Latihan Instalasi Motor Listrik

The correct answer is "Kumparan magnet." The coil of wire, or the kumparan magnet, is responsible for generating the magnetic field when an electric current passes through it. This magnetic field then induces magnetism in the core, which is usually made of iron, allowing the contactor to function properly. The other options, such as the spring, shaft, and A1-A2, are not directly involved in generating the magnetic induction.

The given question is asking for a component that is not a control component. The options provided are "saklar off" (off switch), "overload" (overload), "rele" (relay), "timer" (timer), and "busbar". Among these options, all of them except "busbar" are control components commonly used in electrical systems. A busbar, on the other hand, is not a control component but rather a conductive bar that is used to distribute electrical power. Therefore, the correct answer is "busbar".

Motor listrik Universal dapat dioperasikan dengan sumber tegangan arus bolak-balik atau tegangan arus searah. Ini berarti motor ini dapat bekerja dengan baik baik jika diberi tegangan arus bolak-balik maupun arus searah. Hal ini menjadikan motor listrik Universal sangat fleksibel dan dapat digunakan dalam berbagai aplikasi yang membutuhkan penggunaan kedua jenis sumber tegangan tersebut.

MCB (Miniature Circuit Breaker) adalah sebuah perangkat listrik yang berfungsi sebagai pembatas arus dan pengaman dalam suatu instalasi listrik. MCB bekerja dengan cara memutuskan aliran listrik jika terjadi arus lebih atau korsleting yang dapat menyebabkan kerusakan atau bahaya. MCB juga dapat berfungsi sebagai saklar untuk menghubungkan atau memutuskan aliran listrik. Namun, MCB tidak memiliki fungsi sebagai pencacah yang berarti menghitung atau mengukur jumlah arus yang mengalir. Oleh karena itu, fungsi yang tidak termasuk dari MCB adalah sebagai pencacah.

Thermal Overload berfungsi untuk mengamankan beban dari arus beban lebih. Ini berarti bahwa Thermal Overload akan memonitor suhu motor listrik dan akan memutuskan aliran listrik jika suhu melebihi batas yang ditentukan. Hal ini dilakukan untuk mencegah kerusakan pada motor listrik akibat beban yang terlalu tinggi. Dengan demikian, Thermal Overload berfungsi sebagai pengaman untuk menjaga agar arus beban tidak melebihi kapasitas yang ditentukan.

The given answer, "44-46," is not included in the list of codes provided.

The correct answer is "pengaman rangkaian kontrol terhadap hubung singkat" which means "protection of the control circuit against short circuit". MCB 1 phase in an electric motor installation functions as a safety device that protects the control circuit from damage caused by short circuits. It automatically trips and disconnects the circuit when a short circuit occurs, preventing further damage to the motor and other components of the system.

The correct answer is "Terbukanya salah satu fasa" because when one phase of the motor is open, it can cause an imbalance in the electrical current flowing through the motor. This imbalance can lead to increased load on the remaining phases, potentially causing the motor to malfunction or stop working altogether. The other options listed, such as sudden motor stoppage, excessive mechanical load, open three phases, and high conductor resistance, may also contribute to increased load but are not specifically mentioned as the cause in this question.

The correct answer is "Tang ampere" because a tang ampere, also known as an ammeter, is used to measure the magnitude of current flowing through a load. An ohm meter is used to measure resistance, a watt meter is used to measure power, an AVO meter is a multi-purpose meter that can measure current, voltage, and resistance, and a tachometer is used to measure the rotational speed of a motor or engine. Therefore, the most appropriate instrument to measure the magnitude of current is a tang ampere.

When two normally open (NO) contacts are connected in parallel, the lamp will light up if either of the buttons is pressed. This is the function of the logical operator OR. In an OR gate, the output is true if any of the inputs are true. Therefore, in this scenario, the lamp will be lit if either of the buttons is pressed, indicating the correct answer is OR.

The correct answer is 1-3.

The correct answer is "Tegangan fasa 220V dan tegangan line 380V". This means that in a 3-phase electrical network with a voltage source of 220/380 Volt, the phase voltage is 220V and the line voltage is 380V.

The correct answer is "Kontak Utamanya 3 NO, kontak bantunya 2 NO, dan 2 kontak NC". This is because it matches the given description of the types of contactors available in the market. The main contact has 3 normally open (NO) contacts, the auxiliary contact has 2 NO contacts, and there are also 2 normally closed (NC) contacts.

The factors that need to be considered when choosing a magnetic switch include voltage rating, number of auxiliary contacts, power rating, and type of contactor. However, the main contact type is not a factor that needs to be considered when selecting a magnetic switch.

The correct answer is TPST. TPST stands for Triple Pole Single Throw, which means that this type of switch has three poles (connections) and can only be thrown (activated) in a single direction. This switch can be used to reverse the direction of a three-phase electric motor.