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Differences between "IEC 60950-1:2001" and "IEC 60950-1:2005"/ d0 S5 Q h" X9 V" l1 m
? : Level of importance (0=not, 3=very) Page 3 of 20 Document date: 4-Apr-2006
, A1 b5 H# v0 D! T) _Subclause Change ? Comment" n( B4 o* j0 r6 A
Foreword Added 0 Additional parts "22" and "23" mentioned that are planned but not published8 u4 h" s8 P2 R
yet (Mar-2006).
7 `* R" @ V, r3 ?- m3 \1.1.1 Clarified 2 IEC 60950-1 applies as well to components and subassemblies intended for
9 u) r r/ D! Y/ |5 `6 Mincorporation in ITE.
# G- h) A/ P: s/ l& c0 d4 {% o1.1.3 Modified 1 "Support systems" were deleted from list of excluded examples.
0 v! U" j% ^- ]. g, Q1.2.2.3 New 1 RATED RESTING TIME replaces subclauses 1.2.2.3~5 (CONTINUOUS OPERATION,
1 R, L$ t* A1 _8 ~& P/ zSHORT-TIME OPERATION and INTERMITTENT OPERATION).
1 y0 d J( ~# M+ D1.2.5.3 New 0 PLUGGABLE EQUIPMENT as definition covering both pluggable equipment types
3 g/ W0 k1 U: R( v' \5 |7 dA and B. H3 {( X! Z) w$ Q" Q1 I1 {) A
1.2.8.3 New 0 MAINS SUPPLY as definition covering both AC and DC mains supply.
$ c# X* V) o4 B/ l7 F; n; J) _1.2.9.7 New 0 RMS WORKING VOLTAGE introduced as defined term. k9 ] Q/ p% J6 m- r! I4 R
1.2.10.4 New 0 SOLID INSULATION introduced as defined term.9 I! k0 ?1 D9 z4 O- g
1.2.13.15 New 0 CHEESECLOTH introduced as defined term.$ {; U; r0 I- z6 d
1.2.13.16 New 0 WRAPPING TISSUE introduced as defined term.2 o- b& B5 m, H+ s4 [4 @3 B4 j
1.2.13.17 New 0 PROTECTIVE CURRENT RATING introduced as defined term which is similar to
% m5 c/ u! @1 I/ E+ A/ M2 O4 jprevious term "current rating of the circuit under test" of subclause 2.6.3.4.
0 g% I2 u( b* F1.3.3 Clarified 1 If the test voltage is not specified in a test item the rated voltage or any value% [6 n( O% Q# q8 W3 @/ c K+ y
in the rated voltage range shall be used for test.4 Y# t- I, W" U% D; z% w. H% Q
1.4.8 Modified 1 "Note 2" added for additional requirements of USA and Canada for+ J2 _+ r' S% e8 b7 b
overvoltage protection of TNV circuits.; C j* Z" k7 g3 ^
1.4.14 Clarifi ed 1 Adding to third paragraph: "The failure of functional insulation is only
0 c/ v- s' X* c1 I, g! W5 v$ |3 Msimulated when required by 5.3.4 c)" (risk of fire, risk of electric shock).4 F" e+ t" a. a- e8 S4 R) R
1.5.1 Modified 0 Adding "Note 3" (Switzerland does not allow mercury switches) and deleting
5 ?: t' u+ I/ Y# ~second paragraph and old "Note 3".
6 w/ c7 o8 H2 |' c9 N5 T* L* @3 V: p# A1.5.6 Modified 0 Complete change of subclause by adding information from IEC 60384-14.
8 D* K; t9 A& \) zHowever, application principle of X- and Y-capacitors not changed.9 d8 R$ W7 O2 I+ `
1.5.7 Complete change and concept for bridging resistors. Detailed requirements
3 @" ^* y! x G0 c% P- _1 cfor:" K0 a/ n! E d
· Resistors bridging functional/basic/supplementary insulation (1.5.7.1)
! H l' j- q- s! m· Resistors double/reinforced functional insulation (1.5.7.2)+ f$ J5 X+ o9 z
· Resistors double/reinforced functional insulation – Special7 g0 Y: F" x3 _; Q
requirements when connected to antenna/coaxial cable (1.5.7.3)
: Q8 R+ k7 x" U6 K1.5.7.1 Only subclauses 2.10.3 and 2.10.4 (distances) apply to such resistors.
) k) M0 i4 B; i& c/ L- h9 ~6 e/ z1.5.7.2 Very different concept:9 h& q2 _4 a* e) v1 u6 t. ?* x6 e
· Single resistor is acceptable if it passes "Resistor test"$ Y6 L$ a+ e3 q+ H+ P; l
· Group of resistors must either pass "Resistor test" or pass subclauses
5 Q! @4 j. s! i( m2 s5 n$ }2.10.3 and 2.10.4 (distances) with each resistor short-circuited in turn
, K* C' V1 l3 }9 q2 H2 P"Resistor test":% I" |2 E( B4 v; d
Damp heat test of IEC 60068-2-78 plus impulse test and resistance
: Z% ~% o$ G7 B; X, [/ Mmeasurement.- v: I9 k w1 N3 x$ Q
1.5.7.3
0 ]* @! ^5 [; q: T( IModified 2! a# a+ f W' A: Z5 G! k' L
Same as 1.5.7.2 above but with different impulse generator for circuits with
0 b: C0 z6 S% r3 n" Ccoaxial cable connection.
u9 _) D; W: }; y( B6 f. Y9 h y1.5.9 Requirements for varistors (VDR) specified.
$ ~: D2 ?5 L& f8 F/ p6 I) m! o1.5.9.1 Secondary circuit surge suppressors: any suitable component allowed9 j9 ?; l; @) A% u# ~
Primary circuit surge suppressors: only VDR allowed.4 I, c$ D2 n" P! m; R2 ]
1.5.9.2 An interrupting means must be provided for protection of the VDR in series.) w7 S* W! q! J
1.5.9.3 It is allowed to bridge functional insulation by VDR, no additional
9 k( G6 f( l/ j( q- O1 Z2 i, P' g' L! Frequirements.
1 r) o( `3 h/ @) e1.5.9.4 It is allowed to bridge basic insulation by VDR with additional requirements:
6 o& X1 P1 d7 w( r' o/ E+ I· one side of the VDR must be earthed
0 @6 P: J! n8 B0 P/ M· only possible for pluggable equipment type B or permanently5 I; j) L# }, m8 o9 Q1 q1 A3 L( n
connected equipment or equipment with permanently connected" M# |2 T, g# E ^! Z0 Q! Q: L
earthing conductor
- k, w5 Q: C, O2 _; `· more restrictions for countries FI, NO, SE0 t/ q& P/ x/ Q, J
1.5.9.5
" b# [' }9 |) sNew 28 {0 A, n7 O- B7 L8 p% P
It is not allowed to bridge supplementary/double/reinforced insulation by0 U @! e7 C( @0 c: C
VDR.
3 Y% V, H' ~0 C1.6.1 Modified 0 "Note" for Australian national difference was deleted.
4 z u( x, Q$ W E! C1.7.1 Clarified 0 Clarification for the use of the Class II symbol.
/ C- X8 a: z `3 e1.7.2 Modified 0 Re-arranging of content of subclauses 1.7.2, 1.7.10 and 1.7.16. |
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