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Differences between "IEC 60950-1:2001" and "IEC 60950-1:2005"
" Z' l5 X( _8 A, ` @3 u1 l# h? : Level of importance (0=not, 3=very) Page 3 of 20 Document date: 4-Apr-2006
% G6 Z! j7 L% f' J) T5 Z' q, S" gSubclause Change ? Comment: s4 X8 `2 Z0 O n/ q$ W w
Foreword Added 0 Additional parts "22" and "23" mentioned that are planned but not published, S/ i% l: g) i+ t+ y
yet (Mar-2006).
1 U; W$ o" W% _6 E- [$ I$ b1.1.1 Clarified 2 IEC 60950-1 applies as well to components and subassemblies intended for+ X5 M" j4 E- ]3 B( Y, k1 v
incorporation in ITE.# a" q/ _/ r7 |1 p- B7 F" \ P% b
1.1.3 Modified 1 "Support systems" were deleted from list of excluded examples.
/ O4 V0 O2 H% T6 S$ e% J1.2.2.3 New 1 RATED RESTING TIME replaces subclauses 1.2.2.3~5 (CONTINUOUS OPERATION,
7 S9 v" K0 B6 n* f8 k1 p; Z7 `SHORT-TIME OPERATION and INTERMITTENT OPERATION)., ^: a$ [8 E7 i# j
1.2.5.3 New 0 PLUGGABLE EQUIPMENT as definition covering both pluggable equipment types
: a; l6 F& ?8 u) X& iA and B.
# J; {/ C! Q, O9 b( b. }) P1.2.8.3 New 0 MAINS SUPPLY as definition covering both AC and DC mains supply./ s+ v$ z: J1 n+ E
1.2.9.7 New 0 RMS WORKING VOLTAGE introduced as defined term.
$ a% B) k# t& G' ^1.2.10.4 New 0 SOLID INSULATION introduced as defined term.
0 \2 P# s, P# ]& n% W Q1.2.13.15 New 0 CHEESECLOTH introduced as defined term.8 J5 P ?; X! D) n [$ l7 D
1.2.13.16 New 0 WRAPPING TISSUE introduced as defined term.
# r: X! @8 t X8 i* {9 i1.2.13.17 New 0 PROTECTIVE CURRENT RATING introduced as defined term which is similar to) }8 N3 H1 y6 U% f- L+ S, M' R
previous term "current rating of the circuit under test" of subclause 2.6.3.4.1 |6 q, s7 W& I# ~* l. V
1.3.3 Clarified 1 If the test voltage is not specified in a test item the rated voltage or any value
+ J- S8 n# N' T% k) h2 x1 }! U! `0 L9 Kin the rated voltage range shall be used for test.0 K% ` D/ M$ ?
1.4.8 Modified 1 "Note 2" added for additional requirements of USA and Canada for
5 y" s' N8 |6 S' V1 R6 Yovervoltage protection of TNV circuits.
, ]; Y- ?) N2 m3 U4 ?1.4.14 Clarifi ed 1 Adding to third paragraph: "The failure of functional insulation is only( u7 o+ n$ Z1 y" i' u; i$ y) ^
simulated when required by 5.3.4 c)" (risk of fire, risk of electric shock).# R* S/ H- W. k
1.5.1 Modified 0 Adding "Note 3" (Switzerland does not allow mercury switches) and deleting+ c7 ?2 ]! b8 Z4 N( {
second paragraph and old "Note 3".
8 A* e# Y- P' _) w2 @ [1.5.6 Modified 0 Complete change of subclause by adding information from IEC 60384-14.- q( k I4 u' R7 Z: z+ e
However, application principle of X- and Y-capacitors not changed.- }+ r; @$ }- h M) _, j$ ^# f
1.5.7 Complete change and concept for bridging resistors. Detailed requirements/ [& z3 M, ?. I1 q
for:
( g* b# n' T }# a· Resistors bridging functional/basic/supplementary insulation (1.5.7.1); X3 p: c9 [3 N+ V0 w. ~7 F
· Resistors double/reinforced functional insulation (1.5.7.2)
) Q1 G) ]7 N7 h7 s/ u1 Q$ c# i# }3 {· Resistors double/reinforced functional insulation – Special* z+ s& a3 R1 [& y
requirements when connected to antenna/coaxial cable (1.5.7.3)
+ t( f3 z6 ?" X7 e6 Z% X3 ]3 d1.5.7.1 Only subclauses 2.10.3 and 2.10.4 (distances) apply to such resistors., x2 }' y8 ?; V: O/ \; i9 P3 Y
1.5.7.2 Very different concept:& j& y- B/ h& }5 p7 l: W
· Single resistor is acceptable if it passes "Resistor test"
W( g1 g/ s5 o w9 p· Group of resistors must either pass "Resistor test" or pass subclauses
$ V5 {! O! ~. p2.10.3 and 2.10.4 (distances) with each resistor short-circuited in turn7 r) X! E' n- c! R, w; b& \" `- z
"Resistor test":: h8 q6 s1 ^( I e
Damp heat test of IEC 60068-2-78 plus impulse test and resistance' ]0 d$ K) m: `- r: @
measurement.: S7 b8 N* m2 w: \- ~+ p
1.5.7.3
" Z m8 G$ j, Y6 B' a1 t RModified 2
" b0 w. l' S- n$ P3 iSame as 1.5.7.2 above but with different impulse generator for circuits with3 H0 ^8 o9 u# J
coaxial cable connection.
M$ l4 O5 f i5 t: n, Y4 [1.5.9 Requirements for varistors (VDR) specified.- O- H- T/ E3 U8 x. i% n
1.5.9.1 Secondary circuit surge suppressors: any suitable component allowed+ y( ~+ `1 R' g) g* l/ Y3 d
Primary circuit surge suppressors: only VDR allowed.
) e$ K# j+ Q" B6 [1 ^1.5.9.2 An interrupting means must be provided for protection of the VDR in series./ G$ p8 b# h& Y8 l+ _2 F) m1 A
1.5.9.3 It is allowed to bridge functional insulation by VDR, no additional
6 Y( c6 E, y: i- a/ u" l2 _- irequirements.( @# l8 w, F2 f X5 w
1.5.9.4 It is allowed to bridge basic insulation by VDR with additional requirements:
3 ^% o- V- y1 Q/ F/ K/ b2 u, g# R· one side of the VDR must be earthed
, `/ \4 V5 W7 r2 h· only possible for pluggable equipment type B or permanently
, B; S2 B' j T* C) xconnected equipment or equipment with permanently connected( h( E9 a- }3 X6 B/ u
earthing conductor
R7 V# @* u$ k# V3 m· more restrictions for countries FI, NO, SE
" g/ t1 N' v; L, t) `# D1.5.9.5
' A9 ^# }7 d0 r, i: \& N; RNew 2
# E1 h& A4 M% e. j# x8 cIt is not allowed to bridge supplementary/double/reinforced insulation by
" D! b7 d5 }- r- g( hVDR.! |3 N( g' d6 Q# |3 D
1.6.1 Modified 0 "Note" for Australian national difference was deleted.6 I1 }# c8 O" y0 _" j8 t( N1 g
1.7.1 Clarified 0 Clarification for the use of the Class II symbol./ H& k/ `) p8 Y# X4 J
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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