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GE CR463MD0NJA10A Large Electromagnetic Contactor
GE CR463MD0NJA10A
GE CR463MD0NJA10A is a large electromagnetic contactor produced by General Electric (GE), mainly used to control high-power motors and large electrical loads. This model belongs to GE’s Heavy Duty Contactors series and is commonly found in industrial electrical distribution cabinets.
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The following is a detailed introduction to the product:
1. Overview and Main Functions
- Product Positioning: Belongs to GE’s Heavy Duty Contactors series (Model CR463), designed specifically for heavy-duty loads such as high-power motors, water pumps, and compressors.
- Core Functions: Used to connect or disconnect the main power circuit in the control circuit, capable of withstanding high current impacts and protecting the safe operation of motors and circuits.
- Applicable Standards: Complies with IEC 60947-4-1 standard, providing reliable electrical isolation and control functions.
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2. Key Technical Parameters
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Parameter
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Specification/Description
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|---|---|
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Rated Voltage
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277 VAC
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Rated Current
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30A
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Number of Phases
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3 Phases
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Number of Poles
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2 Poles
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Model Suffix Meaning
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NJA10A indicates a specific contact configuration and additional functions, usually related to contact capacity or specific characteristics of auxiliary contacts.
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Protection Class
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NEMA 1 (for indoor use)
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3. Product Features
- High Durability: Adopts high-quality coil and contact materials, resistant to high temperature and corrosion, with a long service life.
- Strong Impact Resistance: Capable of withstanding large current impacts generated during motor startup.
- High Reliability: Sturdy structure and stable contact pressure ensure low-resistance contact.
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4. Structure and Composition
- Main Contacts: Responsible for connecting or disconnecting the main circuit.
- Auxiliary Contacts: Provide additional signal feedback functions (such as normally open and normally closed contacts).
- Coil: Generates a magnetic field to drive contact action when energized.
- Enclosure: The metal enclosure protects internal components, usually NEMA 1 class, suitable for indoor use.
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5. Application Fields
- Industrial Power Distribution: Used to control heavy-duty equipment such as large motors, transformers, and water pumps.
- Power System: Serves as the core circuit breaking component in distribution cabinets.
- Automation Control: Acts as an executive component in PLC control systems.
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6. Installation and Maintenance
- Installation: Usually installed in distribution cabinets and fixed with bolts. When wiring, pay attention to distinguishing the terminals of main contacts and auxiliary contacts.
- Maintenance: Regularly check the contact wear, clean dust, and inspect the coil insulation resistance to ensure the reliable operation of the contactor.
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