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ABB 1SFL427002R1311 Three-Phase Contactor

1. Product Overview

The ABB 1SFL427002R1311 is an industrial-grade three-phase contactor designed for low-voltage power control systems. It enables on/off switching of three-phase AC loads (e.g., motors, heaters, pumps) and integrates with control circuits (PLCs, relays) for automated operation. With robust arc suppression and high mechanical/electrical durability, it suits harsh industrial environments like manufacturing, HVAC, and power distribution.

2. Technical Specifications

2.1 Electrical Performance

Rated Voltage (Main Circuit): 400 V AC (3-phase, 50/60 Hz); compatible with low-voltage industrial grids

Rated Current (Ie): 32 A (continuous at 40°C; derates 1% per °C above 40°C up to 60°C)

Making/Breaking Capacity: 6×Ie (making); 4×Ie (breaking) at rated voltage (resistive load)

Control Voltage (Coil): 24 V DC / 230 V AC (selectable via model variant; 50/60 Hz for AC coil)

Coil Power Consumption: 12 VA (inrush); 2 VA (holding) for AC coil; 5 W (inrush); 1 W (holding) for DC coil

2.2 Mechanical & Arc Suppression

Contact Configuration: 3 normally open (NO) main contacts; 1 normally open (NO) auxiliary contact (for status feedback)

Contact Material: Silver-tin oxide (AgSnO₂) (high anti-arc erosion; low contact resistance)

Arc Suppression: Built-in arc chute (ceramic material) to extinguish arcs quickly; reduces contact wear

Mechanical Life: ≥10 million operations; Electrical Life: ≥100,000 operations (at rated load)

2.3 Environmental & Mounting

Operating Temperature: -25°C ~ +60°C (suitable for control cabinets and industrial sites)

Storage Temperature: -40°C ~ +85°C

Protection Degree: IP20 (against finger touch and large dust; for indoor cabinet mounting)

Mounting: DIN rail (EN 50022 standard) or panel mounting (via integrated screw holes); weight ~450 g

3. Application Fields

Motor Control: Starts/stops 3-phase induction motors (e.g., conveyor motors, pump motors) in manufacturing plants

HVAC Systems: Controls 3-phase heaters, fans, and compressors in commercial buildings’ heating/cooling systems

Power Distribution: Switches three-phase loads in industrial power panels (e.g., electric furnaces, welding machines)

Process Automation: Integrates with PLCs to switch three-phase pumps in water treatment plants and chemical process lines

4. Installation & Maintenance

4.1 Installation

Mount on EN 50022 DIN rail (35 mm width) or panel (use M4 screws, torque 0.8-1.0 N·m); ensure 10 mm clearance around for heat dissipation

Connect 3-phase main lines to L1/L2/L3 (input) and T1/T2/T3 (output) terminals; use 6-10 mm² copper cables (matches 32 A current)

Wire control circuit (PLC output/relay contact) to coil terminals (A1/A2); verify coil voltage matches power supply to avoid burnout

4.2 Maintenance

Check main contacts quarterly (inspect for discoloration or pitting; replace if contact resistance >100 mΩ)

Clean auxiliary contact terminals with a dry brush (remove dust to prevent poor status feedback)

Test coil voltage and current periodically (ensure no overvoltage; AC coil hum indicates potential fault)

Replace the contactor if main contacts stick, coil burns out, or auxiliary contacts fail (avoid repairing internal components—voids warranty)

The structure and details of the product：

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