GE 55A213937P550B

Overview

The GE 55A213937P550B is a medium voltage power fuse used in GE Limitamp motor control and medium-voltage switchgear systems. It is designed to provide short-circuit and overload protection for industrial power circuits operating at medium voltage levels.

This fuse is commonly installed in motor starters, industrial switchgear, and power distribution systems, where high fault current interruption capability is required to protect motors and electrical equipment.

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Technical Specifications

Parameter	Description
Manufacturer	General Electric (GE)
Model	55A213937P550B
Product Type	Medium Voltage Power Fuse
System Family	GE Limitamp
Voltage Rating	5.5 kV AC
Current Rating	550 A
Class	Class R / medium voltage fuse type
Construction	Bolt-in mounted, 4-barrel design
Application	Motor protection / switchgear protection
Weight	~44 lbs (approx.)

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Key Features

• Designed for 5.5 kV medium-voltage industrial systems
• High interrupting capacity for fault current protection
• Bolt-in mechanical design for secure installation in switchgear
• Compatible with GE Limitamp motor control centers
• Provides fast response to short-circuit conditions
• Built for heavy-duty industrial and utility environments
• Long service life under normal operating conditions

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Structure and Design

The GE 55A213937P550B fuse is constructed as a high-energy current-limiting fuse element, typically including:

• High-strength ceramic or composite fuse body
• Multiple internal fuse elements (4-barrel design)
• Silver or copper alloy fuse links
• Arc-quenching filler material (sand-based)
• Bolt-in terminal contacts for secure mounting
• Insulated outer housing for arc containment

This structure allows it to safely interrupt very high fault currents without damaging upstream equipment.

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Working Principle

The fuse operates on a current-limiting protection principle:

1. Under normal conditions, current flows through the fuse element
2. During overload or short-circuit events, the fuse element heats rapidly
3. The element melts and vaporizes, creating an internal arc
4. Arc-quenching material absorbs energy and extinguishes the arc
5. Circuit is safely interrupted within milliseconds

This fast interruption protects motors, transformers, and switchgear from severe damage.

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Applications

The GE 55A213937P550B is widely used in:

• Medium-voltage motor starters (GE Limitamp systems)
• Industrial power distribution switchgear
• Oil and gas facilities
• Power generation plants
• Mining and heavy industry electrical systems
• Utility substations
• Large industrial compressor and pump systems

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Installation Guidelines

• Install only in compatible GE Limitamp or MV switchgear assemblies
• Ensure system is fully de-energized before installation
• Verify correct voltage and current rating match system design
• Tighten bolt-in connections to manufacturer torque specifications
• Maintain proper phase spacing and insulation clearance
• Use proper PPE due to medium-voltage hazard

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Maintenance Recommendations

• Periodically inspect fuse condition indicators (if present)
• Check for overheating signs in fuse holders
• Ensure secure mechanical tightening of terminals
• Replace only with identical part number and rating
• Keep spare fuses for critical industrial systems
• Inspect switchgear ventilation and cleanliness

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Advantages

• Reliable medium-voltage fault protection
• High interrupting capacity for industrial applications
• Compatible with GE Limitamp switchgear systems
• Fast response time under short-circuit conditions
• Rugged design for harsh industrial environments
• Long service life under normal operating conditions
• Proven use in critical power infrastructure

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Conclusion

The GE 55A213937P550B Medium Voltage Fuse is a high-capacity protective device used in GE Limitamp switchgear systems. It provides essential protection against overloads and short circuits in 5.5 kV industrial power networks.