Schneider Electric LC1D150 Contactor

The LC1D150 Contactor from Schneider Electric is a high-performance product specifically designed for industrial motor control and power distribution. It belongs to the TeSys D series and is suitable for motor control scenarios under the AC-3 service category. Below is a detailed analysis of its core parameters and key application points:

1. Core Electrical Parameters
2. Rated Current and Power

Rated Current of Main Contacts: 150A (under AC-3 service category it can control a 75kW motor at 380V).

Applicable Motor Power:

– Up to 100HP (approximately 75kW) at 480V;

– Supports 125HP (approximately 93kW) at 600V.

Conventional Heating Current: 200A (capability for long-term stable operation).

2. Coil Voltage and Frequency

AC Coil: Supports 24VAC 48VAC 110VAC 220VAC 380VAC etc. with a frequency of 50/60Hz (the suffix code such as “M7” indicates 220VAC/50-60Hz).

DC Coil: Some models (e.g. LC1D150BD) support 24VDC.

Voltage Fluctuation Range: The coil can still operate stably when the voltage fluctuates within 70%-120% of the rated value.

3. Breaking Capacity and Short-Circuit Withstand

Ultimate Breaking Capacity (Icu): 100kA (when used with Class J or Class CC fuses).

Short-Circuit Current Rating (SCCR):

– 100kA (when combined with specific fuses such as Littelfuse Class L);

– Some data shows 141kA which may vary depending on test conditions or fuse types.

1. Mechanical and Structural Design
2. Contact Configuration

Main Contacts: 3-pole normally open (3NO) made of silver alloy with strong arc resistance.

Auxiliary Contacts:

Standard Configuration: 1NO + 1NC (can be expanded to 3NO + 1NC or more);

Expansion Method: Auxiliary contact modules (e.g. LA9 series) can be installed on the top or left side to support flexible combination.

2. Installation Methods

DIN Rail Mounting: Compatible with 35mm standard DIN rails (models with 115-170A require a dedicated DIN rail).

Screw Mounting: Equipped with 4 M6 mounting holes which can be directly fixed to panels or cabinets.

3. Protection and Environmental Adaptability

Protection Class: IP20 (touch-proof suitable for use inside control cabinets).

Ambient Temperature: -5℃ to +40℃ (24-hour average ≤ +35℃); some models can be expanded to -10℃ to +70℃.

Altitude Limit: ≤ 2000 meters.

Pollution Degree: Degree 3 (suitable for general industrial environments).

III. Functional Features and Certifications

1. Safety and Reliability

Arc Extinguishing Technology: Adopts magnetic blow-out arc extinguishing and grid arc extinguishing technologies to quickly extinguish arcs and extend contact service life.

Surge Suppression: Some models have a built-in bidirectional diode suppressor to protect the coil from voltage spike impacts.

Mechanical Life: Up to 10 million cycles (no-load operation).

Electrical Life: Approximately 600000 cycles under AC-3 category.

2. Certifications and Compliance

International Standards: Complies with certifications such as IEC 60947-4-1 UL 508 and CSA C22.2 No.14.

Environmental Requirements: RoHS/REACH compliant and meets the Green Premium standard.

1. Appliction Scenarios and Selection Recommendations
2. Typical Applications

Motor Control: Start-stop and forward-reverse control of three-phase asynchronous motors such as fans water pumps and compressors.

Power Distribution: Load switching and circuit protection in industrial power distribution systems.

Special Environments: Combined with thermal overload relays (e.g. LRD series) to form magnetic starters providing overload protection.

2. Key Selection Points

Coil Voltage Matching: Select the corresponding model according to the control circuit voltage (e.g. LC1D150M7 is 220VAC).

Auxiliary Contact Requirements: For complex control logic additional auxiliary contact modules (e.g. LA9-DN22) need to be configured.

Short-Circuit Protection: Select appropriate fuses (e.g. Littelfuse LDC series) based on the system short-circuit capacity to ensure SCCR compliance.

Environmental Conditions: For high-temperature or high-humidity environments confirm whether the model supports an extended temperature range.

1. Maintenance and Precautions
2. Daily Maintenance

– Regularly check the contact wear condition; replace the contacts when their thickness is reduced to 1/3 of the initial value.

– Clean dust and debris inside the arc-extinguishing cover to ensure arc-extinguishing effect.

2. Troubleshooting

Coil Burnout: Check if the voltage is stable and avoid long-term operation under overvoltage or undervoltage.

Contact Welding: Overload or frequent starting may cause contact welding; reduce the load or replace the contactor.

1. Price and Supply

Reference Price: Domestic models are approximately 500-800 RMB per unit and imported models (e.g. LC1D150E7) are approximately 2400 RMB per unit.

Supply Lead Time: Domestic models are usually in stock or shipped within 3 days; imported models require 7-15 days.

VII. Alternative Models

If the LC1D150 is out of stock or an upgrade is needed the following alternatives can be considered:

TeSys Deca Series: LC1D170 (170A) or LC1D205 (205A) which have better performance and compatible installation dimensions.

Intelligent Upgrade: TeSys iC65 Contactor (with communication function supporting the EcoStruxure system).