DSH 155 Concrete Vibrators

小米

广东安规检测
有限公司提供：

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

灼热丝试验机现货

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 * v# N1 C$ F# ]3 }1 i

Concrete Vibrators % T0 L+ o: `- S/ L6 _: q) K

8.6 4 F3 a6 s7 E5 T# J& I

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

7 c  Q6 c0 m+ V  l: P$ LStandard:
3 h3 j  }0 y7 F/ ^* d! P) lIEC60745-1: 1st, 1982
IEC60745-2-12: 1st, 1982
# N: [! S) k6 ^+ [7 s4 u7 C. s# XSub-clause: 8.6 Sheet n. 155
Page 1(1)
$ o0 Z$ f; i1 K6 u3 M! }" i5 c2 SSubject: Concrete Vibrators Key words: Decision n. taken at 23rd
+ K* s/ N7 W2 P8 X, r4 Z& |$ L! rmeeting/1986
Question: The circuits supplying motors and other components inside parts which, in normal use, are
. C1 W$ s% Y5 j" U2 a5 `either immersed in the mixture to be vibrated or held in the hand or operated by hand, shall be
# n/ U7 T, z2 X7 D! z/ @2 Y  O, iadequately isolated from the supply mains.
/ E9 c4 x7 F" ?% t, Y# s* aCompliance is checked by inspection.
9 z. F: w  d3 c9 p7 I& @9 v9 G' iThis 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
degree of isolation from the supply mains as a safety isolating transformer and having an rated
output voltage not exceeding
$ z' V/ N- `$ ~' A, y115 V at frequencies not exceeding 60 Hz
7 e/ s4 Z  F) q7 G250 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
# x  s  ~5 y7 k8 nHz without being supplied from an isolating transformer or motor-generator fulfills the
% t+ [4 y( p# zrequirements stated in clause 8.6.
3 B1 k* }  d2 A7 H& T& \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
treated at the same time.
After discussion the Committee expressed as its opinion that there are three possibilities for
+ }# ^1 \0 H' k" i4 a% Wthis type of equipment with regard to supply connection, namely:
1. safety isolating transformer
2. isolating transformer
0 D# t; V, _, B/ m* m: L3 ~& z3. motor generator
( j9 K( p% n1 P  C) ]2 _* w, _1 m