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Differences between "IEC 60950-1:2001" and "IEC 60950-1:2005"' b; R: Y" Y* D7 i$ N, _ ^
? : Level of importance (0=not, 3=very) Page 3 of 20 Document date: 4-Apr-2006
/ }8 t* q0 x6 W; U; C! s+ d/ G. k. GSubclause Change ? Comment
1 d0 v3 j1 \/ i3 |Foreword Added 0 Additional parts "22" and "23" mentioned that are planned but not published
9 z" t( O* i5 \% myet (Mar-2006).
2 z" Z7 B8 k" V5 X1.1.1 Clarified 2 IEC 60950-1 applies as well to components and subassemblies intended for
" B) V6 E" V( a( Jincorporation in ITE.
) H7 j2 ?! V9 T& f$ t3 k+ @1.1.3 Modified 1 "Support systems" were deleted from list of excluded examples.5 A* ], t+ B D1 V4 E1 |. z
1.2.2.3 New 1 RATED RESTING TIME replaces subclauses 1.2.2.3~5 (CONTINUOUS OPERATION,7 t- h1 }5 B' h/ l
SHORT-TIME OPERATION and INTERMITTENT OPERATION).* J0 o5 S0 k7 A M3 y
1.2.5.3 New 0 PLUGGABLE EQUIPMENT as definition covering both pluggable equipment types0 @' F7 ~5 [/ S/ k, Y0 e
A and B.
- j; t; z* W, N+ E4 W8 y1.2.8.3 New 0 MAINS SUPPLY as definition covering both AC and DC mains supply.
; n1 l% U+ [: C- A$ H, a1.2.9.7 New 0 RMS WORKING VOLTAGE introduced as defined term.- T6 |! x$ P- r4 p% N9 k: o4 d: t# S
1.2.10.4 New 0 SOLID INSULATION introduced as defined term.
" @5 n, t; k3 n' E6 g3 }1.2.13.15 New 0 CHEESECLOTH introduced as defined term.
0 `' W! z+ N( H4 M) {5 f0 `1.2.13.16 New 0 WRAPPING TISSUE introduced as defined term.
2 S3 u( ]! v: i: e2 P2 X1.2.13.17 New 0 PROTECTIVE CURRENT RATING introduced as defined term which is similar to
. x; ?( d7 W4 o: b$ Jprevious term "current rating of the circuit under test" of subclause 2.6.3.4.
! d8 q6 y# A1 t1.3.3 Clarified 1 If the test voltage is not specified in a test item the rated voltage or any value
H! m4 E, D! z H% P& f2 W1 {in the rated voltage range shall be used for test.7 r) a7 i* v# i- P
1.4.8 Modified 1 "Note 2" added for additional requirements of USA and Canada for
" n0 u9 Q5 c3 E R$ R" kovervoltage protection of TNV circuits.$ w' J, W9 d0 u0 k: p
1.4.14 Clarifi ed 1 Adding to third paragraph: "The failure of functional insulation is only( p4 B" z8 R/ F5 S
simulated when required by 5.3.4 c)" (risk of fire, risk of electric shock).# b: @* F% p/ X' | w/ M
1.5.1 Modified 0 Adding "Note 3" (Switzerland does not allow mercury switches) and deleting2 K: d" k8 E; I7 t8 Q% O& b, X
second paragraph and old "Note 3".
( ]& x. ]) @; G, T+ V5 C1.5.6 Modified 0 Complete change of subclause by adding information from IEC 60384-14. G+ D. d2 P+ n, H
However, application principle of X- and Y-capacitors not changed.
' P8 u, P1 z! s1 x7 _( L1.5.7 Complete change and concept for bridging resistors. Detailed requirements* M, v# ~& Y N9 }- ]. R
for:
( e' [# ^& A& X+ K# i0 o- N· Resistors bridging functional/basic/supplementary insulation (1.5.7.1)' s% G6 Q9 @0 Q+ e; K6 T
· Resistors double/reinforced functional insulation (1.5.7.2)
. [: }' a, J" b# K7 Q: u· Resistors double/reinforced functional insulation – Special
0 ]& ]9 {1 D5 e3 g' k4 Lrequirements when connected to antenna/coaxial cable (1.5.7.3)' r; G9 a' A0 v4 |/ s
1.5.7.1 Only subclauses 2.10.3 and 2.10.4 (distances) apply to such resistors.
" `) O1 Q) x/ W. |% Y0 {$ K% E0 G1.5.7.2 Very different concept:
" H# M. [- T- y3 @$ [· Single resistor is acceptable if it passes "Resistor test"
$ D' W5 @% y, i$ W" V% m# N" X6 P· Group of resistors must either pass "Resistor test" or pass subclauses$ q: U! s' K! Z+ G
2.10.3 and 2.10.4 (distances) with each resistor short-circuited in turn, b2 W* Q2 @* S
"Resistor test":
w, ?, W1 a% @Damp heat test of IEC 60068-2-78 plus impulse test and resistance7 c8 D& p$ i, ]
measurement. S' I1 d) w4 L
1.5.7.36 s4 S1 u5 J- K& V; W# \& n# Z- b
Modified 21 Z/ D8 U7 M# Y2 B
Same as 1.5.7.2 above but with different impulse generator for circuits with# h, K+ {( I8 q7 U* ?+ b" E
coaxial cable connection.; q. Q5 c# Y3 V2 I+ [$ o
1.5.9 Requirements for varistors (VDR) specified.2 `. l7 o2 }) ^ l( H( E3 O/ Y
1.5.9.1 Secondary circuit surge suppressors: any suitable component allowed
/ D O+ n/ p0 U# b, E9 g& A6 FPrimary circuit surge suppressors: only VDR allowed.
( F( M9 N5 x) e. M- _1.5.9.2 An interrupting means must be provided for protection of the VDR in series.
9 X2 Y; x3 H9 B1.5.9.3 It is allowed to bridge functional insulation by VDR, no additional/ q, |& [2 l0 t6 h b
requirements.
* H# q' E8 L7 M5 S E1 H3 o) K1.5.9.4 It is allowed to bridge basic insulation by VDR with additional requirements:
- S T- ?& y9 }8 E2 z9 H· one side of the VDR must be earthed" s8 ^/ Y7 x; |4 E% X3 ?0 O/ t& F
· only possible for pluggable equipment type B or permanently! O9 z6 v1 b6 X# [* ]
connected equipment or equipment with permanently connected
/ ~9 I9 g6 G1 uearthing conductor+ c% s$ f. P/ r- l
· more restrictions for countries FI, NO, SE
# U4 t/ x+ M7 J7 E) ~1.5.9.59 Y' r7 X, a1 \; W7 \4 ?
New 2* e7 b9 k6 g$ j( k! z. g
It is not allowed to bridge supplementary/double/reinforced insulation by
& G5 W1 b0 \' s( g7 q4 h! ?. [VDR.* N' w: E7 C* d
1.6.1 Modified 0 "Note" for Australian national difference was deleted.
' ?5 M" M, T0 Q, ^- }1.7.1 Clarified 0 Clarification for the use of the Class II symbol.
2 i1 z8 m( x( Y1.7.2 Modified 0 Re-arranging of content of subclauses 1.7.2, 1.7.10 and 1.7.16. |
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