DSH 155 Concrete Vibrators

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广东安规检测
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小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

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GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

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 " t% ~9 o" z( ^) x( M " f. E9 T; [. N, N, v; ]. ~; l

Concrete Vibrators + ~% z0 h7 p2 U- [; B/ C

8.6 1 i4 m: G0 T- E* A4 p7 q

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

4 ~9 N6 I7 M& B' }8 J$ j' DStandard:
9 B  t0 r; O  n, p7 eIEC60745-1: 1st, 1982
! r4 J" ]+ e! V% `2 i+ f. K  pIEC60745-2-12: 1st, 1982
$ Y9 h6 l" g: F; a! ISub-clause: 8.6 Sheet n. 155
Page 1(1)
% c5 j% A0 z& cSubject: Concrete Vibrators Key words: Decision n. taken at 23rd
; p, W; H4 |4 V4 V( C5 t. |1 [meeting/1986
Question: The circuits supplying motors and other components inside parts which, in normal use, are
+ [) |7 p8 S+ v0 Qeither immersed in the mixture to be vibrated or held in the hand or operated by hand, shall be
6 V, {9 ]+ f$ M2 n+ t' radequately isolated from the supply mains.
Compliance 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
1 e5 v- T0 f, o. [4 A% ]" F% hdegree of isolation from the supply mains as a safety isolating transformer and having an rated
# I4 C3 G* J) W1 D# Zoutput voltage not exceeding
4 U6 J5 t* @( k. {115 V at frequencies not exceeding 60 Hz
250 V at frequencies exceeding 60 Hz.
-.-.-.-.-.-.-.-.-
We would like to hear the opinion of the committee if a concrete vibrator class II, 250 V, 50
% S2 L4 x' D, O- [9 k+ }% {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
* o1 ]6 r$ o( {( q! Z6 z2 e745-1 and 745-2-12, Concrete vibrators. The Austrian document IECEE/CTL (A-EXP) 02/89 is
6 @- o, P9 B6 |9 o' Htreated 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:
; i! V9 t& e- @- D2 m' t1. safety isolating transformer
2. isolating transformer
+ M( A  l$ }6 @8 a% q' t3. motor generator
; l! X2 P1 j6 P