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Surge Protection

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Surge Protection

  1. 1. Surge Protection Products Rick Syverson Revised 05/28/14
  2. 2. ERICO has met the standards and requirements of the Registered Continuing Education Providers Program. Credit earned on completion of this program will be reported to RCEPP. A certificate of completion will be issued to each participant. As such, it does not include content that may be deemed or construed to be an approval or endorsement by NCEES or RCEPP.”
  3. 3. Copyrighted Materials This educational activity is protected by copyright laws. Reproduction, distribution, display and use of the educational activity without written permission of the presenting sponsor is prohibited. Copyright ERICO International Corporation, 2013
  4. 4. Learning Objectives At the end of this presentation you will be able to: • Discuss the basics of surge protection • Understand power surges and their effect on equipment • Discuss surge protection device (SPD) applications
  5. 5. •Surge Protection Device (SPD) Basics •The Standards & Compliances •Applying SPDs -Tips & Best Practices -Residential Protection -Manufacturing Facility •SPD Support to the Specifying Engineer The Agenda
  6. 6. The function of a Surge Protection Device (SPD) is to divert transient voltages and currents away from sensitive equipment, without interruption of the normal circuit operation. A B S2 S3 S1 What is a Surge Protection Device (SPD)? Normal Operation – High Resistance Surge/Transient Condition – Lower its Resistance, creating a Shunt Path
  7. 7. S P D in C o n d u c t io n T O V C o n d it io n N o m in a l A C M a in s O p e r a t in g V o lt a g e N o m in a l C la m p in g V o lt a g e o n 5 0 / 6 0 H z MCOV An SPD is a Non-Linear Protective Device – NEMASurge.com What is a Surge Protection Device (SPD)?
  8. 8. MOV – Metal Oxide Varistor Most common SPD Component Power, Instrumentation/Control, Low Freq. Communications Spark Gap A physical Gap used for Power Distribution Applications SAD – Silicon Avalanche Diode A very Low Energy SPD Component Instrumentation/Control, High Freq. Communications GTD – Gas Discharge Tube A Spark Gap in a vacuum with inert Gas Power, Instrumentation/Control, Very High Freq. Communications/RF The Non-Linear Components commonly used What is a Surge Protection Device (SPD)?
  9. 9. Many circuit designs will have a single SPD component The Non-Linear Components in the Circuit LANRJ45C6SGD112/125DSD11502SR150 Multiple Diodes & SAD’s Single GDTMultiple MOV’s What is a Surge Protection Device (SPD)?
  10. 10. The Non-Linear Components in the Circuit TOV Design Surge – Filter Low Current I/O Design Hybrid circuits designs will use multiple technologies to enhance performance What is a Surge Protection Device (SPD)?
  11. 11. The Packaging – Designed for the Form, Fit & Function Power – Panel Mount I/O – DIN Rail Mount Ethernet In-Line Packaging will vary to meet many needs, some being: -Standards -Environment -Connections -Components -Mounting -Space Power – DIN Rail Mount RF- Through Panel What is a Surge Protection Device (SPD)?
  12. 12. UL® 1449 Edition 3 UL 1449 Edition 3 is the UL Standard for Safety for Surge Protective Devices UL 1449 is widely regarded as the standard imposing the most stringent test requirements to ensure product safety. With the 3rd Edition, there is more Performance Testing. New Terms and Testing Highlights: VPR – Voltage Protection Rating I(n) – Nominal Discharge Current Rating SPD – Surge Protective Device (Replaces TVSS) Type – Intended Usage, Types 1-3 SCCR – Short Circuit Current Rating, 1 of 3 Current Tests UL is a registered trademark of UL LLC.
  13. 13. Because of the VPR & I(n) Testing, some products are no longer available. The VPR Tests and I(n) Tests are a 3-Stage Sequence. 1. A VPR test is applied to every mode 2. Then the I(n) tests are applied to every mode 3. The VPR test is applied again, noting the variance …Going through the Tests… UL® 1449 Edition 3 UL is a registered trademark of UL LLC.
  14. 14. 1. The VPR test is applied to every mode - 6kV/3A, 8x20 µs wave form applied - The Peak Let-Through Voltages are measured UL® 1449 Edition 3 UL is a registered trademark of UL LLC.
  15. 15. 2. The I(n) Test is applied to every mode - 15 Surge Applied, (3-Sets of 5 Surges) ` - The Surge Level: 3kA, 5kA, 10kA or 20kAUL is a registered trademark of UL LLC. UL® 1449 Edition 3
  16. 16. 3. The VPR Test is applied to every mode - The Variance Peak Let-Through Voltages cannot be greater than 10% UL® 1449 Edition 3 UL is a registered trademark of UL LLC.
  17. 17. The Importance of VPR’s & I(n)? 1.The VPRs demonstrate clamping performance: The lower the better a.) This is a 3rd party testing of performance 2.I(n) demonstrates the robustness of the SPD a.) UL does not test the maximum surge ratings b.) There were products that had a 400 kA rating that failed 3 kA tests c.) There are current competitive products on the market that claim to have 100 kA to 400 kA surge ratings. But their I(n) is 5 kA to 10 kA 3.UL 96A requires an I(n) of 20 kA! 4.NFPA® is requiring I(n) of 20 kA for solar PV SPDs NFPA is a registered trademark of National Fire Protection Association, Inc. UL is a registered trademark of UL LLC. UL® 1449 Edition 3
  18. 18. Type 1- Similar to secondary surge arrestors of the past, to be installed at the main service entrance. *I(n) must be 10 kA or 20 kA Type 2- Similar to TVSS of the past, to be installed after the main service entrance. Type 3- Cord connected devices - plug in Type 4- Components NEC® Article 285 describes in detail usage of SPD Type 1 and SPD Type 2. UL® 1449 Edition 3 NEC is a registered trademark of, and National Electrical Code (NEC) standard is a copyright of the National Fire Protection Association, Inc. UL is a registered trademark of UL LLC.
  19. 19. UL® 1449 Edition 3 UL is a registered trademark of UL LLC.
  20. 20. www.UL.com - Really Keeping it Real UL is a registered trademark of UL LLC. UL® 1449 Edition 3
  21. 21. www.UL.com - Really Keeping it Real Utilizing the Online Certification Directory UL® 1449 Edition 3 UL is a registered trademark of UL LLC.
  22. 22. www.UL.com - Really Keeping it Real Enter VZCA in the Keyword Box UL is a registered trademark of UL LLC. UL® 1449 Edition 3
  23. 23. www.UL.com - Really Keeping it Real All of the UL Listed Panel Mount SPD Files!!! UL® 1449 Edition 3 UL is a registered trademark of UL LLC.
  24. 24. www.UL.com - Really Keeping it Real UL is a registered trademark of UL LLC. UL® 1449 Edition 3
  25. 25. www.UL.com - Really Keeping it Real Information can be Verified! -Is the product UL Listed - Clamping voltage per mode -I(n) per mode - What modes are being protected -SPD type UL® 1449 Edition 3 UL is a registered trademark of UL LLC.
  26. 26. www.UL.com - Really Keeping it Real Customer can verify performance, parameters & compare products UL is a registered trademark of UL LLC. UL® 1449 Edition 3
  27. 27. Consulting Engineers Need To Update Their Specifications! New Language & Compliances -SPD type -VPR -I(n) -SCCR -UL 96A UL® 1449 Edition 3 UL is a registered trademark of UL LLC.
  28. 28. Location and Rating For large surge currents originating outside of the user’s facility, the mitigation is best accomplished in several stages. SPD’s installed in multiple locations provides the best Power Distribution System (PDS) protection
  29. 29. Brute force protection at the service entrance, lower surge rated SPD’s downstream IEEE® C62.41.2 assists with determinations for Surge Ratings Location and Rating IEEE is a registered trademark of The Institute of Electrical and Electronics Engineers, Inc.
  30. 30. #1 Keep the Lead Length as Short as Possible The let-through voltage will be increased because of the inductance of the wires. The voltage increase can be as much as 100 volts per foot of a #10 AWG conductor with a 3 kA, 8x20 µs surge. Note: SPD’s require a good ground path to divert surges away from the PDS. A low impedance ground, and keeping the ground lead as short as possible helps assure the best performance. A Good Installation Installation Recommendations
  31. 31. #2 No sharp bends in the wires! A very strange phenomena happens with very high level surges. The wires will actually move during the event. We can observe this in our test lab. With sharp bends in the wire, the high level surge can actually blow through the insulation at the bend. Installation Recommendations
  32. 32. The consulting engineers, electrical contractors, facility managers, and end users have very strong opinions about integrated SPD’s inside their switchgear. External Mounted SPD’s are Preferred! The reasons for this practice vary among the different groups, ranging from: Safety Service Performance Cost Distribution? Some switchgear quotations people want SPD’s integrated. Why? To recoup margins in a competitive market. Distributor Quote: “We never discount SPD’s, always selling at list price.” Inside or outside the switchgear? Installation Recommendations
  33. 33. IEEE® 1100 (Emerald Book) - Powering & Grounding Sensitive Electronic Equipment - Application Guide for Surge Protection Device (Formerly TVSS) - The latest edition recommends that they be located outside of the switchgear Installation Recommendations IEEE is a registered trademark of The Institute of Electrical and Electronics Engineers, Inc.
  34. 34. 34 You will have to address the facility issues, and… Evaluate what the hazards are and – Get an energized electrical work permit NFPA® 70E – Get certified personnel trained and equipped as per ESWP in OSHA “Such persons shall be capable of working safely on energized circuits and shall be familiar with the proper use of special precautionary techniques, personal protective equipment, insulating and shielding materials, and insulated tools” Courtesy OSHA Installation Recommendations NFPA is a registered trademark of National Fire Protection Association, Inc.
  35. 35. Inside the switchgear requires shutting down the building Installation Recommendations
  36. 36. Installed in the Switchgear Applications
  37. 37. 2007 TVSS installation at a major hospital Keep the wires as short as possible! Installation Recommendations
  38. 38. Thank you for your time! This concludes the educational content of this activity www.erico.com

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