DSH 155 Concrete Vibrators

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家电温升测试角

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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 8 }% _4 G3 t: U' M3 C , J) @% j5 u- ^7 a

Concrete Vibrators 6 r; V2 y3 F3 X8 h  A1 D. M0 }: k

8.6 / O7 i% c2 {' h8 Q/ t9 M$ K# f

60745-1(ed.1) & 60745-2-12(ed.1);am1

Standard:
6 }) D3 Q* _) K1 y" ?IEC60745-1: 1st, 1982
IEC60745-2-12: 1st, 1982
Sub-clause: 8.6 Sheet n. 155
  v+ V, K& W* k/ Q( D% CPage 1(1)
Subject: Concrete Vibrators Key words: Decision n. taken at 23rd
' Y5 p7 t1 |5 i4 U4 ~meeting/1986
Question: The circuits supplying motors and other components inside parts which, in normal use, are
% V2 t* Y, s9 d/ G/ h4 Xeither immersed in the mixture to be vibrated or held in the hand or operated by hand, shall be
adequately isolated from the supply mains.
* I1 S' {0 i" b- E; o  j9 y- F1 i, L; aCompliance is checked by inspection.
! U3 @( z1 ?) C1 yThis requirement may be met by supplying the relevant components either from a safety
5 c8 f, h% q8 k9 h- ]0 _isolating transformer or from an isolating transformer or motor-generator providing the same
degree of isolation from the supply mains as a safety isolating transformer and having an rated
output voltage not exceeding
/ d% r! H7 g. |! z115 V at frequencies not exceeding 60 Hz
( a; e2 x* {! {7 F6 }  B2 [" t250 V at frequencies exceeding 60 Hz.
-.-.-.-.-.-.-.-.-
" x. o' ]- S: l6 m& B* rWe would like to hear the opinion of the committee if a concrete vibrator class II, 250 V, 50
$ I5 q: T+ T- I% r* n6 ?8 THz without being supplied from an isolating transformer or motor-generator fulfills the
' K7 X7 C8 @4 j+ J3 p$ S' @# c8 `requirements stated in clause 8.6.
, }  c4 m1 o8 v% I, D& qDecision: Mr. kraaij then introduces document IECEE/CTL (CH) 004/1986 concerning IEC Publication
9 S0 ~, G/ m) [745-1 and 745-2-12, Concrete vibrators. The Austrian document IECEE/CTL (A-EXP) 02/89 is
treated at the same time.
" i6 f) B; x4 EAfter discussion the Committee expressed as its opinion that there are three possibilities for
this type of equipment with regard to supply connection, namely:
( W: |4 N# W+ Q' e1. safety isolating transformer
; \' q) j1 n7 ~% w2. isolating transformer
& z! Y4 L9 O9 q3. motor generator


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