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

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灯具防风罩

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家电温升测试角

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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 3 ^: q8 N! P) ^7 S8 Q

Protection against Mechanical Hazards

7.1 " H' T$ ?2 p) y& c

61010-1(ed.1);am1;am2 8 b! J6 U8 j2 S- T# f+ v

4 s. n; {: ^2 R5 |3 F- e' y1 `
Standard:
IEC 61010-
2 D: H( K0 ]  _1 r0 U* B4 Y) L' ~- F1:1990+A1:1992+A2:1995
Sub clause:
7.1
4 I+ m' m, Q* ?Sheet n. 306
Page 1(1)
Subject:
: [% [6 r2 y3 M. D3 i& {! k# @' o5 TProtection against mechanical
hazards
Key words:
- Guards
- Access
Decision taken by
7 c* }+ l/ c5 _* \2 c% sETF3 and confirmed
by CTL at its 38th
- @- a  f5 j8 N- ]5 ^meeting, in Toronto
Question:
, g0 C& [: t8 l& ?6 A5 gThe 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?
Decision:
4 [6 w1 Y; {% BMechanical parts are not subject to Single Fault Condition examination.
$ Y( J1 |6 b/ p' C$ W6 A5 sExplanation:
9 F5 K. }1 \9 X, vSpecific tests are included in the standard for strength, e.g. impact hammer test, which
3 a& P! {! y* {* Q5 x* P8 Z- E" }determine the acceptable strength of parts. It is not permissible to remove or presume
$ h) C4 m, @7 a  b2 Q: C+ cdestruction of mechanical components in simulated Single Fault Conditions in addition to
3 y* |/ ]* [6 S# }3 H# Bthese pre-determined requirements.
% u' ^; N5 G' WWhere safety of a moving part is determined by an electronic control, for example a speed
control circuit, then single fault analysis of this circuit must be performed if a hazard could
' D9 H6 x- }5 X* x- s5 M8 Zarise.