DSH 155 Concrete Vibrators

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小型摆管淋雨试验机

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IEC61347/UL935镇流器热试验箱

灯具防风罩

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UL498插头插座量规

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家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

DSH 155

Concrete Vibrators " ~# u' h  P& i' Z

8.6 1 c6 w& A5 Q0 v5 c; V% I

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

' H) q7 P; C% K' e# hStandard:
IEC60745-1: 1st, 1982
9 @, n# j* m6 x" ~9 Q: V7 vIEC60745-2-12: 1st, 1982
- `8 ^* {# P/ ySub-clause: 8.6 Sheet n. 155
4 J& c5 Q3 f' a8 `. tPage 1(1)
/ V. U' v! g0 A" L, u. R6 oSubject: Concrete Vibrators Key words: Decision n. taken at 23rd
/ S4 \( O; E* Emeeting/1986
Question: The circuits supplying motors and other components inside parts which, in normal use, are
either immersed in the mixture to be vibrated or held in the hand or operated by hand, shall be
# U( I. y$ `3 V6 p( Z! Ladequately isolated from the supply mains.
Compliance is checked by inspection.
' u% Y# x! R5 y* wThis 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
, a" @2 m) a- W8 ydegree of isolation from the supply mains as a safety isolating transformer and having an rated
3 J* H- {) o$ t( H0 z  v; {output voltage not exceeding
3 M. y1 o# V8 p% T7 Y" I5 _115 V at frequencies not exceeding 60 Hz
250 V at frequencies exceeding 60 Hz.
0 }& X1 [7 ?+ z: w-.-.-.-.-.-.-.-.-
We would like to hear the opinion of the committee if a concrete vibrator class II, 250 V, 50
Hz without being supplied from an isolating transformer or motor-generator fulfills the
requirements stated in clause 8.6.
Decision: Mr. kraaij then introduces document IECEE/CTL (CH) 004/1986 concerning IEC Publication
745-1 and 745-2-12, Concrete vibrators. The Austrian document IECEE/CTL (A-EXP) 02/89 is
: v% V# _" X* w# a& }( btreated at the same time.
' k5 u9 K( ?* X# M( @  T6 a+ gAfter discussion the Committee expressed as its opinion that there are three possibilities for
& D8 t! E) ?* {. kthis type of equipment with regard to supply connection, namely:
1. safety isolating transformer
% V% ^& o  ^4 {9 E; D2. isolating transformer
$ H) f, r7 Q+ H' n3. motor generator