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Differences between "IEC 60950-1:2001" and "IEC 60950-1:2005"9 X0 a3 O1 h% n% a- t
? : Level of importance (0=not, 3=very) Page 3 of 20 Document date: 4-Apr-2006
* L. ]0 b- c: p* K" N& D6 ^Subclause Change ? Comment1 d" M0 k% C/ v3 o
Foreword Added 0 Additional parts "22" and "23" mentioned that are planned but not published
" ~* X. Y- l+ a: Ayet (Mar-2006).
! K/ M3 W6 y2 l$ x/ h* ^ I1.1.1 Clarified 2 IEC 60950-1 applies as well to components and subassemblies intended for: A2 |: [8 k! W& E$ q8 |/ j
incorporation in ITE.
/ L8 @! H5 W2 D6 j6 K0 ~ m1.1.3 Modified 1 "Support systems" were deleted from list of excluded examples.7 E9 w% v, ~/ m$ ?
1.2.2.3 New 1 RATED RESTING TIME replaces subclauses 1.2.2.3~5 (CONTINUOUS OPERATION,
* h" y) r2 k6 p) M1 r2 T/ e0 _+ B' lSHORT-TIME OPERATION and INTERMITTENT OPERATION).
6 f6 T1 o# R. N% i% O$ _ ?4 x) y1.2.5.3 New 0 PLUGGABLE EQUIPMENT as definition covering both pluggable equipment types* d b* D' ^1 [& [. q) ^
A and B.# v8 j* t* P6 n2 O, {; u4 E3 b8 I
1.2.8.3 New 0 MAINS SUPPLY as definition covering both AC and DC mains supply.
2 j1 Z8 j- {0 _' g! b7 L3 w# U4 @5 x1.2.9.7 New 0 RMS WORKING VOLTAGE introduced as defined term.
) A& k+ ~& Q" a$ F$ [# R8 M8 u% w2 V1.2.10.4 New 0 SOLID INSULATION introduced as defined term.
( H( |5 d0 e ~4 e1.2.13.15 New 0 CHEESECLOTH introduced as defined term.
$ O1 j1 c |$ s8 B5 u6 C* I( n1.2.13.16 New 0 WRAPPING TISSUE introduced as defined term.
7 T0 f+ F, l* i6 q# V. t1.2.13.17 New 0 PROTECTIVE CURRENT RATING introduced as defined term which is similar to2 K6 B0 c' L/ e# }# k6 y8 l
previous term "current rating of the circuit under test" of subclause 2.6.3.4.5 w6 b& Y! w8 r
1.3.3 Clarified 1 If the test voltage is not specified in a test item the rated voltage or any value
' v- n: V6 |# Cin the rated voltage range shall be used for test.! ~' P' P; G. V
1.4.8 Modified 1 "Note 2" added for additional requirements of USA and Canada for
( @8 a8 ] p$ _3 ^9 b# P* ~$ C$ ?overvoltage protection of TNV circuits.
! N: b) U( \! j1.4.14 Clarifi ed 1 Adding to third paragraph: "The failure of functional insulation is only
" u+ J- q9 F- O2 B! w1 @simulated when required by 5.3.4 c)" (risk of fire, risk of electric shock).3 c' l6 k( z! k# S
1.5.1 Modified 0 Adding "Note 3" (Switzerland does not allow mercury switches) and deleting7 O7 a6 q j$ }" h, R a
second paragraph and old "Note 3".5 J8 g3 R6 n! [) p" n8 G
1.5.6 Modified 0 Complete change of subclause by adding information from IEC 60384-14.
9 u: \* ?' h! H; n+ U9 PHowever, application principle of X- and Y-capacitors not changed.# S) ]: J1 q% V) D
1.5.7 Complete change and concept for bridging resistors. Detailed requirements
; r' X8 S( ^% {for:; y3 j) \% z4 G3 w" m
· Resistors bridging functional/basic/supplementary insulation (1.5.7.1)6 h- w3 l. d" @) m
· Resistors double/reinforced functional insulation (1.5.7.2)
$ {6 G3 q: a4 f* W7 P$ ~/ b· Resistors double/reinforced functional insulation – Special
* I8 |, G3 p% B' y9 ?/ I/ R0 Vrequirements when connected to antenna/coaxial cable (1.5.7.3)
9 d/ n( }$ ^3 o: |, _) A& o1.5.7.1 Only subclauses 2.10.3 and 2.10.4 (distances) apply to such resistors.
' t+ C: A u! y/ r& W1.5.7.2 Very different concept:& i8 b5 U( H. u1 p
· Single resistor is acceptable if it passes "Resistor test"
7 |0 a6 W+ V7 a· Group of resistors must either pass "Resistor test" or pass subclauses
1 H& |# |& Q: D6 a4 ?2.10.3 and 2.10.4 (distances) with each resistor short-circuited in turn' Z2 X i/ ^: V# _5 {0 D$ k2 ?
"Resistor test":- y% q6 J. l% D7 \0 t) m2 r
Damp heat test of IEC 60068-2-78 plus impulse test and resistance
& s. c2 w( g6 W5 u2 \8 @% |measurement.. \8 U! w* J4 H [: P
1.5.7.3# O" V7 e; ^! G/ m& `
Modified 2
9 U7 p0 r9 K& g }% B9 BSame as 1.5.7.2 above but with different impulse generator for circuits with! h+ x9 e& y. s( M. q
coaxial cable connection.
" g8 z$ M; ?9 M( r- n8 Z1.5.9 Requirements for varistors (VDR) specified.
. h/ C! R5 ?9 b5 H2 B1.5.9.1 Secondary circuit surge suppressors: any suitable component allowed
O* b" l$ t& F% X! X: O* \) T$ NPrimary circuit surge suppressors: only VDR allowed.
; f* n3 x. H8 s, R1.5.9.2 An interrupting means must be provided for protection of the VDR in series.6 h$ {9 `2 r2 Z
1.5.9.3 It is allowed to bridge functional insulation by VDR, no additional
# N$ [/ A0 ?' R2 t; ~8 P* ?, Krequirements. v1 P' ^/ o. x v. U9 X
1.5.9.4 It is allowed to bridge basic insulation by VDR with additional requirements:2 R% }0 q7 R/ k C% y9 e$ t7 ^
· one side of the VDR must be earthed( O: `5 r9 e* X5 u" k
· only possible for pluggable equipment type B or permanently, v8 i* v0 l$ k
connected equipment or equipment with permanently connected
; X3 G0 X9 x2 H7 G4 w) D! oearthing conductor1 e7 i- H2 G$ ~% z; C; E3 y
· more restrictions for countries FI, NO, SE
. o3 f7 P5 _" ^/ n" ?1.5.9.5
+ n" t! C; d& O1 u) e$ KNew 26 W7 g; A' O* ~# I* v; x
It is not allowed to bridge supplementary/double/reinforced insulation by
% X4 v+ M X9 Y$ M7 ZVDR.5 J! w9 V p! T$ z* U3 a% c. F
1.6.1 Modified 0 "Note" for Australian national difference was deleted.
' G& k9 P- B% d0 v1.7.1 Clarified 0 Clarification for the use of the Class II symbol.
! Y5 s9 p" a/ e% d5 J1.7.2 Modified 0 Re-arranging of content of subclauses 1.7.2, 1.7.10 and 1.7.16. |
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