OPIS PRODUKTU
SCHNEIDER ELECTRIC LRD-21 - Thermal Overload Relay
The SCHNEIDER ELECTRIC LRD-21 is a TeSys LRD series thermal overload relay engineered for the electromechanical protection of AC motors against overloads and phase failure. This device integrates directly into industrial motor control circuits, providing essential safety and operational continuity for applications such as pumping systems, conveyors, and HVAC units. It utilizes bimetallic strips for precise thermal sensing and features a Class 10A trip characteristic.
Technical Specifications:
- SERIES/FAMILY: TeSys LRD
- COMPONENT TYPE: Thermal Overload Relay
- ELECTRICAL SPECS:
- CURRENT ADJUSTMENT RANGE: 17-25 A
- RATED OPERATIONAL VOLTAGE (Ue): Up to 690 V AC
- RATED INSULATION VOLTAGE (Ui): 690 V AC
- RATED IMPULSE WITHSTAND VOLTAGE (Uimp): 6 kV
- FREQUENCY: 50/60 Hz
- TRIP CLASS: Class 10A
- MECHANICAL/PHYSICAL:
- NUMBER OF POLES: 3P
- RESET TYPE: Manual/Automatic
- INTERFACE/CONTROL:
- AUXILIARY CONTACTS: 1 NO + 1 NC
- ENVIRONMENTAL/MOUNTING:
- IP RATING: IP20 (Terminals), IP20 (Casing)
- OPERATING TEMPERATURE: -20 to 60 °C
- STORAGE TEMPERATURE: -60 to 70 °C
- MOUNTING STYLE: Direct on contactor, or independent with terminal block
- COMPATIBILITY/APPLICATION:
- COMPATIBILITY: TeSys D contactors (e.g., LC1D09 to LC1D38)
- APPLICATION: Overload and phase failure protection for three-phase AC motors in industrial machinery, process automation, and control panels.
