TeSys LRD Motor Protection Relay, 1.6-8A, 3 Phase, 6kV Impulse, IP20
Schneider Electric

Schneider Electric LR9D08 TeSys LRD Motor Protection Relay, 1.6-8A, 3 Phase, 6kV Impulse, IP20

  • MPN: LR9D08
  • PPN: SCH-LR9D08
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    $231.05

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    Spec sheet

    Description

    TeSys LR9D electronic overload relay, 8A/690V, thermal setting range 1.6-8A, selectable tripping class 5-10-20-30, for protection of 3-phase motors 0.75-3kW@400V. Differential device with phase failure and load unbalance detection. It provides a thermal adjustement dial, buttons for test, stop and reset as well as manual-automatic reset selector, dipswitches for tripping class selection, 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 contactor, with use of the terminal block LAD7B205 (to be ordered separately). Multi-standards certified (IEC, UL, CSA, CCC), Green Premium compliant (RoHs/Reach).

    Features

    • Unlike standard fixed thermal relays, the LR9D08 features an adjustable trip-class dial (selectable for Class 5, 10, 20, or 30). This allows industrial control engineers to precisely match the relay’s trip curve to the motor's specific startup inertia—safeguarding high-torque applications like rock crushers and industrial centrifuges from overheating without causing premature nuisance trips during standard operation.
    • Featuring a highly accurate, continuous adjustment dial from 1.6 to 8 Amps, this electronic thermal overload relay allows industrial engineers and automation maintenance technicians to tune protection to the exact full-load current (FLC) listed on their motor's nameplate. This wide, precise window covers a massive array of standard 3-phase pump, fan, and conveyor motors, significantly reducing the variety of spare parts inventory you need to stock on your facility shelves.
    • Unlike standard bimetallic thermal overloads, the LR9D08 utilizes internal electronic current sensors that directly measure real-time motor current. This advanced technology delivers a highly precise thermal image of the motor windings, drastically reducing the risk of nuisance trips caused by high ambient panel temperatures while maintaining strict, dependable defense against damaging continuous overcurrent conditions.
    • Built with a robust 6 kV impulse withstand rating (U_imp), this device is engineered to tolerate intense, transient voltage surges caused by lightning strikes or adjacent heavy industrial switching. This high-insulation safety profile prevents dielectric breakdown across the control circuitry, safeguarding sensitive downstream PLC inputs and maintaining overall control system integrity during volatile power grid anomalies.

    Documentation & Downloads

    Specifications

    Key Specifications

    Thermal Protection Adjustment Range
    1.6-8 A
    Relay Application
    motor protection
    Product Name
    TeSys LRD
    Range
    TeSys
    Product Compatibility
    LC1D12 || LC1D32 || LC1D38 || LC1D09 || LC1D25 || LC1D18
    Power Consumption In W300 mW
    Product Or Component Typeelectronic thermal overload relay
    Thermal Overload Classclass 5…30
    Mounting Supportunder contactor || plate, with specific accessories || rail, with specific accessories
    Device Short NameLR9D

    Complementary

    Time Range
    1.5...4 min - automatic reset time
    [Ith] Conventional Free Air Thermal Current
    5 A signalling circuit
    Phase Failure Sensitivity
    phase difference > 40% 3-3 s IEC 60947-4-1
    Electromagnetic Compatibility
    surge withstand 2 kV common mode IEC 61000-4-5 || resistance to electrostatic discharge 8 kV IEC 61000-4-2 || immunity to radiated radio-electrical interference 10 V/m IEC 61000-4-3 || immunity to fast transients 2 kV IEC 61000-4-4
    Net Weight
    0.18 kg
    Connections - Terminals
    control circuit screw clamp terminals 1 2.5-2.5 mm² solid or flexible - without cable end || power circuit screw clamp terminals 1 16-16 mm² solid or flexible - without cable end
    Tripping Threshold
    1.25 In IEC 60947-4-1
    Width
    45 mm
    Height72.5 mm
    Tightening Torquecontrol circuit 0.8 N.m screw clamp terminals || power circuit 3.1 N.m screw clamp terminals
    [Ue] Rated Operational Voltage690 V power circuit || 660 V signalling circuit
    Associated Fuse Rating5 A gG for signalling circuit || 5 A BS for signalling circuit
    [Uimp] Rated Impulse Withstand Voltage6 kV
    [Ui] Rated Insulation Voltagepower circuit 1000 V || signalling circuit 690 V
    Control Typered push-button stop and manual reset || white 2 microswitches adjustable trip class || red knob automatic reset || white dial full-load current adjustment
    Depth79.9 mm

    Environment

    Product Certifications
    IECEE CB Scheme || UL || CSA || CCC
    Standards
    EN/IEC 60947-4-1 || EN/IEC 60947-5-1 || UL 60947-4-1 || UL 60947-5-1 || CSA C22.2 No 60947-4-1 || CSA C22.2 No 60947-5-1 || GB/T 14048.4 || GB/T 14048.5
    Dielectric Strength
    6 kV 50 Hz IEC 60255-5
    Ip Degree Of Protection
    IP20 front face IEC 60529
    Mechanical Robustnessvibrations 10...150 Hz6 Gn IEC 60068-2-6 || shocks 11 ms15 gn IEC 60068-2-7
    Ambient Air Temperature For Operation-25-70 °C IEC 60255-8
    Ambient Air Temperature For Storage-55-80 °C
    Operating Altitude2000 m without derating

    Offer Sustainability

    Rohs Exemption Information
    Yes
    Environmental Disclosure
    ENVPEP1502001EN
    Reach Regulation
    Reference contains Substances of Very High Concern above the threshold
    China Rohs Regulation
    Product out of China RoHS scope. Substance declaration for your information
    Eu Rohs Directive
    Compliant with Exemptions
    Mercury FreeYes
    Sustainable Offer StatusGreen Premium product
    WeeeThe product must be disposed on European Union markets following specific waste collection and never end up in rubbish bins
    Circularity ProfileENVEOLI1502001EN

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