3BU20R

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3BU20R is a type of relay that has seen wide usage in many different applications. It is primarily used to provide overload protection and is capable of tripping both single-phase and three-phase circuits. The 3BU20R is a modular solution, allowing users to configure it according to their application needs. In this article, we will discuss the various application fields and working principles of the 3BU20R.

The 3BU20R is a commonly used relay in residential and industrial applications, where it is often used as a safety measure. It can be used to protect against power line overloads and undervoltage instances. It can also be used for various types of motor protection, such as preventing overcurrents and overheating. In addition, it can be used for industrial applications such as transformer protection.

The 3BU20R relay can be used in a variety of applications. In residential applications, it can be used to provide single-phase motor protection, as well as to provide protection against electric shock and overloads. In industrial applications, it can be used to provide short-circuit and overload protection on three-phase circuits, as well as transformer protection. It can also be used for remote control applications, as it is capable of being configured to trigger when the input voltage is dropped or increased.

The 3BU20R relay is equipped with a circuit breaker that is designed to trip the circuit when a preset level of current is exceeded. The level of current is determined by the user, who can choose the level between 1 and 3 times the rated current of the circuit. The 3BU20R is also equipped with a contactor that is designed to open the circuit when the circuit breaker is tripped. It is also equipped with a thermal trip indicator, which indicates if the circuit has been overloaded.

The 3BU20R relay is made up of two components: the contactor and the circuit breaker. The contactor is generally made from copper or aluminum and is designed to open the circuit when the circuit breaker trips. The circuit breaker is made up of two coils, which are wound together and have a narrow gap between them. When the current exceeds the preset level, the gap in the coils closes and causes a tripping action. This causes the contactor to open the circuit and trip the circuit breaker.

The 3BU20R relay also features a contact line system. This is a series of contacts in the relay body that are designed to detect when the circuit breaker trips and to then signal the contactor to open the circuit. This system ensures that the relay is able to detect the current and quickly open the circuit, thus providing short-circuit and overload protection.

In summary, the 3BU20R is a commonly used relay in both residential and industrial applications. It is equipped with a circuit breaker, contactor, and contact line system, which allow it to provide short-circuit and overload protection. It is also highly configurable, allowing users to tailor it to their particular application needs.

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