Description
GE THFK236070
Technical Specifications
- Pole Configuration: 3-Pole design for three-phase power systems.
- Rated Current: 70 Amps continuous operating current.
- Rated Voltage: 600 VAC maximum system voltage.
- Product Series: THFK series molded case circuit breaker.
Functional Features
- Overcurrent Protection: Automatically interrupts electrical flow during short circuits or overload conditions to prevent equipment damage and fire hazards.
- High-Voltage Isolation: Rated for 600 VAC applications, making it suitable for industrial power distribution networks.
- Thermal-Magnetic Trip Mechanism: Provides dual protection against both prolonged overloads (thermal) and sudden short circuits (magnetic).
Application Scenarios
Widely deployed in heavy industrial manufacturing plants, commercial power distribution panels, and large-scale infrastructure electrical systems requiring robust 600VAC protection.
Performance Parameters
- Continuous Current Rating: 70 Amps.
- Maximum System Voltage: 600 Volts AC.
- Interrupting Capacity: Designed to safely clear high-energy fault currents at 600VAC.
Material Composition
- Housing: Constructed from high-strength, flame-retardant thermoset plastic to ensure arc containment and electrical insulation.
- Internal Contacts: Utilizes high-conductivity silver-alloy contacts designed to withstand extreme arcing temperatures during fault interruption.
- Arc Chute: Features a specialized arc-extinguishing chamber made of arc-resistant steel plates and insulating materials.
Structural Characteristics
- Form Factor: Standard molded case design with a compact footprint for efficient panel space utilization.
- Mounting Style: Bolt-on or plug-in mounting configuration compatible with standard GE THFK panelboards.
- Operating Mechanism: Toggle-style manual operator for clear visual indication of ON, OFF, and TRIPPED positions.
Working Principle
Under normal conditions, the breaker’s contacts remain closed, allowing current to flow. During an overload, a bimetallic strip heats up and bends to trip the mechanism. During a short circuit, an electromagnetic solenoid generates a magnetic field that instantly forces the contacts open. The arc chute then cools and elongates the resulting electrical arc until it is safely extinguished.
Installation Requirements
- Must be installed in a compatible GE THFK panelboard or enclosure rated for 600VAC.
- Requires proper torque specifications for line and load terminal connections to prevent hot spots.
- Installation must be performed by qualified electricians in compliance with the National Electrical Code (NEC) and local regulations.
Usage Precautions
- Always verify the system voltage and load current do not exceed the breaker’s 600VAC / 70A ratings.
- Strictly adhere to Lockout/Tagout (LOTO) procedures before installation or maintenance.
- Perform regular mechanical operation tests and contact resistance measurements to ensure long-term reliability.
- Never use the circuit breaker as a routine disconnect switch; use a dedicated isolator for daily switching operations.
