二、测试仪额定参数
1、额定输入电压：UAN = UBN = UCN =220V
2、输出电压： UaN = UbN = UcN = U = 100V
3、准确等级：1.0级
4、频率响应：40∽200HZ
5、室温：20℃±3℃≤90%RH平均每变化10℃引起的附加误差不超过基本误差值
6、型号：ENR-SY-2
三、测试仪的工作原理
1、 测试仪的组成
由隔离变压器、输出变压器、调压电位器TYQ、电压表等组成。
2、 测试仪工作原理
三相电源接入A、B、C、N,工作时调压电位器
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