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 ( X1 s% g  f! D! Y

2.1.1.1

60950(ed.2);am1-am4 & 60950(ed.3) % I7 o' a4 r! F, N7 ~( G* E

( S% A8 g9 O, CStandard:
IEC 950 (1991) 2nd ed.,
! w% G. m$ T3 b8 Q# OAmdts.1(1992), 2(1993),
7 m: ?; ]. ^& K6 `8 d3(1995), 4(1996);
, |4 x2 f; `8 v% LIEC 60950, 3rd edition (1999)
; R  |) r# D, p9 E2 USub clause:
. g6 [) j& U+ T2.1.1.1
- v% F$ o! T0 ^6 P7 T3 \+ DSheet No.
! X( e0 I% K% C8 a7 ~' i439
; \% [$ [2 n  F. D/ rSubject:
Connectors and Openings
, L  c. g6 g$ ]Key words:
Contact with hazardous
voltages, test finger
Decision taken at the
! o2 X( L& ^' s2 @( h5 P4 e39th 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
are located in operator accessible compartments and are removable by the user. If the power
5 w. _* G# p9 w6 k/ f# Zsupply is removed, the supply connector becomes exposed within the compartment. It is not
5 y, S! n! }$ A" K0 w" Kpermitted to make a contact with a hazardous voltage not exceeding 1000 volts a.c. or 1500 volts
( f* i. `) H4 M' B: Gd.c. Is this requirement sufficient or is there a need for an additional gap between the part at
: {3 ?1 W- |% Z3 Y* X' whazardous voltage and the tip of the test finger figure 19 of IEC 950 (figure 2A in IEC 60950)?
Decision:
Contact is verified by means of a test finger, figure 19 of IEC 950 (figure 2A of IEC 60950), which
shall not contact parts described above when applied to openings in the enclosure (compartment)
% j6 n" N, P; `2 ~after removal of parts that can be detached by an operator, including fuseholders, and with operator
5 _( ?3 X: y9 H, O4 \$ ~& _$ haccess 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
! L1 y9 o* f1 ]60309 and IEC 60320 shall also be tested during disconnection. Where contact is not permitted in
the above tests, there is no requirement for a minimum air gap between the tip of the test finger and
1 O+ J  N% o2 P, K8 B: {the part at a hazardous voltage not exceeding 1000 V a.c or 1500 V d.c.
; @& E4 \* M7 ^8 U9 A0 H
/ M# M* a- v! b  y