DSH 306 Protection against Mechanical Hazards

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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

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水平垂直燃烧机

自动卷线器试验机

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灯具防风罩

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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

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DSH 306

Protection against Mechanical Hazards

7.1 6 v0 {2 F2 v. B8 e' D3 `

61010-1(ed.1);am1;am2

) y. P. ]& P% R$ H8 t+ j! G) NStandard:
IEC 61010-
1:1990+A1:1992+A2:1995
# _$ l1 {* l* K% U* A4 NSub clause:
7.1
$ j. [" T$ x8 Q. A- Q- aSheet n. 306
7 ?5 ~/ m1 [# I. c( w. F, \$ LPage 1(1)
6 O; z: Q* l: L2 S' a/ A& jSubject:
Protection against mechanical
hazards
Key words:
- Guards
" z/ q. T0 X) p- Access
; r% ]2 D+ L! a# uDecision taken by
; b5 s8 x0 }. B2 S+ b2 D2 pETF3 and confirmed
by CTL at its 38th
meeting, in Toronto
* t+ n, t% b8 q% g" c4 |Question:
/ X! ^- E1 L3 [$ W( ^  JThe requirement states that there must be no access to hazardous moving parts in Normal
Condition and no parts must be expelled in Single Fault Condition. Does this mean it is
acceptable to have access to hazardous parts in Single Fault Condition?
& C. x5 _# ~; V# q. W  w4 y, M, a7 g/ qDecision:
# a, P/ e. [9 L) p8 RMechanical parts are not subject to Single Fault Condition examination.
9 }2 t! [6 H9 J$ c9 PExplanation:
! k) G9 N/ d& e$ C# ~Specific tests are included in the standard for strength, e.g. impact hammer test, which
* a- ]5 P' u6 _7 {determine the acceptable strength of parts. It is not permissible to remove or presume
) Y" Y6 [: ?( r4 x% q" n0 _/ b1 C6 ]destruction of mechanical components in simulated Single Fault Conditions in addition to
2 v: n0 j7 u7 E( ]these pre-determined requirements.
Where safety of a moving part is determined by an electronic control, for example a speed
% d5 v9 u6 ^6 }4 ]control circuit, then single fault analysis of this circuit must be performed if a hazard could
: G. _/ C7 u0 P. |, D) w: Warise.



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