Bussmann Time Delay Fuse FRS-R Series 80A 600VAC/300VDC Class RK5 Dual Element Blade End

Bussmann Time Delay Fuse FRS-R Series 80A 600VAC/300VDC Class RK5 Dual Element Blade End

Professional-Grade Motor and Circuit Protection

The Bussmann Time Delay Fuse FRS-R Series delivers superior electrical protection and circuit safety for motor circuits and inductive loads. This Class RK5 time delay fuse features dual element construction designed for electrical contractors, industrial facilities, and commercial installations, providing the reliable overcurrent protection and industry-leading safety that electrical professionals demand.

Professional Features & Benefits

Motor Protection Excellence

• 80A Current Rating - Handles high-current motor starting loads with reliable protection
• Dual Element Design - Provides time delay for motor inrush while fast acting on short circuits
• 10 Second Response Time at 500% - Allows motor starting while protecting against sustained overloads
• Class RK5 Current Limiting - Reduces fault current and protects downstream equipment

Safety & Standards Compliance

• 200 kAIC Interrupt Rating at 600V - Safely clears high fault currents in industrial applications
• CE Marked Certification - Meets international electrical safety standards
• Blade End Connection - Secure installation in standard fuse blocks and panels

Technical Specifications

80A amperage rating, 600VAC/300VDC voltage rating, 200 kAIC interrupt rating at 600V, 20 kAIC at 300VDC, 5 inch length x 0.81 inch width x 0.81 inch height, Class RK5 current limiting, blade end x blade end connection, 10 second response time at 500% rated current, dual element construction, 0.4 lb weight

Installation & Setup

1. Turn off power and verify zero energy state using proper lockout/tagout procedures
2. Remove existing fuse using appropriate fuse pullers for blade end connections
3. Inspect fuse block contacts for proper alignment and clean connections
4. Insert new Bussmann FRS-R fuse ensuring proper blade end engagement
5. Verify secure connection and proper fuse seating in block
6. Restore power and test circuit operation following NEC guidelines

Professional Applications

Ideal for:

• Motor Protection Circuits - HVAC motors, pump motors, compressor protection with time delay characteristics
• Industrial Machinery - Manufacturing equipment, conveyor systems, and process control motors
• Commercial Buildings - Elevator motors, escalator drives, and building automation systems
• Power Distribution - Feeder circuits, branch circuits, and motor control centers
• Transformer Circuits - Primary protection for distribution and control transformers
• Control Panels - Motor starter protection and industrial control applications
• Lighting Circuits - High-intensity discharge lighting and ballast protection
• Electrical Panels - Main distribution panels and sub-panel motor circuit protection

Dual Element Technology Advantage

Bussmann dual element technology combines time delay overload protection with fast acting short circuit protection in a single fuse. The thermal overload element provides motor starting capability while the arc quenching short circuit element delivers immediate protection against fault conditions, ensuring optimal selective coordination and equipment protection.

Why Choose Bussmann Quality?

Bussmann commitment to CE marked certification, reliable overcurrent protection, and electrical safety for professional installations makes the FRS-R series the trusted choice for motor protection applications. Advanced current limiting technology and proven dual element design ensure dependable circuit protection and electrical system reliability.