GE CK11CE300 Three-phase High-power AC Contactor

GE CK11CE300 Three-phase High-power AC Contactor (CK-E Electronic Coil Series)
I. Basic Overview
Brand: GE General Electric (Low-voltage Industrial Control for General Electric, now part of ABB’s Low-voltage Business)
Series: CK11CE High-power Contactor (CE = Built-in Electronic Wide-voltage Coil Module)
Origin: Polish Original Production
Application: Industrial Low-voltage High-power Load Switching, Power Plants, Oil and Gas, Metallurgy, HVAC High-power Motors, Heaters, Capacitor Cabinets Main Circuit Control, Common Spare Parts for Mark VIe Generator System Auxiliary Circuits

Core Rated Electrical Parameters
1. Main Circuit (3-pole three-phase normally open 3NO)
Rated current of AC-3 motor load: 300A (400V condition)
Maximum insulation voltage: AC 690V
Applicable motor power:
380V: Approximately 160kW three-phase asynchronous motor
400V: Maximum 185kW
Agreed heating current Ith: 450A (resistive load AC-1 long-term full load)
Short-term tolerance: Capable of withstanding 700A peak impulse current
2. Winding (CE electronic winding with maximum highlights)
Different from traditional electromagnetic windings, electronic constant voltage wide-range winding:
One set of windings compatible: 24V~500V AC/DC universal (50/60Hz)
Extremely resistant to voltage fluctuations: Even when voltage drops and voltage drop – 30% still reliable to engage, significant advantages in power plant grid fluctuation scenarios
Lower power consumption, low engagement noise, less likely to burn the winding, significantly increased lifespan
3. Standard Auxiliary Contacts
Standardly equipped: 1 normally open + 1 normally closed (1NO + 1NC)
Used for PLC feedback, operation status interlock, fault alarm circuits; can be externally connected to expand more auxiliary contact modules
III. Life and Operating Condition Performance
Mechanical life: ≥10 million times
Electrical life (AC-3 300A): ≥600,000 times
Rated operating frequency: 1200 times/hour, suitable for frequent start-stop scenarios of fans and pumps
Operation mode: S1 continuous long-term operation, S3 intermittent cyclic operation mode applicable

Structure, Size and Environment
Connection method: Front panel bolt connection, compatible with copper bus hard connection
Protection level: IP20 (installed in the cabinet)
Operating environment temperature: -40℃ ~ +70℃, wide temperature compatible with power plants, outdoor cabinets
Dimensions: Approximately 285×135×220mm, net weight of the entire machine ≈13kg
Certifications: UL, CE, CCC, IEC60947 international low-voltage electrical standards

 Core Advantages of CE Electronic Winding Series
Winding universality: Full coverage of 4 winding specifications from 24V to 500V for all AC/DC control voltages, extremely simple spare parts inventory
Strong grid adaptability: No jitter or release in voltage drop, harmonics, interference conditions
Built-in surge absorption, no need for additional voltage-sensitive resistors to protect the winding
AC/DC dual use, replaceable with traditional AC/DC different windings of old contactors

ypical Application Scenarios
GE gas turbine / steam turbine Mark VIe control system: Lubricating oil pump, cooling fan, hydraulic oil pump for high-power motor start-stop control
Power plant auxiliary equipment circulating water pump, induced draft fan, supply fan main circuit switch
Oil and gas station compressors, high-power electric heaters, reactive power compensation capacitor cabinet switching
Metallurgical rolling mills, large-scale HVAC central machine drive control