The GE CK11CE300 is a heavy-duty AC-3 rated contactor from GE’s CK11 series, designed for motor control and power switching in demanding industrial environments. As a Class 8510 Type S contactor, this 3-pole device combines 300A breaking capacity with IEC 60947-4-1 compliance, making it ideal for controlling 11kW-75kW induction motors in continuous operation. The CK11CE300 features silver-nickel alloy main contacts with arc chutes, achieving 1 million mechanical operations in steel mill applications.
Part of GE’s C-Kontrol motor management platform, this contactor supports direct mounting on 35mm DIN rails with integrated mechanical interlock provisions. Its coil voltage range (24-400VAC/DC) enables universal compatibility with PLC outputs from Allen-Bradley ControlLogix or Siemens S7-1500 systems. The GE CK11CE300 incorporates built-in surge suppression for reliable operation in mining applications with frequent voltage transients up to 6kV.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | CK11CE300 |
| Manufacturer | GE |
| Product Type | 3-Pole Motor Contactor |
| Rated Operational Current (Ie) | 75A AC-3 (400VAC) |
| Breaking Capacity | 300A @ 690VAC |
| Coil Voltage | 24-400VAC/DC ±10% |
| Contact Material | AgNi + Arc Runner |
| Mechanical Life | 1,000,000 cycles |
| Electrical Life | 100,000 cycles (AC-3) |
| Mounting | DIN Rail (35mm) or Panel |
| Terminal Type | Screw Clamp (50mm² max) |
| Operating Temp | -25°C to +60°C |
| Protection Class | IP20 (Terminals) / IP65 (Front) |
| Certifications | UL 508, CE, cURus |
Key Features and Advantages:
Robust arc control: The CK11CE300’s magnetic blowout system reduces arc duration to <15ms during 415VAC motor disconnection, protecting VFD inputs in HVAC compressor systems. Its double-break contact design maintains stable contact resistance below 50μΩ after 50,000 operations.
Energy efficiency: Low holding power consumption (8VA) combined with 95% recycled material construction meets ISO 14001 environmental standards. The contactor’s DC coil option enables 24VDC control from safety relays like AB 700-HA32Z24, reducing cabinet heat generation.
Maintenance-friendly design: Transparent arc chamber covers allow visual inspection without disassembly in food processing plants. Reversible auxiliary contacts (1NO+1NC) simplify retrofit installations in legacy GE CR306 contactor panels.
Application Areas:
The GE CK11CE300 excels in:
- Material Handling: Controlling 55kW conveyor belt motors in distribution centers
- Water Treatment: Switching 45kW booster pumps with 250 starts/hour duty cycle
- Renewable Energy: Managing pitch control motors in 3MW wind turbines
- OEM Machinery: Integrating with CNC equipment motor starters
In cement plant baghouse systems, this contactor handles 60A continuous current with 50°C ambient cooling. Oil refineries utilize its vibration-resistant design (10-150Hz, 1.5g) for crude oil pump control panels. The silver-nickel contacts prevent welding during motor stalling conditions in plastic extruders.
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Installation and Maintenance:
Installation preparation: Verify DIN rail mounting clearance (70mm depth required) before installing CK11CE300. Use copper conductors with 60/75°C rating for main power connections in foundry applications.
Maintenance recommendations: Clean contact surfaces every 25,000 operations using GE-approved contact cleaner in pharmaceutical cleanrooms. Check coil voltage monthly with ±5% tolerance using True RMS multimeters. Replace arc chutes when visible erosion exceeds 3mm in steel stamping press controls.
Product Assurance:
HONG KONG SAUL ELECTRICAL LIMITED guarantees 12-month performance warranty for CK11CE300 contactors, including free technical support for cross-brand compatibility issues. All units undergo 100% contact resistance testing (<100μΩ) and 500-cycle operational validation before shipment. Our service network provides 48-hour emergency replacement for critical failure cases in semiconductor fabs. Each contactor includes complete IEC 60947 test reports and RoHS 3.0 compliance certificates.
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