ABB EH-450 Magnetic Contactor

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1. Product Overview

The ABB EH-450 is an industrial-grade AC magnetic contactor used for remote and automated control of motors, circuits, and industrial equipment. It features advanced electromagnetic control technology, high reliability, long service life, and excellent safety performance. The EH-450 is widely used for motor starting, lighting control, high-power load switching, and industrial automation systems.

2. Technical Specifications

Electrical Specifications

• Model: EH-450

• Type: AC Magnetic Contactor

• Rated Voltage: 690 V AC

• Rated Current: 450 A

• Poles: 3P (Three-pole)

• Coil Control Voltage: 110 V / 220 V AC (optional)

• Switching Capacity: 160 kW (400 V AC3)

• Mechanical Life: ≥ 1,000,000 operations

• Electrical Life: ≥ 300,000 load operations

• Auxiliary Contacts: Optional 1NO+1NC or 2NO+2NC

• Protection Features: Overload and short-circuit protection (with fuses)

Environmental & Installation

• Operating Temperature: –25°C … +60°C

• Storage Temperature: –40°C … +70°C

• Protection Degree: IP20

• Mounting: Panel or bracket installation

• Wiring: Bolted main power terminals; screw terminals for auxiliary contacts and coil

• Approximate Dimensions: 320 mm × 180 mm × 220 mm

• Weight: 18 kg

3. Advantages & Key Features

1. High reliability — Industrial-grade design ensures long life and stable operation.

2. High current capacity — Handles 450 A high-power loads and motor start inrush currents.

3. Fast response — Electromagnetic actuation suitable for frequent industrial switching.

4. Easy maintenance — Modular structure for easy disassembly and replacement.

5. High safety — Supports auxiliary contacts and fuse protection for enhanced safety.

6. Industrial adaptability — Reliable operation in high temperature, humidity, and vibration environments.

4. Application Areas

• High-power motor starting and control systems

• Industrial automation production lines

• Power distribution and load switching

• Large fans, pumps, compressors, and industrial equipment

• Factory lighting and power distribution

• Electrical isolation and safety interlock in control cabinets

5. Precautions

1. Verify power supply voltage and load match the contactor specifications before installation.

2. Ensure all wiring is secure to prevent loose connections.

3. Install in a dry, well-ventilated environment, avoiding dust, moisture, and corrosive gases.

4. Operate within rated current and switching capacity, using fuses for protection.

5. Regularly inspect contacts, coil, and wiring for wear.

6. Disconnect all power before maintenance or disassembly to prevent electric shock and arc hazards.

The structure and details of the product：

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