60745-1(ed.1) & 60745-2-12(ed.1);am1 8 r, s5 K' \9 a5 w; o, [, }6 R
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Standard: / N {# `7 j* m4 oIEC60745-1: 1st, 1982, a) G3 F2 @2 c- s+ n8 o
IEC60745-2-12: 1st, 1982; w- U5 V4 M" D" _" X% k
Sub-clause: 8.6 Sheet n. 155 3 ~( L) x$ ? u- wPage 1(1) / w9 Z- t+ K7 Y- W! }! rSubject: Concrete Vibrators Key words: Decision n. taken at 23rd 7 w/ B+ x2 d) Z, a2 I) `( omeeting/1986 , Z9 k: p# t8 f# O- ^Question: The circuits supplying motors and other components inside parts which, in normal use, are; D8 z) s1 D9 d8 Q$ o' \
either immersed in the mixture to be vibrated or held in the hand or operated by hand, shall be9 X. ^0 ^, n8 W+ z1 N- A2 {
adequately isolated from the supply mains. $ Z; T! C+ C( y9 `; Q' S7 [! O8 mCompliance is checked by inspection.; G1 K: e( l/ s8 ^$ d B" c% F* W* \
This requirement may be met by supplying the relevant components either from a safety6 \ L6 z2 k, v: G0 k6 p
isolating transformer or from an isolating transformer or motor-generator providing the same+ x \3 U$ R, u; X. {1 |
degree of isolation from the supply mains as a safety isolating transformer and having an rated9 m' [, R( I, o8 O& m) g
output voltage not exceeding , F: r7 `1 s% h9 V115 V at frequencies not exceeding 60 Hz 1 x8 i& u. y4 H) C250 V at frequencies exceeding 60 Hz., U- l% ]- G' l! \+ M
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We would like to hear the opinion of the committee if a concrete vibrator class II, 250 V, 50" v7 R) W D1 z. @
Hz without being supplied from an isolating transformer or motor-generator fulfills the U+ ]/ v5 a, w9 Prequirements stated in clause 8.6.8 U+ ~& @0 y$ M8 ]
Decision: Mr. kraaij then introduces document IECEE/CTL (CH) 004/1986 concerning IEC Publication 9 o" [/ y, X6 N& ~% D% h745-1 and 745-2-12, Concrete vibrators. The Austrian document IECEE/CTL (A-EXP) 02/89 is/ }8 ~) m% \; V: k3 Y
treated at the same time.; Y. G' y5 W. }5 B- A5 _
After discussion the Committee expressed as its opinion that there are three possibilities for9 A1 d# w. c: J* V, C9 X
this type of equipment with regard to supply connection, namely:4 P, Z# @% ~. @- ^4 X b- t. I
1. safety isolating transformer) S. u8 ^& h( J# |. z9 S, W) R
2. isolating transformer* A2 [/ c3 t4 g% L6 d- {
3. motor generator o- K6 ^7 R" v, B/ [/ q% @) z+ P7 P0 X" d6 D( ?0 D1 [
[attach]77274[/attach]- }2 S# W+ |( s. g! _: F
DSH 155