iec 62368-1: the latest on impact, transition - amazon...

UL AND THE UL LOGO ARE TRADEMARKS OF UL LLC © 2017. ALL RIGHTS RESERVED

IEC 62368-1:

The Latest on Impact, Transition &

Status…

Jeff Pasternak

Product Regulatory

Business Strategist

Data Center Group

Intel Corporation

Tom Burke

Principal Product Safety Engineer,

Consumer & Enterprise

Technology Equipment

UL LLC

Grant Schmidbauer, Nemko USA, Inc.

In preparation with:

IEEE/PSES Sand Diego Chapter meeting Dec. 2017

2

Abstract

• Tom Burke UL LLC, and Jeff Pasternak, Intel Corp.

presented a status update on IEC 62368-1 at ISPCE 2017 in

San Jose, CA (May 2017).

• This presentation is a recap of that presentation with latest

updates since May 2017.

• IEC 62368-1 Ed. 2 (Safety of AV/ICT Equipment) has been

adopted in two major regions of the world, North America

(Canada & U.S.) and Europe (EU), and is in the process of

being adopted in other countries & regions, some possibly

as early as the second half of this year.

• Formal transition dates are approaching fast, driving a

recent uptick in worldwide interest in the standard,

especially by manufacturers who will be directly impacted.

2

3

Abstract

• IEC TC108’s Hazard-Based Standard Development Team (HBSDT) met previously this year in April and have met again in October, thus providing a good opportunity for PSES members attending SPCE 2017 (Boston, MA) to get an update on the latest work on Ed. 3 of IEC 62368-1, plus other late-breaking updates and developments associated with the Edition No. 2 transition, including planned adjustment of the EU formal transition date (DOW) by 18 months.

• This presentation will concentrate on key challenges and observations from a manufacturer’s perspective, and from a certifier’s experience, but also allow ample time for audience members to share personal knowledge, experiences, perspectives and concerns.

3

4

Topics

IEC 62368-1: Introduction

A Manufacturer’s Perspective: Key Considerations

IEC 62368-1, Edition No. 3 (pending)

Transition Update

USB issues & (new) IEC 62368-3 (time permitting)

4

IEC 62368-1: Introduction

5

6

The IEC & IEC 62368-1

• The International Electrotechnical Commission (IEC) drives global

standardization in the field of safety

• IEC standard development committees consist of deemed experts

• Globally countries adopt the use of IEC standards with National

differences

• IEC 62368 is the safety standard of Audio, Visual, Information &

Communication Technology Equipment

developed to be technology independent

a hazard-based safety standard

7

TC74

Transition History to IEC 62368-1

IEC 380

Office Equipment

IEC 435

Data Office

Equipment

IEC 60950-1

Information

Technology

Equipment

IEC 60065

Audio, Video ,

Similar Apparatus

IEC Guide 112

Guide for Safety

of Multimedia

Equipment

ACOS(Advisory Committee

on Safety)

TC92

IEC 62368-1

Audio / Video

Information and

Communication Technology

Equipment

TC108

HBSDT

Hazard Based Safety Standard

Technology Independent

8

IEC 62368-1 - Market Relevance

Total 43% of the CB Scheme

Covers almost all electronic equipment in your living rooms

9

IEC 62368-1 Uses a Three Block Model

Hazardous

Energy

Source

Transfer

MechanismBody Part

Model for Injury

Hazardous

Energy

Source

Body PartSafe Guard

Model for Safety

10

Hazards Covered by in IEC 62368-1

10

For each hazard, energy sources are classified into three levels:

Level 1: Non-detectable to a detectable energy source

Level 2: Detectable to painful energy

Level 3: Painful to harmful energy

Electric Shock

Fire (internal / external)

Hazardous Substances (battery, chemical, ozone)

Mechanical (stability, sharp edges, moving parts)

Thermal Burn (hot surfaces)

Radiation (laser, x-ray, optical, sound)

11

IEC 62368-1 Required Safeguards (ISO/IEC Guide 51 principles)

Level 3 EnergyPainful to harmful

Level 2 EnergyDetectable to

painful

Level 1 EnergyNon-detectable to

detectable

Energy Source

Hazardous?

NO

YESNo safeguard

required

Single

Safeguard

Double

Safeguard

Ordinary Person

Instructed Person

Skilled Person

IEC 62368-1

A Manufacturer’s Perspective w’ Key

Considerations

12

13

Scl. 4.1.1 Acceptance of IEC 60950/60065

Components

Sub-clause 4.1.1 was purposely included in IEC62368-1

to help manufacturers during transition period

Sub-clause 4.1.1 has caused debates:

• What is a component or subassembly?

• Why only valid in second edition?

There is a note in IEC 62368-1, 2nd Edition that reference components and subassemblies that already

comply with IEC 60950-1 or IEC 60065 are to be acceptable as part of the equipment covered by

IEC62368-1 without further evaluation other than to give consideration to appropriate use of the

component or subassembly in the end-product.

There is also an additional note in IEC 62368-1 to eliminate Scl.4.1.1 in ed. 3 of the standard, however

this is now removed..

14

Why is Scl. 4.1.1 so Important to Manufacturers?

To ease the transition for manufacturers

Manufacturers currently cannot procure certified wiring to IEC wiring

standards (IEC 60332-series) referenced in IEC 62368-1

Its inevitable some countries will be late in adopting 3rd Edition - some

products not able to certified to 2nd Edition without 4.1.1

Helps with many near end of life component products – alleviates

unnecessary need to not update a new certification – especially when

new standard technically is NOT developed to deal with safety issues

15


IEC 62368-1 references the requirement for wiring to be compliant

with IEC 60695- and 60332-based Standards for flammability of wire

insulation and tubing. Very few suppliers of wiring complying with

these standards available.

We need to find a way to allow manufacturers to use the existing

evaluation for wire and tubing insulation, while the industry prepares

for the IEC wiring standards

Wiring

• 3rd Edition to include alternative acceptance criteria based on similar testing for UL

approved wire

• Wire insulation shall comply with the recommended performance requirements of the

applicable IEC 60332 standards. Alternatively, the wire insulation and tubing shall comply

with IEC/TS606095-11-21, with the sample conditioning of 6h minimum and without

consideration for pigmentation

Additional TC108 work to help…

16

Avoid:

• Redesign of ventilation openings new IEC 62368-1

flame cone area requirements

• Sourcing / certifying wire to IEC wiring standards

Component Power Supplies


17

240VA (Energy Hazard)

YES currently sited as hazard in IEC 60950-1

NOT sited as hazard in IEC 62368-1

What can this mean?

18

What Does It Mean – No 240VA Required Protection?

Accessibility by Ordinary Person deemed acceptable

Power Supply – No need for 240VA

output limits (e.g. splitting 12V rails)

Motherboard – 240VA

access permitted by

Elimination of cover

screws – serviceability

now OK without need of

a tool

19

Global Adoption of IEC 62368-1

Drive Bay Backplane Accessibility – No need

for current limiting or insulation barriers

Potential design costs saving opportunities right!

Not so fast…what may prevent this?

What Does It Mean – No 240VA Required Protection?

20

Fire Enclosure Plastics Flammability

IEC 62368-1 based on power NOT weight!

Standard CriteriaFlame

Rating

IEC 60950-1 > 18 Kg 5V

< 18 Kg V-1

IEC 62368-1 > 4000W 5V

< 4000W V-1

small medium large

< 4000W = V1> 4000W = 5V

21

Fire Enclosure Ventilation Opening Designs

IEC 62368-1, 2nd Edition identified as being “more

onerous” for side ventilation openings!

IEC 62368-1, 2nd Edition bases requirements on flame

cone area for side ventilation openings making

requirements more onerous!

22

Flame Cone Area Requirements

Top Openings

Bottom OpeningsWith respect to the Potential

Ignition Source (PIS), bottom

openings are any openings with

15mm areas

Potential Ignition

Source (PIS)

15mm 15mm

With respect to the Potential

Ignition Source (PIS), top

openings are any openings within

2mm area around the cone

Side Openings

Any opening that falls within either

the top or bottom areas! – MORE

ONEROUS THAN IEC 60950-1!

- 5mm any dimension; or

- 1mm in width, regardless length

- 3mm any dimension; or

- 1mm in width, regardless length

23

Ed. 2 Air Flow Consideration - Flame Cone Area

Requirements

Top Openings

Air Flow

Top Openings – with Air Flow

Considerations

45 Degree Rotation

With respect to the Potential

Ignition Source (PIS), top

openings are any openings with

within the extended area as a

result of the 45 degree rotation

15mm 15mm

Potential Ignition

Source (PIS)

24

Ed. 2 Assessing Fire Enclosure Side Ventilation

Openings

With a PIS at the edge of the

component zone the bottom portion of

the flame cone extends out through

the side vents.

With a PIS at the edge of the component

zone, the top portion of the flame cone

(cone straight with no airflow

considerations) extends through the side

vents

With a PIS at the edge of the component

zone, the top portion of the flame cone

with airflow considerations) extends further

through the side vents

25

Current constructions today

comply with IEC 60950-1

5 degree projection requirements

Ed. 3 Assessing Fire Enclosure Side Ventilation

Openings

3rd Edition adds 6.8.4.3.5 for Side Openings

Clause 6.8.4.3.5 references new Figure

Current constructions “ DO

NOT” comply with IEC

62368-1 flame cone

requirements

5o

PIS

IEC 62368-1 Edition No. 3 (pending FDIS)

26

27

Ed. 3 of IEC 62368-1:

Publication Schedule

Current Stage (June 2017) –> Committee Draft for Vote

(CDV), with 3 month voting period.

Vote closed Sept. 2017, with positive result, and comments

Next Stage (Q1 2018) –> Final Draft International

Standard (FDIS), with 3 month voting period.

Expected IS to be published in mid-2018.

Target Publication Date -> July 2018

29

Ed. 3 of IEC 62368-1:

Anticipated Changes

Clause 1 (Scope)

• Modernization of examples of products under scope,

incl. 3D Printers, Kiosks & Wearable Technology

(Annex A).

• Incorporation of IEC 60950-22 (Outdoor Equipment) into

scope/body.

• Incorporation of IEC 60950-23 (ICT w/Robotics) into

scope/body.

30

Ed. 3 of IEC 62368-1:

Anticipated Changes

Clause 1 (Scope)

• IEC 60950-21 (RFT) requirements being incorporated

into new IEC 62368-3, DC power transfer through

communication cables or ports, with expansion to

cover both RFT & USB/PoE/etc. interfaces…

PSE – Power Sourcing Equipment

PD – Powered Devices

31

Ed. 3 of IEC 62368-1:

Anticipated Changes

Clause 2 (Norm. References) & Clause 3 (Terms/Defs.)

• Various updates & refinements.

• New terms/definitions, include,

• Backfeed

• Calculated Sound Dose (CSD)

• Fixed Equipment

• Insulating Liquid

• Professional Equipment

• Wireless Power Transmitter

• Work Cell

31

32

Ed. 3 of IEC 62368-1:

Anticipated Changes

Clause 4 (General)

• IEC TC108 has decided to keep the legacy component

(60065 & 60950-1) provision in 4.1.1 (for Ed. 3 FDIS).

Note: IEC TC108 Interpretation Panel has now

completed a formal interpretation of 4.1.1, and its

application to systems of AV/ICT, including external

components like external power supplies, and will publish

(soon) as an INF.

32

33

Ed. 3 of IEC 62368-1:

Anticipated Changes

Clause 4 (General)

• New requirements for insulating liquids (also Cl 5 & 6).

• New requirements for coin/button cell batteries.

• For equipment installed by Ordinary Persons, all likely

positions of orientation of the equipment to be taken

into account, incl. possibility of mounting to a non-vertical

surface, and regardless of instructions provided by the

manufacturer…

34

Ed. 3 of IEC 62368-1:

Anticipated Changes

Clause 5 (Electric Shock)

• Refinement of requirements for Clearances, incl. new

prescriptive option (Annex X) based on 60950-1 Tables.

• New requirements (w/Annex G) for enameled Fully

Insulated Wire (FIW), sometimes known a Zero Defect

Wire.

• New requirements for safeguards associated with

Backfeed.

35

Ed. 3 of IEC 62368-1:

Anticipated Changes

Clause 5 (Electric Shock)

• New material on interconnected ES3/ES2/ES1 circuits

in secondary circuits of SMPSs (similar to 60950-1

approach).

• Note: Recently announced -> CENELEC OSM (EU) now

accepts UL 1446 for EIS (electrical insulation system)

instead of IEC 60085.

36

Ed. 3 of IEC 62368-1:

Anticipated Changes

Clause 6 (Fire)

• Refined Top, Side & Bottom Opening requirements, incl.

re-introduction of 5 degree principle from 60950-1.

• Critical for products requiring high air flow, eg. enterprise

servers.

36

37

Ed. 3 of IEC 62368-1:

Anticipated Changes

Clause 6 (Fire)

• Refined Top, Side & Bottom Opening requirements, incl.

change in consideration for flame cone for top openings.

37

38

Ed. 3 of IEC 62368-1:

Anticipated Changes

Clause 6 (Fire)

• Removal of forced air flow considerations…

• Glow Wire Test reintroduced as option for parts outside

Fire Enclosure.

• New allowance for VW-1 rated wiring instead of IEC

wiring flammability standards.

39

Ed. 3 of IEC 62368-1:

Anticipated Changes

Clause 6 (Fire)

• Note: Agreement also reached by HBSDT to pursue a

Formal Interpretation.

• For Peripherals (PDs) not investigated in a system (PSE &

PD), and connected to common industry busses featuring

power delivery (e.g., USB, PoE, etc.), we no longer can

automatically assume supplied by PS2 or LPS (i.e., they

may not be < 100 W).

• Rationale: Such busses are potentially > 100 W, especially

non-industry-spec-compliant PSE .

• Impact: Enclosure flammability rating of peripherals (PDs).

39

40

Ed. 3 of IEC 62368-1:

Anticipated Changes

Clause 8 (Mechanical)

• Refinement of Slide Rail Mounted Equipment (SRME)

requirements.

• For new definition Work Cells, new 60950-23 based

requirements included.

41

Ed. 3 of IEC 62368-1:

Anticipated Changes

Clause 9 (Touch Temperatures)

• Refinement of Touch Temperature Limits (Table 38).

• New requirements for Wireless Power Transmitters.

• New allowance for devices/parts w/ Small Heat

Capacity (considerations per IEC Guide 117) instead of

Table 38.

41

42

Ed. 3 of IEC 62368-1:

Anticipated Changes

Clause 10 (Radiation)

• Refinement of Radiation Energy Source Classifications.

• Refinement of Acoustic Energy requirements for PMPs,

including addition of Dose Methodology.

• Additional of IEC 62471-5 for laser illuminated

projectors.

43

Ed. 3 of IEC 62368-1:

Anticipated Changes

Annex F (Markings & Instructional Safeguards)

• Removal of maximum altitude symbol (from earlier

draft).

• Rev to rated current, will accept 100-240V, max 6A

Annex G (Components)

• Refinement of Resistor (as safeguard) requirements.

• Refinement of IC Current Limiter requirements (incl.

replacement of current three (3) test program options

with refined single (1) test program).

43

44

Ed. 3 of IEC 62368-1:

Anticipated Changes

Annex M (Batteries)

• Update to latest IEC 62133-1 & IEC 62133-2

• Addition of IEC 62619 for non-portable applications.

• IEC 62619: Secondary cells and batteries containing alkaline or other

non-acid electrolytes - Safety requirements for secondary lithium cells

and batteries, for use in industrial applications

• Refined Battery Ventilation requirements.

44

IEC 62368-1 – Transition Update

45

47

Countries in Process of Implementing

IEC 62368-1 as National Standard (examples)Country Standard IEC Equivalent Implementation

Date

Notes

Australia AS/NZS 62368.1 IEC 62368-

1:2014

TBD November 2017 – Expected completion date

China GBxxx IEC 62368-

1:2014

N/A May 2017 – standard to be reviewed

June 2017 – submit to SAC for approval

Q4 2018 – Implement as GB national standard

European Union EN 62368-

1:2014

IEC 62368-

1:2014

20 June 2019

20 December 2020

Compliance per EN 62368-1 or EN 60065 / EN 60950-1 currently

allowed.

If modified DOW published in EU OJ, extension will impact LVD

and RED

Japan J 62368-1 IEC 62368-

1:2014

TBD - 2019? 2018 – Expected publication

Korea KN 62368-1 IEC 62368-

1:2014

2018 – Expected publication

Mexico NMX-I-62368-1-

NYCE-2015

IEC 62368-

1:2014

Voluntary - TBD Study continues towards utilizing NOM standard for mandatory

approval

South Africa SANS 62368-

1:2011 (Ed. 1.00)

IEC 62368-

1:2010

Voluntary - TBD In process of issuing Ed. 2 (TBD)

Taiwan CNS 15598-1

(2012)

IEC 62368-1:

2010

N/A BSMI initial plan

Announcement: in 2018

Enforced: in 2020

48

EU Announced Formal Transition Dates

EU Date of Withdrawal (DOW) - Legacy Standards

(60065/60950-1): June 20, 2019 (original)

Official Journal (OJ) of the EU (latest): Sept. 8, 2017

DOW = Date superseded standards (60065 & 60950-1) cease to give

‘presumption of conformity’ with the essential requirements of the

relevant Union legislation (LVD & RED).

48

49

Recent EU Activity on EN 62368-1 Ed. 2

• CENELEC BT voted to extend DOW from June 20, 2019

to December 20, 2020 (18 mo extension).

• Active discussion between CENELEC & European

Regulators to establish the revised DOW as new published

date that superseded standards (EN 60065 & 60950-1)

cease to give ‘presumption of conformity’ with the essential

requirements of the relevant Union legislation (LVD &

RED).

• Need change published formally in EU Official Journal

(OJ)!

• Outcome expected Q4 2017 (we thought it would have

already happened by now)!

50


• CENELEC also agreed to remove the legacy component

provision in 4.1.1 from Ed. 2 (effective Dec. 20, 2020).

o Legacy component provision also will be removed from Ed. 3

of EN 62368-1, even if IEC TC108 keeps it in.

• In EU, after Dec. 20, 2020, EN 60065 & EN 60950-1

certified components no longer will be permitted in

equipment investigated to EN 62368-1 without additional

investigation.

• However, as a formal amendment process, CLC TC108 has

started an UAP (Unique Acceptance Procedure) for an

Amendment for a Common Modification of EN 62368-

1:2014 to delete the allowance to use the legacy standards

for components in clause 4.1.1.

51


If DOW/Date of Cessation extended, and announced in the

EU Official Journal (OJ):

Manufacturers have option to transition from EN 60065 or EN

60950-1 to Ed. 3 of EN 62368-1 directly, bypassing Ed. 2 of

EN 62368-1.

By December 20, 2020, manufacturers would need to

transition to either, Ed. 2 or Ed. 3 of EN 62368-1

And by December 20, 2020, manufacturers would need to

ensure that their complete supply chain of legacy

components (system parts) are also transitioned to Ed. 2 or

Ed. 3 of EN 62368-1.

51

52

UL Announced Formal Transition Dates

US (UL) Effective Date – New Products: June 20, 2019

Soft Transition: No formal Industry File Review (IFR) of

existing certifications.

Will modify

transition in

alignment with EU

(ie, Dec. 20, 2020

when published)

52

54

IEC 62368-1 Transition Time

Lines

2010 Jan

2017 2019

IEC 62368-1 1st Edition

2020

IEC 62368-1 2nd Edition

2018

Publishing of

IEC 62368-1 3rd Edition

2016

Dec ’16 IEC 62368-1 3rd Ed. - CD

May’16

Critical Standard Issues

Discovered

Jun 20’19

CENELEC EN 62368-1 2nd Edition DOW

5 Year Time Frame to Transition – Cl 4.1.1 to Aid Smooth Transition

~1 Year Time Frame to Transition

2014 Feb

May’17 Oct’17

CDV Vote Period

Dec 20, 2020

TC108X Proposal Extend DOW

CENELEC EN 62368-1, 3rd Edition

~1.5 Year Addition to Transition

Jul’18 Int’l Adoption Gate Opens

CENELEC

China

India

Taiwan

US/Canada

Australia/NZS

No DOW UL/CSA 62368-2nd Edition

TBD

TBD

TBD

TBD

Current Status

Current DOW Status

Status Assumptions

EDCOM Process FDIS

Jan’18

5-6 month 2-3 month 2-3 month

FDIS Vote Period

Apr’18

EDCOM & Translation

2-3 month

Jul’18

BEST CASE

55

Manufacturer’s Decision

Bottom Line -> Important Decision needed by manufacturers on transition

from legacy standards, 60065 & 60950-1, to 62368-1….

IEC 60065, Ed8,

or

IEC 60950-1,

Ed2, Am2

IEC 62368-1, Ed2

IEC 62368-1, Ed3

… use Ed. 2 now,

or wait until mid

2018,

for Ed. 3…

USB issues & (new) IEC 62368-3

(time permitting)

56

57

Ed. 1 of IEC 62368-3:

Publication Schedule

Current Stage (Oct 2017) –> Final Draft International

Standard (FDIS), with 1.5 month voting period.

Vote closes Nov. 17, 2017, expected positive result,

w’comments

Next Stage (Q1 2018) –> International Standard (IS).

Expected IS to be published in early 2018.

Target Publication Date -> April 2018

59

Limited Power Sources & Evolution of USB 3.0 /3.1

- Allows charging at 5V, 12 & 20V

- Up to 5A currents / 100 W charging

- Likely new standard for cell phone

- Becoming more popular on tablets &

laptops

Quick Charging Standardization

-12V @ 2A on micro-USB

-12V @ 3A on USB-C

-20V @ 3A on USB-C (Profile 4)

• It is a propriety system

• Certification is required

• Quick charge is one of the most common protocols

60

Limited Power Sources – USB Challenges

PS3

> 100 watts

PS2

< 100 watts

After 5 sec.

PS1

< 15 watts

After 3 sec.

Electrically caused fire

power source classes

IEC 62368 – USB typically assessed to PS2 / maybe PS3

MUST think about:

A device connected to a USB >100W (PS3) – REQUIRES fire

enclosure

Inoperability's between the host and USB device• IEC TC100 has issued Committee Draft for IEC 63002 covering inoperability guidelines for USB-C

power supplies

• Many concerns can be addressed by communication between the power supply and host device

• The draft standard covers potential issues for the cable connecting the EPS to the host device

• Inoperability affects both functionality and safety

61

USB-C Safety Certification Design Challenges

Ensure cable can support maximum current

Safe guard against:

• Fault condition – contamination causing a short

• Inoperability – supply to device (communication)

• Voltage differences – Will device need voltage protection?

• Power limiting – will supply provide current limiting?

• Common Connector – fits into USB slot – however no

certification is required on common connectors

62

New IEC 62368-3 (108/695/FDIS): DC power transfer

through communication cables or ports

• Equipment interface requirements for both,

a) IEC 60950-21 (RFT) circuits @ ES3, and

b) other low voltage busses @ ES1 & ES2 with DC power

transfer, such as USB, and PoE, and in-building telecom

(formerly TNV-2).

• Covers both Power Sourcing Equipment (PSE) &

Powered Devices (PD)

63



Power limitation for PSE @ ES1/ES2 (e.g., USB, PoE, etc.):

a) If powering building wire (e.g., PoE) = LPS (Q.1);

b) If powering other equipment = PS2 or LPS; and

• under abnormal & single fault conditions, the PSE

output current shall not exceed, 50 % (for circuits ≤ 2 A) rated max. for more than 5 seconds; and

30 % (for circuits > 2 A) rated max. for more than 5 seconds; and

8.0 A under any circumstances.

• Note: Exception if power delivery spec. has specific limits

for fault current, use spec. limit.

64



Voltage limitation for ES1/ES2 (e.g., USB, PoE, etc.),

a) PSE: Output voltage, under single fault, shall be limited

to, 130% of rated for circuits, w/o negotiation; or

130% of rated for circuits > 5V (max 7.5 V), w/negotiation;

150% of rated for circuits ≤ 5V, w/negotiation.

b) PD: Shall not create any hazard when supplied with

130 % of nominal rated for circuits > 5V (min. 7.5 V);

150 % of nominal rated for circuits ≤ 5V.

65



• In Amendment No. 1, RFT requirements also will need

to be aligned with (new): ITU-T K.50, Safe limits for

operating voltages and currents of telecommunication

systems powered over the network.

• Other refinements for ES1 & ES2 also anticipated !

• IEC TC 64 will have a similar function for IEC 60364-7-

716, which includes the electrical installation/

infrastructure, like PoE outlets in the wall and PoE

wire/cabling behind the wall.

Thank you

for attending

2017 SPCE Boston!

Q&A

Discussion

66

iec 62368-1: the latest on impact, transition - amazon...

Documents