DSH 155 Concrete Vibrators

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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 0 U2 p. I$ C6 _2 f7 ] 4 S8 `0 I! z; v( f+ g0 M

Concrete Vibrators

8.6 + m* U8 `( }# _, n: q' q$ Q3 t0 ?

60745-1(ed.1) & 60745-2-12(ed.1);am1 6 k: J2 ]. U5 E/ _

Standard:
( L3 R4 F- x$ w! {. V4 EIEC60745-1: 1st, 1982
IEC60745-2-12: 1st, 1982
! @$ m  K9 r9 C& A$ r2 J3 vSub-clause: 8.6 Sheet n. 155
Page 1(1)
Subject: Concrete Vibrators Key words: Decision n. taken at 23rd
2 I3 c. o; A" t3 B# pmeeting/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
# [. S# @/ P: y5 r$ N8 i4 L% ~adequately isolated from the supply mains.
0 P7 w! m) m2 bCompliance 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
4 q7 `( @! m" M1 j8 Idegree of isolation from the supply mains as a safety isolating transformer and having an rated
output voltage not exceeding
115 V at frequencies not exceeding 60 Hz
250 V at frequencies exceeding 60 Hz.
-.-.-.-.-.-.-.-.-
7 s: G" g& o3 ]) s0 E. kWe 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
- F1 [: [: ?2 m3 g* Q( A; t' T4 ]* Trequirements 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
+ B3 h1 j, V5 n0 d# q3 C: jtreated at the same time.
After discussion the Committee expressed as its opinion that there are three possibilities for
; ]5 l" h8 J4 n+ J5 Athis type of equipment with regard to supply connection, namely:
7 q7 g! a1 M' t2 O" w1. safety isolating transformer
, i3 K: S/ t$ x8 S8 _! s; U; M" f1 ~8 i2. isolating transformer
/ h& A& y+ w: t+ I- t6 R3. motor generator
$ V# v3 ]  Y! _

: l- Z% q8 X& P5 w' T. `; i