|
|
head0819 发表于 2016-11-16 11:43  2 }' Y5 A# b' T9 I; [: Y
你把标准截图上来啊！
41 Test for Limited-Voltage/Current Circuit Transformers1 {2 n$ P) |) H$ C4 n
41.1 A transformer intended to power a limited-voltage/current circuit shall be tested as described in 41.2.
# [: ]- ], j8 b41.2 The maximum volt-ampere output capacity of the secondary winding is to be determined as follows:7 j3 T: b4 t+ E# Z( Q
At room temperature, the primary winding of the transformer is to be connected as intended in the, j% z& R7 |* K9 j1 K
equipment and the secondary winding in question is to be connected to a variable resistance load. When) ^, q) Z3 X& |$ B! @) v, k
a fixed-series impedance or regulator circuit is relied upon to limit the output, that impedance or regulator
7 a2 @' u2 h+ S, [; Z; j9 q lcircuit is to be included in the circuit during the test. A multiple-winding transformer is to have one9 S& p1 e' g3 q
secondary winding tested with all other secondary windings open-circuited, and is to be allowed to cool to9 f5 G8 Q% l( o% v% k3 ^/ p% t: U
room temperature again before another winding is tested. A primary winding is to be connected to a
7 X3 N; X$ K* e: q! ~source of rated voltage. The load on the secondary is to be varied in 10 increments from open-circuit to
# ]" w" G; ~3 w7 _' S$ P4 R. Jshort-circuit condition in 2-1/2 minutes. For each step or increment in the resistance, the product of the
: }$ Q5 ]5 L2 r* _output voltage and current is to be recorded, plotted, and run as a smooth curve. The peak value obtained; m5 f" X. R* I. ~" y) `6 C: b
from the curve shall not exceed the volt-ampere value specified in Table 27.1. When two or more) z. ^, K: Q* U. {' A
secondary windings supply interconnected circuits, the sum of the outputs of the windings in question shall- z; e# Y* ^. r* b/ r
not exceed the values specified in Table 27.1.
9 ~0 I5 `8 [* J0 O6 s" S4 F& t6 Z) E! R0 D' F
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？ |
|
/1 
|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
