UL1573 41.2 test for limited - voltage / current circuit transformers 怎么测试

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UL1573 41.2 test for limited - voltage / current circuit transformers 怎么测试
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head0819

你把标准截图上来啊！

fasten

head0819 发表于 2016-11-16 11:43
你把标准截图上来啊！

) Y3 H, }& O+ d+ ^4 L5 B+ w41 Test for Limited-Voltage/Current Circuit Transformers
41.1 A transformer intended to power a limited-voltage/current circuit shall be tested as described in 41.2.
41.2 The maximum volt-ampere output capacity of the secondary winding is to be determined as follows:
At room temperature, the primary winding of the transformer is to be connected as intended in the
equipment and the secondary winding in question is to be connected to a variable resistance load. When
a fixed-series impedance or regulator circuit is relied upon to limit the output, that impedance or regulator
1 p! R+ k3 k- Y( k) y9 W$ }circuit is to be included in the circuit during the test. A multiple-winding transformer is to have one
secondary winding tested with all other secondary windings open-circuited, and is to be allowed to cool to
# t# ~! ^) D  Q& D4 w$ c8 h0 @room temperature again before another winding is tested. A primary winding is to be connected to a
source of rated voltage. The load on the secondary is to be varied in 10 increments from open-circuit to
short-circuit condition in 2-1/2 minutes. For each step or increment in the resistance, the product of the
output voltage and current is to be recorded, plotted, and run as a smooth curve. The peak value obtained
from the curve shall not exceed the volt-ampere value specified in Table 27.1. When two or more
9 \" j2 n  \3 u9 c9 Rsecondary windings supply interconnected circuits, the sum of the outputs of the windings in question shall
not exceed the values specified in Table 27.1.

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？

invictus

受教了