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LRD03
The Schneider Electric LRD03 is a differential thermal overload relay designed for process protection. It features a current adjustment range of 0.25 to 0.4 A and operates efficiently within a thermal overload class of 10A as per IEC standards.
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Technical specifications for LRD03
| Manufacturer | Schneider Electric |
|---|---|
| Product Type | Differential thermal overload relay |
| Product Line | TeSys |
| Part Number | LRD03 |
| EAN | 3389110346732 |
| Weight | 0.25 lbs (0.11 kg) |
| Current Adjustment Range | 0.25 – 0.4 A |
| Thermal Overload Class | Class 10A (IEC 60947-4-1) |
| Insulation Voltage | 600V (UL, CSA), 690V (IEC 60947-4-1) |
| Operational Voltage | Up to 690V AC (0-400 Hz) |
| Impulse Withstand Voltage | 6 kV |
| Phase Failure Sensitivity | Trips at 130% of set current when two phases remain energized |
| Tripping Threshold | 1.14 ± 0.06 × Ir (IEC 60947-4-1) |
| Network Compatibility | AC & DC |
| Mounting Options | Plate, rail, or under contactor |
| Control Interface | Red stop button, blue reset button |
| Auxiliary Contacts | 1 Normally Open (NO) + 1 Normally Closed (NC) |
| Operating Temperature | -20 to 60°C (-4 to 140°F) |
| Protection Rating | IP20 (IEC 60529) |
The LRD03 model from Schneider Electric's TeSys series is specifically crafted as a differential thermal overload relay for safeguarding machinery against overload conditions. It features an adjustment range catering to currents between 0.25 and 0.4 Amperes, fitting seamlessly into diverse applications. With certification as a Class 10A thermal overload relay according to IEC 60947-4-1, it promises reliability in operational performance.
This relay can withstand an insulation voltage of up to 600V for UL and CSA standards and as much as 690V for compliance with IEC specifications. The operational capabilities extend to power supply voltages up to 690V AC within a frequency range of 0-400 Hz, offering flexibility for various installation needs. The LRD03 also boasts an impulse withstand voltage rating of 6 kV, enhancing its durability.
The device is designed to monitor phase failure; it triggers an interruption when the load exceeds 130% of the preset current while two phases remain active. The tripping threshold adheres to the standard of 1.14 ± 0.06 times the adjusted current, ensuring precise functionality.
Compatibility with both AC and DC networks is a highlight, alongside multiple mounting options which allow for installation on plates, rails, or directly beneath contactors. The relay's control interface is user-friendly, featuring a red stop button alongside a blue reset button for quick operation.
For auxiliary functions, it is equipped with one normally open (NO) and one normally closed (NC) contact. The operational temperature range is broad, extending from -20 to 60 degrees Celsius (-4 to 140 degrees Fahrenheit), making it suitable for a variety of environments. With an IP20 protection rating per IEC 60529, the LRD03 effectively shields its internal components from unsolicited contact and minor debris ingress.
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