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Closed loop (compensated)
| Primary Current, Measuring Range | 6000 A |
| Supply Voltage | ±22.8 ... ±25.2 V |
| Operating Temperature Range | −40 ... 70 °C |
| Isolation Test Voltage | 12 kV |
| Primary Nominal RMS Current (IPN) | 4000 A |
| Current Consumption (IC) | 25 ... 29 mA |
AC variable speed and servo motor drives, Static converters for DC motor drives, Battery supplied applications, Uninterruptible Power Supplies (UPS), Switched Mode Power Supplies (SMPS), Power supplies for welding applications, Single or three phase inverters, Propulsion and braking choppers, Propulsion converters, Auxiliary converters, High power drives, Substations.
The LT 4000-S/SP34 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 AC variable speed and servo motor drives, Static converters for DC motor drives, Battery supplied applications and Uninterruptible Power Supplies (UPS).
Key characteristics from the official datasheet: linearity error 0.2 % of IPN; operating temperature −40 ... 70 °C.
| General Information | |
|---|---|
| Manufacturer | LEM |
| Product Series | LT |
| Product Reference | LT 4000-S/SP34 |
| Primary Nominal Current | 4000 A |
| Supply Voltage | ±22.8 ... ±25.2 V |
| Measurement | current: DC, AC, pulsed... |
| Mounting | Panel Mount |
| Application Domain | Industrial, Railway (fixed installations and onboard) |
| Electrical Data — LT 4000-S/SP34 | |
|---|---|
| Primary Nominal RMS Current (IPN) | 4000 A |
| Primary Current, Measuring Range (IPM) | 6000 A |
| Supply Voltage (UC) | ±22.8 ... ±25.2 V |
| Current Consumption (IC) | 25 ... 29 mA |
| Accuracy & Dynamic Performance | |
|---|---|
| Linearity Error (εL) | 0.2 % of IPN |
| Response Time to 90 % of IPN Step | 1 µs |
| Insulation Coordination | |
|---|---|
| RMS Voltage for AC Insulation Test (50 Hz, 1 min) Ud | 12 kV |
| 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) | −40 ... 70 °C |
| Ambient Storage Temperature (TA st) | −50 ... 85 °C |
| Mass (m) | 6000 g |
| Standards & Certifications | |
|---|---|
| IEC 61010-1 | Compliance |
| EN 61326-1 | Compliance |
| EN 50155 | 2021. |
Note: Specifications are taken from the official LT 4000-S/SP34 datasheet. Parameters that could not be confirmed from the datasheet are marked UNVERIFIED.
Official technical documentation for the LT 4000-S/SP34.
Outline dimensions, pin layout and connection diagrams of the LT 4000-S/SP34 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/SP34.
The characteristic curves of the LT 4000-S/SP34 from the official datasheet are shown below.
| Accuracy & Dynamic Characteristics | |
|---|---|
| Linearity Error (εL) | 0.2 % of IPN |
| Response Time to 90 % of IPN Step | 1 µs |
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.
