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Differences between "IEC 60950-1:2001" and "IEC 60950-1:2005"
! O9 E5 `, p/ t# [7 ?. K9 M* e? : Level of importance (0=not, 3=very) Page 3 of 20 Document date: 4-Apr-2006& Y" u; h( F' F, j
Subclause Change ? Comment
. ?# h, R) \8 m g& ]Foreword Added 0 Additional parts "22" and "23" mentioned that are planned but not published/ S: D% o5 \' r
yet (Mar-2006).: P* {% P: P$ q# s) l
1.1.1 Clarified 2 IEC 60950-1 applies as well to components and subassemblies intended for
_, i( W3 w; _$ Hincorporation in ITE.' q, `) J4 L1 R' B# e: @
1.1.3 Modified 1 "Support systems" were deleted from list of excluded examples.* ]/ R* n) q: f( l; B& Z
1.2.2.3 New 1 RATED RESTING TIME replaces subclauses 1.2.2.3~5 (CONTINUOUS OPERATION,
! a7 h; e& ?' u" `* p' K$ ]* l4 aSHORT-TIME OPERATION and INTERMITTENT OPERATION). V! o: q: r" z, q; N$ B F1 W
1.2.5.3 New 0 PLUGGABLE EQUIPMENT as definition covering both pluggable equipment types
3 C7 j8 k8 H U$ QA and B.$ ~" {. l/ }- K. ]' I9 d5 z3 [
1.2.8.3 New 0 MAINS SUPPLY as definition covering both AC and DC mains supply.$ q, l5 g* N% z4 w8 O2 N. m
1.2.9.7 New 0 RMS WORKING VOLTAGE introduced as defined term.- j3 o/ r& K1 z4 V4 w
1.2.10.4 New 0 SOLID INSULATION introduced as defined term.
2 y; `2 I2 y: E/ [7 q/ l4 t1.2.13.15 New 0 CHEESECLOTH introduced as defined term.7 G" u U+ `; \; G3 R8 X0 K4 H
1.2.13.16 New 0 WRAPPING TISSUE introduced as defined term.$ b4 K9 ]& `; r
1.2.13.17 New 0 PROTECTIVE CURRENT RATING introduced as defined term which is similar to
% F) ~& T$ ]! |3 S# y4 g' Rprevious term "current rating of the circuit under test" of subclause 2.6.3.4.
& z5 Y9 d- h% i# z9 L1.3.3 Clarified 1 If the test voltage is not specified in a test item the rated voltage or any value
b1 R- ]1 _! Din the rated voltage range shall be used for test.) L/ Q% N* f1 `% v1 w* D0 i/ x
1.4.8 Modified 1 "Note 2" added for additional requirements of USA and Canada for: B5 N2 G5 b( Z% Y( b7 `
overvoltage protection of TNV circuits.
( c0 k/ `# [+ n% Z* v4 P% f4 T/ c1.4.14 Clarifi ed 1 Adding to third paragraph: "The failure of functional insulation is only" o" v: q/ y% N" G' P0 i$ ?
simulated when required by 5.3.4 c)" (risk of fire, risk of electric shock).& M- V" p5 Z( ]
1.5.1 Modified 0 Adding "Note 3" (Switzerland does not allow mercury switches) and deleting
, D) q3 q# {6 ^& J& Ssecond paragraph and old "Note 3".
3 ~3 f4 q; \5 N; G1.5.6 Modified 0 Complete change of subclause by adding information from IEC 60384-14.
0 T& Z: _" s3 q+ t! q3 V" NHowever, application principle of X- and Y-capacitors not changed.
4 C& m' q4 h/ q. i" |1.5.7 Complete change and concept for bridging resistors. Detailed requirements1 j+ f3 t( O6 G, A$ W1 E* w& S
for:
* n- s7 {, N) G8 Z4 p4 y, v. s· Resistors bridging functional/basic/supplementary insulation (1.5.7.1)2 C4 U* S- ?. b' u" ^, F2 L" ~1 c% K
· Resistors double/reinforced functional insulation (1.5.7.2)' I/ c/ `. B2 h2 V
· Resistors double/reinforced functional insulation – Special/ [8 B/ f+ [7 p) P2 A. x5 N4 p
requirements when connected to antenna/coaxial cable (1.5.7.3)
( y. V+ s( G5 |, h1.5.7.1 Only subclauses 2.10.3 and 2.10.4 (distances) apply to such resistors.: j& ?) y S/ y/ m
1.5.7.2 Very different concept:& N! d8 n t$ C$ y8 E2 W. ^+ D" y# l
· Single resistor is acceptable if it passes "Resistor test"
1 |' F+ v& ^ f$ a8 z' j· Group of resistors must either pass "Resistor test" or pass subclauses u' ?6 [2 o3 m; _: L/ z; A* h
2.10.3 and 2.10.4 (distances) with each resistor short-circuited in turn2 Z3 ~5 |/ Q5 C: n# E
"Resistor test":
3 F% D" l/ [: M2 [8 L' K8 ADamp heat test of IEC 60068-2-78 plus impulse test and resistance4 R" ^4 Q5 x5 J/ b* E1 }5 ~
measurement.; k6 I) `0 N% j; `
1.5.7.3
' z* i2 {- o; \3 H9 ^. UModified 2
j- c' h( Y! C' n7 KSame as 1.5.7.2 above but with different impulse generator for circuits with
5 ]. ]/ n! t" }3 G; ~, U- e# Rcoaxial cable connection.
+ P- n9 S$ P1 J' h; Y0 q2 \' _) H1.5.9 Requirements for varistors (VDR) specified.- f/ v- P; X# X
1.5.9.1 Secondary circuit surge suppressors: any suitable component allowed8 ?3 i* s5 U! C" i) V
Primary circuit surge suppressors: only VDR allowed.
: l5 E0 @& x3 W+ T4 S. R9 q% a1.5.9.2 An interrupting means must be provided for protection of the VDR in series.+ p+ ~( v1 `; U5 \+ g# U: _
1.5.9.3 It is allowed to bridge functional insulation by VDR, no additional$ m1 K' n6 m( q
requirements.
# s0 Y9 X, u; n1 [( V$ {1.5.9.4 It is allowed to bridge basic insulation by VDR with additional requirements:: u5 n: L# G2 M9 Y0 b
· one side of the VDR must be earthed
5 v: q; O2 O* L· only possible for pluggable equipment type B or permanently
8 J6 o J6 t! t& b* e9 E/ G* \. q; Oconnected equipment or equipment with permanently connected
1 d$ B* q2 H1 _& }. V5 ~) j3 p' X: bearthing conductor3 X0 t2 W0 Q8 }+ Y7 O( G0 U
· more restrictions for countries FI, NO, SE: _: b' P" ` o5 T% m; ? f: U, E) A" }
1.5.9.5* f. @# W3 B; d1 K1 i* R
New 2) _7 c! v; T& l
It is not allowed to bridge supplementary/double/reinforced insulation by; W9 }5 {) O% C! U% J9 d
VDR.: g: {& }1 F0 b% N8 S9 q7 N
1.6.1 Modified 0 "Note" for Australian national difference was deleted.5 d8 p1 Z& K- ]- x, G
1.7.1 Clarified 0 Clarification for the use of the Class II symbol.
8 z, N) Z# R) f; w& q6 @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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