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Differences between "IEC 60950-1:2001" and "IEC 60950-1:2005"
: A" u) n' ?' w& N? : Level of importance (0=not, 3=very) Page 3 of 20 Document date: 4-Apr-2006/ {4 M. D% P2 d0 o0 W! E, k
Subclause Change ? Comment+ E: E5 g+ m L( J9 x2 E4 L& ] p/ E
Foreword Added 0 Additional parts "22" and "23" mentioned that are planned but not published9 z# M" M8 t0 o8 B5 }, W0 T- N# u
yet (Mar-2006).
2 f- P" a6 F2 J; n1.1.1 Clarified 2 IEC 60950-1 applies as well to components and subassemblies intended for6 A$ E' {0 F" g2 ~, C
incorporation in ITE.8 {) s: b6 f- l' N, U" w! r
1.1.3 Modified 1 "Support systems" were deleted from list of excluded examples.
. j& p/ D ]3 e/ ?* ?1.2.2.3 New 1 RATED RESTING TIME replaces subclauses 1.2.2.3~5 (CONTINUOUS OPERATION,
. r- F, N, m" R) p* x s ISHORT-TIME OPERATION and INTERMITTENT OPERATION).
( D5 G: J1 K, E6 |/ T1.2.5.3 New 0 PLUGGABLE EQUIPMENT as definition covering both pluggable equipment types
- |( u [9 i3 n% |. XA and B." J9 V+ \8 ^' Z. q8 U0 Q" B7 ^
1.2.8.3 New 0 MAINS SUPPLY as definition covering both AC and DC mains supply.( z6 w. A# t, J: a8 O0 ~; c
1.2.9.7 New 0 RMS WORKING VOLTAGE introduced as defined term.2 V: X- R& r" ?! j0 r# X( D
1.2.10.4 New 0 SOLID INSULATION introduced as defined term., m/ }/ m( V9 m, _; W. E0 V6 O+ j
1.2.13.15 New 0 CHEESECLOTH introduced as defined term.+ p9 C) u. z; O% c
1.2.13.16 New 0 WRAPPING TISSUE introduced as defined term.
: W+ r8 |" w2 T3 C5 t8 ]1.2.13.17 New 0 PROTECTIVE CURRENT RATING introduced as defined term which is similar to
2 ^ j. i+ I5 O6 g& Iprevious term "current rating of the circuit under test" of subclause 2.6.3.4. Q! L+ J) P& V! O: {/ x9 ^
1.3.3 Clarified 1 If the test voltage is not specified in a test item the rated voltage or any value* O: O- _+ b! K2 C) K
in the rated voltage range shall be used for test.& k/ \2 a( z( u0 S1 ]
1.4.8 Modified 1 "Note 2" added for additional requirements of USA and Canada for
$ j9 K1 P" U/ m3 j: f' k% movervoltage protection of TNV circuits.
! h9 `: p; t0 G" P* {1.4.14 Clarifi ed 1 Adding to third paragraph: "The failure of functional insulation is only
k3 i' G1 r9 |simulated when required by 5.3.4 c)" (risk of fire, risk of electric shock).
/ d w9 Q' l1 u" D* L9 B1.5.1 Modified 0 Adding "Note 3" (Switzerland does not allow mercury switches) and deleting4 }6 ^4 M8 Y5 i$ I* V* M- E* h
second paragraph and old "Note 3".: U9 f3 O6 S3 U* I Y
1.5.6 Modified 0 Complete change of subclause by adding information from IEC 60384-14.4 O* I, l9 |- o. L" a# J! Y' L& r
However, application principle of X- and Y-capacitors not changed.
. Q/ H2 o6 ]% Z4 R) m1.5.7 Complete change and concept for bridging resistors. Detailed requirements5 Q0 S' z8 y% T' [9 I4 k( y6 t9 G# H
for:
( ^& f+ N0 S) D& O3 c# s4 ?4 N· Resistors bridging functional/basic/supplementary insulation (1.5.7.1)
: _9 O4 s1 `5 R. l· Resistors double/reinforced functional insulation (1.5.7.2)
& u2 i2 z T# n I· Resistors double/reinforced functional insulation – Special
( F! v4 |5 C$ Q; H& ^; n# Rrequirements when connected to antenna/coaxial cable (1.5.7.3)
7 r8 T x* \5 u/ |6 l1.5.7.1 Only subclauses 2.10.3 and 2.10.4 (distances) apply to such resistors.4 f$ A" `5 ~7 H; y
1.5.7.2 Very different concept: t0 n0 h: [ k2 o# I: ?7 w: ?( C
· Single resistor is acceptable if it passes "Resistor test"
8 e4 P3 ? R* m8 b( Q· Group of resistors must either pass "Resistor test" or pass subclauses {( } x5 B$ O% F; B* n
2.10.3 and 2.10.4 (distances) with each resistor short-circuited in turn
6 C- A$ |* X, g! a! e! m/ Y"Resistor test":! r0 M! X3 X" K9 k8 L2 O# u
Damp heat test of IEC 60068-2-78 plus impulse test and resistance# |+ x4 z M# ]
measurement.
" F* b1 ?2 m3 f) Z1 b5 o1.5.7.3+ w* I* z# B& E; C# v2 f) |% {
Modified 2
0 A% P- u5 _1 U3 @4 }: b. K1 `Same as 1.5.7.2 above but with different impulse generator for circuits with# q. E& N8 J7 P* T e
coaxial cable connection.
" K) ~) q6 K% |4 x" U1.5.9 Requirements for varistors (VDR) specified.0 G+ |; p0 o. [3 e
1.5.9.1 Secondary circuit surge suppressors: any suitable component allowed7 }1 l1 J2 a* g& Z% Y; J; {5 i; u
Primary circuit surge suppressors: only VDR allowed., r! ^ y2 L3 {9 a! \2 C
1.5.9.2 An interrupting means must be provided for protection of the VDR in series.* Q) T, }2 x" ^' Y, o3 @0 u
1.5.9.3 It is allowed to bridge functional insulation by VDR, no additional
4 Y" y k: O; [3 q" K: b) t% F* Xrequirements. T4 O' h+ E9 H1 u3 ~* w* H- ~; ?
1.5.9.4 It is allowed to bridge basic insulation by VDR with additional requirements:6 r* z% U& P( x! e# |% r
· one side of the VDR must be earthed
- e: R* V b, y1 \! w· only possible for pluggable equipment type B or permanently
" A: }2 L9 d/ e$ Y. B5 [connected equipment or equipment with permanently connected6 e1 ~2 n/ `$ o; m: }7 L& i! u" {
earthing conductor$ ]6 D( D/ y; C5 @7 l# l! Y
· more restrictions for countries FI, NO, SE) i; z7 E, L) d' s. T" j
1.5.9.5
1 p# K- k" `; W, Z* mNew 2& e( u# z V" H1 T
It is not allowed to bridge supplementary/double/reinforced insulation by
: g6 x+ {) q0 x9 V4 [VDR.
- h2 q) P" o. p+ t0 ]1.6.1 Modified 0 "Note" for Australian national difference was deleted.. e" S# z2 i5 t$ y. E) H
1.7.1 Clarified 0 Clarification for the use of the Class II symbol.
3 a5 r& Z# k% J c+ i1.7.2 Modified 0 Re-arranging of content of subclauses 1.7.2, 1.7.10 and 1.7.16. |
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