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|  DSH 2628 S0 f9 _4 V! V5 F+ `' N
( B$ ^ A2 z0 k$ u. L! D- o | Application of the tests depending on the insulation class, measurement of temperature on motor wind ...; d9 t. m% Y* Q; t1 H7 N5 U8 `4 Q
| 11.5, 11.62 i" j( B& ^/ s( G3 b
| 60745-1(ed.2)" p: z7 T/ \6 J; C# F+ y7 i
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( H5 k0 q; u/ q" a% f
Standard: IEC60745-1, Ed.2 Sub clause: 11.5, 11.6 Sheet n. 262
7 _5 `$ F, {7 F" t; h& kPage 1(1)/ @* M6 C- L$ x/ d. S
Subject: Application of the tests& {5 Q. b2 y. ?/ ^
depending of the insulation% y# m2 c T: W9 _; N: y9 w
class, measurements of7 h) Y7 L' `4 }- u# F- _
temperature on motor
* o$ i( T/ t4 k `windings
6 q- x- B! m1 u# j7 T! cKey words:
) U4 f) Z A0 v/ Q# n4 n- insulation class,
7 I) n" U4 [/ ` r& s& w( D# h n- resistance variation,7 N# m/ Q7 D+ U
- infrared,2 q) V# F7 B* W/ J7 Z7 j
- windings9 e) h/ B3 X5 x* @
Decision n. 18 taken( e) ]: `: s8 `- N6 a8 l
at 35th meeting/1998
\; W/ ?/ e% K5 K( V; AQuestions:
* W/ l, h* w9 D1 - During the heating test the temperature of a known insulation class system exceeds the o' m$ A* K" a- q
temperature limits specified in sub-clause 11.5. In this case, is it possible to jump multiple% O: K' u% |! ]* ] }) F
insulation classes when using 11.6. (This would mean that the test of clause 11.6 is R# G7 W( h" h" S; g8 ]8 Q/ i
applicable whatever the value of exceeding temperature rise) ?
% b4 E, _! w f2 Z5 D2 – How is the measurement of temperatures on armatures windings performed, specially& |; X" F: a V0 o: T1 C
when the windings of the rotor are not easily accessible? Is it possible to use infrared guns?$ z( T% p: ]& j( l8 @9 g% |+ X8 u- \" m
Decisions:- u$ }+ J" }# @* R" v/ F1 `$ C" O
1- The clause 11.6 is applicable for any temperature rise value independently of the5 l) a% U1 e2 Y5 A% N1 j
insulation class% ^: x6 a4 d9 e) p z+ w2 y
2- Resistance variation method is generally used, dismantling the motor and extrapolating
/ K+ t% O5 I' l! A1 I, }with a resistance/time curve, if necessary.- H5 w/ t4 h! Z' R4 L; C+ p
Other methods (Infrared , thermocouples) are not widely used and need to be confirmed.
4 t4 {) D+ m8 X; S5 ^: P3 \6 t) l9 f; g3 X5 l. x) }
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