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Closed loop (compensated)
| Secondary Nominal Current | 100 mA |
| Supply Voltage | ±15 V |
| Operating Temperature Range | −40 ... +85 °C |
| Isolation Test Voltage | 5.5 kV |
| Primary Nominal RMS Current (IPN) | 300 A |
| Secondary Nominal RMS Current (ISN) | 100 mA |
Single or three phases inverters, Propulsion and braking choppers, Propulsion converters, Auxiliary converters, Battery chargers. Application Domain, Railway (fixed installations and onboard).
The LAC 300-S/SP2 is a closed loop (compensated) current transducer from LEM for the electronic measurement of currents: 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 phases inverters, Propulsion and braking choppers, Propulsion converters and Auxiliary converters.
Key characteristics from the official datasheet: total error ±1.0 %; linearity error < 0.1 %; frequency bandwidth DC ... 50 kHz; operating temperature −40 ... +85 °C; nominal secondary output 100 mA.
| General Information | |
|---|---|
| Manufacturer | LEM |
| Product Series | LAC |
| Product Reference | LAC 300-S/SP2 |
| Primary Nominal Current | 300 A |
| Supply Voltage | ±15 V |
| Measurement | currents: DC, AC, pulsed... |
| Mounting | Busbar Mount |
| Application Domain | Railway (fixed installations and onboard) |
| Electrical Data — LAC 300-S/SP2 | |
|---|---|
| Primary Nominal RMS Current (IPN) | 300 A |
| Secondary Nominal RMS Current (ISN) | 100 mA |
| Turns Ratio (NP/NS) | 1 : 3000 |
| Supply Voltage (UC) | ±15 V |
| Current Consumption (IC) | 25 + I mA P N |
| Accuracy & Dynamic Performance | |
|---|---|
| Total Error (εtot) @ IPN | ±1.0 % |
| Linearity Error (εL) | < 0.1 % |
| Frequency Bandwidth (BW) | DC ... 50 kHz |
| Insulation Coordination | |
|---|---|
| RMS Voltage for AC Insulation Test (50 Hz, 1 min) Ud | 5.5 kV |
| Creepage Distance (dCp) | 21.2 mm |
| Clearance (dCI) | 11.2 mm |
| Comparative Tracking Index (CTI) | 600 |
| Environmental & Mechanical Characteristics | |
|---|---|
| Ambient Operating Temperature (TA) | −40 ... +85 °C |
| Ambient Storage Temperature (TA st) | −45 ... +90 °C |
| Mass (m) | 137 g |
| Case Material | Insulating plastic case reco Ugnized according to UL 94-V0. |
| General Tolerance | ±0.5 mm |
Note: Specifications are taken from the official LAC 300-S/SP2 datasheet. Parameters that could not be confirmed from the datasheet are marked UNVERIFIED.
Official technical documentation for the LAC 300-S/SP2.
Outline dimensions, pin layout and connection diagrams of the LAC 300-S/SP2 are shown below.
| Outline Dimensions & Mechanical Data | |
|---|---|
| General Tolerance | ±0.5 mm |
| Mass | 137 g |
| Case Material | Insulating plastic case reco Ugnized 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 LAC 300-S/SP2.
Characteristic curve diagrams are not included in the LAC 300-S/SP2 datasheet; the relevant characteristics are the accuracy and dynamic performance data listed below.
| Accuracy & Dynamic Characteristics | |
|---|---|
| Total Error (εtot) @ IPN | ±1.0 % |
| Linearity Error (εL) | < 0.1 % |
| Frequency Bandwidth (BW) | DC ... 50 kHz |
Note: For the full set of performance data, refer to the datasheet.
Other models of the LAC Series share the same measurement principle, mounting concept and output interface family.
