Suggestion on How to Use Industry Trainers are

Suggestion on How to Use • Industry Trainers are encouraged to use this material in their sessions • Download the presentation file • Print the Notes pages and read them as you view the presentation in the “Slide Show” view. In this way you see the slides in large format and have animation (when available) © 2015 Eaton. All Rights Reserved. . 1

Selective Coordination © 2015 Eaton. All Rights Reserved. .

Summary of Requirements: Selective Coordination Key Selective Coordination requirements • Art. 100 Definition: Coordination (Selective) • 517. 30(F) Coordination for Healthcare • 620. 62 Elevator Circuits • 645. 27 Critical Operations Data Systems (New for 2014) • 700. 28 Emergency Systems • 701. 27 Legally Required Standby Systems • 708. 54 Critical Operations Power Systems (COPS) © 2015 Eaton. All Rights Reserved. . 33

Selective Coordination System Prospective Without Selective Coordination Loads Unnecessarily Blacked Out With Selective Coordination No Unnecessary Load Blackouts OPENS Opens Fault NOT AFFECTED Fault Not Affected Unnecessary Power Loss © 2015 Eaton. All Rights Reserved. . 4 4

Selective Coordination System To achieve selective coordination for electrical systems requires engineering analysis and proper overcurrent protective device selection ØFor most electrical systems, selective coordination is a desirable design consideration ØFor some electrical systems, selective coordination is mandatory (limited number of building types and then usually only a few circuits) © 2015 Eaton. All Rights Reserved. . With Selective Coordination No Unnecessary Load Blackouts OPENS NOT AFFECTED Fault 5 5

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 © 2015 Eaton. All Rights Reserved. . Fault OPENS NOT AFFECTED 66

Code Panel Statements Provide the Reason Code Panel 13 Statement (700. 27) Proposal 13 -135 2008 NEC: “…Selective coordination increases the reliability of the emergency system” Code Panel 20 Statement (708. 54) Comment 20 -13 2008 NEC: “The overriding theme of Articles 585 (renumbered to 708) is to keep the power on for vital loads. Selective coordination is obviously essential for the continuity of service required in critical operations power systems. Selective coordination increases the reliability of the COPS system. ” © 2015 Eaton. All Rights Reserved. . 77

Selective Coordination Includes the Entire Circuit Path, Thru Both Sources Normal Source 1. From a vital load to the alternate source, the OCPDs shall be selectively coordinated Alternate Source N E ATS Panel © 2015 Eaton. All Rights Reserved. . 88

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 Normal Source 2. From a vital load to the normal source main, the emergency system OCPDs shall be selectively coordinated with all upstream devices “Emergency system(s) overcurrent devices shall be selectively coordinated with all supply side overcurrent protective devices” This wording is inclusive of the normal source path OCPDs © 2015 Eaton. All Rights Reserved. . Alternate Source N E ATS Panel 99

Definition of Selective Coordination-Article 100 Definition Change for 2014 NEC®: “Coordination (Selective). Localization of an overcurrent condition to restrict outages to the circuit or equipment affected, accomplished by the choice selection and installation of overcurrent protective devices and their ratings or settings for the full range of available overcurrents, from overload to the maximum available fault current, and for the full range of overcurrent protective device opening times associated with those overcurrents. ” X Definition now clearly covers all available overcurrents and all times associated with those currents. It’s all or nothing. Can’t be selectively coordinated just for times greater than 0. 1 or 0. 01 seconds. © 2015 Eaton. All Rights Reserved. . 10 10

Selective Coordination Requirements Article 620 Elevators 620. 62 Selective Coordination Where more than one driving machine disconnecting means is supplied by a single feeder, the overcurrent devices in each disconnecting means shall be selectively coordinated with any other supply side overcurrent protective devices. © 2015 Eaton. All Rights Reserved. . 11 11

Selective Coordination Requirements • NEC 620. 62 Elevator Circuits (since 1993) • Requires selective coordination on circuit paths when multiple elevators are on a feeder. Required to ensure safety of human life especially during emergency egress • Purpose of this requirement? • Maximize continuity of service • Quicker restoration of power © 2015 Eaton. All Rights Reserved. . 12 12

NEC 620. 62 Elevator Circuits Selective Coordination Single Feed to Multiple Elevators M 1 Main Disconnect / Over Current Protective Device Feeder Disconnects/ OCPDs F 2 B 1 B 2 B 3 E 1 E 2 E 3 Passenger Elevators © 2015 Eaton. All Rights Reserved. . Branch Disconnects / OCPDs F 4 B 4 E 4 Service Elevator 13 13

Selective Coordination (NEC) Article 700 Emergency Systems 700. 28 Selective Coordination. Emergency system(s) overcurrent devices shall be selectively coordinated with all supply side overcurrent protective devices (Wording for 701. 27 and 708. 54 is similar except for the type system) © 2015 Eaton. All Rights Reserved. . 14 14

Critical Operations Data Systems-645. 27 New requirement in 2014 NEC “Selective Coordination. Critical Operations Data System(s) overcurrent devices shall be selectively coordinated with all supply side overcurrent protective devices. ” A Critical Operations Data System is an information technology equipment system that requires continuous operation for reasons of public safety, emergency management, national security, or business continuity. New requirement for Critical Operations Data Systems will help ensure that entire critical computer systems do not crash due to a minor problem in one rack or server. © 2015 Eaton. All Rights Reserved. . 15 15

Healthcare Selective Coordination 517. 30(F) Modified requirement for 2014 NEC®: “(F) Selective Coordination. Overcurrent protective devices serving the essential electrical system shall be selectively coordinated for the period of time that a fault’s duration extends beyond 0. 1 second. Informational Note: The terms “Coordination” and “Coordinated” as used in this section do not cover the full range of overcurrent conditions. ” Healthcare inspectors should, at minimum, check to assure “coordination” to 0. 1 seconds for the life safety branch of the essential electrical system. These same circuits in commercial buildings must be “selectively coordinated” for all possible overcurrents and opening times associated with those overcurrents. This change clarifies that the healthcare requirement for coordination at 0. 1 seconds and greater is different than the requirement for selective coordination in Sections 620. 62, 700. 28, 701. 27, and 708. 54. © 2015 Eaton. All Rights Reserved. . 16 16

How to Achieve Selective Coordination © 2015 Eaton. All Rights Reserved. . 17 17

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, they are typically not selectively coordinated. 800 A 800 200 30 200 A X 30 A X 0. 1 0. 01 © 2015 Eaton. All Rights Reserved. . 18 18

How to Selectively Coordinate? How to Selectively Coordinate with Circuit Breakers? • Do short-circuit current study and coordination study investigating various types and options of CBs for specific project 1. 2. Coordination Study & resolve any non-coordination issues 800 A Short-Circuit Current Study 200 A By Ace Engineering 30 A © 2015 Eaton. All Rights Reserved. . 19 19

Circuit Breaker Selective Coordination Alternatives Circuit Breaker Options (next slides) 1. Instantaneous trip (IT) Circuit Breaker Type MCCB ICCB LVPCB 2. Instantaneous trip, coordination tables 3. Fixed high magnetic IT 4. Short time delay (STD) w/ IT override (MCCB/ICCB) 5. Short time delay (STD) w/o IT override (LVPCB) Note: some options may require larger frame or different type CBs © 2015 Eaton. All Rights Reserved. . 20 20

1. Circuit Breaker Instantaneous Trip 800 A IT = 10 X Up to where the circuit breakers cross, it is interpreted to be coordinated. See 30 A 800 A X X 200 A 30 A 200 A IT = 10 X 0. 1 s Up to 7600 A Up to 1500 A 0. 01 s © 2015 Eaton. All Rights Reserved. . 1500 A 7600 A 21 21

2. CB Manufacturer’s Selective Coordination Table illustrates the selection of molded case CBs to achieve selective coordination 22 © 2015 Eaton. All Rights Reserved. . 22

2. CB Manufacturer’s Selective Coordination Table 800 A CB Manufacturer’s Coordination Tables can help show coordination for higher fault current than simply plotting curves Example: 30 A & 200 A MCCBs 1500 A Crossing Point Interpreting Curves Max. 2700 A: CB Mfg. Coordination Testing 200 A 30 A 0. 1 s 0. 01 s © 2015 Eaton. All Rights Reserved. . 23 23

3. Coordination Fixed High Magnetic CB Fixed High Magnetic Instantaneous Trip Ø Not adjustable IT Ø High IT setting Ø Introduced to help achieve selective coordination Ø First started seeing these for circuits supplying critical loads such as data centers and financial centers 20 X 17 X 24 © 2015 Eaton. All Rights Reserved. . 24

3. Coordination Fixed High Magnetic CB The 200 A CB is a fixed high magnetic instantaneous trip (IT) device. It will coordinate with the downstream 30 A CB up to 3200 A versus 1500 A for a conventional 200 A CB. 800 A 200 A 30 A 1500 A crossing point standard adjustable IT CB 0. 1 s 3200 A crossing point fixed high magnetic CB 0. 01 s © 2015 Eaton. All Rights Reserved. . 25 25

4. Coordination STD with IT Override ØInsulated case CB with short -time delay (STD) and instantaneous override (protects CB) ØShort-time delay improves coordination from 7, 600 A (slide 21) to 12, 000 A Coordinated in shortcircuit region above 12, 000 A due to instantaneous override 800 A 200 A ØNot 0. 1 s 0. 01 s 26 © 2015 Eaton. All Rights Reserved. . 12, 000 A 26

5. Short-Time Delay (No Instantaneous Override) Selective coordination for all overcurrents up to the interrupting rating for each circuit breaker Plot curves to ensure there is no crossing of curves. Must have time settings with enough separation. 800 A 200 A 30 A 0. 1 s 0. 01 s © 2015 Eaton. All Rights Reserved. . 27 27

Lack of Selective Coordination • Many people mistakenly assume that a lower ampere rated fuse will always open before a larger ampere rated fuse D 100 A 45 A • If fuse curves cross, larger upstream fuse and downstream fuse can both open for overcurrents on the loadside of 45 A fuse (not selectively coordinated) 100 A 45 A 0. 1 s 0. 01 s © 2015 Eaton. All Rights Reserved. . 28 28

Selective Coordination with Fuses How to Selectively Coordinate with Fuses? Answer: Follow the Fuse Manufacturer’s Selectivity Ratio © 2015 Eaton. All Rights Reserved. . 29 29

Fuse Time Current Curves § For operation of upstream fuse in less than 0. 01 seconds (Isca greater than red arrow) § Use fuse manufacturer’s selectivity ratios 0. 1 0. 01 30 2005 SPD p. 90 © 2015 Eaton. All Rights Reserved. . 30

Selective Coordination Line Side Fuse Load Side Fuse LOW-PEAK® : LOW-PEAK® 2: 1 Line: Load Ratio No plotting required! © 2015 Eaton. All Rights Reserved. . 31 31

Fuse Selectivity Ratio Example 1 Low-Peak® LPJ-400 SP Low-Peak® LPJ-100 SP Overloads or faults of any level up to 200, 000 A Lineside Fuse Low-Peak® KRP-C-800 SP Loadside Fuse KRP-C_SP LPJ_SP KRP-C_SP 2: 1 LPJ_SP - 2: 1 400/100= 4: 1 only 2: 1 needed Selective Coordination achieved between these two fuses © 2015 Eaton. All Rights Reserved. . 32 32

Fuse Selectivity Ratio Example 1 Low-Peak® KRP-C-800 SP Low-Peak LPJ-400 SP Low-Peak LPJ-100 SP Lineside Fuse Circuit Path Selectively Coordinated Loadside Fuse KRP-C_SP LPJ_SP KRP-C_SP 2: 1 LPJ_SP - 2: 1 800/400 = 2: 1 only 2: 1 needed Selective Coordination achieved Overloads or faults 400/100= 4: 1 only 2: 1 needed Selective Coordination achieved of any level up to between these two fuses 200, 000 A © 2015 Eaton. All Rights Reserved. . 33 33

Fuse Selectivity Ratio Example 2 • What about branch circuit lighting panel applications? Low-Peak KRP-C-800 SP Low-Peak LPJ-200 SP Low-Peak CUBEFuse TCF 20 RN Branch circuits: CCPB disconnect with CUBEFuse © 2015 Eaton. All Rights Reserved. . 34 34

Lineside Fuse Selectivity Ratio Example 2 Low-Peak KRP-C-800 SP Low-Peak LPJ-200 SP Loadside Fuse KRP-C_SP LPJ_SP TCF 20 RN KRP-C_SP 2: 1 LPJ_SP - 2: 1 Low-Peak CUBEFuse TCF 20 RN Overloads or faults of any level up to 200, 000 A 200/20= 10: 1 only 2: 1 needed Selective Coordination achieved © 2015 Eaton. All Rights Reserved. . 35 35

Fuse Selectivity Ratio Example 2 Lineside Fuse Circuit path selectively coordinated Low-Peak KRP-C-800 SP Low-Peak LPJ-200 SP Low-Peak CUBEFuse TCF 20 RN Overloads or faults of any level up to 200, 000 A Loadside Fuse KRP-C_SP LPJ_SP TCF 20 RN KRP-C_SP 2: 1 LPJ_SP - 2: 1 800/200 = 4: 1 only 2: 1 needed Selective Coordination achieved 200/20= 10: 1 only 2: 1 needed Selective Coordination achieved © 2015 Eaton. All Rights Reserved. . 36 36

Selective Coordination – CB to Fuse © 2015 Eaton. All Rights Reserved. . 37

NEW Selective Coordination Tool Selective Coordination Designer v 1. 0 • • • 100% selective coordination plus 0. 1, and 0. 01 second coordination Configurable up to 6 device levels Identifies assembly options Suggests optimal solution Eliminates extensive researching and multiple trial and error iterations Available at eaton. com/bussmannseries Click on “Resources” Click on “Education” Click on “Solution Center Library” Click on “Selective Coordination” Click on “Online Selective Coordination Designer v 1. 0 tool” © 2015 Eaton. All Rights Reserved. . 38

Selective Coordination Fuses & CBs Summary • It is possible to meet the selective coordination requirements with fuse systems, circuit breaker systems, or combination CB/fuse systems • For fuse systems, comply with the fuse manufacturer’s selectivity ratios • For circuit breaker systems, comply with the circuit breaker manufacturer’s selectivity tables (and review selective coordination study). • For systems utilizing both fuses and circuit breakers, comply with the manufacturer’s selectivity tables. © 2015 Eaton. All Rights Reserved. . 39 39

Enforcement © 2015 Eaton. All Rights Reserved. .

Selective Coordination-Enforcement New requirements for 2014 NEC®: “Selective Coordination shall be selected by a licensed professional engineer or other qualified persons engaged primarily in the design, installation, or maintenance of electrical systems. The selection shall be documented and made available to those authorized to design, install, inspect, maintain, and operate the system. ” New for elevators (620. 62), emergency (700. 28), legally required standby (701. 27), and critical operations power systems (708. 54) Requirements added to clarify who can design the selectively coordinated system. This will make it easier for AHJs to enforce selective coordination. © 2015 Eaton. All Rights Reserved. . 41 41

Selective Coordination Ensuring Compliance Plan Review and Inspection Ø Designer provides documentation verifying selective coordination Ø Site inspection verifies correct devices to achieve selective coordination are installed per plans © 2015 Eaton. All Rights Reserved. . 42 42

Additional Selective Coordination Information • Aids in understanding and how to • SPD Electrical Protection Handbook (37 pages on selective coordination) • Go to eaton. com/bussmannseries • Click on “Resources” • Click on “Library” • Click on “Selecting Protective Devices Handbook” • Choose between clicking on “Access interactive online version” and “Download PDF” • Other information such as articles by industry experts and more © 2015 Eaton. All Rights Reserved. . 43 43

IAEI Article “Selective coordination restricts outages to the circuit or equipment affected, ensuring reliability of electrical power” By Mark Hilbert Former Chief Electrical Inspector for the State of New Hampshire Bureau of Electrical Safety and Licensing Go to eaton. com/bussmannseries Type “Hilbert” into the Google search engine © 2015 Eaton. All Rights Reserved. . 44 44

NEC Digest (NFPA Publication) NEC Digest article “Keep the Power On For Vital Loads” By Evangelos Stoyas P. E. , recently retired Chief of the Power Reliability Enhancement Program in the Special Missions Office at Fort Belvoir, Virginia. He was a member of CMP-20, which developed the new Article 708 Critical Operations Power Systems Go to eaton. com/bussmannseries Type “Stoyas” into the Google search engine. © 2015 Eaton. All Rights Reserved. . 45 45

Selective Coordination Check List • AHJ checklist available at • eaton. com/bussmannseries • Click on “Resources” • Click on “Education” • Click on “Solution Center” • Click on “Electrical Inspector Tools” • Click on “Selective Coordination Requirements Checklist” • Choose either “PDF” or Word doc” © 2015 Eaton. All Rights Reserved. . 46 46

© 2015 Eaton. All Rights Reserved. . 47