|
本帖最后由 jjlamshushushu 于 2014-1-6 11:57 编辑
' A3 l% b6 c, d. Thead0819 发表于 2014-1-6 11:03
; o2 B, }% J. N9 B# C28章节短路一分钟记下的是最大输出电流,33章节是变压器过载的测试。 过载测试先从condition A开始, condi ... ; f! K2 n5 G) x( R! D. b
4 Q1 a; K2 j3 [& t( a( H
table 9 里的 condition B--Rectifier to cause half wave rectified short circuit 如何操作?
! X5 D; U; o) b" D7 C对表9中这段话如何理解?--- If the maximum available secondary winding current of 6 V3 H* @; \9 s" a. U2 o
a transformer is considered to comply with the maximum allowable9 P0 _9 b* v% O+ Y0 E
current limitation and it is impractical to obtain the one minute current value for this test, 4 a* b: ~4 w. m1 B3 \# V
the maximum measured secondarycurrent value at the time of coil burnout, or 8 A, 0 c" j. y# R9 S
may be used to determine the overload test conditions.$ Z4 Y; p) v: Q" a7 D
也就是说按照条件A--I,每个条件阶段持续7小时,其实条件A的过载电流=I +(I max-I) X100%=I max
9 U1 H; ~5 V: @! z1 U* {1 t即:只考量I max 不大于限值8A就可以替代其他过载测试条件了。是这样理解吗?
, B% t' g8 p9 x3 v( l |
|