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1 Notes Total of 28 slides Aids to assist in developing your presentation: SPD08 Selective Coordination Section p108-146, Quik-Spec Family Brochure, QSCP.

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Presentation on theme: "1 Notes Total of 28 slides Aids to assist in developing your presentation: SPD08 Selective Coordination Section p108-146, Quik-Spec Family Brochure, QSCP."— Presentation transcript:

1 1 Notes Total of 28 slides Aids to assist in developing your presentation: SPD08 Selective Coordination Section p , Quik-Spec Family Brochure, QSCP App Note, Product Profiles, and Datasheets

2 Selective Coordination Productivity Through Protection Seminar Series

3 3 Agenda Selective Coordination What is selective coordination Mandatory Requirements Why mandatory How to comply with fuses Benefits of fusible system Cooper Bussmann solutions Resources

4 4 What is Selective Coordination For the full range of possible overcurrents LINE SIDE LOAD SIDE KRP-C-1200SP LPS-RK-600SP Only closest upstream overcurrent protective device from overcurrent opens Other upstream (larger) overcurrent protective devices do not open Fault Only this fuse opens

5 5 Selective Coordination (NEC ® ) Article 100 Definition Article 700 Emergency Systems Coordination (Selective) Localization of an overcurrent condition to restrict outages to the circuit or equipment affected, accomplished by the choice of overcurrent protective devices and their ratings or settings Coordination. Emergency system(s) overcurrent devices shall be selectively coordinated with all supply side overcurrent protective devices (Two exceptions apply for and ) (Wording for and is the similar except for the type system)

6 6 Without Selective Coordination With Selective Coordination Loads Unnecessarily Blacked Out No Unnecessary Load Blackouts Opens Not Affected Unnecessary Power Loss OPENS NOT AFFECTED Fault Selective Coordination System Prospective

7 7 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) 0.1s 100A 45A 0.01s D 45A 100A

8 8 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 A X X 800A 200A

9 9 With Selective Coordination No Unnecessary Load Blackouts OPENS NOT AFFECTED Fault 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)

10 10 Summary of Requirements: Selective Coordination Selective Coordination requirements 100Definition: Coordination Selective (2005) Required for Essential Electrical Systems (2005) Required for Circuits with multiple Elevators (1993) 700.9(B)(5)(b) Exception. OCPDs permitted at alternate source or for equipment (2008) Required for Emergency Systems (2005) Required for Legally Required Standby Systems (2005) Required for Critical Operations Power Systems (COPS) (2008)

11 11 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 OPENS NOT AFFECTED Fault Selective Coordination Requirements

12 12 Selective Coordination Includes the Entire Circuit Path, Thru Both Sources 1.From a vital load to the alternate source, the OCPDs shall be selectively coordinated ATS Alternate Source NE Normal Source Panel

13 13 Selective Coordination Includes the Entire Circuit Path, Thru Both Sources 1.From a vital load to the alternate source, the OCPDs shall be selectively coordinated 2.For a vital load to the normal source main, the OCPDs shall be selectively coordinated ATS Alternate Source NE Normal Source Panel Emergency system(s) overcurrent devices shall be selectively coordinated with all supply side overcurrent protective devices This wording is inclusive of the the normal source path OCPDs

14 14 NEC ® 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 Selective Coordination Requirements

15 15 How to Selectively Coordinate with Fuses? Lets take a look at what it takes to selectively coordinate fuses

16 16 Selective Coordination- Fuses LINE SIDE LOAD SIDE KRP-C-1200SP LPS-RK-600SP 600A Fuse Clearing AVAILABLE SHORT-CIRCUIT CURRENT Tc Tm Tc 1200A Fuse Melting 1200A fuse melting energy must be greater than 600A fuse clearing energy

17 17 Selective Coordination No plotting required! LOW-PEAK ® : LOW-PEAK ® 2:1 Line:Load Ratio Line Side Fuse Load Side Fuse (SPD p112)

18 18 Fuse Selectivity Ratio Example 1 Overloads or faults of any level up to 200,000A Low-Peak® KRP-C-800SP Low-Peak LPJ-400SP Low-Peak LPJ-100SP KRP-C_SPLPJ_SP KRP-C_SP2:1 LPJ_SP-2:1 Loadside Fuse Lineside Fuse KRP-C_SPLPJ_SP KRP-C_SP2:1 LPJ_SP-2:1 400/100= 4:1 only 2:1 needed Selective Coordination achieved between these two fuses 800/400 = 2:1 only 2:1 needed Selective Coordination achieved Circuit Path Selectively Coordinated

19 19 What about branch panelboard applications, such as lighting? Use the Quik-Spec Coordination Panelboard Fuse Selectivity Ratio Example 2 Low-Peak KRP-C-800SP Low-Peak LPJ-200SP Low-Peak CUBEFuse TCF20RN Branch circuits: CCPB disconnect with CUBEFuse

20 20 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

21 21 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 KRP-C(amp)SP LPJ(amp)SP LPS-RK(amp)SP CUBEFuse TCF(amp)RN

22 22 Quik-Spec Product Family

23 23 The New Standard in Fusible Panelboards Simplifies Selective Coordination Better Value Smaller Footprint Additional Main Options Patented Fuse Rejection, Interlock and Indication

24 24 18, 30 & 42 Branch Circuit Positions w/ Space Options Available Up to 60A Branch Circuits & 1-, 2-, 3-pole options 600Vac / 200A w/ Fusible &Non-Fusible Main or MLO 50kA, 100kA & 200kA SCCR Isolated or Non-Isolated Ground Option 200A or 400A Neutral Option Feed-Through & Sub- Feed Through Lugs Option NEMA 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 Finger-safe CUBEFuse® CCPB for Branch Circuit Protection Removable Branch Knockouts Spare Fuse Holder w/ Spare Fuses Included w/ Each Panel Quik-Spec Coordination Panelboard Callouts 20 Advance Shipment of Cans Available Single QSCP Part Number

25 25 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

26 26 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)

27 27 Quik-Spec Safety Switch 600V heavy-duty safety switch Available in 30, 60, or 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

28 28 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

29 29 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 [ ] 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 address. Details will be ed to you within 7 to 10 business days.

30 30 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 Visit

31 31 Quik-Spec Product Family Questions??


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