DSH 439 Connectors and Openings

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广东安规检测
有限公司提供：

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

DSH 439

Connectors and Openings : j/ a- C  ~$ [

2.1.1.1

60950(ed.2);am1-am4 & 60950(ed.3)

. e& a$ O2 |( d6 ?5 N2 k- f9 {Standard:
IEC 950 (1991) 2nd ed.,
Amdts.1(1992), 2(1993),
3(1995), 4(1996);
IEC 60950, 3rd edition (1999)
: Y* T* h& V* h& h8 g" w# ?, }( o* W% oSub clause:
4 f! Z- D. B  K( v# D9 I( v2.1.1.1
Sheet No.
439
Subject:
; b7 f( x& e3 C7 W5 JConnectors and Openings
, e& {+ p; Y( iKey words:
' t) Q7 U$ a7 {* O6 d2 dContact with hazardous
; V5 N# T2 }4 M* O" ?) M$ Mvoltages, test finger
Decision taken at the
39th meeting 2002
Question:
Is it the intent of the fourth dash of Clause 2.1.1.1 which reads “-functional or basic insulation of
parts or wiring at hazardous voltages” to include a 2 mm air gap of clearance from the tip of the test
finger since that dash says “basic insulation” and 2mm or clearance is basic insulation? A
subassembly of IT equipment (e.g., uninterruptible power supply) has modular power supplies that
& b$ D# A* n* m; S( a2 iare located in operator accessible compartments and are removable by the user. If the power
# L$ Q9 ~$ H+ K  t2 [# psupply is removed, the supply connector becomes exposed within the compartment. It is not
1 s/ o* w/ ~. R8 m, l3 k+ \permitted to make a contact with a hazardous voltage not exceeding 1000 volts a.c. or 1500 volts
" }' [8 K. h% M6 b2 D# ]d.c. Is this requirement sufficient or is there a need for an additional gap between the part at
4 q) F3 C4 L9 fhazardous voltage and the tip of the test finger figure 19 of IEC 950 (figure 2A in IEC 60950)?
3 M) l2 @/ I* _+ P' Y0 o3 ODecision:
% Z  b/ O/ y) Y! uContact is verified by means of a test finger, figure 19 of IEC 950 (figure 2A of IEC 60950), which
5 R. ?6 B. F9 j: fshall not contact parts described above when applied to openings in the enclosure (compartment)
; |4 d, o( @1 i! Y/ Zafter removal of parts that can be detached by an operator, including fuseholders, and with operator
: B. e/ f, Q" c. g1 L. |access doors and covers open. It is permitted to leave lamps in place for this test. Connectors that
can be separated by an operator, other than plugs and socket -outlets complying with 60083, IEC
; c5 C% r/ t" ]7 o) \) ~) x60309 and IEC 60320 shall also be tested during disconnection. Where contact is not permitted in
# {0 U, c% h* _9 }6 L+ }the above tests, there is no requirement for a minimum air gap between the tip of the test finger and
3 B3 z/ a0 s$ l! ~  A/ i0 z3 mthe part at a hazardous voltage not exceeding 1000 V a.c or 1500 V d.c.
$ q2 `2 A) o! p# K& u2 W
4 T) P, t# D: j2 @, R