Product Overview

The Schneider Electric LC1F400F7 TeSys F Contactor is a high-current industrial switching device designed for controlling three-phase motors and resistive electrical loads. It belongs to the TeSys F contactor family and is intended for demanding industrial power-control applications where reliable switching and electrical isolation are important.

Contactors are widely used in industrial electrical systems to connect and disconnect power circuits through an electrically operated mechanism. Unlike manual switches, they can be controlled remotely by PLC systems, control relays, push buttons, and other automation devices. This makes them essential components in motor starters, production machinery, pumps, compressors, and industrial distribution panels.

The LC1F400F7 features three normally open main power poles and a 400 A AC-3 rated operational current at voltages up to 440 V AC. Its control coil operates at 110 V AC, with a specified control-circuit frequency range of 40–400 Hz.

For motor-control applications, the contactor supports motor ratings of up to 200 kW at 380–400 V AC under AC-3 conditions. It is also suitable for other electrical switching applications when selected according to the appropriate utilization category and electrical ratings.

The contactor is designed for high-capacity switching installations. Its construction supports industrial operating conditions, and its maintenance-friendly design allows access to associated accessories and replacement components according to the manufacturer’s specifications.

The LC1F400F7 has been discontinued, so it is particularly relevant to industrial maintenance, spare-parts procurement, and replacement projects involving existing TeSys F installations.

Technical Specifications

Note: Electrical ratings depend on utilization category, operating voltage, ambient temperature, and installation conditions. Always consult the product documentation before selecting the contactor for a specific application.

Function and Working Principle

The LC1F400F7 uses an electromagnetic operating mechanism to control the connection and disconnection of a high-current electrical circuit.

When the coil receives its specified control voltage, the electromagnetic field operates the contactor mechanism, causing the main contacts to close. This establishes an electrical path through the three power poles and allows current to flow to the connected load.

When the coil is de-energized, the magnetic force is removed and the mechanism returns to its released position. The main contacts open, interrupting the controlled circuit.

1. Electromagnetic Coil Operation

The LC1F400F7 uses a 110 V AC control coil. The coil is separate from the main power circuit and is responsible for operating the contactor mechanism.

A control device such as a PLC output relay, control relay, or push-button circuit can energize the coil through an appropriately designed control circuit.

The specified control-circuit frequency range is 40–400 Hz. The control voltage must remain within the manufacturer’s permitted operating limits to ensure reliable pickup and release.

2. Main Power Contact Switching

The contactor contains three normally open main power contacts. These contacts are used to connect or disconnect the three phases supplying a motor or other electrical load.

Its 400 A AC-3 rating is intended for motor-switching applications under the applicable AC-3 operating conditions. The contactor can also be used for resistive loads when selected according to the appropriate electrical ratings.

3. Motor Starting and Stopping

In a conventional direct-on-line motor starter, the contactor connects the motor directly to the electrical supply. When the control circuit energizes the coil, the main contacts close and the motor starts.

When the control signal is removed, the contacts open and the motor is disconnected from the supply.

The contactor is a switching component rather than a motor-speed controller. Applications requiring variable-speed operation normally use a variable frequency drive or another suitable motor-control solution.

4. Electrical Switching and Arc Management

Opening a high-current electrical circuit can produce an electrical arc between separating contacts. Industrial contactors are designed with contact structures and arc-management arrangements appropriate to their intended switching duties.

Correct selection is important because the electrical stress experienced during motor starting and stopping differs from that of resistive-load switching.

The LC1F400F7 should be applied within its specified voltage, current, utilization category, and operating-frequency limits.

Role in Industrial Control Systems

The Schneider Electric LC1F400F7 is commonly used as part of a larger motor-control or power-distribution arrangement. It provides the switching function between the power supply and the controlled load, while other control devices determine when the contactor operates.

PLC-Based Motor Control

A PLC can control the contactor through a suitable output relay or interface circuit. The PLC program can energize the coil according to machine conditions, safety interlocks, operating sequences, or operator commands.

For example, a PLC-controlled pump system may energize the contactor when the process requires additional pumping capacity and release it when the required operating condition has been reached.

The PLC output must be designed to handle the contactor coil circuit appropriately. The main motor current must never be routed through an ordinary PLC output.

Motor Starter Systems

The LC1F400F7 can be used in motor starter arrangements where a high-capacity contactor is required. A complete motor starter may also include circuit protection, overload protection, isolation devices, and control components.

The contactor performs the switching function, while protective devices provide additional protection against electrical faults and abnormal motor operating conditions.

Electrical Distribution Panels

Industrial electrical panels use contactors to control power distribution to selected equipment. The LC1F400F7 can be incorporated into systems where high-current loads need to be switched through a remote control circuit.

Panel designers must account for conductor sizing, terminal connections, electrical clearances, heat dissipation, and the manufacturer’s installation requirements.

Automated Production Equipment

In automated production lines, contactors provide a way to control the electrical supply to motors and other equipment. They can be coordinated with PLC logic, sensors, operator interfaces, and protective devices.

This arrangement allows machinery to operate according to programmed sequences and process requirements.

Industrial Applications

The LC1F400F7 is designed for high-current industrial switching applications. Its 400 A AC-3 rating makes it relevant to larger motor-control installations where the electrical and mechanical requirements match the contactor’s specifications.

1. Industrial Pumping Systems

Large industrial pumps are used in water treatment, manufacturing, chemical processing, and utility installations.

The LC1F400F7 can serve as the motor-switching component in an appropriately designed starter circuit. It allows a control system to start and stop the pump motor through the contactor’s electromagnetic coil.

Pump starting current, motor power, operating frequency, and protective-device coordination must be evaluated during selection.

2. Air Compressor Systems

Industrial air compressors often use large motors to drive compression equipment. Contactors are used in motor starter circuits to control the electrical supply.

The LC1F400F7 may be suitable for compressor installations where its rated current, motor power, and switching category meet the application requirements.

Compressor systems also require appropriate overload protection, pressure controls, and safety interlocks.

3. Industrial Fans and Ventilation Equipment

Large ventilation systems and industrial fans require dependable electrical switching for motor operation.

A contactor can receive commands from a PLC, temperature controller, pressure switch, or building management system. The control arrangement can start and stop fans according to environmental or process requirements.

4. Manufacturing Machinery

Large production machines may use high-power motors to drive mechanical equipment, hydraulic systems, and material-processing mechanisms.

The LC1F400F7 can be used in suitable motor-control circuits to provide electrically operated switching under the required operating conditions.

5. Water Treatment Facilities

Water treatment plants operate pumps, mixers, blowers, and other motor-driven equipment. Contactors are important components in their electrical control panels.

The LC1F400F7 may be used in appropriate high-current motor circuits where the electrical ratings and control requirements are satisfied.

6. Industrial Power-Control Systems

Industrial facilities may require contactors to control high-current resistive loads or other electrical equipment.

The contactor must be selected according to the load type and utilization category. The AC-3 motor rating should not automatically be applied to every type of electrical load.

Installation and System Integration

Correct installation is essential for safe switching performance and long-term reliability.

1. Verify the Control Coil Voltage

The LC1F400F7 uses a 110 V AC control coil. Before installation, verify that the control circuit provides the correct voltage and frequency.

Do not substitute a contactor with a different coil voltage without checking the control transformer, PLC interface, and wiring arrangement.

2. Confirm Main Circuit Ratings

Check the motor nameplate and application requirements before connecting the main power circuit.

The contactor’s 400 A AC-3 rating applies under specified operating conditions. Engineers should consider motor power, voltage, starting frequency, ambient temperature, and switching duty.

3. Mounting and Panel Space

The supplied dimensions are 206 × 213 × 219 mm, and the listed weight is 9.1 kg.

Provide adequate mechanical support and sufficient clearance around the contactor. The mounting arrangement must accommodate power cables, control wiring, terminal access, and maintenance requirements.

4. Power Wiring

Use conductors and connection hardware suitable for the expected current and installation conditions.

The main power terminals must be tightened according to the manufacturer’s specified torque. Loose connections can cause overheating, increased contact resistance, and equipment damage.

5. Control Circuit Wiring

The coil circuit should be wired separately from the main power circuit where required by the panel design.

PLC outputs and control relays must be appropriately rated or interfaced to operate the 110 V AC coil safely. Provide suitable control-circuit protection.

6. Protective Device Coordination

The contactor does not replace a circuit breaker, fuse, or motor overload protection device.

The protective-device selection must account for the motor’s operating current, starting characteristics, prospective short-circuit current, and applicable electrical standards.

7. Commissioning and Testing

Before commissioning, inspect the contactor body, terminals, mounting, and wiring.

Verify that the coil operates correctly and that the main contacts open and close as expected. Check the control interlocks and confirm that the motor starts and stops in accordance with the control sequence.

All commissioning work should be carried out by qualified electrical personnel using appropriate safety procedures.

Compatible System Components

The LC1F400F7 is normally installed with other motor-control and electrical protection components.

These components are examples of equipment that may be used in a complete installation. They are not necessarily included with the LC1F400F7.

Alternative Models and Replacement Considerations

The LC1F400F7 has been discontinued. Schneider Electric identifies several TeSys Giga models as potential replacements.

A replacement must not be selected by current rating alone. Compare:

• Number of poles and main contact arrangement.
• AC-3 and other applicable utilization-category ratings.
• Rated operational voltage and motor power.
• Coil voltage and control-circuit frequency.
• Physical dimensions and mounting arrangement.
• Terminal design and conductor requirements.
• Auxiliary contact configuration.
• Short-circuit coordination and protective devices.
• PLC interface and control wiring.
• Required accessories and maintenance procedures.

The TeSys Giga alternatives are not automatically mechanical or electrical drop-in replacements. Engineering review may be required before installation.

Key Advantages

High-Current Switching Capability

The 400 A AC-3 rating makes the LC1F400F7 suitable for specified high-current motor-control applications.

Three-Pole Main Contact Design

Its three normally open main contacts provide switching for three-phase electrical circuits.

110 V AC Control Coil

The separate control circuit allows the contactor to be operated remotely through appropriately designed industrial control systems.

Industrial Motor-Control Applications

The contactor is designed for demanding motor-switching applications, including suitable large pumps, compressors, fans, and production machinery.

High Mechanical Durability

The published mechanical durability of 10 million cycles supports its use in industrial installations when operated within the specified conditions.

Maintenance-Friendly Design

The TeSys F family supports associated accessories and maintenance components, allowing servicing to be planned around the requirements of the installation.

Established Industrial Equipment

The LC1F400F7 is an identifiable TeSys F spare part for existing industrial installations, making accurate model verification important in maintenance and replacement projects.

Technical FAQs

1. What is the Schneider Electric LC1F400F7?

The LC1F400F7 is a TeSys F three-pole AC contactor designed for industrial motor control and resistive-load switching applications.

2. What is the rated current of the LC1F400F7?

Its AC-3 rated operational current is 400 A at the specified operating voltage. Its conventional free-air thermal current is 500 A at or below 40°C. These ratings describe different operating conditions and should not be treated as interchangeable.

3. What is the coil voltage?

The LC1F400F7 uses a 110 V AC coil, with a specified control-circuit frequency range of 40–400 Hz.

4. How many poles does this contactor have?

It has three main poles, with three normally open main contacts.

5. What motor power can it control?

The published AC-3 motor rating is 200 kW at 380–400 V AC and 220 kW at 415 V AC. Actual application suitability depends on the motor and operating conditions.

6. Can it be controlled by a PLC?

Yes. A PLC can control the contactor through a suitable output interface or relay circuit designed for its 110 V AC coil. The PLC output must not directly carry the motor’s main power current.

7. Is the LC1F400F7 still available as a current-production model?

No. Schneider Electric lists the product as discontinued on December 30, 2024. Existing stock and aftermarket availability may vary.

8. Which models are potential replacements?

Schneider Electric identifies LC1G400EHEA, LC1G400KUEN, and LC1G400EHEN from the TeSys Giga family as potential replacements. Verify coil voltage, mounting, terminal arrangement, and application ratings before substitution.

9. What should be checked when purchasing this contactor?

Confirm the complete catalog number, nameplate information, coil voltage, main contact condition, terminal condition, accessories, and product condition. For used equipment, request clear photographs and suitable functional test information.

10. What is the difference between AC-3 and AC-1 ratings?

AC-3 is a utilization category associated with starting squirrel-cage motors and switching them off while running. AC-1 generally covers non-inductive or slightly inductive loads, such as resistive heating loads. The applicable rating depends on the load and switching conditions.

Procurement and Maintenance Recommendations

When sourcing the Schneider Electric LC1F400F7, verify the complete catalog number and ensure that the coil voltage is 110 V AC. The coil voltage is particularly important because visually similar TeSys F contactors may use different control voltages.

For discontinued equipment, request clear photographs of the product label, power terminals, coil terminals, and overall housing. Confirm whether the contactor is new, unused surplus, refurbished, or previously installed. Also establish whether auxiliary contacts and other accessories are included.

During maintenance, inspect the main contacts for signs of excessive wear, pitting, discoloration, or overheating. Check the coil circuit, terminal tightness, mechanical movement, and mounting condition according to the manufacturer’s maintenance instructions.

Contactors used in high-current motor circuits should be maintained by qualified personnel. Always isolate the power supply and verify the absence of hazardous voltage before inspection or servicing.

For replacement projects, compare the original LC1F400F7 with the proposed TeSys Giga alternative. Check electrical ratings, coil voltage, control wiring, mechanical dimensions, terminal arrangements, and protective-device coordination before approving the replacement.

Conclusion

The Schneider Electric LC1F400F7 TeSys F Contactor is a three-pole, 400 A industrial contactor designed for high-current motor-control and resistive-load switching applications. It features a 110 V AC control coil and supports motor applications up to 200 kW at 380–400 V AC under AC-3 conditions.

Its high-current switching capability and industrial construction make it relevant to large motor-control systems, including pumps, compressors, fans, and manufacturing machinery.

Although the LC1F400F7 has been discontinued, it remains an important spare part for existing TeSys F installations. Accurate catalog-number identification and careful evaluation of electrical and mechanical compatibility are essential when purchasing or selecting a replacement.