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问题请教:
4 s a0 M, G: Y7 v7 U+ F1 v0 y如题目:3 P, _1 T' G c' q2 o1 \) X0 k
加拿大C22.2 no.77-95 Motors with Inherent Overheating Protection4 s2 l" N2 Z. I, g! ]/ g# f* Q o% c
如下测试要求
/ m0 b5 n- [* r; ?5.6.6 Motors with Thermal Cutoffs, ^; @% Y/ K% X! B$ D
Motors with thermal cutoffs shall be subjected to an endurance test of 18 d, with the winding7 x$ z Z1 r! Z
at the maximum temperature that the protector will allow (see Clause 5.4.1) plus the total+ S9 c; B3 A7 y# `$ [. W% o, ^
protector tolerance or, if the manufacturer requests, at a lower temperature, but in no case
: ]2 M* H; q7 I* I7 qless than 150°C if Class A or 175°C if Class B, F, or H insulation. The temperature shall be
# J7 l8 B7 g. g- W: yobtained under locked-rotor conditions by adjusting the applied voltage or the ambient
" p( D$ p5 B7 m; Y! ^9 ^: Stemperature. During this test, the protector shall be disconnected from the circuit.8 z( B6 ]$ E9 N
+ _! x4 Y( k9 M! Z s6 L目前电机上温度保护器动作温度为120度,电机绝缘等级为CLASS A X4 l# P7 a! M( @2 w4 }$ c
( X* M! F+ @" ?# c8 @
问题:那这个测试过程中,通过调电压的方式,
. E1 M2 o5 ^ ?( [使电机线圈的温度保持在120度还是150度???
$ ?6 P. w7 p) V/ c. I# U9 `8 t( R$ ]
7 u0 l/ q) }) L, [谢谢 |
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