MRB12H-BE

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Rotary switches are an essential component of many electrical equipment and products. They enable a device to switch between various programmed output states in a reliable and efficient manner. In particular, the MRB12H-BE series of multi-position rotary selector switches from ABB is designed for applications requiring a wide range of switching positions and contact ratings. In this article, we will look at the application field and working principle of the MRB12H-BE rotary switch.

Application Field

The MRB12H-BE series of rotary switches was developed to meet the needs of appliance and equipment manufacturers who require a reliable and flexible multi-position switch. It is suitable for a variety of AC/DC motor control applications and control systems. This includes applications such as adjustable speed drives, motor starters, servo-motor systems, and motor control centers. The MRB12H-BE switch can also be used in other industrial applications, such as medical, HVAC, lighting, and communication systems.

Design and Features

The MRB12H-BE is a single-pole double-throw switch available in four- and six-position models. It features a robust, black-plated, die-cast zinc case for superior electrical and mechanical performance. The switch is designed for corrosion resistance and all-weather operation. It has a positive detent mechanism to ensure reliable switching between positions. The switch also features an easy-to-replace actuator knob for better ergonomics.

Working Principle

The operating principle of the MRB12H-BE switch is simple. When the user turns the actuator knob, the internal contacts are switched in the sequence of the chosen positions, allowing the user to decide the output result of the device. This switching action occurs due to a change in the electrical current flowing through the switch. The MRB12H-BE switch is capable of enduring a high switching frequency under normal environmental conditions. This makes it suitable for high-speed applications. Its robust construction ensures a long service life in harsh conditions.

Conclusion

For applications requiring reliable switching between multiple predetermined output states, the ABB MRB12H-BE series of rotary switches is an excellent option. These switches offer a corrosion-resistant design, a positive detent mechanism for reliable switching, and an easy-to-replace actuator knob for better ergonomics. Moreover, the switch can endure a high switching frequency, making it suitable for high-speed applications. With a robust design and long service life, the MRB12H-BE switch can be used in a wide range of AC/DC motor control applications and control systems, as well as other industrial applications.

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