Description
GE CR305F-004
Technical Specifications
- Manufacturer: General Electric (GE)
- Series: CR305 Definite Purpose Contactor
- Poles: Multi-pole configuration (typically 3-pole for motor control)
- Coil Voltage: Specific control voltage (e.g., 120VAC or 24VDC, depending on exact suffix)
Functional Features
- High Current Switching: Capable of handling high inrush and continuous operating currents.
- Electrical Isolation: Provides safe galvanic isolation between the control circuit and the power circuit.
- Auxiliary Contacts: Supports add-on auxiliary contact blocks for control logic feedback.
Application Scenarios
Motor control centers (MCCs), HVAC systems, industrial heating equipment, and commercial power distribution panels.
Performance Parameters
- Mechanical Life: Rated for millions of mechanical operations.
- Electrical Life: Rated for hundreds of thousands of full-load switching operations.
Material Composition
Housed in a durable thermoset plastic enclosure with silver-alloy main contacts and copper coils.
Structural Characteristics
Compact, panel-mountable design with clearly marked line and load terminals, coil terminals, and grounding points.
Working Principle
When the control coil is energized, it generates a magnetic field that pulls the movable armature, closing the main power contacts and allowing current to flow to the load. When de-energized, spring tension opens the contacts.
Installation Requirements
Mount vertically on a flat, solid surface. Use appropriately sized copper conductors and torque all terminal screws to the manufacturer’s specified values.
Usage Precautions
Ensure the contactor’s voltage and current ratings exceed the connected load. Provide short-circuit protection (fuses or breakers) upstream. Do not use for emergency stop functions unless specifically rated for safety applications.
