DSH 631A Testing of abnormal conditions of dc motors in secondary circuits

小米

广东安规检测
有限公司提供：

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

DSH 631A ; h5 B$ t! C7 q% Q" M  r

Testing of abnormal conditions of dc motors in secondary circuits / z2 k" P! u4 G3 G4 H1 e# P

5.3.2, Annex B " f+ z) I6 j5 G  g9 X4 J

60950-1(ed.1) & 60950-1(ed.2)

Standard(s):
IEC 60950-1:2001 IEC 60950-1:2005
, B/ ?* R7 }* a- l6 RSub clause(s):
5.3.2, Annex B
DSH
$ N2 y8 B9 ]% g  Y8 I" h; B+ h631A
Subject:
Testing of abnormal conditions of dc motors in secondary circuits.
/ I# g! p( S3 L3 cKey words:
; S# B4 S* C1 }& o; jDC fan, overload, Annex B
) T6 S  b( G0 W4 OApproved by the 45th CTL Plenary Meeting 2008
Question:
3 D0 H0 @+ U; y( ]- h1. Is the test as described in Annex B.6 required for small dc motors (e.g. fans used in notebooks or power supplies)?
2. Is it permitted to skip the limit temperatures of Tables B.1 and B.2 for dc motors in SELV circuits (following the second dashed paragraph of NOTE to subclause 5.3.2)?
Decision:
9 J/ ]$ L4 u  F. `) _1 o8 P, _$ p3 A1. Yes, the test is required, except for motors associated with air handling (fans). Note -This is in line with the proposed modification of B.1 for Amd.1 to IEC 60950-1.
2. Yes, it is permitted for such dc motors to exceed the limit temperatures of Tables B.1 and B.2 during tests of subclauses B.6 and B.7.


1 h; l: J" |0 T/ D