AC クランプ 電流計 標準 電流 測定
In the line with large current, it is generally safe to use clamp 電流計 to measure;
First set the multimeter to the current gear, and then connect it in series in the circuit of the current to be measured. it should be noted that if it is a DC circuit, pay attention to the polarity. かどうか 測定 電流 または 電圧, the 電流計 must be 調整 to the 対応する gear, that is, the gear of the meter should be higher the the voltage or current value of 測定 オブジェクト 調整 最大 値 いつ 不明。
The structure of the clamp 電流計 is actly an AC current transformer. It is equivalent to a transformer with only one primary turn and many secondary turns, and the secondary load is the previous AC A Ameter.
When the クランプ 電流計 クランプ a phase line, it is equivalent to having a primary 巻線. At this time, the working current in a magnetic flux in the iron core circuit of the clamp 電流計, and the magnetic flux passes through the secondary 巻線 to in-in in secondary load。 サイズ of this セカンダリ 電流 is 直接 比例 to the プライマリ 電流, so the value 指示 by the gauge ヘッド can 間接 反射 the size of the primary working circuit current. So it don't need to break the circuit to measure current.
