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Differences between "IEC 60950-1:2001" and "IEC 60950-1:2005"/ b* I9 e# O! {& U, ]& }) z
? : Level of importance (0=not, 3=very) Page 3 of 20 Document date: 4-Apr-20065 P0 _! `3 z7 d* s$ H8 G; ~
Subclause Change ? Comment
' b3 A( E+ \/ o {/ UForeword Added 0 Additional parts "22" and "23" mentioned that are planned but not published5 C( |5 G- ?. a$ D) b
yet (Mar-2006).7 ^/ F* P& I7 c" T0 Z/ j
1.1.1 Clarified 2 IEC 60950-1 applies as well to components and subassemblies intended for
3 \# Z# M4 H1 E% U, a' Sincorporation in ITE.4 i5 `0 G* ^4 a( x+ V8 C
1.1.3 Modified 1 "Support systems" were deleted from list of excluded examples.
6 o8 t' ^4 d9 v5 A7 P1.2.2.3 New 1 RATED RESTING TIME replaces subclauses 1.2.2.3~5 (CONTINUOUS OPERATION,! n S/ o. K$ ~/ E. [* P& n
SHORT-TIME OPERATION and INTERMITTENT OPERATION).& ^( X: k" C0 Q0 w+ O) r$ T" L
1.2.5.3 New 0 PLUGGABLE EQUIPMENT as definition covering both pluggable equipment types
m" P( r9 P3 q. h; m/ _$ H: q- ]A and B.7 w! }' \, X) W, x' D% k
1.2.8.3 New 0 MAINS SUPPLY as definition covering both AC and DC mains supply.
% J- e/ ~9 V( a# p% z1.2.9.7 New 0 RMS WORKING VOLTAGE introduced as defined term.
4 K1 w) m7 j9 h O- D1.2.10.4 New 0 SOLID INSULATION introduced as defined term.+ u( B0 N$ R3 @! b) g0 R" U
1.2.13.15 New 0 CHEESECLOTH introduced as defined term.- E' a' y& [" {( @) I3 H
1.2.13.16 New 0 WRAPPING TISSUE introduced as defined term.1 u2 u+ Y; V& C
1.2.13.17 New 0 PROTECTIVE CURRENT RATING introduced as defined term which is similar to! {8 G$ A& r; S. [. n/ y! \' r- g
previous term "current rating of the circuit under test" of subclause 2.6.3.4.
$ k! C; x5 i5 C/ W9 O8 ^1.3.3 Clarified 1 If the test voltage is not specified in a test item the rated voltage or any value# ^0 s* n/ \! f+ u2 ]
in the rated voltage range shall be used for test.
" a u/ \1 t0 ]1.4.8 Modified 1 "Note 2" added for additional requirements of USA and Canada for
5 x8 g* K' [$ @overvoltage protection of TNV circuits.7 N" H6 q. [9 \! H) M, J! e
1.4.14 Clarifi ed 1 Adding to third paragraph: "The failure of functional insulation is only; @1 g) y/ @' X
simulated when required by 5.3.4 c)" (risk of fire, risk of electric shock).
* v& ?% }( C; C B: ~0 Q: p1.5.1 Modified 0 Adding "Note 3" (Switzerland does not allow mercury switches) and deleting
( _- U# @4 k7 n! i% c1 q) ]second paragraph and old "Note 3".) d5 y( C# @9 y5 P4 |- s+ W( t
1.5.6 Modified 0 Complete change of subclause by adding information from IEC 60384-14.
3 Q& Z2 u" c! s8 pHowever, application principle of X- and Y-capacitors not changed.: O/ z2 @7 m: W* L0 P
1.5.7 Complete change and concept for bridging resistors. Detailed requirements
' a; y6 X+ j6 o3 qfor:
$ P8 V6 o( Z7 d+ a1 S5 e· Resistors bridging functional/basic/supplementary insulation (1.5.7.1)
2 q% F- n9 `5 _; c' a2 S8 D· Resistors double/reinforced functional insulation (1.5.7.2)
5 n+ G' Y! k& k S9 f· Resistors double/reinforced functional insulation – Special
3 M p* Z$ w; T6 Grequirements when connected to antenna/coaxial cable (1.5.7.3)
( k/ x$ S$ \7 }6 j- ?( ^# m0 D- R1.5.7.1 Only subclauses 2.10.3 and 2.10.4 (distances) apply to such resistors.
+ q5 s$ C. J. K! D* m& s1.5.7.2 Very different concept:, ]. M: s- B% u
· Single resistor is acceptable if it passes "Resistor test"
8 D, k; p7 R" }+ `· Group of resistors must either pass "Resistor test" or pass subclauses- ?+ u: h$ @( j1 r' A
2.10.3 and 2.10.4 (distances) with each resistor short-circuited in turn' H$ j0 A* B4 \4 K5 Q# a
"Resistor test":. h/ t2 K3 x* C, l
Damp heat test of IEC 60068-2-78 plus impulse test and resistance
+ r) Z( k1 q5 C4 Ameasurement.
9 p4 b. |$ q, ?1.5.7.3
: Q0 n9 q; [# }/ wModified 2
; m8 W+ o8 l8 o: c( gSame as 1.5.7.2 above but with different impulse generator for circuits with
- l! V f: f. S- w( n! rcoaxial cable connection.
5 r( L+ g! b9 E# z+ H1 w" k4 s1.5.9 Requirements for varistors (VDR) specified.
0 s. g% u# i: h$ ?% U. k4 h* ]1.5.9.1 Secondary circuit surge suppressors: any suitable component allowed2 i2 M/ K" c8 q+ v
Primary circuit surge suppressors: only VDR allowed.2 F! f! a) f+ `
1.5.9.2 An interrupting means must be provided for protection of the VDR in series.
& @% | u$ Q1 R* q# W g1.5.9.3 It is allowed to bridge functional insulation by VDR, no additional
: e8 b4 e/ y" V$ `& J4 crequirements.
) E. K7 U& J7 w' M) l* E1.5.9.4 It is allowed to bridge basic insulation by VDR with additional requirements:
/ h5 V3 J, k. B. D% N3 m· one side of the VDR must be earthed; i4 ?# y, }$ Y3 y
· only possible for pluggable equipment type B or permanently$ H" Y+ R% W) W
connected equipment or equipment with permanently connected
# }; }$ `9 Y5 E( Y. uearthing conductor# g* K( A) a8 u t8 k- `
· more restrictions for countries FI, NO, SE
5 z8 p* [$ k" w- U1.5.9.55 i: e- }% q; q V' g$ [5 i8 H
New 2
0 N. I9 t2 ?7 ^( zIt is not allowed to bridge supplementary/double/reinforced insulation by
, S% ]/ X m5 W2 X) k. pVDR.
) H1 n1 Q2 k5 r8 F( B- e' J1.6.1 Modified 0 "Note" for Australian national difference was deleted.
) `/ ? s8 _3 \3 p' A! \1.7.1 Clarified 0 Clarification for the use of the Class II symbol.
& k( R p7 B' T6 w- L$ x/ q6 I* }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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