ABB AF1250-30-22-70 Line Contactor

1. Product Overview

The ABB AF1250‑30‑22‑70 Line Contactor is a high‑capacity industrial AC contactor from the ABB AF series.
This contactor is designed for reliable switching and control of AC motors, power circuits, and large industrial loads. It features robust performance, high durability, and compatibility with auxiliary devices such as overload relays and control systems, making it suitable for heavy industrial applications.

2. Technical Specifications

• Model: AF1250‑30‑22‑70

• Type: Line Contactor / AC Contactor

• Brand: ABB

• Number of Poles: 3

• Rated Operational Current (AC‑3): 1250 A

• Rated Insulation Voltage (Ui): 1000 V

• Rated Impulse Withstand Voltage (Uimp): 8 kV

• Coil Rated Voltage (Uc):

  • AC 220–240 V

  • AC 380–415 V
    (depends on specific coil version)

• Main Contacts: 3 Normally Open (NO)

• Auxiliary Contacts: Optional auxiliary modules available

• Mechanical Life: ≥ 10,000,000 operations

• Electrical Life (AC‑3): ≥ 500,000 operations

• Control Type: AC coil drive

• Mounting: Screw mount or DIN rail with accessory base

• Operating Temperature: ‑25 ℃ to +60 ℃

• Protection Class: IP20 (standard mounting)

• Cooling: Natural or forced ventilation (site dependent)

3. Key Advantages & Features

1. High Load Capacity
   Rated to 1250 A, suitable for high‑power motors and main power circuits.

2. Durable Industrial Design
   Industrial rugged construction for continuous and frequent switching operations.

3. Modular Expandability
   Supports auxiliary contacts and remote control modules for flexible control schemes.

4. Excellent Electrical Performance
   Low contact resistance and effective arc suppression extend service life.

5. Easy System Integration
   Works seamlessly with ABB soft starters, drives, PLCs, and protective relays.

6. Maintenance Friendly
   Standard modular parts allow quick field replacement and minimal downtime.

4. Typical Applications

• Industrial motor starting and power control systems

• Main power switching for production lines

• High‑power fans, pumps, and compressors

• Power distribution systems

• Heavy machinery and mining equipment control

• HVAC and industrial air handling systems

5. Installation & Usage Notes

1. Verify Rated Values
   Ensure rated current, coil voltage, and system requirements match before installation.

2. Proper Wiring
   Use conductor sizes appropriate for rated current and apply secure terminations to prevent loosening.

3. Environmental Considerations
   Install in areas with adequate ventilation and avoid condensation, corrosive gases, and excessive heat.

4. Control & Protection Design
   Combine with overload relays and protective devices to enhance system safety.

5. Reliable Grounding
   Ensure proper grounding of contactor and control enclosure to minimize interference and leakage.

6. Routine Inspection
   Periodically inspect contact wear, coil condition, and terminal tightness for reliable long‑term operation.

The structure and details of the product：

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