Previous
Next
CKJ5 6.6kV Vacuum Contactor | 80A–160A Series
The CKJ5 series 6.6kV vacuum contactor is a high-performance switching device designed for controlling AC motors, transformers, and capacitor banks in medium-voltage power systems. Rated for 6.6kV, it supports current levels from 80A to 160A, making it ideal for industrial automation, mining systems, and substation applications.
🔧 Product Overview
CKJ5 vacuum contactors use a sealed vacuum interrupter to perform arc-free switching, ensuring long electrical life and minimal maintenance. The unit integrates an electromagnetic operating mechanism, auxiliary contacts, and over-voltage protection. It is suitable for use in fixed installations or withdrawable panels.
Key Features:
Rated voltage: 6.6kV, frequency: 50Hz
Reliable vacuum arc-quenching chamber
Optional operating current: 80A / 125A / 160A
High mechanical and electrical endurance
Compact modular design, easy to install and maintain
Suitable for frequent operation and remote control
📐 Technical Specifications
| Parameter | CKJ5-80A | CKJ5-125A | CKJ5-160A |
|---|---|---|---|
| Rated Voltage | 6.6kV | 6.6kV | 6.6kV |
| Rated Frequency | 50Hz | 50Hz | 50Hz |
| Rated Current | 80A | 125A | 160A |
| Rated Making Capacity | 800A | 1250A | 1600A |
| Rated Breaking Capacity | 640A | 1000A | 1280A |
| Short-Time Withstand Current (1s) | 4kA | 5kA | 6.3kA |
| Mechanical Life | ≥1,000,000 ops | ≥1,000,000 ops | ≥1,000,000 ops |
| Electrical Life (AC-3) | ≥100,000 ops | ≥100,000 ops | ≥100,000 ops |
| Operating Method | Electromagnetic Coil | ||
| Control Voltage | AC/DC 110V/220V | AC/DC 110V/220V | AC/DC 110V/220V |
✅ Compliance & Standards
IEC 60947-4-1: Contactors and motor starters
GB/T 14048.4: Chinese standard for low-voltage switching devices
DL/T 402-91: Electric contactor general requirements
ISO 9001: Manufacturing quality system
CE Certification available upon request
🧰 Typical Applications
6.6kV asynchronous motor control
Automatic switching in mining and metallurgical systems
Capacitor switching and transformer protection
Medium-voltage power cabinets (KYN, XGN type)
Intelligent substations and distribution automation
📊 Real Project Case: Iron Ore Plant, Peru (2022)
In 2022, an iron ore processing facility in Arequipa, Peru upgraded its 6.6kV MCC panels with 42 units of CKJ5-125A vacuum contactors. These devices controlled large induction motors used in belt conveyors and crushers.
Result:
Achieved over 200,000 electrical operations in 18 months
No arc flash incidents reported
Improved motor switching response by 30%
Source: Client operation report, Ingetec SA, Peru, 2023
🛠 Installation Tips
Ensure coil voltage matches the control system (AC/DC 110V or 220V)
Mount vertically in well-ventilated, dust-free enclosures
Pre-check the insulation resistance of terminals before energizing
Clean contact surfaces every 6–12 months
Allow for arc dissipation clearance in panel design
❓ Frequently Asked Questions (FAQ)
1. What’s the difference between CKJ5 and CJ20 contactors?
CKJ5 is a vacuum type for medium-voltage (3.3–10kV), while CJ20 is electromagnetic and used for low-voltage (≤660V) circuits.
2. Can this contactor be used in a withdrawable drawer?
Yes, CKJ5 models are compatible with drawer-type panels, provided the correct rail dimensions and wiring layout.
3. How is the CKJ5 contactor protected against overvoltage?
It can be equipped with zinc oxide varistors or RC snubber units for surge suppression.
4. What motor ratings are suitable for 80A vs 160A?
80A: up to ~132kW motor
125A: up to ~200kW motor
160A: up to ~250kW motor (depending on startup method)
5. Can you provide GOST or EAC certification for CIS market?
Yes, optional GOST/EAC documentation is available upon request.
📞 Contact Our Engineer for a Custom Quote or Drawing
We provide custom assembly, control circuit integration, and OEM solutions for MV panels.
Engineer: Thor
Company: Wei Shoe Elec
Phone: +86-0577-62788197
WhatsApp: +86 159 5777 0984
Email: [email protected]
