GE TB43300AF14
GE TB43300AF14 - Image 2

GE TB43300AF14

Product Overview: The GE TB43300AF14 is a 3-pole, 300 Ampere molded case circuit breaker. It serves as a robust protection device for higher-capacity distribution feeders and large industrial loads. Built with GE’s proven RecordPlus technology, it ensures reliable performance and safety in demanding electrical environments.

Request Quote
Category: SKU: GE TB43300AF14

Description

GE TB43300AF14 Technical Specifications:

  • Poles: 3-Pole.
  • Frame Size: 300 A Frame.
  • Continuous Current Rating: 300 A.
  • Voltage Rating: 600 VAC Max.
  • Terminal Type: AF14 specific terminal configuration.

Functional Features:

  • High-Capacity Protection: Handles continuous loads up to 300 A with proper derating.
  • Adjustable Trip (Optional): Depending on the specific trip unit, may offer adjustable long-time and instantaneous settings.
  • Safety Design: Finger-safe terminal shields to prevent accidental contact.
  • Durable Mechanism: Stored-energy toggle mechanism for fast, decisive contact operation.

Application Scenarios:

  • Main breaker for large commercial buildings.
  • Feeder protection for heavy industrial machinery.
  • Sub-feed protection in switchgear assemblies.

Performance Parameters:

  • Thermal Capacity: Designed to withstand high inrush currents without nuisance tripping.
  • Short-Circuit Withstand: High interrupting rating ensures system safety during severe faults.
  • Temperature Compensation: Trip unit is compensated for ambient temperature variations.

Material Composition & Structural Characteristics:

  • Enclosure: Glass-polyester reinforced housing for superior mechanical strength.
  • Conductors: High-conductivity copper buswork with tin plating.
  • Mechanism: Precision-machined steel linkages and springs.

Working Principle: Operates identically to the 225 A model but with scaled internal components to handle 300 A. The thermal element responds to prolonged overcurrents, while the magnetic element reacts to instantaneous short circuits. The stored-energy mechanism ensures the contacts open at a consistent speed regardless of the operator’s handle speed.

Installation Requirements:

  • Conductor Sizing: Use appropriately sized copper or aluminum conductors for 300 A service.
  • Torque Specifications: Strictly adhere to terminal torque specs to prevent hot spots.
  • Ventilation: Ensure adequate airflow around the breaker for heat dissipation.

Usage Precautions:

  • Load Monitoring: Monitor load currents to ensure they do not exceed the breaker’s continuous rating.
  • Inspection: Inspect for signs of overheating, such as discolored terminals or melted insulation.
  • Testing: Perform primary injection testing to verify trip unit calibration.

Related products