|
|
head0819 发表于 2016-11-16 11:43 
0 x! {) h+ k4 @9 S' { p' T你把标准截图上来啊！
0 `$ [+ V) R" K% |# \; ~41 Test for Limited-Voltage/Current Circuit Transformers; e# |1 q f" {9 R2 I: |; ^
41.1 A transformer intended to power a limited-voltage/current circuit shall be tested as described in 41.2.& @7 A3 M7 Q5 g* d
41.2 The maximum volt-ampere output capacity of the secondary winding is to be determined as follows:: i6 b8 v0 ~3 W! Y
At room temperature, the primary winding of the transformer is to be connected as intended in the
! C. B* p2 n+ a. T. Sequipment and the secondary winding in question is to be connected to a variable resistance load. When
; c+ O/ Z" ?! a) Ta fixed-series impedance or regulator circuit is relied upon to limit the output, that impedance or regulator' D8 S# n. p/ q3 ?# E) R
circuit is to be included in the circuit during the test. A multiple-winding transformer is to have one
( s! u7 C) W t. ]secondary winding tested with all other secondary windings open-circuited, and is to be allowed to cool to6 q1 b0 d2 `1 M( S; G" B
room temperature again before another winding is tested. A primary winding is to be connected to a
9 ~9 k9 q2 i% w2 e2 Q7 ^4 Asource of rated voltage. The load on the secondary is to be varied in 10 increments from open-circuit to
4 x% @, a: q4 Q. ^8 a4 u, zshort-circuit condition in 2-1/2 minutes. For each step or increment in the resistance, the product of the
& }. _! Q3 C" F2 {" woutput voltage and current is to be recorded, plotted, and run as a smooth curve. The peak value obtained7 ^* q% M- C0 p; v: H; T, I% m2 N% M
from the curve shall not exceed the volt-ampere value specified in Table 27.1. When two or more
4 L* n7 Q/ A. R: ]secondary windings supply interconnected circuits, the sum of the outputs of the windings in question shall
7 b8 o8 ~; D! y f3 onot exceed the values specified in Table 27.1.
' y# A' |5 \1 ?% K/ g0 x: r
- y: `) l/ g7 T! a6 L0 v做舞台灯的大部分都在广州及花都，2010-2012年间有多少家的舞台灯具被我拆的七零八落呢？ |
|
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2016-11-16 09:32
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡
发表于 2016-11-16 11:54
