ABB EHW250C2P-1L Welding Isolation Contactor

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1. Product Overview

The ABB EHW250C2P-1L is a high-performance welding isolation contactor designed for industrial welding applications. It provides reliable electrical isolation between welding power sources and loads, ensuring operational safety and preventing electrical faults. This contactor is suitable for AC welding power supplies, welding robots, and automated welding production lines, offering high reliability, long service life, and the ability to withstand high temperatures and frequent operation.

2. Technical Specifications

Electrical Specifications

• Model: EHW250C2P-1L

• Type: Welding Isolation Contactor

• Poles: 2P (Two-pole)

• Rated Current: 250 A

• Rated Operating Voltage: 600 V AC

• Auxiliary Contacts: 1NO + 1NC

• Coil Control Voltage: 110 V AC / 120 V AC (optional)

• Mechanical Life: ≥ 200,000 operations

• Electrical Life: ≥ 100,000 load operations

• Switching Capacity: Supports weld-duty short-circuit and pulse currents

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: 280 mm × 150 mm × 180 mm

• Weight: 10 kg

3. Advantages & Key Features

1. High reliability — Industrial-grade design ensures long-term safe operation.

2. High current capacity — Handles 250 A welding load and pulse currents.

3. Fast response — Electromagnetic actuation suitable for instantaneous welding switches.

4. Easy maintenance — Modular design allows quick disassembly and replacement.

5. High safety — Provides power isolation, compatible with fuses and lockable mechanisms.

6. Industrial adaptability — Reliable operation under high temperature, humidity, and frequent use.

4. Application Areas

• Industrial welding power control and isolation

• Automated welding production lines and welding robot systems

• High-power motor and industrial load control

• Automotive welding operations

• Welding and cutting equipment power management

• Electrical isolation and safety interlock in industrial control cabinets

5. Precautions

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

2. Confirm control coil voltage matches the control system.

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

4. Secure all wiring to prevent loose connections.

5. Disconnect all power before operation or maintenance to prevent electric shock or arc hazards.

6. Regularly inspect contacts, coil status, and wiring tightness to ensure long-term reliable operation.

The structure and details of the product：

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