Product Description
Schneider Electric LRD21 – Reliable Thermal Overload Protection for Motors
Schneider Electric LRD21 is a strong and multi-purpose thermal overload relay designed basically for motor protection applications. Within the series TeSys Deca range, it protects motors from overload and phase failure within large limits, specifically in the industrial setting. It is a current-adjustable type with a range between 12–18 A for greater accuracy in monitoring the motors.
The LRD 21 series is compatible with contactor LC1D18, LC1D25, LC1D32 & LC1D38. There is also a compatibility of LRD21 with motor-control systems so that there is wide protection alongside maintained operational performances.
Key Features
- Thermal Overload Range: Adjustable from 12 to 18 A depending on the application.
- Control Type:
- Red Stop Button: Manually stops.
- Blue Reset Button: Quickly Resets.
- Auxiliary Contacts: This has 1 NO (Normally Open) & 1 NC (Normally Closed) in it to give extended functions.
- Durability: Designed for Temperature: -4°F to 140°F (-20°C to 60°C).
- Voltage Ratings:
- Insulation Voltage: 600V (CSA/UL) & 690V (IEC)
- Impulse Withstand Voltage: 6kV.
- Mounting Options: Plate, rail, or direct mounting under compatible contactors for ease of installation.
Technical Specifications
| Attribute | Details |
| Thermal Class | Class 10A (IEC 60947-4-1) |
| Adjustable Current Range | 12 to 18 A |
| Phase Failure Sensitivity | Tripping current at 130% of Ir on two phases with one at 0. |
| Signal Circuit Current | 5A free air thermal current. |
| Degree of Protection | IP20 conforming to IEC 60529. |
| Dimensions | 2.6" (66 mm) H x 1.8" (45 mm) W x 2.8" (70 mm) D |
| Certifications | UL, CSA, IEC, CCC, EAC, BV, RINA, DNV-GL, LROS, UKCA |
Applications
The Schneider Electric LRD21 thermal overload relay will operate best in applications that demand:
- Industrial Motor Control: Offers overload protection for manufacturing and automation applications.
- HVAC Systems: Assures safety and reliability to heating and cooling motor drives.
- Energy Management: Ensures efficiency in motor failure reduction.
Why Schneider Electric LRD21?
- Advanced Protection: Enhanced sensitive phase failure detection and overload protection increases protection to motors.
- International Compliance: Tested to UL, CSA, IEC international standards, plus many others.
- Easy Mounting: Its compact dimensions allow installation in even the tightest or any new install space.
Take a step ahead with the Schneider Electric LRD21 Thermal Overload Relay on your motor protection system. Engineered for reliability and efficiency, this was the better alternative for protecting motors. Order now for fast shipment along with superior performance.
