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Electronic thermal overload relay

TeSys LRF

– electronic thermal overload relay – 30…50 A – class 10

✔️Environmental performance of the product

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Description

TeSys LR9F electronic overload relay, thermal setting range 30-50A, class 10, for protection of motors 18.5-22kW@400V. to be mounted directly below a TeSys F 3-pole contactor LC1 F115, F150, F185, use of a support mounting plate LA7F901 is recommended (to be ordered separately). Motor protection includes thermal overload of 1-phase and 3-phase motors, phase failure, phase unbalance, prolonged starting times, stalled rotor conditions. On the front of the relay, it provides a thermal adjustement dial, buttons for test, stop & reset, a trip indicator, trip auxiliary contacts 1NO+1NC. Multi standards certified (IEC, UL, CSA, CCC, Marine), Green Premium compliant (RoHs/Reach).

Specifications

Main
Range TeSys
Product name TeSys LRF
device short name LR9F
Product or component type Electronic thermal overload relay
Relay application Motor protection
Product compatibility LC1F115...LC1F185
Network type AC
Thermal overload class Class 10 conforming to IEC 60947-4
Thermal protection adjustment range 30…50 A
Complementary
Network frequency 50/60 Hz
Mounting support Direct on contactor
Plate
Tripping threshold 1.12 +/- 0.06 In tripping conforming to IEC 60947-4-1
Surge withstand 4 kV conforming to IEC 61000-4-5
Contacts type and composition 1 NO + 1 NC
[Ith] conventional free air thermal current 5 A for control circuit
[Ue] rated operational voltage 1000 V AC 50/60 Hz for power circuit conforming to VDE 0110 group C
[Ui] rated insulation voltage Power circuit: 1000 V AC conforming to IEC 60947-4
[Uimp] rated impulse withstand voltage 8 kV conforming to IEC 60947-1
Phase failure sensitivity Tripping in 4 s +/- 20 % conforming to IEC 60947-4-1
Reset Manual reset on front relay
Control type Dial white full-load current adjustment
Test button red
Push-button red reset
Push-button stop
Local signalling Trip indicator
Temperature compensation -20…70 °C
Current consumption <= 5 mA no-load
switching capacity for alarm 0...150 mA
Maximum voltage drop <2.5 V closed state
Connections - terminals Control circuit: screw clamp terminals 1 cable 0.75…2.5 mm² - cable stiffness: flexible - with cable end
Control circuit: screw clamp terminals 1 cable 0.75…2.5 mm² - cable stiffness: solid
Control circuit: screw clamp terminals 1 cable 0.75…4 mm² - cable stiffness: flexible - without cable end
Control circuit: screw clamp terminals 2 cable 1…1.5 mm² - cable stiffness: flexible - with cable end
Control circuit: screw clamp terminals 2 cable 1…2.5 mm² - cable stiffness: flexible - without cable end
Control circuit: screw clamp terminals 2 cable 1 mm² - cable stiffness: solid
Power circuit: lugs-ring terminals M6
Tightening torque Control circuit: 1.2 N.m on screw clamp terminals
Power circuit: 10 N.m on screw clamp terminals
Height 96 mm
Width 115 mm
Depth 123.5 mm
Product weight 0.885 kg
Environment
Standards IEC 60255-8
IEC 60947-4-1
VDE 0660
IEC 60255-17
EN 60947-4-1
Product certifications CSA
UL
UKCA
Protective treatment TH
IP degree of protection IP20 conforming to IEC 60529
IP20 conforming to VDE 0106
Ambient air temperature for operation -20…55 °C conforming to IEC 60255-8
Ambient air temperature for storage -40…85 °C
Operating altitude <= 2000 m without derating
Fire resistance 850 °C conforming to IEC 60695-2-1
Mechanical robustness Shocks: 13 Gn for 11 ms conforming to IEC 60068-2-7
Vibrations 5...300 Hz: 2 GN conforming to IEC 60068-2-6
Dielectric strength 6 kV 50 Hz conforming to IEC 255-5
Electromagnetic compatibility Resistance to electrostatic discharge: 6 kV in indirect mode conforming to IEC 61000-4-2
Resistance to electrostatic discharge: 8 kV in air conforming to IEC 61000-4-2
Radiated radio-frequency electromagnetic field immunity test: 10 V/m conforming to IEC 61000-4-3
Fast transients immunity test: 2 kV conforming to IEC 61000-4-4
Packing Units
Unit Type of Package 1 PCE
Number of Units in Package 1 1
Package 1 Height 13.5 cm
Package 1 Width 15.0 cm
Package 1 Length 16.0 cm
Package 1 Weight 779.0 g
Unit Type of Package 2 S04
Number of Units in Package 2 12
Package 2 Height 30.0 cm
Package 2 Width 40.0 cm
Package 2 Length 60.0 cm
Package 2 Weight 10.218 kg
Contractual warranty
Warranty 18 months

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