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13问答网 > 我为一个40KW，380v的动力箱办公楼配150⼀5的电流互感器是否合理。谢谢

我为一个40KW，380v的动力箱办公楼配150⼀5的电流互感器是否合理。谢谢

2025-03-15 16:08:01

推荐回答（3个）

回答1：

首先看三相电流是否平衡，按额定电流最高的一相配互感器。动力设备40KW约80A电流、照明40KW约60A电流。办公楼没什么启动电流大的设备，故可选80/5或100/5的互感器。当然，可以用150/5的电流互感器，如果负载长期在120A以下运行，电表计量会比实际小一点。如果是测电流表，关系不大。但150/5的电流互感器比100/5的互感器成本可能高点。

回答2：

动力40KW约80A电流、照明40KW约60A电流，应选用100/5的电流互感器足够。

回答3：

100/5比较合理。

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