL/CSA • 600Vac voltage rating • UL Listed 300kA interrupting rating • Up to 200kA assembly SCCR rating • Reduces arc-flash hazards and minimizes damage to equipment and circuits when sized properly • Optional easyID™ open fuse indication Safety & Convenience in a Small Footprint

  25. Quik-Spec™ Power Module • Fused Elevator Shunt-Trip Disconnect • Easy to Specify and Install • UL 98 or 67 Listed Assembly • Simplifies Selective Coordination • PMP Available for multiple elevator installations • All-in-one Package • Interfaces with Fire Safety Systems • Consistent Component Wiring EVERY TIME • Saves Time for Contractor, Engineer, & Inspector • Meets all codes & standards requirements • NEC®, ANSI/ASME, NFPA72 Power Module Switch (PS) Power Module Panel (PMP)

  26. Quik-Spec™ Safety Switch • 600V heavy-duty safety switch • Available in 30, 60, or 100A, @ 200kA • With current-limiting Class J CUBEFuse, provides industry best performance against downstream arc-flash hazards • Provides extra measures of safety from contact with live parts • Visible double-break quick-make quick-break rotary blade • Takes workplace safety to the next level

  27. Resources • Quik-Spec Products • Product profiles • Data sheets • Application Notes for QS Coordination Panel • Flash Demo • Low-Peak® fuse datasheets • Selective coordination technical discussion (SPD) • How to • Selectivity Ratio Guide • SPD selective coordination section download • Voiceover PowerPoint: Why Selective Coordination • Third party articles on Selective Coordination • www.CooperBussmann.com

  28. PTP Tour Special Offer • 1-Year, No Cost Subscription to OSCAR™ 2.0 Compliance Software • Speeds Code & Agency Marking Requirements • This award winning, online, essential design tool allows you to comply quickly and accurately with 2008 NEC® and UL 508A Supplement SB for assembly SCCR marking requirements: • • Industrial Control Panels [409.110] • • Industrial Machinery Electrical Panels [670.3(A)] • • HVAC Equipment [440.4(B)] • New Project Management Features: • • Simplify your panel design and project organization. • • Save and edit existing panel designs. • • Save multiple panels under a single project. • • Copy existing panels to new projects. • New Intuitive Navigation: • • Display your one-line diagram. • • Select from pre-loaded circuit templates. • • Identify the weakest link component automatically. • • Print reports and one-line diagrams for required SCCR documentation. • • Utilize mouse-over tips to enhance your design. • Design with Confidence: • • Logic updated to current UL requirements. • Extensive 55,000+ component database. • • Search by partial part number or device rating. • Custom device option allows for entering specialized component rating information. • Get Your 1-Year, No Cost Subscription • Be sure to register for this presentation and include your e-mail address. • Details will be e-mailed to you within 7 to 10 business days.

  29. Selecting Protective Devices Handbook (SPD) This comprehensive guide to electrical overcurrent protection and electrical design considerations is based on the 2008 NEC® This handbook, with a value of $49.95, is now available free of charge online. Download the entire document or selected sections as needed. • Section 1 - Benefits Offered By Fuses • Section 2 - Applying Interrupting Ratings • Section 3 - Conductor Protection • Section 4 - Industrial Control Panels • Section 5 - Selective Coordination • Section 6 - Electrical Safety • Section 7 - Devices for Motor Circuits • Section 8 - Cost of Ownership, Calculations & Sizing Charts Visitwww.cooperbussmann.com/spd

  30. Quik-Spec™ Product Family Questions??

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