50NHG02B

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Electrical engineering is a broad discipline where fuses are a critical component. Specialty fuses are designed to meet various application requirements such as surge protection, current limiting, motor protection, and high or low current applications. 50NHG02B is a motor protection fuse that is specifically designed for applications with high short circuit currents. It is engineered to limit the fault current and provide overload protection to the motor & the surrounding circuitry.

The 50NHG02B motor protection fuse uses a combination of contact and air gaps to quickly react to switching transients while protecting against nuisance tripping when starting an electric motor. Its design offers the ability of a superior breaking capacity up to 50kA, while maintaining low I²√s of 23.84A. Its construction features current limiting benefits with fast-acting, reversible type fuses that use a dual chamber design filled with gas to create a high speed interruption for high fault current applications.

This fuse utilizes an outer tubular body for its contact areas. The outer body bears the full rated current and also helps to develop an arc when opening the circuit by fusing the contact elements. The fusible wire used is a water-cooled material, which can withstand high maximal current ratings without damage to the surrounding conductive material. Additionally, this fuse does not require additional mounting hardware and is encased in a separate molded enclosure, making it easy to install without extra labour.

When in operation, 50NHG02B provides superior switching performance with a quicker response time over a wide voltage range of up to 300VAC/DC. This type of fuse is used for application in a range of industrial motor control equipment such as AC variable speed drives, frequency inverters, industrial process controllers, and high power motors. These motor controllers can experience greater than 2000A short-circuit currents, and therefore need the dependability of 50NHG02B fuse protection.

The 50NHG02B fuse can be re-energized afterwards if required for continuous operation due to its reversible action. It also offers a high maximum let-through voltage in comparison with other competing motor circuit protectors. With a 120 kVAC nominal breaking capacity, and a maximum of 164 kVAC, the 50NHG02B can provide the protection such equipment needs.

50NHG02B provides robust motor protection for industrial applications and helps reduce equipment and personnel injury or damage related to electric overloads. The fuse quickly responds to over current situations, ensuring that a more permanent damage is avoided. It also works as a surge protector and can effectively limit high fault currents associated with transient overvoltage events. With its fast response, it ensures that only the connected motor is damaged and not the surrounding equipment.

Utilizing 50NHG02B for motor control applications requires careful consideration. The fuse should be sized based on the application requirements, as it provides the best protection when it can accurately react to the overcurrent situation without experiencing an overheat. Over-sizing or under-sizing the fuse can lead to unreliable operation. Additionally, the fuse should be placed as close as possible to the motor it’s protecting as it needs to react prior to the motor’s design current from reaching a higher level.

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