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Closed loop (compensated)
| Primary Current, Measuring Range | 0 .. ± 500 A |
| Conversion Ratio (KN) | 1 : 2000 |
| Secondary Nominal RMS Current (ISN) | 150 mA |
| Response Time to 90 % of IPN Step | < 1 µs |
| Isolation Test Voltage (50 Hz, 1 min) | 6 kV |
| Impulse Withstand Voltage (1.2/50 µs) | > 7.3 kV |
UNVERIFIED.
The LF 306-S 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 UNVERIFIED.
Key characteristics from the official datasheet: frequency bandwidth DC .. 100 kHz; operating temperature - 25 .. + 70.
| General Information | |
|---|---|
| Manufacturer | LEM |
| Product Series | LF |
| Product Reference | LF 306-S |
| Primary Nominal Current | 300 A |
| Supply Voltage | ± 12 .. 15 V |
| Measurement | currents: DC, AC, pulsed... |
| Mounting | Busbar Mount |
| Application Domain | Industrial |
| Electrical Data — LF 306-S | |
|---|---|
| Primary Nominal RMS Current (IPN) | 300 A |
| Primary Current, Measuring Range (IPM) | 0 .. ± 500 A |
| Secondary Nominal RMS Current (ISN) | 150 mA |
| Conversion Ratio (KN) | 1 : 2000 |
| Supply Voltage (UC) | ± 12 .. 15 V |
| Current Consumption (IC) | 20 (@ ± 15 V) + IS mA |
| Accuracy & Dynamic Performance | |
|---|---|
| Overall Accuracy @ IPN, TA = 25 °C (XG) | ± 0.4 % |
| Offset Current @ IP = 0, TA = 25 °C (IO) | ± 0.20 mA |
| Magnetic/Residual Offset Current (IOM) | ± 0.08 mA |
| Temperature Variation of IO (Max) | ± 0.64 mA |
| Reaction Time @ 10 % of IPN (tra) | < 500 ns |
| Response Time to 90 % of IPN Step (tr) | < 1 µs |
| di/dt Accurately Followed | > 100 A/µs |
| Frequency Bandwidth (-1 dB) (BW) | DC .. 100 kHz |
| Insulation Coordination | |
|---|---|
| RMS Voltage for AC Insulation Test (50 Hz, 1 min) Ud | 6 kV |
| Impulse Withstand Voltage (1.2/50 µs) UNi | > 7.3 kV |
| Creepage Distance (dCp) | 8 mm |
| Clearance (dCI) | 7.15 mm |
| Comparative Tracking Index (CTI) | 175 |
| Overvoltage Category / Pollution Degree | Over voltage category OV · Pollution degree PD2 |
| Environmental & Mechanical Characteristics | |
|---|---|
| Ambient Operating Temperature (TA) | - 25 .. + 70 °C |
| Ambient Storage Temperature (TA st) | - 40 .. + 90 °C |
| Secondary Coil Resistance @ TA = 70 °C (RS) | 34 Ω |
| Mass (m) | 60 g |
| Standards & Certifications | |
|---|---|
| EN 50178 | : |
Note: Specifications are taken from the official LF 306-S datasheet. Parameters that could not be confirmed from the datasheet are marked UNVERIFIED.
Official technical documentation for the LF 306-S.
Outline dimensions, pin layout and connection diagrams of the LF 306-S are shown below.
| Outline Dimensions & Mechanical Data | |
|---|---|
| Mass | 60 g |
Note: All dimensions are in millimetres. Refer to the official datasheet for the complete dimension drawing.
Typical applications of the LF 306-S.
Characteristic curve diagrams are not included in the LF 306-S datasheet; the relevant characteristics are the accuracy and dynamic performance data listed below.
| Accuracy & Dynamic Characteristics | |
|---|---|
| Overall Accuracy @ IPN, TA = 25 °C (XG) | ± 0.4 % |
| Response Time to 90 % of IPN Step (tr) | < 1 µs |
| di/dt Accurately Followed | > 100 A/µs |
| Frequency Bandwidth (-1 dB) (BW) | DC .. 100 kHz |
Note: For the full set of performance data, refer to the datasheet.
Other models of the LF Series share the same measurement principle, mounting concept and output interface family.
