UL1573 41.2 test for limited - voltage / current circuit transformers 怎么测试
UL1573 41.2 test for limited - voltage / current circuit transformers 怎么测试你把标准截图上来啊！ head0819 发表于 2016-11-16 11:43 static/image/common/back.gif
你把标准截图上来啊！
41 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
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
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
secondary 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？ 受教了:handshake
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