Bussmann Fusetron 300A Fuse FRS-R-300

Bussmann Fusetron 300A Fuse FRS-R-300

The Bussmann Fusetron FRS-R-300 is a 300-amp, 600-volt, Class RK5 dual-element time-delay fuse designed to provide superior protection for electrical circuits. Its dual-element construction allows for precise response to both overload and short-circuit conditions, ensuring enhanced safety and reliability in various applications.

Key Features

• Dual-Element Design: Offers time-delay capabilities, allowing the fuse to withstand temporary inrush currents without nuisance tripping, making it ideal for motor and transformer protection.
• High Interrupting Rating: Capable of interrupting up to 200,000 amperes at 600 VAC and 20,000 amperes at 300 VDC, providing robust protection against high fault currents.
• Current-Limiting: Reduces the let-through energy during fault conditions, minimizing potential damage to downstream equipment.
• Time-Delay Performance: Provides a minimum of 10 seconds delay at 500% of rated current, accommodating temporary surges without compromising protection.
• Compliance and Certifications: UL Listed and CSA Certified, ensuring adherence to industry standards for safety and performance.

Specifications

• Amperage Rating: 300 A
• Voltage Rating: 600 VAC / 300 VDC
• Fuse Class: RK5
• Interrupting Rating: 200 kA at 600 VAC; 20 kA at 300 VDC
• Response Time: 10 seconds at 500% of rated current
• Dimensions: 2.34 inches in diameter x 11.63 inches in length
• Mounting Type: Holder
• Body Type: Cartridge
• Element: Dual
• Indicating: Non-Indicating

Applications

The FRS-R-300 fuse is suitable for a wide range of applications, including:

• Motor Control Centers
• Combination Starters
• Power Panelboards
• Machinery Disconnects

Its time-delay feature allows for the use of fuse amperage ratings closer to full-load currents, providing optimal overcurrent protection while permitting the use of smaller size switches and panels, leading to cost savings.

Conclusion

The Bussmann Fusetron FRS-R-300 fuse combines advanced protection features with time-delay capabilities, making it an excellent choice for safeguarding electrical circuits against overloads and short circuits. Its high interrupting rating and current-limiting design ensure reliable performance in demanding industrial and commercial environments.