Why Choose the LOVATO Electric 11B310400220 Four-Pole Contactor?
The LOVATO Electric 11B310400220 is a heavy-duty four-pole industrial power contactor designed for reliable switching of high-current electrical loads. As part of the robust LOVATO B310 contactor series, it provides a conventional free-air thermal current rating of 450 A in AC-1 duty, making it suitable for demanding power distribution, heating, lighting and industrial automation applications.
This contactor features a versatile 220–240 V AC/DC control coil, allowing operation with compatible alternating-current or direct-current control supplies. Its four-pole design enables four conductors to be switched simultaneously, making it particularly useful in three-phase systems where neutral switching or additional circuit isolation is required.
With a rated operational current of 320 A in AC-3 duty and a motor rating of up to 170 kW at 400 V, the 11B310400220 is suitable for high-power motors as well as resistive and slightly inductive loads. Its screw-mounted construction, high insulation rating and compliance with international standards support dependable use in industrial control panels and switchboards.
Key Advantages
- Heavy-duty four-pole contactor for industrial power switching.
- 450 A IEC thermal current rating in AC-1 duty.
- 320 A operational current rating in AC-3 duty.
- 220–240 V AC/DC control coil for flexible integration.
- Suitable for motors up to 170 kW at 400 V AC-3.
- Four-pole configuration supports neutral and multipole circuit switching.
Key Features
- LOVATO Electric B310 power contactor series.
- Four main normally open power poles.
- 450 A conventional free-air thermal current.
- 320 A AC-3 operational current at up to 440 V.
- 220–240 V AC/DC control coil.
- 170 kW motor rating at 400 V AC-3.
- Mechanical life of up to 10 million operations.
- Screw mounting for secure industrial installation.
Reliable Four-Pole Power Switching
Four-pole contactors use a low-power electrical control signal to switch four high-current conductors simultaneously. When the control coil is energised, all four main contacts close together, enabling remote operation through PLCs, relays, timers, pushbuttons and automated control systems.
The LOVATO Electric 11B310400220 is particularly suitable for AC-1 applications involving resistive or slightly inductive loads, including industrial heaters, lighting circuits and power distribution equipment. Its AC-3 rating also supports the switching of large three-phase motors in demanding machinery and automation systems.
Typical Applications
- Industrial heating and resistive load control.
- Four-wire three-phase electrical systems.
- Neutral conductor switching.
- Large three-phase motor starters.
- Industrial lighting installations.
- Power distribution and transfer panels.
- Motor control centres and switchboards.
- Heavy-duty OEM machinery and automation systems.
