Contactors / Overloads
Contactors & Overload Relays: Precision Control and Motor Protection
At United Force Trading Company, a trusted Schneider Retail Partner, Contactors and Overload Relays form a critical duo in low voltage (LV) power systems, enabling safe and efficient control of motors and electrical loads. These components work together to automate operations, protect equipment from damage, and ensure reliable performance across industrial, commercial, and infrastructure applications.
What Are Contactors and Overload Relays?
1. Contactors
Function: Electromechanical switches that remotely control power circuits, enabling the start/stop of motors, lighting, and other high-power loads.
Operation: Activated by a low-voltage control signal (e.g., from a PLC or push button), contactors use an electromagnetic coil to open or close contacts.
2. Overload Relays
Function: Protect motors from overheating caused by prolonged overcurrent (e.g., mechanical jams, voltage imbalances).
Operation: Monitor motor current and trip the circuit if thresholds are exceeded, disconnecting power via the contactor.
Types of Schneider Contactors / Overloads
1. Schneider Contactors (TeSys Series)
TeSys D:
Applications: General-purpose motor control (pumps, fans, conveyors).
Features: Compact design, up to 150A rating, and IEC/UL compliance.
TeSys F:
Applications: Heavy-duty industrial environments.
Features: High breaking capacity, corrosion-resistant materials.
TeSys G:
Applications: HVAC, refrigeration, and light industrial.
Features: Energy-efficient coil, silent operation.
2. Schneider Overload Relays (TeSys LRD/LR2 Series)
Thermal Overload Relays (LRD):
Function: Bimetallic strip technology for cost-effective motor protection.
Applications: Pumps, compressors, and machinery.
Electronic Overload Relays (LR9):
Function: Microprocessor-based precision with real-time diagnostics.
Applications: Critical processes requiring advanced protection (e.g., CNC machines).
Communication-Ready Relays:
Function: Integrate with IoT platforms like EcoStruxure for remote monitoring.
Key Features of Contractors & Overloads
- High Switching Capacity: Handle frequent operations without wear.
- Modular Design: Integrate auxiliary contacts, timers, or surge suppressors.
- Versatility: Available for AC/DC circuits and various load types.
- Adjustable Trip Settings: Calibrate to match motor full-load current (FLC).
- Reset Options: Manual or automatic reset after cooling.
- Phase Loss Protection: Detect and respond to unbalanced phases.
Applications of Contactors / Overloads
Industrial Automation: Motor control in assembly lines, robotics, and material handling.
HVAC Systems: Manage compressors, fans, and chillers.
Water Treatment: Control pumps and blowers.
Renewable Energy: Operate solar tracking systems or wind turbine pitch controls.
Why Schneider Contactors & Overload Relays?
Superior Durability: Engineered for millions of operational cycles, reducing maintenance costs.
Smart Integration:
EcoStruxure Compatibility: Monitor performance and predict failures via cloud-based analytics.
Plug-and-Play Accessories: Simplify upgrades with modular add-ons.
Safety Compliance: Meet IEC 60947-4-1 (contactors) and IEC 60947-4-2 (overloads) standards.
Energy Efficiency: Low-power coils and reduced heat generation lower operational costs.
Why Partner with United Force Trading Company?
Schneider-Certified Solutions: Authentic products backed by technical support and warranty.
Expert Guidance: Assistance in selecting the right contactor-overload combination for your motor’s specs.
Rapid Availability: Ready stock for urgent project timelines.
End-to-End Service: From installation best practices to lifecycle management.
At United Force Trading Company, we proudly serve as an authorized Schneider Retail Partner, offering trusted power and control solutions .
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