安规网

标题: DSH 262 Application of the tests depending on the insulation class, measurement [打印本页]
作者: 小米    时间: 2012-11-8 15:32
标题: DSH 262 Application of the tests depending on the insulation class, measurement
DSH 262' S) j( _: k) a7 \0 Q
! ~. }5 N' k4 ]3 ^5 Q
Application of the tests depending on the insulation class, measurement of temperature on motor wind ...# T4 i) ]8 ?% _% R; d
11.5, 11.6
8 G5 |4 T' L. M		60745-1(ed.2), ], z, T  W* A' l. u
% [7 C5 b- @+ U. E( W
Standard: IEC60745-1, Ed.2 Sub clause: 11.5, 11.6 Sheet n. 262. `- ]# Z; n$ b2 \. B+ t
Page 1(1)  G0 D% f  ~- [5 w
Subject: Application of the tests
$ v# U& D/ g5 r( Zdepending of the insulation
3 S2 H* e/ [# E+ ?! T: K  Dclass, measurements of
; @- t4 f8 L3 Z- f1 k  C' ztemperature on motor4 o! e" w8 z" v
windings
" E0 C( k' n' s% ?7 H0 o7 p* |Key words:9 D7 J8 C; J$ j6 r( X( v2 g8 k# u
- insulation class,
& }. P+ H  f) i  `, Q- ?- resistance variation,
% }  Z; {* \: V7 i# }% M4 X; c- infrared,
# P+ y+ h- ?* n) Y7 g7 N- windings# a6 i) l) ^$ w* N. G# X$ T# q
Decision n. 18 taken
: p$ C. s7 _- S1 \) Q) W. E3 n! rat 35th meeting/1998& ^  }% g0 x) v% Z# E3 v* U2 I% ]2 I- j$ ]
Questions:! M# L4 _& k2 @8 G# E' a' j
1 - During the heating test the temperature of a known insulation class system exceeds the
0 U5 ^7 }& p; y, D1 g& }1 ctemperature limits specified in sub-clause 11.5. In this case, is it possible to jump multiple$ g' @7 u- W8 m% P% t" I* K: c
insulation classes when using 11.6. (This would mean that the test of clause 11.6 is- m; b; I8 C( z
applicable whatever the value of exceeding temperature rise) ?
$ ]; v. N3 Z4 j2 – How is the measurement of temperatures on armatures windings performed, specially* |6 S1 G+ C3 \, L+ b1 w; ]7 `- i( r
when the windings of the rotor are not easily accessible? Is it possible to use infrared guns?' t/ X( J+ y! _+ _$ u4 W4 Q! c/ X
Decisions:: v1 s9 U$ f6 ~. d" _  W' D
1- The clause 11.6 is applicable for any temperature rise value independently of the( D0 k& v" N- [' ^; o- D9 Q+ o
insulation class% Q& B! ?# C* N" E0 T8 I
2- Resistance variation method is generally used, dismantling the motor and extrapolating7 U2 R4 ~% Z/ i4 z
with a resistance/time curve, if necessary.
5 h0 i* j; X* L* JOther methods (Infrared , thermocouples) are not widely used and need to be confirmed.9 _( b9 W5 i7 H8 c! C
[attach]77273[/attach]
/ M" a6 C) i( T/ @



欢迎光临 安规网 (http://bbs1.angui.org/) Powered by Discuz! X3.2