Description
Schneider (LT4760M7A) EOCR Electronic Over Current Relay 5~60 A , 200~240 VAC
Model: LT4760M7A
| product or component type | Electronic over current relay | |
| device short name | LT47 | |
| device application | Protection | |
| relay application | Overload Imax > Isetting Locked rotor, mechanical jamming I > 3 x Isetting Sensitivity to phase failure |
|
| [Us] rated supply voltage | 200…240 V AC | |
| thermal protection adjustment range | 5~60A | |
| [Ui] rated insulation voltage | Power circuit: 600V AC conforming to CSA Power circuit: 600V AC conforming to UL Power circuit: 690V AC conforming to IEC 60947-4-1 |
| 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 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 |
|
| auxiliary contact composition | 1 NO + 1 NC | |
| [Ith] conventional free air thermal current | 3A for signalling circuit | |
| associated fuse rating | 3A gG for signalling circuit 3A BS for signalling circuit |
|
| [Uimp] rated impulse withstand voltage | 6kV | |
| time range | 1…120 s – control type R-time 0.3…30 s – control type O-time |
|
| local signalling | 1 LED (green) 1 LED (red) |
|
| control type | automatic: reset | |
| connections – terminals | Signalling circuit: screw clamp terminals 1 12.5mm – cable stiffness: flexible with cable end Signalling circuit: screw clamp terminals 1 12.5mm – cable stiffness: flexible without cable end Signalling circuit: screw clamp terminals 2 12.5mm – cable stiffness: flexible with cable end Signalling circuit: screw clamp terminals 2 12.5mm – cable stiffness: flexible without cable end |
|
| tightening torque | Signalling circuit: 1.7N.m M3.5 | |
| height | 70.3mm | |
| width | 71mm | |
| depth | 77.2mm | |
| net weight | 0.192kg |
Descriptions :
- LT47, solid state overload relay, compares motor current with preset load current threshold (LOAD).
- Motor currents are monitored through two internal current transformers.
- CT hole size is 12 mm in diameter.
- Please don’t allow excessive force on CTs.
- D-Time counts down and is only available for motor starting.
- During steady state, if motor current is greater than current setting(overloaded), LT47 switches its contacts after O-Time.
For shear-pin (mechanical shock) protection, set O-Time knob
to its minimum in order to trip in 0.2-0.3 s.
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