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|  DSH 592/06
2 u" Z$ A: A9 {; q0 _5 U5 L! K5 H3 N. U. y. M8 |8 R% x" o
| Dust test for IP 5X and 6X as described in the transformer standard
' H* p/ p! P) ? | 17.1.1C, 13.4
7 P8 I( N! ~& w5 { | 61558-1(ed.1);am1 & 60529(ed.2);am1, ?- Y% i. o" v% z
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+ u9 z. G2 X3 q* ?2 c. z7 `
Standard: IEC 61558-1/19977 h- W* f7 J$ l8 L* ~) Q. z
A1/1998
. U! \3 C# _- b) n3 I, LIEC 60529/1989
/ X6 k. G' f" S4 D" LA1/1999
O3 y0 l- e' \" i0 }Sub clause: 17.1.1C) @' J" y, @3 D( Z- ~
13.4; j& Z& K* o* o
Sheet N°: 592/06
3 s/ s$ |/ Q$ N, z) Y7 x4 KPage: 1(1)3 _2 `3 ~/ L0 n5 C& @
Subject: Dust test for IP 5X and9 H/ k; O) U) t& p1 D
6X as described in the G6 [0 l @' N5 ?( T3 C
transformer standard% i' ^* k B. ^. c. {" [ J( G
Key words:
2 k: ^$ j1 C3 B+ O4 L- Transformers
7 c) d* F4 S- M" D- Dust test
2 r; w p, K6 l! `4 c: m- IEC 605290 Z6 q1 W6 ^+ x' x, y
Meeting:, i) \6 D7 G3 ^! h3 R
Decision confirmed
' Y( r0 B0 B* G6 Eat CTL 42nd meeting
9 h X- S1 K1 S1 ?0 B/ ]$ OQuestion: In the horizontal safety function standard for degree of protection provided by
! q6 c9 o7 e) }% d! z: s- penclosures (IP code), IEC 60529, a description of the dust is given in subclause
( p e+ L( `3 y6 x" o/ I3 `: K# Q13.4. However, in the transformer standard the description of the dust divagate a
9 o& l; G% R) J, t/ {& _bit as the following wording is added: “and shall have a range of particle size( ?9 d2 i+ Z% F0 @3 ^# H
down to and including 1 +m with at least 50% by weight less than 5 +m”. This* b7 K/ Q1 A6 s4 s8 ~; Q/ K
more precise description imply that dust in the dust chamber must be changed
% k3 f' ]4 u1 U8 Q; xwhen a transformer is tested, this without any technical reasons. For the future,
x( h, @8 c6 C: Z( ~& b) `can we use the dust specified in IEC 60529 also for transformers?3 h- J: A5 o( j Y+ v6 q! u& F1 a
Decision: The horizontal safety function standard IEC 60529 shall be followed, i.e. the dust
9 W1 z& _+ M; H; Z$ yspecified in subclause 13.4 can be used.9 n, g) a. ]% ]4 B+ k
4 k$ c8 @* w5 b5 Q- m' R2 e6 Z: b& r4 T" X4 W/ v* F
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