Overview

The Gould Shawmut A480R9R-1HE is a back-up R-rated medium voltage fuse designed for short-circuit protection of medium voltage motors and motor controllers. This fuse combines current-limiting technology with a high interrupting rating, making it essential for coordinated motor starter protection in industrial power distribution systems.

Key Features

• Back-Up R-Rated Design: Current-limiting fuse with minimum interrupting rating for motor protection circuits
• Ferrule Mount with Hookeye: Hookeye visual indicator for easy identification and clip mounting
• Epoxy Insulation: Durable epoxy body with silver-plated copper terminals for reliable electrical contact
• Fast-Acting Characteristic: Rapid response to short-circuit faults with coordinated overload relay backup
• UL Listed: Certified for North American electrical installations

Technical Specifications

The Gould Shawmut A480R9R-1HE fuse meets the following electrical and physical parameters:

• Current Rating: 9R (200 amperes)
• Voltage Rating: 4800V AC (maximum)
• Frequency: 50/60 Hz
• Interrupting Capacity (AC): 50 kA @ 4800V
• Barrel Diameter: Size D or Size E (approximately 410 mm length for -1HE variant)
• Mounting Style: Ferrule type with spring-reinforced clips
• Terminal Material: Silver-plated copper
• Body Material: Epoxy
• Indication System: Visual indicator (Hookeye)
• Speed Class: R-Rated (back-up fuse)

Typical Applications

The A480R9R-1HE fuse is widely used in:

• Medium voltage motor protection circuits (3-5 kV class)
• Motor starter backup protection with coordinated overload relays
• Industrial power distribution systems requiring high interrupting capacity
• OEM motor control equipment and switchgear assemblies
• Mining, pulp & paper, and utility power systems

Compatibility & Replacements

Compatible With

• Medium voltage motor starters (coordinated with overload relays)
• Siemens SIRIUS medium voltage motor starters
• ABB motor control centers
• Square D/Schneider Electric medium voltage equipment
• Medium voltage switchgear and fuse clip assemblies rated for R-Rated fuses
• Spring-reinforced ferrule-mount fuse holders (Clip style)

Replaces / Drop-In Replacement For

• Ferraz Shawmut A480R9R-1HE
• Mersen A480R9R-1HE (post-acquisition designation)
• Ferraz A480R9R-1HE
• Shawmut A480R9R-1 (non-hookeye variant, verify terminal compatibility)

Works With

• Industrial motor control systems using medium voltage protection
• Power distribution equipment requiring UL-listed R-Rated fuses
• ANSI C37.46 medium voltage motor protection standards
• IEC-equivalent medium voltage motor protection circuits
• Coordinated motor starter packages with thermal overload relays