LEM LF505-S/SP5 Current Transducer
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LEM LF505-S/SP5 Current Transducer
LF505-S/SP5 Closed-Loop Current Transducer
The LF505-S/SP5 is a closed-loop Hall effect current transducer designed to measure AC, DC, and pulsed currents reliably in industrial and commercial power electronics systems. With a nominal current rating of 500 ARMS and measuring range up to ±800 A, it delivers high performance under demanding load conditions. Its galvanic isolation between primary and secondary circuits ensures safety and stability in high-power applications.
Built for durability and efficiency, the LF505-S/SP5 offers ±15 to ±24 V supply voltage range, ±0.6% accuracy, fast response time (~1 µs), and an operating temperature range of –40 °C to +70 °C. It features excellent linearity and low temperature drift, with closed-loop technology minimizing insertion losses and improving performance under variable and pulsed current loads.
This transducer is well suited for industrial and commercial uses such as motor drives, variable speed drives, inverters, uninterruptible power supplies (UPS), renewables, and power supplies for welding or battery charging. Its panel-mount options and robust design make it suitable for systems where precision, endurance, and safety are required.
Key Specs
| Specification | Value / Description |
|---|---|
| Model | LF505-S/SP5 Current Transducer |
| Manufacturer | LEM (LF Series) |
| Nominal Primary Current | 500 ARMS |
| Measuring Range | ± 800 A |
| Supply Voltage | ± 15 V to ± 24 V |
| Accuracy | ± 0.6 % |
| Linearity Error | < ± 0.1 % |
| Response Time | < 1 µs (90 % of step) |
| Frequency Bandwidth | DC up to 100 kHz |
| Operating Temperature Range | −40 °C to +70 °C |
| Storage Temperature | −40 °C to +85 °C |
| Output Type | Ratiometric / Current-type output |
| Isolation / Case | Galvanic isolation, insulated plastic case (UL 94-V0) |
| Mounting Type | Panel mount / Chassis mount |
