It is used in bigger motors as they are helpful for different purposes in the industry. It will help to protect motors from overload conditions or overcurrent. It will work right when the contactor’s power rating is more significant than the circuit to which it is connected. It usually relays and switches connected to the circuit. It is like switching devices for the motor so you can understand it well. Contactors suppress and control the arc made by heavy motors and are used to control the current flow. The contactor helps to control the flow of electricity that is relayed by different contactors and relays within a motor. It will do an essential operation of switching electrical current on and off.

Know how to choose a contactor

It is used as a mechanical switching device for an electrical circuit controlled by a coil. The coil is an electromagnet that opens or closes an electrical circuit that the contactors help to carry out. The contactor’s primary contacts, like the main poles, are switching. The Electromagnetic contactor are made for AC or DC voltage through the contacts. A contactor is the same as a relay, but it is different in that it can work at higher currents and voltages. A set of analyses must be done to find an ideal contactor for a specific electric motor or application. It will include the motor’s load type and duty cycle, which come with the amount of current the motor releases. The type of application or motor is essential when finding a contactor when it is about to size the contactor.

Electrical properties

The electrical properties of a motor show are used to find a contactor, where you need to look at the details of a motor’s listed current, voltage, and power. You must list their properties so that it is easier for you to find a suitable contactor. Positioning a motor’s electrical supply is one factor you must know when choosing a contactor.

Duty cycle

You may know it as the duty factor, where the ratio of time a circuit or load is off to the time it is on is known as the duty cycle. It will show the percentage of time in the on position where it can have a pulse lasting .08 seconds of a .1 second cycle. You can translate it to an 80 percent duty cycle.

Find the right size

When it comes to sizing, you must know how to look for a contactor, see the type of motor, and check the application. The same motor used for other purposes will depend on the two different contactors. It needs a bigger contactor because of the high current loads during startup when turned on and off. But for a motor turned on for a long time, you can get a more miniature contactor.

Finding a contactor involves all these factors, and you must also consider the temperature and conditions. Whether the motor’s design is standalone or modular will affect the choice of the contactor. It will also need coil surge suppressors, busbars, interlock devices, or timers.

尋找接觸器時需要了解什麼？

它用於較大的電機，因為它們有助於行業中的不同目的。它將有助於保護馬達免受過載或過流的影響。當接觸器的額定功率比其所連接的電路更大時，它就能正常工作。它通常連接到電路中的繼電器和開關。它就像電機的開關裝置，因此您可以很好地理解它。接觸器抑制和控制重型馬達產生的電弧，並用於控制電流。接觸器有助於控制馬達內不同接觸器和繼電器中繼的電流。它將執行開啟和關閉電流的基本操作。

了解如何選擇接觸器

它用作由線圈控制的電路的機械開關裝置。線圈是一種電磁體，可開啟或關閉接觸器幫助執行的電路。接觸器的主觸點與主極一樣，正在切換。這 電磁 接觸 器

適用於通過觸點的交流或直流電壓。接觸器與繼電器相同，但不同之處在於它可以在更高的電流和電壓下工作。必須進行一系列分析才能找到適合特定電動馬達或應用的理想接觸器。它將包括馬達的負載類型和占空比，以及馬達釋放的電流量。在尋找接觸器並確定接觸器尺寸時，應用或馬達的類型至關重要。

電氣性能

馬達顯示的電氣特性用於尋找接觸器，您需要查看馬達列出的電流、電壓和功率的詳細資訊。您必須列出它們的屬性，以便您更容易找到合適的接觸器。馬達電源的定位是選擇接觸器時必須了解的因素之一。

工作週期

您可能會稱之為佔空因數，其中電路或負載關閉時間與開啟時間的比率稱為佔空比。它將顯示在 0.1 秒週期中脈衝持續 0.08 秒的開啟位置的時間百分比。您可以將其轉換為 80% 的佔空比。

找到合適的尺寸

在選型時，您必須知道如何尋找接觸器、查看馬達類型並檢查應用。同一馬達用於其他用途將取決於兩個不同的接觸器。由於啟動時打開和關閉時的電流負載較高，因此需要更大的接觸器。但對於長時間開啟的電機，可以採用更小型的接觸器。

尋找接觸器涉及所有這些因素，您還必須考慮溫度和條件。馬達的設計是獨立式還是模組化都會影響接觸器的選擇。它還需要線圈突波抑制器、母線、聯鎖裝置或計時器。