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Differences between "IEC 60950-1:2001" and "IEC 60950-1:2005"
) P# \. M8 Y" ~3 u? : Level of importance (0=not, 3=very) Page 3 of 20 Document date: 4-Apr-2006$ N3 E& V7 d8 |9 `% C& M" G- @
Subclause Change ? Comment) H8 T9 H8 f& E; b% A
Foreword Added 0 Additional parts "22" and "23" mentioned that are planned but not published
& Z$ R& v4 H3 G- X4 w0 kyet (Mar-2006).
# Z) ?+ i5 r% ?( Y& A/ b! S1.1.1 Clarified 2 IEC 60950-1 applies as well to components and subassemblies intended for
- H+ o0 q- o* f5 h+ F! Z u t8 cincorporation in ITE./ ?: h5 C, n, b) K) k3 W
1.1.3 Modified 1 "Support systems" were deleted from list of excluded examples.
- f- O$ Y, ~/ q0 z1.2.2.3 New 1 RATED RESTING TIME replaces subclauses 1.2.2.3~5 (CONTINUOUS OPERATION,
% L) Y9 {- v0 H1 j. D, b! W/ @SHORT-TIME OPERATION and INTERMITTENT OPERATION).
( }& r: V7 B$ @+ Q. F" q$ ]) L2 X1.2.5.3 New 0 PLUGGABLE EQUIPMENT as definition covering both pluggable equipment types
1 i6 H/ i5 B1 c6 V pA and B.
" e1 g5 J$ [; w6 Y3 }- F1.2.8.3 New 0 MAINS SUPPLY as definition covering both AC and DC mains supply. @! v: G' _/ L U* z: Z' A
1.2.9.7 New 0 RMS WORKING VOLTAGE introduced as defined term.
& U- z. r( p3 ^& I6 e4 }1.2.10.4 New 0 SOLID INSULATION introduced as defined term.( n- L2 G" `7 I" L) H. q
1.2.13.15 New 0 CHEESECLOTH introduced as defined term.3 w6 ?7 `% b: ?# n( L8 ]( I$ W2 A
1.2.13.16 New 0 WRAPPING TISSUE introduced as defined term.
2 I# Y* u% O' m1.2.13.17 New 0 PROTECTIVE CURRENT RATING introduced as defined term which is similar to2 W( Q' F! w# k! B, b
previous term "current rating of the circuit under test" of subclause 2.6.3.4.* \6 m; Z& `2 O
1.3.3 Clarified 1 If the test voltage is not specified in a test item the rated voltage or any value
7 y" ^9 `) E* n" g# }( nin the rated voltage range shall be used for test.0 `( o3 [+ e4 s! ~- p( B
1.4.8 Modified 1 "Note 2" added for additional requirements of USA and Canada for
! `% z; |0 W" Tovervoltage protection of TNV circuits.
R. p9 T% A4 S9 \1.4.14 Clarifi ed 1 Adding to third paragraph: "The failure of functional insulation is only; N3 d4 ]6 ?$ O- U8 x# _8 w8 f3 W
simulated when required by 5.3.4 c)" (risk of fire, risk of electric shock).4 v1 l" p6 d7 x$ M. O
1.5.1 Modified 0 Adding "Note 3" (Switzerland does not allow mercury switches) and deleting
. B. J2 s3 _9 t! z5 nsecond paragraph and old "Note 3".
4 M. P6 o- r: C1.5.6 Modified 0 Complete change of subclause by adding information from IEC 60384-14., E% x6 i* V+ O" j2 P
However, application principle of X- and Y-capacitors not changed.
, f4 H D: v; m1 V1.5.7 Complete change and concept for bridging resistors. Detailed requirements/ f* v2 w* y: a" r/ b2 z8 C
for:
& S, b9 Y7 }, j$ E6 A: O3 q· Resistors bridging functional/basic/supplementary insulation (1.5.7.1)
& J8 m2 c) g( J: }* L7 c( h7 B· Resistors double/reinforced functional insulation (1.5.7.2)
( G- A. A% p- q( Q' ~· Resistors double/reinforced functional insulation – Special
6 w4 c }; [% {' ~& Irequirements when connected to antenna/coaxial cable (1.5.7.3)
. `3 P* V2 _% b1 x1.5.7.1 Only subclauses 2.10.3 and 2.10.4 (distances) apply to such resistors.
; u& ]& K8 R* S1.5.7.2 Very different concept:
) z) r' B: c* o; K: `· Single resistor is acceptable if it passes "Resistor test"
H* \2 D" d+ q( Q· Group of resistors must either pass "Resistor test" or pass subclauses' h m9 |2 Z# \6 Z, @3 T D
2.10.3 and 2.10.4 (distances) with each resistor short-circuited in turn. a/ H; l9 f8 s0 x4 r
"Resistor test":9 S4 P7 @% K1 @% O* ?
Damp heat test of IEC 60068-2-78 plus impulse test and resistance8 J, _. ~: }5 [
measurement.& F- Y7 [+ q; t" x
1.5.7.3* n5 {; a* X+ [! h& N2 T
Modified 2
, |/ z4 r; e( s6 ^! K: _4 w% tSame as 1.5.7.2 above but with different impulse generator for circuits with
`: ~. J% ~9 r3 C; P `3 [$ pcoaxial cable connection.4 I8 c8 g# c q/ W4 r/ B/ g
1.5.9 Requirements for varistors (VDR) specified.
3 D6 j( @ Z: o m1.5.9.1 Secondary circuit surge suppressors: any suitable component allowed1 J4 b, p- U4 v' i
Primary circuit surge suppressors: only VDR allowed.
) {, |! ^3 I8 I0 ~& |1.5.9.2 An interrupting means must be provided for protection of the VDR in series.
w" I, r$ o; t1 \6 A1.5.9.3 It is allowed to bridge functional insulation by VDR, no additional
/ K7 m" j# x0 i# I4 e0 Krequirements.1 _4 v% e/ p8 Z0 T$ r j! E
1.5.9.4 It is allowed to bridge basic insulation by VDR with additional requirements:6 \) D; s* @2 G
· one side of the VDR must be earthed
! e8 z( q: L l) }! `, X1 z2 c· only possible for pluggable equipment type B or permanently$ @2 S0 x! K% q5 e# K( Z: B! f9 s' [
connected equipment or equipment with permanently connected4 _9 n' Y3 H. s F) S
earthing conductor; ]7 j; D/ G. a' a
· more restrictions for countries FI, NO, SE
, X0 j8 w/ X5 R; F1.5.9.5* q; l4 @8 b4 e# U9 G
New 2& T1 D! t% @6 ]9 f, I
It is not allowed to bridge supplementary/double/reinforced insulation by. l0 u" w/ f6 u5 ^3 v% F
VDR.
9 W3 k) s: Q1 `- d! Z) O1.6.1 Modified 0 "Note" for Australian national difference was deleted.
4 m" l* x2 E9 j+ { ]1 ^ O1.7.1 Clarified 0 Clarification for the use of the Class II symbol.
8 F( _+ Q( `/ E/ r6 ?1.7.2 Modified 0 Re-arranging of content of subclauses 1.7.2, 1.7.10 and 1.7.16. |
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