slide1 l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
AN OVER VIEW PRESENTATION FOR Engineers, Architects & Electrical Professionals PowerPoint Presentation
Download Presentation
AN OVER VIEW PRESENTATION FOR Engineers, Architects & Electrical Professionals

Loading in 2 Seconds...

play fullscreen
1 / 24

AN OVER VIEW PRESENTATION FOR Engineers, Architects & Electrical Professionals - PowerPoint PPT Presentation


  • 113 Views
  • Uploaded on

UL STANDARD 1449 ( 3 rd Edition). AN OVER VIEW PRESENTATION FOR Engineers, Architects & Electrical Professionals. ONE STANDARD…. ANSI /UL Standard 1449 (3 rd Edition). Replaces: UL 1449 (2.5) TVSS & OWHX Secondary Surge Arresters. NEW PRODUCT NOMENCLATURE IS SPD

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'AN OVER VIEW PRESENTATION FOR Engineers, Architects & Electrical Professionals' - vern


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

UL STANDARD 1449 (3rdEdition)

AN OVER VIEW PRESENTATION

FOR

Engineers, Architects &

Electrical Professionals

slide2

ONE STANDARD…

ANSI/UL Standard 1449 (3rd Edition)

Replaces:

UL 1449 (2.5) TVSS

&

OWHX Secondary Surge Arresters

NEW PRODUCT NOMENCLATURE IS SPD

(SURGE PROTECTIVE DEVICE)

Effective: September 2009

slide4

NRTLs

NRTLs are third-party organizations recognized by

OSHA as having the capability to provide product

safety testing and certification services to the

manufacturers of a wide range of products for use in the American workplace.

The testing and certifications are based on product

safety standards developed by U.S.-based standards developing organizations and often issued by the American National Standards Institute (ANSI).

slide5

Language in OSHA Regulations Requiring “Approval”

OSHA regulations require certain equipment and materials to be…

  • Accepted
  • Approved
  • Certified
  • Listed
  • Meet the requirements of
  • Otherwise determined to be safe
  • Tested and approved
  • Tested and listed
slide6

Product Safety Standards Accepted for NRTLs

Standards of the following organizations have been accepted for NRTLs:

  • American National Standards Institute (ANSI)
  • American Society for Testing and Materials (ASTM)
  • Underwriters Laboratories (UL)
  • Factory Mutual Research Corporation (FMRC)
slide7

NRTL Program History and Background

  • When first adopted, OSHA regulations gave two examples of approval organizations: Underwriters Laboratories (UL) and Factory Mutual Research Corporation (FMRC)
  • In 1983, OSHA was ordered by a court to remove the specific references to UL and FMRC in a successful lawsuit brought by a private lab
  • In 1988, OSHA revised its regulations to remove the references, and established the NRTL Program to recognize other organizations as NRTLs
slide8

NRTLs - Examples and Certification Marks

  • See http://www.osha.gov/dts/otpca/nrtl/nrtlmrk.html
slide9

NATIONAL ELECTRIC CODE…

The 2008 NEC (NFPA 70) already includes updates to Articles 280 and 285 to reflect the changes of ANSI/UL1449 3rd Edition.

slide10

PROTECTOR VS APPLICATION?

  • IEEE category C - High exposure
  • IEEE category B - Medium exposure
  • IEEE category A - Low exposure
slide11

TYPE DESIGNATIONS:

For installation between secondary of the service transformer and the line side of the service entrance overcurrent device. SPDs are permanently connected and installed without external overcurrent protection.

Type 1:

For installation on the load side of the service entrance overcurrent device. SPDs are permanently connected and can be use at branch panel locations.

Type 2

Point-of –Use SPDs to be installed with a minimum conductor length of 10 meters (30 ft) from the electrical service panel to point of utilization.

Type 3

Component SPDs for installation in other enclosures at any of the above locations…

Type 4

slide12

EXPOSURE LEVELS…

  • IEEE category C - 20kV/10kA
  • IEEE category B - 6kV/3kA
  • IEEE category A - 6kV/500A
slide13

VPR vs SVR…

VPR = 3rd Edition (Voltage Protection Rating)

SVR = 2.5 Edition (Surge Voltage Rating)

KeyTek

E Class

Surge Generator

3kA Current wave (8x20µs)

500A SVR Saved in Reference 1 –

Then A 3kA VPR

Current Wave was Obtained for Comparison.

3kA is 6 times the

current of 0.5kA

dumping approximately

36 times more energy

into the SPD (I2R)

500A Current wave (8x20µs)

CT used has a ratio of 0.005V/A, therefore 2.5V = 500A and 15V = 3000A.

slide14

Let through Voltages…

VPR = 3rd Edition (Voltage Protection Rating)

SVR = 2.5 Edition (Surge Voltage Rating)

KeyTek

E Class

Surge Generator

3kA VPR Voltage Wave

500A SVR Saved in

M Reference

Then A 3kA VPR

Current Wave was Obtained for Comparison.

3kA Clamp = 1552V

500A Clamp = 1352V

0.5kA VPR Voltage Wave

Voltages measured in accordance with UL 1449 2nd and 3rd Edition Standards.

550V MOVs Typically used In 480VAC Applications

slide15

In Testing

  • 20kA - Type 1 ?
  • 10kA - Type 2 ?
  • 3kA - Type 3 ?
slide16

1449 (3rdEdition) In Testing

37.7 Nominal discharge current – For Type 1 and Type 2 SPDs

37.7.1 The manufacturer shall specify (declare) the value of the Nominal Discharge Current (In) to which the sample will be tested. The value of the Nominal Discharge Current (In) selected by the manufacturer shall be: 10 kA or 20 kA for Type 1 SPDs and 3 kA, 5 kA, 10 kA or 20 kA for Type 2 SPDs. The surge generator shall be adjusted to ensure that the value of In (selected by the manufacturer) is impressed through the SPD.

37.7.2 Type 1 and Type 2 SPDs and Type 4 SPDs (intended for use in locations where Type 1 and Type 2 SPDs are installed), shall be subjected to the Nominal Discharge Current (In) Test as specified in Table 37.1. The same three representative devices that were subjected to the 6 kV/3 kA combination wave in the Voltage Protection Rating Test, shall then be subjected to fifteen (15) x 8/20 short circuit current surges, per mode. The surges are to be applied at the application points specified in 37.4.

37.7.3 During the application of these surges the samples are unenergized. Surges shall be applied in three groups of five surges. Within 1 second after the application of each surge, the manufacturer’s specified (declared) MCOV shall be applied for 60 seconds ±15 seconds. After each group of 5 surges, the sample shall rest for 30 minutes ±5 minutes. After the 15th surge, the MCOV shall be re-applied for at least 15 minutes.

Exception: After each group of 5 surges, the sample may rest for less than 30 minutes if agreeable to all concerned.

slide17

Comparison of 20kA and 10kA In

M-Ti High Energy

Surge Generator

20kA 8x20µs Current Wave

10kA wave

Saved in

Reference 2

Then A 20kA wave was Obtained for Comparison.

10kA 8x20µs Current Wave

CT used has a ratio of 1000A/V, therefore 10V = 10kA and 20V = 20kA.

20kA dumps about 4 times the energy into the SPD over a 10kA wave. I2R

slide18

In Pass Criteria

37.8.3 Pass Criteria – During and following the Nominal Discharge Current Test and the Duty Cycle Test, the following conditions shall not result:

a) Emission of flame, molten metal, glowing or flaming particles through any openings preexisting or created as a result of the test) in the product.

b) Charring, glowing, or flaming of the supporting surface, tissue paper, or cheesecloth.

c) Ignition of the enclosure.

d) Creation of any openings in the enclosure that results in accessibility of live parts, when judged in accordance with Accessibility of Live Parts, Section 13.

e) Supplementary protective devices, internal or external to the SPD, opening.

slide19

Symmetrical Fault Current

39.2.3 The Short Circuit Current Rating Test Circuit is shown in Figure 39.1. The Short Circuit Current Ratings Tables are shown in Tables 39.2 and 39.3.

Table 39.2

Short-circuit current ratings (SCCR) selection table – rms symmetrical current in amperes

5000

10,000

14,000

18,000

22,000

25,000

30,000

42,000

50,000

65,000

85,000

100,000

125,000

150,000

200,000

slide20

IEEE Standard C62

IEEE Std C62.72TM-2007

IEEE Guide for the Application

of Surge-Protective Devices for Low-Voltage

(1000 V or Less) AC Power Circuits.

For Type 1 Locations Neutral And Ground Are BONDED.

slide21

SPD LOCATION OR APPLICATION

Switchgear Locations

Secondary Or Subpanel Locations

Flashover Levels?

Arc Flash?

slide23

SPD kA Ratings…

How much protection is enough and is there such a thing as to much?

kA/mode or phase?

slide24

END

Information provided in this presentation courtesy of OSHA, UL, IEEE, NEC and ETL Intertek