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|  DSH 155
' l# e9 V* Y. y2 R, ]5 Q, o# o! k @9 ?# q! N; |
| Concrete Vibrators* W. v, X |! e, j
| 8.6
) f$ n' u4 d8 Q, s! G8 i! w1 X | 60745-1(ed.1) & 60745-2-12(ed.1);am1. }8 l8 X+ y" g" s/ Z: A
|
" w3 R# ^+ N q3 b# zStandard:
6 n- @% ?3 r; g: q9 {/ e6 e. u+ sIEC60745-1: 1st, 1982
$ ?$ w& ?, x. B1 o$ t' bIEC60745-2-12: 1st, 1982
; \ |% g+ k0 {4 Q/ OSub-clause: 8.6 Sheet n. 155
/ r; _9 k- F. b* Y0 D4 {5 f: pPage 1(1)
0 |1 o$ f7 W& V! K# }1 XSubject: Concrete Vibrators Key words: Decision n. taken at 23rd& i4 \& e; [2 V; c3 D# R( ]3 U( g; b
meeting/1986
8 ]; u/ ^( {- \- L1 _4 VQuestion: The circuits supplying motors and other components inside parts which, in normal use, are* w% p- ~1 J5 m; u" V l
either immersed in the mixture to be vibrated or held in the hand or operated by hand, shall be; O( f' y" ~2 k" z _1 A
adequately isolated from the supply mains.0 g3 p" B. T5 ]) Z: N+ A
Compliance is checked by inspection.
% z6 H0 L. s9 y/ TThis requirement may be met by supplying the relevant components either from a safety
: j6 u& r `1 [) F+ Aisolating transformer or from an isolating transformer or motor-generator providing the same
! `. H) Z, e& @. k+ s" _degree of isolation from the supply mains as a safety isolating transformer and having an rated' G( m4 z% O8 Q' a) D& q! _
output voltage not exceeding5 V6 l3 Y; d" k ?) C
115 V at frequencies not exceeding 60 Hz, o$ j+ z' K, R& H( g! [$ b
250 V at frequencies exceeding 60 Hz./ {! P* i4 `4 a9 e
-.-.-.-.-.-.-.-.-. `5 }! O/ u H. \! v5 D' K9 x! p
We would like to hear the opinion of the committee if a concrete vibrator class II, 250 V, 50
$ a7 _3 r: Z1 _7 h% [# OHz without being supplied from an isolating transformer or motor-generator fulfills the. @% u3 R6 {0 z* u
requirements stated in clause 8.6.
/ |* z( {: Z" }Decision: Mr. kraaij then introduces document IECEE/CTL (CH) 004/1986 concerning IEC Publication6 T; c# h A8 t* b6 k7 P3 D
745-1 and 745-2-12, Concrete vibrators. The Austrian document IECEE/CTL (A-EXP) 02/89 is: x5 K8 u4 R( l8 U; j4 ?. z) U
treated at the same time.
& S! F/ S$ b2 |9 s' I, q) ^After discussion the Committee expressed as its opinion that there are three possibilities for! J/ e7 B, P) f, d" t
this type of equipment with regard to supply connection, namely:
! r$ k( ^8 N) W+ [3 j# [1. safety isolating transformer' {% a4 t7 W9 P6 y
2. isolating transformer
4 H& o# q$ X( v- x( {; b- {3. motor generator: t7 R a0 ? O. d6 T
" U1 _; u% |& C, T$ {
4 L; R2 n R$ R; u3 \& \5 y |
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