TeSys LRD - electronic thermal overload relay - 3P - 1.6...8 A

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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).

Product Details

[ue] Rated Operational Voltage 690 V for power circuit
[ui] Rated Insulation Voltage power circuit: 1000 V
[uimp] Rated Impulse Withstand Voltage 6 kV
Ambient Air Temperature for Operation -25-70 °C conforming to IEC 60255-8
Ambient Air Temperature for Storage -55-80 °C
Control Type red push-button: stop and manual reset
Depth 79.9 mm
Device Short Name LR9D
Dielectric Strength 6 kV 50 Hz conforming to IEC 60255-5
Electromagnetic Compatibility surge withstand: 2 kV common mode conforming to IEC 61000-4-5
Height 72.5 mm
Ip Degree of Protection IP20 front face conforming to IEC 60529
Mechanical Robustness vibrations 10...150 Hz: 6 Gn conforming to IEC 60068-2-6
Mounting Support under contactor
Net Weight 0.18 kg
Power Consumption in w 300 mW
Product Certifications IECEE CB Scheme
Product Compatibility LC1D12
Product Name TeSys LRD
Product or Component Type electronic thermal overload relay
Range TeSys
Standards EN/IEC 60947-4-1
Tightening Torque control circuit: 0.8 N.m on screw clamp terminals
Width 45 mm
Connections - Terminals control circuit: screw clamp terminals 1 cable 2.5-2.5 mm² - cable stiffness: solid or flexible - without cable end
[ith] Conventional Free Air Thermal Current 5 A for signalling circuit
Associated Fuse Rating 5 A gG for signalling circuit
Operating Altitude 2000 m without derating
Phase Failure Sensitivity phase difference > 40% 3-3 s conforming to IEC 60947-4-1
Relay Application motor protection
Thermal Overload Class class 5…30
Thermal Protection Adjustment Range 1.6-8 A
Time Range 1.5...4 min - automatic reset time
Tripping Threshold 1.25 In conforming to IEC 60947-4-1

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