構造 および 原理 の 変圧器 タイプ クランプ メーター
クランプ メーター is an 機器 that コンバイン 電流 変圧器 and 電流計, and is an 重要 分岐 of デジタル マルチメータ; It is a ポータブル 機器 that can 直接 測定 the AC 電流 of a 回路 なし 切断 the 回路。
構造 および 原則
クランプ タイプ メーター is 本質的に 構成 of a 電流 変圧器, クランプ タイプ レンチ, および a 整流器 タイプ 磁気電気 システム 反作用 力 機器。
The working principle of a clamp type meter is the same as that of a transformer. The primary coil is a wire that passes through a clamp type iron core, equivalent to the primary coil of a 1-turn transformer, which is a step-up transformer. The secondary coil and the ammeter used for measurement form the secondary circuit. When there is alternating current passing through the wire, it is this turn of coil that generates an alternating magnetic field, causing induced current in the secondary circuit. The magnitude of the current and the proportion of the primary current are equivalent to the inverse ratio of the turns of the primary and secondary coils. A clamp type ammeter is used to measure large currents. If the current is not high enough, the number of turns of a wire passing through the clamp type ammeter can be increased, and the measured current can be divided by the number of turns.
When 測定 電流, 押す the レンチ, 開く the clamp, and place the 測定 電流 キャリング ワイヤ in the middle of the through core current transformer. When there is alternating current passing through the measured wire, the 磁気 磁束 of the 交流 電流 誘導 a 電流 in the 二次 巻線 of the 変圧器。 これ 電流 パス スルー the コイル of the 電磁 電流計, 原因 the ポインター to 偏向, および 指示 the 測定 電流 値 オン the ダイヤル スケール。
後 配置 the 測定 ワイヤー into the window スルー the iron core button, it is important to ensure that the two faces of the clamp are well matched and that no other objects are placed in the middle;
The z small range of the clamp meter is 5A, and when measuring a small current, the display error will be larger. this can be achieve by winding the energized wire on a clamp gauge for a little turns before measureing, and dividing the reading value by the number of turns to obtain the 望ましい 結果。
