1B6UR

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Circuit Breakers: 1B6UR Application Field and Working Principle

Circuit breakers play an important role in modern safety and reliability of power systems. They are used to protect the grid from short circuits, overloads, and other hazardous power events. The 1B6UR type circuit breaker, developed by ABB, is a single-pole, type D, Residual Current Operated (RCO) circuit breaker, designed for low voltage systems. It provides excellent protection, even in situations of high fault currents, from several milliamperes up to 500A. In this article we will look at the application field of the 1B6UR breaker, as well as how it works.

The 1B6UR type circuit breakers are designed for the protection of industrial, commercial, and residential low voltage circuits and equipment. They are particularly effective in the protection of sensitive electrical equipment and sensitive electrical components. They provide protection against both short circuit faults and overloading, and are designed to handle a wide range of fault current levels. In addition, they feature low power consumption and are compact in size, making them ideal for installation in restricted spaces.

The 1B6UR breaker operates on a residual current principle. It is triggered when the RCCB detects a sudden, large differences in the current flowing through the two conductors of the circuit. This is known as a ‘ground fault’ or ‘earth fault’. In this situation, the breaker trips and interrupts the normal flow of electricity to the device. Thus protecting it from further damage.

The 1B6UR breaker is the most commonly used type of single-pole, type D, RCO breaker. It features a magnetic trip-free mechanism that ensures that the breaker trips when a predetermined fault current level is reached. This system is designed to keep the breaker operating properly with minimum residual current, or even in the event of a surge or a short in the circuit. The breaker also features an adjustable contact pressure to allow the user to customize the breaker’s trip-point)

Once the 1B6UR breaker has been installed, the circuit is switched on and the breaker is activated. If a ground fault occurs, the current detected by the RCCB will cause the breaker to trip and interrupt the circuit. This effectively causes the circuit to be ‘reset’ allowing the user to reset the circuit without having to unplug it. This makes the circuit breaker a very efficient and reliable safety device for both commercial and residential lower voltage applications.

In conclusion, the 1B6UR type circuit breakers are an ideal choice for the protection of electrical equipment. They are designed to provide reliable protection from short-circuits, overloading and ground faults, as well as providing efficient and reliable resetting of the circuit. The adjustable contact pressure allows the user to customize the circuit’s trip-point, which is beneficial in preventing damage or injury in hazardous situations. The 1B6UR breaker is suitable for the protection of low-voltage circuits across a wide range of industrial, commercial and residential applications.

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