Schneider Electric Electronic Over Current Relays, Tesys LT47, Manual, 5 to 60A, 100 to 120V Ac LT4760F7S

TeSys LR47 electronic overcurrent relay, 60A/690V, with manual reset, to be supplied with 100-120V AC, for protection of motors with a rated current 5-50A. It provides 3 dials to adjust the protection, LOAD (5-60A) for the overcurrent level, O-TIME (0.3-10sec) for the acceptable duration of the overcurrent, D-TIME (0.5-30sec) for the starting duration. In addition, the device trips when there is a missing phase during more than O-TIME. The device has a reset button, a test/stop button, 2 LED indicators (Run/Trip), 2 auxiliary contacts 1NO+1NC for fault signalling. Settings can be locked by sealing the transparent cover. DIN rail mounting, without power terminals (currents monitored by 2 current transformers crossed by the motor cables). Multi standards certified (IEC, UL, CSA, CCC, EAC), it conforms to RoHS/REACh regulation.

Main

• Range: TeSys
• Product name: TeSys LT
• Product or component type: Electronic over current relay
• Device short name: LT47
• Device application: Protection, relay application
• Sensitivity to phase failure: Locked rotor, mechanical jamming I > 3 x Isetting
• Overload Imax > Isetting
• [Us] rated supply voltage: 100...120 V AC
• Thermal protection adjustment range: 5…60 A
• [Ui] rated insulation voltage:
• Power circuit: 600 V AC (conforming to CSA)
• Power circuit: 600 V AC (conforming to UL)
• Power circuit: 690 V AC (conforming to IEC 60947-4-1)

Complementary

• Network frequency: 50-60 Hz
• Mounting support: Rail
• Tripping threshold: 5-50 A
• Electromagnetic compatibility:
• Resistance to electrostatic discharge:
• 8 kV in open air (conforming to IEC 61000-4-2)
• 6 kV in direct mode (conforming to IEC 61000-4-2)
• Conducted emission: Class A (conforming to EN 55011)
• Immunity to electromagnetic interference: 10 V/m (conforming to IEC 61000-4-3)
• Immunity to fast transients: 2 kV (conforming to IEC 61000-4-4)
• Surge withstand: 6 kV (conforming to IEC 61000-4-5)
• Conducted HF disturbances: 10 V (conforming to IEC 61000-4-6)
• Auxiliary contact composition: 1 NO + 1 NC
• [Ith] conventional free air thermal current: 3 A for signalling circuit
• Associated fuse rating:
• 3 A gG for signalling circuit
• 3 A BS for signalling circuit
• [Uimp] rated impulse withstand voltage: 6 kV
• Time range:
• 0.5-30 s for control type D-time
• 0.3-10 s for control type O-time
• Local signalling:
• 1 LED (green)
• 1 LED (red)
• Control type:
• Push-button: reset
• Electrical: reset
• Connections - terminals:
• Signalling circuit:
• Screw clamp terminals 1 (1-2.5 mm²) - cable stiffness: flexible with cable end
• Screw clamp terminals 1 (1-2.5 mm²) - cable stiffness: flexible without cable end
• Screw clamp terminals 2 (1-2.5 mm²) - cable stiffness: flexible with cable end
• Screw clamp terminals 2 (1-2.5 mm²) - cable stiffness: flexible without cable end
• Tightening torque: Signalling circuit - 1.7 N.m M3.5
• Dimensions:
• Height: 70.3 mm
• Width: 71 mm
• Depth: 77.2 mm
• Net weight: 0.192 kg

Environment

• Standards:
• IEC 60255-6
• IEC 60947
• Product Certifications:
• UL
• CSA
• Protective Treatment: TH conforming to IEC 60068
• IP Degree of Protection:
• IP20 conforming to IEC 60529
• IP20 conforming to VDE 0106
• Ambient Air Temperature:
• For Operation: -25…60 °C without derating (conforming to IEC 60947-4-1)
• For Storage: -30…80 °C
• Operating Altitude: 2000 m
• Mechanical Robustness:
• Shocks: 15 Gn for 11 ms (conforming to IEC 60068-2-7)
• Vibrations: 4 gn (conforming to IEC 60068-2-6)
• Dielectric Strength: 2 kV at 50 Hz (conforming to IEC 60255-5)