Current Transducer LZSR 150-P/SP1
The LZSR 150-P/SP1 is a closed-loop, multi-range current transducer designed for the electronic measurement of DC, AC, and pulsed currents. It provides galvanic separation between the primary and secondary circuits, featuring a voltage output and unipolar supply voltage. Its advantages include very low offset drift and excellent dv/dt immunity, making it suitable for demanding industrial applications such as AC variable speed and servo motor drives, battery-supplied systems, Uninterruptible Power Supplies (UPS), Switched Mode Power Supplies (SMPS), welding power supplies, and solar inverters. The transducer offers a higher measuring range and is built to meet various international standards.
Product Attributes
- Brand: LEM
- Model: LZSR 150-P/SP1
- Certifications: UL 508, CSA C22.2 NO. 14-10, IEC 61800-3, IEC 61800-5-1, IEC 62109-1, IEC 62477-1
- Application Domain: Industrial
- Case Material: V0 According to UL 94
- Origin: LEM International SA, Meyrin, Switzerland
Technical Specifications
| Parameter | Symbol | Unit | Min | Typ | Max | Comment |
| Absolute Maximum Ratings | ||||||
| Maximum supply voltage | UC max | V | 7 | |||
| Maximum primary conductor temperature | TB max | C | 110 | |||
| Maximum primary current | IP max | A | 10 × IP N | |||
| Electrostatic discharge voltage (HBM) | UESD HBM | kV | 4 | |||
| Insulation Coordination | ||||||
| RMS voltage for AC insulation test, 50 Hz, 1 min | Ud | kV | 3 | |||
| Impulse withstand voltage 1.2/50 µs | UNi | kV | 8 | |||
| Insulation resistance | RINS | GΩ | > 200 | measured at 500 V DC | ||
| Partial discharge RMS test voltage | Ut | kV | 1650 | (qm < 10 pC) | ||
| Comparative tracking index | CTI | 600 | ||||
| Case material | - | V0 | According to UL 94 | |||
| Clearance (pri. - sec.) | dCI | mm | 12.9 | Shortest distance through air | ||
| Creepage distance (pri. - sec.) | dCp | mm | 12.9 | Shortest path along device body | ||
| System voltage RMS (Reinforced insulation) | V | 600 | according to IEC 61800-5-1, IEC 62109-1 CAT III, PD2 | |||
| System voltage RMS (Basic insulation) | V | 1000 | according to IEC 61800-5-1, IEC 62109-1 CAT III, PD2 | |||
| Environmental and Mechanical Characteristics | ||||||
| Ambient operating temperature | TA | °C | -40 | 85 | ||
| Ambient storage temperature | TA st | °C | -55 | 125 | ||
| Mass | m | g | 44 | |||
| Electrical Data (At TA = 25 °C, UC = +5 V, NP = 1 turn, RL = 10 kΩ unless otherwise noted) | ||||||
| Primary nominal RMS current | IP N | A | 150 | * | ||
| Primary current, measuring range | IP M | A | -450 | 450 | * | |
| Supply voltage | UC | V | 4.75 | 5 | 5.25 | * |
| Current consumption | IC | mA | 8 + ISP N/1277 | 10 + ISP N/1277 | * (NS = 1277 turns) | |
| Reference voltage @ IP = 0 A | Uref | V | 2.485 | 2.5 | 2.515 | |
| Output voltage | Uout | V | 0.25 | 4.75 | with UC = +5 V | |
| Output voltage @ IP = 0 A | Uout | V | Uref | |||
| Electrical offset voltage | UO E | mV | -2.5 | 2.5 | 100 % tested | |
| Electrical offset current referred to primary | IO E | mA | -600 | 600 | 100 % tested | |
| Temperature coefficient of UO E | TCUO E | ppm/K | -10 | 10 | * | |
| Temperature coefficient of Uref | TCUref | ppm/K | ±100 | Internal reference | ||
| Temperature coefficient of Uout @ IP = 0 A | TCUout | ppm/K | ±3 | * ppm/K of 2.5 V | ||
| Nominal sensitivity | SN | mV/A | 4.166 | 625 mV/IP N | ||
| Sensitivity error | εS | % of IP N | -0.8 | 0.8 | 100 % tested | |
| Temperature coefficient of S | TCS | ppm/K | 75 | * | ||
| Linearity error | εL | % of IP N | -0.10 | 0.10 | ||
| Magnetic offset current (10 × IP N) referred to primary | IO M | mA | -156 | 156 | ||
| Noise voltage spectral density (100 Hz … 100 kHz) | uno | µV/√Hz | 0.92 | |||
| Peak-to-peak noise voltage (DC … 10 kHz) | Uno pp | mVpp | 0.2 | |||
| Primary current, detection threshold | IP Th | A | 2.59 × IP N | 2.72 × IP N | ||
| Delay time of threshold output for high value | tD H | µs | 1.4 | 2.2 | * Overcurrent detection measured over temperature | |
| Delay time to 10 % of the final output value for IP N step | tD 10 | µs | 1 | di/dt = 50 A/µs | ||
| Delay time to 80 % of the final output value for IP N step (11x20.5mm busbar) | tD 80 | µs | 2.2 | di/dt = 50 A/µs | ||
| Delay time to 80 % of the final output value for IP N step (2x15mm busbar) | tD 80 | µs | 2.2 | di/dt = 50 A/µs | ||
| Frequency bandwidth (±3 dB) | BW | kHz | 200 | |||
| Total error | εtot | % of IP N | 1 | See formula note 2) | ||
| Total error @ TA = 85 °C | εtot 85 | % of IP N | 1.4 | See formula note 2) | ||
| Sum of sensitivity and linearity error | εS L | % of IP N | 0.83 | See formula note 3) | ||
| Sum of sensitivity and linearity error @ TA = 85 °C | εS L 85 | % of IP N | 1.2 | See formula note 3) | ||
2410121745_LEM-LZSR150-P-SP1_C5891312.pdf
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