Compact Current Transducer LEM HXS 20-NP with High Immunity to External Interference and Consumption
Product Description
The LEM HXS 20-NP is a current transducer designed for the electronic measurement of DC, AC, and pulsed currents. It provides galvanic separation between the primary and secondary circuits, utilizing the Hall effect measuring principle. This multirange transducer is ideal for applications requiring a small size, space-saving design, high immunity to external interference, and a single power supply. Its applications include AC variable speed drives, servo motor drives, static converters for DC motor drives, Uninterruptible Power Supplies (UPS), Switched Mode Power Supplies (SMPS), and power supplies for welding applications. The transducer is recognized according to UL 94-V0 and offers fixed offset and sensitivity with low power consumption.
Product Attributes
- Brand: LEM
- Model: HXS 20-NP
- Origin: Switzerland (implied by LEM International SA address)
- Material: Insulating plastic case recognized according to UL 94-V0
- Certifications: UL 94-V0, EN 50178, IEC 61010-1, UL 508
Technical Specifications
| Parameter | Value | Unit | Notes |
| Primary nominal RMS current (IP N) | 20 | A | For HXS 20-NP |
| Primary current, measuring range (IP M) | ±60 | A | |
| Nominal sensitivity (SN) | 0.625 | V/A | |
| Output voltage (Analog) (Uout) | ±(0.625·IP/ IP N) | V | @ IP UO E |
| Reference voltage (Uref) | 2.5 ±0.025 | V | 1) |
| Output impedance (typ.) | 200 | Ω | |
| Load resistance (RL) | 2 | kΩ | |
| Output internal resistance (Rout) | < 5 | Ω | |
| Load capacitance (CL) (±20 %) | 4.7 | nF | |
| Supply voltage (UC) (±5 %) | 5 | V | 2) |
| Current consumption @ UC = 5 V | 19 | mA | |
| Error (@ IP N, TA = 25 °C) | ±1 | % | 3) |
| Linearity error (0 ... IP N) | ±0.5 | % | |
| Linearity error (0 ... 3 × IP N) | ±1 | % | |
| Temperature coefficient of UO E (+25 ... 105 °C) | ±0.4 | mV/K | |
| Temperature coefficient of UO E (−40 ... +25 °C) | ±0.525 | mV/K | |
| Temperature coefficient of Uref (+25 ... 105 °C) | ±0.01 | %/K | |
| Temperature coefficient of Uref (−40 ... +25 °C) | ±0.015 | %/K | |
| Temperature coefficient of UO E /Uref | ±0.15 | mV/K | |
| Temperature coefficient of S | ±0.05 | % of reading/K | TCS |
| Electrical offset voltage (@ IP = 0, TA = 25 °C) | ±0.0125 | V | UO E |
| Magnetic offset voltage (@ IP = 0 after overload) | ±0.7 | % | 3 × IPN |
| Delay time to 10 % (tD 10) | < 3 | µs | for IP N step |
| Delay time to 90 % (tD 90) | < 5 | µs | for IP N step 4) |
| Output voltage noise (DC ... 10 kHz) | < 20 | mVpp | Uno |
| Output voltage noise (DC ... 1 MHz) | < 40 | mVpp | Uno |
| Frequency bandwidth (−3 dB) | DC ... 50 | kHz | 5) |
| Ambient operating temperature (TA) | −40 ... +105 | °C | 1) UL recognized until +85 °C |
| Ambient storage temperature (TA st) | −40 ... +105 | °C | |
| Mass (m) | 10 | g | |
| Insulation test voltage (Ud RMS) | 3.5 | kV | 50 Hz, 1 min |
| Creepage distance (dCp) | 7.48 | mm | |
| Clearance (dCI) | 6.6 | mm | |
| Comparative tracking index (CTI) | > 600 | (group I) | |
| Rated insulation voltage (Basic) | 600 | V | According to EN 50178 / IEC 61010-1 |
| Rated insulation voltage (Reinforced) | 300 / 150 | V | According to EN 50178 / IEC 61010-1 |
| Primary RMS current (nominal IP N) | 5, 10, 20 | A | For different PCB layouts |
| Primary RMS current (maximum IP) | 15, 30, 60 | A | For different PCB layouts |
| Primary resistance RP | 0.05, 0.2, 1 | mΩ | For different PCB layouts |
| Primary insertion inductance LP | 0.025, 0.1, 0.4 | µH | For different PCB layouts |
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