Schneider LRD04 TeSys Deca Thermal Overload Relay 0.4-0.63A

The Schneider Electric LRD04 is a TeSys LRD differential thermal overload relay for motor protection. It features a thermal overload setting range of 0.4 to 0.63 A with Class 10A tripping per IEC 60947-4-1, and mounts directly below LC1D-series contactors for compact panel integration on AC and DC networks up to 690 V.

Technical specifications:

• Commercial reference: LRD04
• Manufacturer: Schneider Electric
• EAN:
• Series / range: TeSys LRD / TeSys Deca
• Product type: Differential thermal overload relay
• Thermal overload setting: 0.4...0.63 A
• Tripping class: Class 10A per IEC 60947-4-1
• Network type: AC / DC, 0...400 Hz
• Rated voltage [Ue]: 690 V AC per IEC 60947-4-1
• Rated insulation voltage [Ui]: 690 V per IEC 60947-4-1
• Rated impulse withstand voltage [Uimp]: 6 kV
• Tripping threshold: 1.14 +/- 0.06 Ir per IEC 60947-4-1
• Phase loss sensitivity: trips at 130% Ir in two phases, last phase at 0
• Auxiliary contacts: 1 NO + 1 NC
• Thermal current [Ith]: 5 A (signal circuit)
• Compatible contactors: LC1D09, LC1D12, LC1D18, LC1D25, LC1D32, LC1D38
• Mounting: Below contactor, panel or DIN rail (with accessories)
• Connection type: Screw terminal blocks; power circuit 1...6 mm² solid / 1.5...10 mm² flexible; control circuit 1...2.5 mm²
• Tightening torque: 1.7 N.m (power and control circuits)
• Temperature compensation: -20...60 °C
• IP protection: IP20 per IEC 60529
• Operating temperature: -20...60 °C per IEC 60947-4-1
• Storage temperature: -60...70 °C
• Dielectric strength: 1.89 kV at 50 Hz per IEC 60947-1
• Vibration resistance: 6 Gn per IEC 60068-2-6
• Shock resistance: 15 Gn for 11 ms per IEC 60068-2-7
• Flame resistance: V1 per UL 94
• Dimensions (WxHxD): 45 x 66 x 70 mm
• Weight: 0.124 kg
• Certifications: IEC, UL, CSA, CCC, EAC, BV, RINA, DNV-GL, LROS, ATEX, UKCA

Features and benefits:

• Phase loss detection trips at 130% Ir when two phases carry current and the last is at 0, protecting against single-phasing damage
• Direct mounting below LC1D contactors reduces panel wiring and overall footprint
• Red stop button and blue reset button allow manual stop and reset after tripping
• Wide temperature compensation from -20 to 60 °C maintains consistent tripping accuracy across varying ambient conditions
• Auxiliary 1 NO + 1 NC contact provides signalling and remote fault indication

Applications:

• Motor protection in direct-on-line starters within industrial automation panels
• Pump, fan, and compressor motor control in process and building installations
• Marine and offshore motor control panels (DNV-GL and LROS certified)
• Hazardous area control systems (ATEX certified)

Compliant with EN/IEC 60947-4-1, EN/IEC 60947-5-1, UL 60947-4-1, CSA C22.2 No 60947-4-1, GB/T 14048.4, and EN 50495. Part of the Schneider Electric TeSys Deca range.

Also known as: Schneider LRD04, Schneider Electric LRD04, TeSys thermal overload relay, motor overload protection relay.