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Closed loop (compensated)
| Primary Current, Measuring Range | 0 .. ± 5000 A |
| Conversion Ratio (KN) | 1 : 5000 |
| Secondary Nominal RMS Current (ISN) | 660 mA |
| Response Time to 90 % of IPN Step | < 1 µs |
| Operating Temperature Range | - 25 .. + 70 °C |
| di/dt Accurately Followed | > 50 A/µs |
Single or three phase inverters, Propulsion and braking choppers, l o Prs ope ud nl o coo nvp te( rscompensated) current lsio er, A nu sxil diar uy cco env re rt uer ss, High power drives, sSuublsatatteionds. plastic case recognized aSctcanodradrding to UL 94-V0, EN 50155: 2021. Application Domain features, Railway (fixed installations and onboard). between primary and Connection to secondary circuit on LEMO EGJ. 1B. 304. CYC.
The LT 4000-S/SP24 is a closed loop (compensated) current transducer from LEM for the electronic measurement of current: DC, AC, pulsed..., with galvanic isolation.
It offers excellent accuracy, very good linearity, low temperature drift and wide frequency bandwidth. Typical applications include Single or three phase inverters, Propulsion and braking choppers, L o Prs ope ud nl o coo nvp te( rscompensated) current lsio er and A nu sxil diar uy cco env re rt uer ss.
Key characteristics from the official datasheet: linearity error 0.2 % of IPN; operating temperature −25 ... 70 °C.
| General Information | |
|---|---|
| Manufacturer | LEM |
| Product Series | LT |
| Product Reference | LT 4000-S/SP24 |
| Supply Voltage | ±22.8 ... ±25.2 V |
| Measurement | current: DC, AC, pulsed... |
| Mounting | Panel Mount |
| Application Domain | Railway (fixed installations and onboard). between primary and to secondary circuit on EGJ. 1B. 304 |
| Electrical Data — LT 4000-S/SP24 | |
|---|---|
| Primary Nominal RMS Current (IPN) | 3300 A |
| Primary Current, Measuring Range (IPM) | 0 .. ± 5000 A |
| Secondary Nominal RMS Current (ISN) | 660 mA |
| Conversion Ratio (KN) | 1 : 5000 |
| Supply Voltage (UC) | ±22.8 ... ±25.2 V |
| Current Consumption (IC) | 25 ... 29 mA |
| Accuracy & Dynamic Performance | |
|---|---|
| Linearity Error (εL) | 0.2 % of IPN |
| Offset Current @ IP = 0, TA = 25 °C (IO) | ± 0.8 mA |
| Temperature Variation of IO (Max) | ± 0.8 mA |
| Response Time to 90 % of IPN Step (tr) | < 1 µs |
| di/dt Accurately Followed | > 50 A/µs |
| Frequency Bandwidth (-1 dB) (BW) | DC .. 100 kHz |
| Insulation Coordination | |
|---|---|
| Impulse Withstand Voltage (1.2/50 µs) UNi | 17.7 kV |
| Creepage Distance (dCp) | 75.8 mm |
| Clearance (dCI) | 69.8 mm |
| Comparative Tracking Index (CTI) | 600 |
| Environmental & Mechanical Characteristics | |
|---|---|
| Ambient Operating Temperature (TA) | - 25 .. + 70 °C |
| Ambient Storage Temperature (TA st) | - 40 .. + 85 °C |
| Secondary Coil Resistance @ TA = 70 °C (RS) | 15 Ω |
| Mass (m) | 6000 g |
Note: Specifications are taken from the official LT 4000-S/SP24 datasheet. Parameters that could not be confirmed from the datasheet are marked UNVERIFIED.
Official technical documentation for the LT 4000-S/SP24.
Outline dimensions, pin layout and connection diagrams of the LT 4000-S/SP24 are shown below.
| Outline Dimensions & Mechanical Data | |
|---|---|
| Mass | 6000 g |
Note: All dimensions are in millimetres. Refer to the official datasheet for the complete dimension drawing.
Typical applications of the LT 4000-S/SP24.
The characteristic curves of the LT 4000-S/SP24 from the official datasheet are shown below.
| Accuracy & Dynamic Characteristics | |
|---|---|
| Linearity Error (εL) | 0.2 % of IPN |
| Response Time to 90 % of IPN Step (tr) | < 1 µs |
| di/dt Accurately Followed | > 50 A/µs |
| Frequency Bandwidth (-1 dB) (BW) | DC .. 100 kHz |
Note: Refer to the datasheet for the complete set of characteristic curves.
Other models of the LT Series share the same measurement principle, mounting concept and output interface family.
