Schneider Electric TeSys LT47 electronic over current relays - automatic - 5...60 A - 24 V AC/DC

LT4760BA
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Description

TeSys LR47 electronic overcurrent relay, 60A/690V, with automatic reset, to be supplied with 24V AC/DC, 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, R-TIME (1-120sec) for the automatic reset delay. 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.

Product Details

Activity PPCTR
Weight (in Kg) 0.192
Net weight 0.192 kg
[Us] rated supply voltage 24 V AC
24 V DC
Product Or Component Type electronic over current relay
Control Type automatic: reset
Protective Treatment TH conforming to IEC 60068
Tripping Threshold 5...50 A
Network frequency 50...60 Hz
Auxiliary Contact Composition 1 NO + 1 NC
Thermal Protection Adjustment Range 5-60 A
[IP] Degree of Protection IP20 conforming to IEC 60529
IP20 conforming to VDE 0106
Connections Terminals signalling circuit: screw clamp terminals 1 1-2.5 mm² - cable stiffness: flexible with cable end
signalling circuit: screw clamp terminals 1 1-2.5 mm² - cable stiffness: flexible without cable end
signalling circuit: screw clamp terminals 2 1-2.5 mm² - cable stiffness: flexible with cable end
signalling circuit: screw clamp terminals 2 1-2.5 mm² - cable stiffness: flexible without cable end
[Uimp] Rated Impulse Wthstand Voltage 6 kV
Ambient air temperature for operation -25-60 °C without derating conforming to IEC 60947-4-1
Range of Product TeSys LT electronic over current relays
Tightening Torque signalling circuit: 1.7 N.m M3.5
Standards IEC 60947
IEC 60255-6
Product Certifications UL
CSA
Mechanical Robustness shocks: 15 Gn for 11 ms conforming to IEC 60068-2-7
vibrations: 4 gn conforming to IEC 60068-2-6
[Ith] Conventional Free Air Thermal Current 3 A for signalling circuit
[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
Associated Fuse Rating 3 A gG for signalling circuit
3 A BS for signalling circuit
Mounting support rail
Local Signalling 1 LED (green)
1 LED (red)
Electromagnetic Compatibility resistance to electrostatic discharge: 8 kV in open air conforming to IEC 61000-4-2
resistance to electrostatic discharge: 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
Relay Application overload Imax > Isetting
sensitivity to phase failure
locked rotor, mechanical jamming I > 3 x Isetting
Dielectric Strength 2 kV at 50 Hz conforming to IEC 60255-5
Time Range 1...120 s - control type R-time
0.3...30 s - control type O-time
Device short name LT47
Depth 77.2 mm
Ambient air temperature for storage -30-80 °C
Height 70.3 mm
width 71 mm
Operating altitude 2000 m
Compatibility code LT47
Device Application protection
Brand Schneider Electric

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