EN60950-1-2006安全标准修订版：欧洲信息技术设备安全指南

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"EN60950-1-2006+A11-2009++.pdf 是一份重要的欧洲标准文档，涉及到电子和电气设备的安全规范，特别是针对信息技术设备。这份标准是由CENELEC（欧洲电工标准化委员会）从IEC 60950-1:2005版本转化而来，并在2009年进行了更新。它取代了BS EN 60950-1:2002，并计划在2010年12月1日之后将其撤回。" 本文档的核心知识点包括： 1. **EN60950-1标准**：这是欧洲关于信息技术设备安全的一份关键标准，规定了这类设备在设计和制造时必须遵循的安全要求。该标准确保产品在使用过程中不会对用户造成伤害，同时减少潜在的火灾和其他安全隐患。 2. **IEC 60950-1**：国际电工委员会（IEC）的60950-1标准是全球范围内的信息技术设备安全标准，EN 60950-1是其在欧洲的实施版本。IEC标准是国际通用的，旨在提供统一的安全准则。 3. **2006+A11修订版**：这个修订版（A11）是在2006年基础标准上的一个重要更新，它包含了对原标准的修改和补充，可能涉及新的安全技术要求、测试方法或合规性指南。 4. **CENELEC**：欧洲电工标准化委员会负责制定和维护电工领域的标准。CENELEC成员必须遵守内部规定，将此修订版作为国家标准，无须任何改动。 5. **安全要求**：EN 60950-1标准涵盖的内容广泛，包括电气绝缘、过电压保护、发热限制、机械结构安全、标记和用户信息、电磁兼容性（EMC）等方面。这些要求旨在防止电击、热伤害、机械伤害以及由于电磁干扰导致的功能失常。 6. **标准更新与撤回**：随着技术的发展，标准需要定期更新以适应新的技术和市场变化。BS EN 60950-1:2002在2010年底被撤回，表明了不断演进的安全标准要求。 7. **国家标准**：每个国家可能会根据CENELEC的标准制定自己的国家标准，但通常保持一致。用户可以通过申请获取最新的国家标准列表和参考文献。 8. **版权信息**：文档的版权归CENELEC所有，所有的利用权在全球范围内都受到保护。这意味着未经许可，不能以任何形式复制或使用该标准。 9. **适用领域**：EN 60950-1适用于各种信息技术设备，如计算机、服务器、打印机、通信设备等，确保这些设备在设计和生产中符合严格的电气安全标准。 EN60950-1-2006+A11-2009++.pdf是信息技术设备制造商和设计师必须了解和遵循的重要安全规范，它保障了产品的安全性，同时也对整个行业的安全标准提出了明确的要求。

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Bibliography

................................................................................................................

.....278

Index

........................................................................................................................

......

281

Figure 2A – Test finger .......................................................................................................56

Figure 2B – Test pin ...........................................................................................................57

Figure 2C – Test probe.......................................................................................................57

Figure 2D - Accessibility of internal conductiveparts ...........................................................58

Figure 2E – Voltages in SELV circuits under single fault conditions......................................64

Figure 2F – Maximum voltages permitted after a single fault ................................................66

Figure 2G – Test generator .................................................................................................70

Figure 2H – Examples ofapplication of insulation................................................................91

Figure 2J – Thermal ageing time .......................................................................................117

Figure 2K – Abrasion resistance test for coating layers......................................................118

Figure 4A

– Impac

t t

t us

ing a st

eel ball

..........................................................................

gure

–E

cross

-sec

ons

ope

nings

ting ver

acc

........................................................................................................................

.....

157

Figure 4C – Examples of louvre design.............................................................................157

Figure 4D – Enclosure openings........................................................................................158

Fig

– Typi

cal bo

om of a

re en

clo

par

enc

sed com

assembly ..........................................................................................................................

159

Figure 4F

– Baffle plate cons

tion

.................................................................................1

Figure 5A –Testcircuit for touch current of single-phaseequipment on a star TNor TT

power supply system........................................................................................................

174

Figure 5B – Test circuit for touch current ofthree-phase equipment on a star TN orTT

power supply system........................................................................................................

174

Figure 6A

– T

paration bet

a telecommunic

n net

work

and earth

...............

Figure 6B – Application pointsof test voltage ....................................................................192

Figure B.1 – Determination of arithmetic average temperature ...........................................202

Figure C.1 – Determination of arithmetic average temperature...........................................208

Figure D.1 – Measuring instrument....................................................................................211

Figure D.2 – Alternative measuring instrument ..................................................................212

Figure F.

– Narrow

groove

..............................................................................................

Figure F.2 – Wide groove..................................................................................................215

Figure F.

– V-shaped g

roov

..........................................................................................

Figure F.4 – Rib................................................................................................................215

Figure F.5 – Uncemented joint with narrow groove............................................................216

Figure F.6 – Uncemented joint withwide groove................................................................216

Figure F.7 – Uncemented joint with narrow and wide grooves ............................................216

Figure F.8 – Narrow recess...............................................................................................217

Figure F.

– Wide

recess.

.................................................................................................

Figure F.

–

Coating around terminals.

............................................................................

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60950-

2006

– 6 –

Figure F.11 – Coating over printed wiring ..........................................................................218

Figure F.

– Measurement

ugh openings

enclosures.

...........................................

Figure F.13 – Intervening, unconnected conductive part....................................................219

Figure F.14 – Solid insulating material...............................................................................220

Figure F.15 – Thin sheet insulating material ......................................................................220

Figure F.16 – Cemented joints in multi-layer printed board.................................................220

Figure F.17 – Component filled with insulating compound ..................................................221

Figure F.18 – Partitioned bobbin .......................................................................................221

Figure M.1 – Definition of ringing period and cadence cycle...............................................237

Figure M.2 – I

TS1

limit curve for cadenced ringing signal ....................................................238

Figure M.3 – Peak and peak-to-peak currents....................................................................238

Figure M.4 – Ringing voltage trip criteria ...........................................................................240

Figure N.1 – ITU-T impulse test generator circuit...............................................................241

Figure N.2 – IEC 60065 impulse test generator circuit .......................................................242

Figure S.1 – Waveform on insulation without surge suppressors and no breakdown ...........251

Figure S.2 – Waveforms on insulation during breakdown without surge suppressors ..........252

Figure S.

3 – Wavefo

rms

insulation wi

surge suppressors

in operat

ion

........................

Figure S.4 – Waveform on short-circuited surge suppressor and insulation ........................252

Figure V.1 – Examples of TN-S power distribution systems................................................260

Figure V.2 – Example of TN-C-S power distribution system................................................261

Figure V.3 – Example of TN-C power distribution system...................................................261

Figure V.

4 – Example

ngle-phase, thre

e-wire TN-C

power di

ribut

ion

.............2

Figure V.5 – Example of three line and neutral TT power distribution system......................262

Figure V.6 – Example of three line TT power distribution system........................................263

Figure V.7 – Example of three line (and neutral) IT power distribution system....................263

Figure V.8 – Example of three line IT power distribution system.........................................264

Figure W.1 – Touch current from a floating circuit..............................................................265

Figure W.2 – Touch current from an earthed circuit ...........................................................266

Figure W.3 – Summation of touch currents in a PABX........................................................266

Figure AA.1 – Mandrel ......................................................................................................272

Figure AA.2 – Initial position of mandrel ............................................................................273

Figure AA.3 – Final position of mandrel.............................................................................273

Table 1A – V

olt

age

ranges

of SEL

and

TNV

rcuit

.........................................................

Table 1B – Equivalence of flammability classes ...................................................................29

Table 1C

– Capaci

r ratings

according t

60384-14

.....................................................

Table 1D – Informative examples of application of capacitors ..............................................42

Table 2A – Distance through insulation of internal wiring .....................................................59

Table 2B – Limits for power sources without an overcurrent protectivedevice .....................72

Table 2C – Limits for power sources with an overcurrent protectivedevice...........................72

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– 7 –

60950-

2006

Table 2D – Minimum size of protective bonding conductors .................................................76

Table 2E –

Tes

duration, a.

mains

supplies

......................................................................

Table 2F – Informative examples ofprotective devices in single-phase equipment or

subassemblies

..................................................................................................................

Table 2G –

ormat

ive

exam

ples

prot

tiv

devices

in three-phase equipment

................8

Table 2H – Examples ofapplication of insulation.................................................................89

Table 2J– ACmains transient voltages...............................................................................97

Table2K – Minimum clearances for insulation in primary circuits and between primary

and secondary circuits ........................................................................................................

Table 2L – Additional clearances in primary circuits.............................................................99

Table 2M – Minimum clearances in secondary circuits.......................................................100

Table 2N – Minimum creepage distances ..........................................................................105

Table 2P – Tests for insulation in non-separable layers.....................................................109

Table 2Q – Minimum separation distances for coated printed boards .................................114

Table 2R – Insulation in printed boards .............................................................................115

Table3A – Sizes of cables and conduits for equipment having a rated currentnot

exceeding 16 A.................................................................................................................

125

Table 3B –

Sizes

of conduc

.........................................................................................

Table 3C – Physical tests on power supply cords ..............................................................129

Table 3D – Range of conductor sizes to be accepted by terminals.....................................131

Table3E – Sizes ofterminals for mains supply conductors and protective earthing

conductors .......................................................................................................................

132

Table 4A – Minimum property retention limitsafter UV exposure........................................148

Table 4B – T

emperat

ure limit

mat

ials

and component

................................................

154

Table 4C – Touch temperature limits .................................................................................155

Table 4D – Size and spacing of openings in metal bottoms of fire enclosures....................161

Table 4E – Summary of material flammability requirements..............................................171

Table 5A –

Maximum

current

.............................................................................................

Table 5B – Test voltages for electric strength tests based on peak working voltages Part 1..183

Table 5B – Test voltages for electric strength tests based on peak working voltages Part 2..184

Table 5C –Test voltages for electric strength tests based on requiredwithstand voltages .185

Table 5D – Temperature limits for overload conditions.......................................................189

Table B.1 – Temperature limitsfor motor windings (except for running overload test) .........202

Table B.2

–

Permit

ted te

mperat

ure

limit

running ov

erload tes

...................................

Table C.1 – Temperature limits for transformer windings....................................................208

1 – Val

ue of

X ......................................................................................................21

Table G.1 – AC mainstransient voltages...........................................................................223

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– 9 –

60950-

2006

INTRO

DUCTION

0 Princ

ipl

of s

afe

The following principles have been adopted by technical committee 108 in the development of

this standard.

inc

not

cov

ormanc

func

tio

char

acter

nt.

Words printed in

SMALL CAPITALS are terms that are defined in 1.2of thisstandard.

0.1 General principles of safety

It is essential that designers understand the underlying principles of safety requirements in

order that they can engineer safe equipment.

These principles are not an alternative to the detailed requirementsof this standard, but are

intendedto provide designers with an appreciation of the basis ofthese requirements. Where

the equipment involves technologies and materials ormethods of construction not specifically

covered, the design of the equipment should provide a level of safety not less than those

described in these principlesof safety.

Designers shall take into account not only normal operating conditions of the equipment but

lik

ely fa

ult

itions

nseq

ial fa

, fore

see

misus

e and ex

rna

lue

nces

ch as

altit

e, po

uti

re, ov

erv

on th

INS

SUP

PLY

and

overvoltages on a

TELECOMMUNICATION NETWORK or a CABLE DISTRIBUTION SYSTEM.

Dimensioningofinsulation spacings should takeaccount of possible reductions by

manufacturing tolerances, or where deformation could occur due to handling, shock and

vibr

ion

lik

ely to

enco

dur

, t

rt an

d norma

use

Thefollowing priorities should be observed in determining what design measures to adopt:

− where possible,specify design criteria thatwill eliminate, reduceorguard against

−

whe

the

pra

aus

e th

fun

of th

ent

d be

impaired, specify the use ofprotective means independent of the equipment, suchas

personal protective equipment (whichis not specified in this standard);

− where neither of the above measures is practicable,or in addition to those measures,

specify the provision of markings and instructions regarding the residual risks.

There are two types of persons whose safety needs to be considered,

USERS (or OPERATORS)

and

SERVICE PERSONS.

USER

the te

rm ap

plie

per

sons

tha

SERVICE PERSONS

. Re

iremen

for

prot

sho

me th

USERS

are not trained to identify hazards,but will not

intentionally create a hazardous situation. Consequently, the requirements will provide

protectionfor cleaners and casualvisitors as well as the assigned

USERS

. In gen

era

USERS

not

access

haz

ardo

par

, an

this

end,

uch

par

sho

uld

ly be

SERV

ICE

ACC

ESS

ARE

or inequipment located in

RESTRICTED ACCESS

LOCATIONS

When

USERS are admitted to RESTRICTED ACCESS LOCATIONS they shall be suitably instructed.

SERVICE PERSONS are expected to use their training and skill to avoid possible injury to

the

oth

s du

e to

obv

s that

exi

SERVICE ACCESS AREAS of the

equipment or on equipment located in

RESTRICTED ACCESS LOCATIONS. However, SERVICE

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