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Differences between "IEC 60950-1:2001" and "IEC 60950-1:2005"
; d/ L, h3 H3 q3 ]? : Level of importance (0=not, 3=very) Page 3 of 20 Document date: 4-Apr-2006
1 R8 a% x! g" X5 bSubclause Change ? Comment1 N+ D0 T$ f1 z, N* _; U
Foreword Added 0 Additional parts "22" and "23" mentioned that are planned but not published
! I7 f8 B- W2 kyet (Mar-2006).
8 o$ f' O! u$ ?9 x1.1.1 Clarified 2 IEC 60950-1 applies as well to components and subassemblies intended for
/ A$ e# K" P0 K( v$ M. nincorporation in ITE.
; k) G* y, x. I, d; @3 }1.1.3 Modified 1 "Support systems" were deleted from list of excluded examples.
( V- b1 G6 G4 F9 \+ V0 E1.2.2.3 New 1 RATED RESTING TIME replaces subclauses 1.2.2.3~5 (CONTINUOUS OPERATION,# M' f; y' Y) |
SHORT-TIME OPERATION and INTERMITTENT OPERATION).* ^8 x R J: M& v J* r
1.2.5.3 New 0 PLUGGABLE EQUIPMENT as definition covering both pluggable equipment types3 j( `3 g3 C% R: G: r2 V: G
A and B.
9 Q4 e; S- D/ _: M% v8 f2 M1.2.8.3 New 0 MAINS SUPPLY as definition covering both AC and DC mains supply.
9 B" J: ]- T5 t1 A s1.2.9.7 New 0 RMS WORKING VOLTAGE introduced as defined term.8 k7 t! s8 W, M( I( r1 I
1.2.10.4 New 0 SOLID INSULATION introduced as defined term.' u! l, X& l$ p) a! M/ e: \
1.2.13.15 New 0 CHEESECLOTH introduced as defined term.
; s5 H8 K; p1 i( N2 F H; ?1.2.13.16 New 0 WRAPPING TISSUE introduced as defined term.
. R3 C& m+ Q" @ G) s0 L1.2.13.17 New 0 PROTECTIVE CURRENT RATING introduced as defined term which is similar to6 ^' b, q* F' U) H! O/ A( `* U
previous term "current rating of the circuit under test" of subclause 2.6.3.4.
% v* f9 s5 ^: l0 W1.3.3 Clarified 1 If the test voltage is not specified in a test item the rated voltage or any value
, y' O$ H& H* Y0 ~( C( s+ x3 ain the rated voltage range shall be used for test.9 D8 c0 A6 H0 {2 I1 m
1.4.8 Modified 1 "Note 2" added for additional requirements of USA and Canada for: |/ v* z. n7 }: l" ]; _7 c
overvoltage protection of TNV circuits.+ M& `8 W# L6 I
1.4.14 Clarifi ed 1 Adding to third paragraph: "The failure of functional insulation is only$ s2 q! d( Z1 j' K
simulated when required by 5.3.4 c)" (risk of fire, risk of electric shock).
' C" H/ ?4 a, u, }. G/ K' X1.5.1 Modified 0 Adding "Note 3" (Switzerland does not allow mercury switches) and deleting: [$ M+ I# G8 T4 r, P
second paragraph and old "Note 3".
! f% J/ g7 ?% f: |1.5.6 Modified 0 Complete change of subclause by adding information from IEC 60384-14.$ a5 c: `9 a& q
However, application principle of X- and Y-capacitors not changed.
[3 W4 e4 O* d. I+ t1.5.7 Complete change and concept for bridging resistors. Detailed requirements
% N: \# c5 G# g0 j( Xfor:! {& W% [0 D5 B% J
· Resistors bridging functional/basic/supplementary insulation (1.5.7.1)
( d. B0 f1 L2 T9 \· Resistors double/reinforced functional insulation (1.5.7.2)9 J7 A% Z5 f& ]1 v/ \
· Resistors double/reinforced functional insulation – Special; m9 f% u5 ?! T/ f7 s& b* d$ H
requirements when connected to antenna/coaxial cable (1.5.7.3)
7 X/ ]; C6 L5 {: l2 q/ U1.5.7.1 Only subclauses 2.10.3 and 2.10.4 (distances) apply to such resistors.
2 ^" O) b% a5 G# [1.5.7.2 Very different concept:& X. t# K' R2 u1 u7 a# V* k8 a
· Single resistor is acceptable if it passes "Resistor test"
$ x8 W; @1 V! e- N6 i7 l3 c* \2 T4 M· Group of resistors must either pass "Resistor test" or pass subclauses
/ b1 \6 {. h8 u- Y B8 U* u; [2.10.3 and 2.10.4 (distances) with each resistor short-circuited in turn1 G) c. R/ J8 ?' U! {
"Resistor test":
/ P" ~2 H- t; w4 u8 E- D" wDamp heat test of IEC 60068-2-78 plus impulse test and resistance$ a s" u. ~% X
measurement.: r* r; W- D( Y5 ?
1.5.7.34 `. Q* M3 h1 \
Modified 2
, y* P, `0 N! |/ A- XSame as 1.5.7.2 above but with different impulse generator for circuits with. Z4 \6 Q# P* _3 f% X
coaxial cable connection.
; B! [* j- [& |( K# c9 u- G( g1.5.9 Requirements for varistors (VDR) specified.
" p# Q) F4 d% k' y* I. q1.5.9.1 Secondary circuit surge suppressors: any suitable component allowed$ D( r; l5 p* m/ d2 ~# A- T
Primary circuit surge suppressors: only VDR allowed.# X L- p k* ~5 [: e6 L7 G: p; N) w
1.5.9.2 An interrupting means must be provided for protection of the VDR in series.
4 C4 H9 B# a' D- K. B: a/ k6 [1.5.9.3 It is allowed to bridge functional insulation by VDR, no additional+ n4 x# ^4 E8 u( ~' H9 R
requirements.
$ s' z5 s) v+ s/ D9 g( i1.5.9.4 It is allowed to bridge basic insulation by VDR with additional requirements:+ P; s3 h; |2 r( f* G
· one side of the VDR must be earthed
) K# W; c- \6 L- {2 w" `' v! Q' n# p, Y. {· only possible for pluggable equipment type B or permanently
, e" m9 t5 `+ H- {% Fconnected equipment or equipment with permanently connected
$ [2 ~2 b& K2 T' ~& searthing conductor, Y) H6 J: U0 u0 V
· more restrictions for countries FI, NO, SE* `) [# A3 K/ r6 `
1.5.9.5
4 D7 u4 n8 Z' K$ X4 }# hNew 2
. ^7 {: \& s/ h0 \It is not allowed to bridge supplementary/double/reinforced insulation by! o* }& H1 ]4 Y0 r+ V5 k
VDR.
3 r8 o1 M# h4 h" |1.6.1 Modified 0 "Note" for Australian national difference was deleted.6 R7 C" p* N+ ]
1.7.1 Clarified 0 Clarification for the use of the Class II symbol.; I' ^1 q2 T6 R: T' k
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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