TeSys LRD thermal overload relays - 1.6...2.5 A - class 10A
LRD07

TeSys LRD thermal overload relay, 2.5A/690V, thermal setting range 1.6-2.5A, tripping class 10A, for protection of 3-phase motors 0.75kW@400V. Differential device with phase failure (loss). It provides a thermal adjustement dial, a manual-automatic reset selector, a test selector for simulation of a tripping, reset and stop buttons, a flag indicator and 2 auxiliary contacts 1NO+1NC for fault signalling. Settings are protected by a transparent cover lockable by sealing. Connection by screw clamp terminals, it connects directly to the bottom terminals of 3-pole contactors LC1D09-D38. Mounting on DIN rail or screw fixing, separated from the contactor, with use of a terminal block LAD7B106 (to be ordered separately). Multi standards certified (IEC, UL, CSA, CCC, EAC, ATEX, Marine).


Main Characteristics

• Range of product: TeSys D / TeSys Deca

• Product or component type: Differential thermal overload relay

• Device short name: LRD

• Relay application: Motor protection

• Product compatibility: LC1D09, LC1D12, LC1D18, LC1D25, LC1D32, LC1D38

• Network type: AC, DC

• Thermal overload class: Class 10A conforming to IEC 60947-4-1

• Thermal protection adjustment range: 1.6...2.5 A

• Rated insulation voltage ([Ui]): Power circuit: 690 V (IEC), 600 V (UL/CSA)
   

Complementary Specifications & Ratings

• Tripping & Phase Failure:

  • Tripping threshold: 1.14 +/- 0.06 Ir conforming to IEC 60947-4-1

  • Phase failure sensitivity: Tripping current 130 % of Ir on two phase, the last one at 0

• Auxiliary Contacts & Ratings:

  • Auxiliary contact composition: 1 NO + 1 NC

  • Conventional free air thermal current ([Ith]): 5 A for signalling circuit

  • Rated operational voltage ([Ue]): 690 V AC for power circuit

• Control & Adjustments:

  • Control type: Red push-button (stop), Blue push-button (reset)

  • Temperature compensation: -20…60 °C

• Dimensions & Weight:

  • Height: 66 mm, Width: 45 mm, Depth: 70 mm

  • Net weight: 0.124 kg
     

Environment & Compliance

• IP degree of protection: IP20 conforming to IEC 60529

• Ambient air temperature:

  • Operation: -20…60 °C without derating

  • Storage: -60…70 °C

• Standards & Certifications: EN/IEC 60947-4-1/-5-1, UL 60947-4-1/-5-1, CSA C22.2, ATEX INERIS, UKCA, and marine certifications (DNV-GL, BV, RINA, LROS)

• Contractual warranty: 18 months