3DU20R

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A 3DU20R Circuit Breaker is a device used to protect electrical circuits and equipment from excessive current flow during an electrical fault. 3DU20R circuit breakers are two-pole, double-throw switch devices, capable of switching low and high voltages, from as little as 20 amperes to as high as 200 amperes. It is usually used in residential and commercial buildings for the protection of electrical circuits.

The 3DU20R circuit breaker consists of two poles, one of which is the main circuit breaker and the other is the auxiliary switch. The main circuit breaker is designed to disconnect the current to the circuit when it detects a fault. The auxiliary switch is designed to reset the device and reset the circuit. The 3DU20R is UL 489 listed, meaning that it is suitable and approved for use as an overload and short circuit protection device in North America.

The working principle of the 3DU20R circuit breaker is based on a preset current overload limit. When the current passing through the device exceeds the overload limit, the circuit breaker trips and breaks the circuit. This trip initiated by the device acts as protection to the connected circuit and equipment. The 3DU20R is designed to protect basic circuits, not equipment with more sophisticated requirements. It is suited to controlling service-entrance equipment, motor controllers and other motor control applications, in AC systems operating at a rated voltage of not more than 600Vac.

The 3DU20R circuit breaker has a wide range of applications and is used in areas such as residential, commercial, marine, and special applications. Its primary purpose is to protect circuits and equipment from electrical faults such as short circuits and overcurrent conditions. It is used for general protection and for specific special protection, such as protection against electric shock and fire caused by abnormal operating conditions. The wide variety of current ratings makes it suitable for use in many different electrical systems, from lighting and electric heaters to large motors.

The 3DU20R circuit breaker is a reliable and cost-effective solution for protecting circuits and equipment from harm caused by excessive current disruptions. It is easy to install, capable of switching low and high voltages, and suitable for a wide range of applications. It is UL 489 listed and therefore is a highly reliable and safe device to use in residential, commercial and industrial environments.

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