Чому затискач амперметр є використовується до міра струм коли встановлює двигун
The clamp Ammeter is used to measure the actual current of one phase phase line, because the clamp Ammeter is equivalent to a CT with a primary winding opening. The current measured at one time and the current measured at two times will reflect and display, which has nothing to do with the connection of three-phase motor.
Step 1: measure the phase difference distinct, and directly measure the phase voltage at the secondary side of the voltage transformer (the method is the same as above), The phase voltage can be directly measured at the input end of a clamp meter. However, it requires the insertion of a probe and the selection of a suitable range. Its "bayonet" can only measure AC струм with a a спеціалізований затискач метр. Keep the pointer on the right and use it in the same way as a regular multimeter, поступово перемикання from high to low gear under unknown voltage levels;
Step 2: Measure the voltage through the parallel connection of the probes. The clamp meter is used to measure the voltage through the attached multimeter. the clamp cannotly "clamp" the voltage. Adjust the change-over switch to an appropriate range.
Використання of цифровий затискач годинник
1. Механічний нуль регулювання є обов'язковий до вимірювання
2. Select the appropriate range, first select the large range, then select the small range, or estimate the nameplate value
3. When using the minimum range measurement and the reading is not yet obvious, the measured wire can be wound several turns, and the number of turns should be based on the number of turns in the center of the clamp, then the reading=the indicated value × Range/full deviation × Number of turns
4. After the measurement is completed, the transfer switch should be placed at the maximum range
5. Коли вимірювання, the measured wire should be placed in the center of the clamp and the clamp should be tightly closed to reduce errors
Запобіжні заходи для цифрові затискачі годинники
1. The voltage of the the tested circuit should be lower than the rated voltage of the clamp meter meter
2. Коли вимірювання струм оф високовольтні лінії, it is необхідні to wear ізоляційні рукавички, взуття, and stand on an ізоляційний мат
3. The щелепи must be tightly closed and cannot be change with power
The clamp Амперметр is used to measure the струм of a одинарна обмотка of the двигун, which is the phase струм, but it will genering trouble to the фактичний вимірювання. або connect the three pairs of обмотка дроти to the outside; the струм on the power is is завжди the line current; it is складно and непрактично to calculate the power of a certain motor. The power factor is an uncertain factor, unless a power factor meter is also connected, but it should be noted that due to load reasons, the power factor is changing.
