DSH 155 Concrete Vibrators

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家电125mm试验指

E12灯头量规

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IEC60335试验指甲

DSH 155 : z; I) p3 B: L, r8 [8 P; D) u9 b 1 u0 C, ?! s9 F+ A! S% ~

Concrete Vibrators ! b2 i3 Q: p! I, Q' z! J

8.6

60745-1(ed.1) & 60745-2-12(ed.1);am1 - `. E) S6 W% |* F( Q! I9 Y  l

Standard:
; b$ I. N$ F) @; ~$ d! @* ]IEC60745-1: 1st, 1982
4 @. {5 W- l' B- E% J$ j3 A0 PIEC60745-2-12: 1st, 1982
' h& o' g0 Q! ^/ S1 DSub-clause: 8.6 Sheet n. 155
Page 1(1)
Subject: Concrete Vibrators Key words: Decision n. taken at 23rd
3 l. l  M$ g' u# R1 Imeeting/1986
" a6 k1 w; r$ b+ U/ D/ eQuestion: The circuits supplying motors and other components inside parts which, in normal use, are
1 I1 S5 I$ R% ceither immersed in the mixture to be vibrated or held in the hand or operated by hand, shall be
adequately isolated from the supply mains.
- p# d9 ~" j9 w* P; [5 N- T, {, dCompliance is checked by inspection.
This requirement may be met by supplying the relevant components either from a safety
isolating transformer or from an isolating transformer or motor-generator providing the same
4 B4 D/ q/ [4 `! R& ~+ ^" Sdegree of isolation from the supply mains as a safety isolating transformer and having an rated
output voltage not exceeding
6 B7 ~) J# `- _: x% @9 a115 V at frequencies not exceeding 60 Hz
250 V at frequencies exceeding 60 Hz.
6 X8 M) u+ E- l) I-.-.-.-.-.-.-.-.-
We would like to hear the opinion of the committee if a concrete vibrator class II, 250 V, 50
% X$ q+ s5 a) ZHz without being supplied from an isolating transformer or motor-generator fulfills the
0 {8 N" M2 |* M7 f% mrequirements stated in clause 8.6.
9 N$ V% |, c$ ~) T) `4 C3 |Decision: Mr. kraaij then introduces document IECEE/CTL (CH) 004/1986 concerning IEC Publication
9 S, n  W$ _9 ~+ U- X$ P745-1 and 745-2-12, Concrete vibrators. The Austrian document IECEE/CTL (A-EXP) 02/89 is
: X8 }6 ?( v( ~+ j! F( rtreated at the same time.
After discussion the Committee expressed as its opinion that there are three possibilities for
this type of equipment with regard to supply connection, namely:
1. safety isolating transformer
& d# q6 k; |* Q4 Y. w$ n: p2. isolating transformer
1 Q! g0 K; `' R3 ^3. motor generator

2 n! Q2 `! ?$ g  S1 g4 [