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Closed loop (compensated) voltage transducer using the Hall effect
| Secondary Nominal Current | 50 mA |
| Supply Voltage | ±24 V |
| Operating Temperature Range | −40 ... +85 °C |
| Isolation Test Voltage | 4.1 kV |
| Primary Nominal RMS Current (IPN) | 6.6 mA |
| Secondary Nominal RMS Current (ISN) | 50 mA |
AC variable speed drives and servo motor drives, Static converters for DC motor drives, Uninterruptible Power Supplies (UPS), Power supplies for welding applications. Application Domain, Railway (fixed installations and onboard).
The LV 25-1000/SP3 is a closed loop (compensated) current transducer from LEM for the electronic measurement of voltages: DC, AC, pulsed..., with galvanic isolation.
It offers excellent accuracy, very good linearity and low temperature drift. Typical applications include AC variable speed drives and servo motor drives, Static converters for DC motor drives, Uninterruptible Power Supplies (UPS) and Power supplies for welding applications. Application Domain.
Key characteristics from the official datasheet: total error ±0.8 %; linearity error < 0.2 %; operating temperature −40 ... +85 °C; nominal secondary output 50 mA.
| General Information | |
|---|---|
| Manufacturer | LEM |
| Product Series | LV |
| Product Reference | LV 25-1000/SP3 |
| Primary Nominal Current | 6.6 mA |
| Supply Voltage | ±24 V |
| Measurement | voltages: DC, AC, pulsed... |
| Mounting | Busbar Mount |
| Application Domain | Railway (fixed installations and onboard) |
| Electrical Data — LV 25-1000/SP3 | |
|---|---|
| Primary Nominal RMS Current (IPN) | 6.6 mA |
| Secondary Nominal RMS Current (ISN) | 50 mA |
| Turns Ratio (NP/NS) | 1000 V : 50 mA |
| Supply Voltage (UC) | ±24 V |
| Current Consumption (IC) | 20 (@ ±24 V) + I mA |
| Accuracy & Dynamic Performance | |
|---|---|
| Total Error (εtot) @ IPN | ±0.8 % |
| Linearity Error (εL) | < 0.2 % |
| Delay Time (tD) | < 19 us |
| Insulation Coordination | |
|---|---|
| RMS Voltage for AC Insulation Test (50 Hz, 1 min) Ud | 4.1 kV |
| Creepage Distance (dCp) | 13.8 mm |
| Clearance (dCI) | 13.8 mm |
| Comparative Tracking Index (CTI) | 175 |
| Environmental & Mechanical Characteristics | |
|---|---|
| Ambient Operating Temperature (TA) | −40 ... +85 °C |
| Ambient Storage Temperature (TA st) | −45 ... +90 °C |
| Mass (m) | 110 g |
| Case Material | Insulating plastic case according to UL 94-V0 |
| General Tolerance | ±0.3 mm |
| Standards & Certifications | |
|---|---|
| EN 50155 | Compliance |
Note: Specifications are taken from the official LV 25-1000/SP3 datasheet. Parameters that could not be confirmed from the datasheet are marked UNVERIFIED.
Official technical documentation for the LV 25-1000/SP3.
Outline dimensions, pin layout and connection diagrams of the LV 25-1000/SP3 are shown below.
| Outline Dimensions & Mechanical Data | |
|---|---|
| General Tolerance | ±0.3 mm |
| Mass | 110 g |
| Case Material | Insulating plastic case according to UL 94-V0 |
Note: All dimensions are in millimetres. Refer to the official datasheet for the complete dimension drawing.
Typical applications of the LV 25-1000/SP3.
Characteristic curve diagrams are not included in the LV 25-1000/SP3 datasheet; the relevant characteristics are the accuracy and dynamic performance data listed below.
| Accuracy & Dynamic Characteristics | |
|---|---|
| Total Error (εtot) @ IPN | ±0.8 % |
| Linearity Error (εL) | < 0.2 % |
Note: For the full set of performance data, refer to the datasheet.
Other models of the LV25 Series share the same measurement principle, mounting concept and output interface family.
