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0 G5 n' R0 y+ h
2 A- N; [$ J8 O) Y$ z7 D9 B |  DSH 3062 | p! l+ X( q* }- i5 a
| Protection against Mechanical Hazards* v+ s* d3 t0 M6 F% h3 O
| 7.12 [ w( w2 i$ `$ w! V) a
| 61010-1(ed.1);am1;am2$ B- j6 x# A. C) b' z
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5 y, U, M1 \ Z9 A7 e0 m
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Standard:
* f! s( L: g4 T" |: @1 p+ A1 FIEC 61010-
" {% D8 F. _6 L0 t- t1 k, `1:1990+A1:1992+A2:1995
9 ]# O! ^0 Z* A3 d, l$ H GSub clause:
3 ?: J) w, o$ S$ N! W7.18 C, C8 A2 } _. d6 @$ F; A
Sheet n. 306' W8 I/ ^' I4 A9 V$ x6 m% h
Page 1(1)
. W2 z: D1 | ~/ _) Z. \Subject:2 u( l% ~1 W% c+ _6 T1 M
Protection against mechanical
2 s. J$ h: E9 m y5 N r, \hazards
; C7 v1 ~4 m9 W) KKey words:
0 {5 G% d: Y! l( [ B8 g# M$ ^ w- Guards
" x# `, q( ^1 p3 ?8 I# c- Access
; }% ]3 F9 u2 r: V3 Z) wDecision taken by8 l: x( r2 G- u2 X3 T
ETF3 and confirmed
8 v0 s7 \8 k) Z1 @. fby CTL at its 38th
: F) F0 F6 s" N" D5 _5 F7 Nmeeting, in Toronto
( T$ n3 N: p; ~) s1 C( i% E0 cQuestion:; }0 O, O0 W8 [% \1 A/ a
The requirement states that there must be no access to hazardous moving parts in Normal
3 R8 r4 ]+ r+ |5 ~ }- t( hCondition and no parts must be expelled in Single Fault Condition. Does this mean it is
0 Y' G- _8 W; z# Tacceptable to have access to hazardous parts in Single Fault Condition?1 l" ~8 j6 X/ }/ q1 E5 m
Decision:
8 T$ o& E3 N9 ] N) }8 a, AMechanical parts are not subject to Single Fault Condition examination.8 ]# l) o7 ^) w) @7 T- U# R6 h
Explanation:) A) c+ E5 A' S' o7 e7 n# b7 Q z
Specific tests are included in the standard for strength, e.g. impact hammer test, which" h: L: b0 j) L$ N" A% ~& E
determine the acceptable strength of parts. It is not permissible to remove or presume
# V% x( l. e9 adestruction of mechanical components in simulated Single Fault Conditions in addition to$ m% g1 N+ t2 F3 c
these pre-determined requirements.2 ^: F5 ]: G3 n# S7 c0 j
Where safety of a moving part is determined by an electronic control, for example a speed
6 f; f& C9 r* W% ~; \- vcontrol circuit, then single fault analysis of this circuit must be performed if a hazard could) j- }# Z/ x- j! V
arise., Z+ i7 Y: p6 o0 @" W
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7 m, o* [, X, v* m, U$ [
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