DSH 306 Protection against Mechanical Hazards

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IEC60335试验指甲

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DSH 306 * X7 O) d& s: c# ^, q# x

Protection against Mechanical Hazards

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61010-1(ed.1);am1;am2 . E$ U. t  ?) A: |# u

Standard:
IEC 61010-
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Sub clause:
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Sheet n. 306
Page 1(1)
Subject:
* ]% ?) a5 ~+ \; q( sProtection against mechanical
hazards
. ?0 \% V: L2 l7 n1 EKey words:
" V* x) B  n0 x- ]0 _% P: q- Guards
- Access
Decision taken by
ETF3 and confirmed
by CTL at its 38th
meeting, in Toronto
& H, w0 H( P  E" {Question:
The 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
" O  }; X; u% C& q; `% g" Iacceptable to have access to hazardous parts in Single Fault Condition?
Decision:
Mechanical parts are not subject to Single Fault Condition examination.
Explanation:
$ P* m2 J9 y8 ?% Q$ u' dSpecific tests are included in the standard for strength, e.g. impact hammer test, which
determine the acceptable strength of parts. It is not permissible to remove or presume
% L# w+ Y& h+ @0 x/ A# z3 s; |; |destruction of mechanical components in simulated Single Fault Conditions in addition to
these pre-determined requirements.
. h9 l' F1 C; A; g: oWhere 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
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