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

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 * M& J& R0 l. J2 r# F

Concrete Vibrators

8.6

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

# ?8 y) P: {' s# b$ dStandard:
3 u& k+ U, |! s2 h$ ~, pIEC60745-1: 1st, 1982
2 j& m7 @. K" c% L3 r* |5 qIEC60745-2-12: 1st, 1982
7 G9 ~& s; t9 c6 uSub-clause: 8.6 Sheet n. 155
Page 1(1)
! Q0 g9 ?2 C2 W: T& rSubject: Concrete Vibrators Key words: Decision n. taken at 23rd
1 H) b* J  E5 emeeting/1986
Question: The circuits supplying motors and other components inside parts which, in normal use, are
: ~# p# ]  D1 h+ {9 P6 beither immersed in the mixture to be vibrated or held in the hand or operated by hand, shall be
adequately isolated from the supply mains.
6 V- o1 A8 t$ T4 m# x# a; P( wCompliance is checked by inspection.
This requirement may be met by supplying the relevant components either from a safety
+ n2 J+ K0 ?. p3 s, Nisolating transformer or from an isolating transformer or motor-generator providing the same
" h$ C5 y3 V  E. `/ M5 A: U% Ldegree of isolation from the supply mains as a safety isolating transformer and having an rated
9 A  M8 T, T  Y: E3 t$ routput voltage not exceeding
115 V at frequencies not exceeding 60 Hz
# Q0 Z! F' |/ B4 e7 t" w( C250 V at frequencies exceeding 60 Hz.
6 w2 i7 X7 e8 ?7 G-.-.-.-.-.-.-.-.-
/ l- `6 M, ?/ uWe would like to hear the opinion of the committee if a concrete vibrator class II, 250 V, 50
  j8 _. U& {6 [  a+ c* t) L% |Hz without being supplied from an isolating transformer or motor-generator fulfills the
$ |7 K7 L2 {! o* {4 Z5 drequirements 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
treated at the same time.
# U% Y3 ]9 F' ^0 P7 mAfter discussion the Committee expressed as its opinion that there are three possibilities for
this type of equipment with regard to supply connection, namely:
4 e) V3 W& h) K6 r- Z1. safety isolating transformer
2. isolating transformer
: _5 h3 U" `/ q. Y5 h3. motor generator
0 Y3 e4 ^. j- z  t- O
; Z- b$ L- i# L/ E4 o) _5 W$ _