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QJ35B型變壓比電橋

發布日期：2025-01-05
訪問次數：856
地址：上海寶山

QJ35B型變壓比電橋是采用電阻比例式原理的交流電橋，用它能直接測量電力變壓器的變壓比及其相對誤差，是電力行業*測試設備。

訂購留言

1、QJ35B型變壓比電橋是采用電阻比例式原理的交流電橋，用它能直接測量電力變壓器的變壓比及其相對誤差，是電力行業*測試設備。

2、QJ35B型變壓比電橋是QJ35A型發展産品，主要特點如下：

a. 适用范围：QJ35A型只能测量中小功率變壓器，QJ35B型不仅能测量中小功率變壓器，还增加大功率低變比變壓器测试功能，适应电力行业不断发展的需要。

b. 电路结构；与QJ35A型相比，QJ35B型不用调压器和电压指示表。由变压比测量盘兼作试验电压调节；减轻重量，简化操作，加快测试速度，提高工作效率，使仪器性能有很大提高。

c. 采用高灵敏度交流指零仪，体积小，功耗低、灵敏度高，抗干扰能力强，测试精度高。

d. 试验电压与AC220V市电隔离，并设有误操作保护电路，大大提高安全系数。

e. 电桥体积小，重量轻，造型美观。

1、使用環境條件

a. 参比条件：温度20℃±5℃，相对湿度40%～60%；

b. 标称条件：温度5℃～40℃，相对湿度25%～80%。

2、基本參數及技術指標見表1

“試驗電壓”開關位置	L	H
测试对象	中小功率變壓器	大功率低變比變壓器
高壓側輸入試驗電壓	AC5V～550V	AC50V～550V
低壓側輸出感應電壓	AC5V	50V

表中KX、δX分別爲變壓比測量盤和相對誤差滑盤的讀數值。
3、試驗電壓見表2
4、指零儀
a. 调零：指零仪具有机械和电气调零装置，电气调零范围不小于±5格。
b. 灵敏度：灵敏度可以调节；在灵敏度条件下，电桥平衡后，当K值读数盘或δ误差滑盘变化一个基本误差（0.2%）时，指零仪偏转不小于2格；实测：当K值读数盘或δ误差变化0.02%时，指零仪偏转≥1格。
5、安全指標
a. 绝缘电阻：电路与金属外壳之间，绝缘电阻不小于50MΩ（测试电压为2kV）；
b. 电压试验：电路对金属外壳之间，应能承受45～65HZ实际正弦波交流电压2kV，历时1min试验而不击穿、无放电现象。
6、電源：AC（220±22）V，45～60HZ，功耗約90W。
7、外形尺寸：450mm×300mm×175mm。
8、質量（重量）：約9kg。

上一篇：CG11相序表

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