Product Overview
The LEM TT 50-SD is a split-core AC current transformer designed for the electronic measurement of AC waveform currents. It provides galvanic isolation between the primary and secondary circuits, making it suitable for applications requiring accurate current measurement and monitoring. Key features include a 8 mm sensing aperture, cable output, and an isolated plastic case recognized according to UL 94-V0. This transducer offers high accuracy, low phase shift, and high isolation, making it a cost-effective and easy-to-install solution for energy and automation sectors. Applications include power meters, energy sub-meters, power quality monitoring, condition monitoring of motor loads, and distributed measurement systems.
Product Attributes
- Brand: LEM
- Model: TT 50-SD
- Type: Split core transducer
- Sensing Aperture: 8 mm
- Output: Cable (1m)
- Case Material: Isolated plastic case recognized according to UL 94-V0
- Protection Degree: IP40
- Certifications: IEC 61010-1 standards (Reinforced isolation, CAT III, PD2)
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Primary nominal current (rms) (IPN) | 50 | A |
| Output current (IOUT) | 16.66 | mA |
| Output clamping voltage (VSZ) | 7.5 | V |
| Overload capability - continuous | 100 | A |
| Overload capability - 1 min | 1200 | A |
| Overall accuracy @ IPN, TA = 25C | < 1 | % |
| Linearity error (L) | 0.1 | % |
| Temperature coefficient of IOUT (TCIOUT) | 60 | ppm/K |
| Phase shift () | 1.5 1 | |
| Frequency bandwidth (BW) ( 1dB) | 50/60 | Hz |
| Ambient operating temperature (TA) | -25 .. +70 | C |
| Ambient storage temperature (TS) | -30 .. +90 | C |
| Mass (m) | 80 | g |
| Rated isolation voltage rms (Vb) 1) | 300 | V |
| Rms voltage for AC isolation test (Vd), 50Hz, 1min | 3.5 | kV |
| Impulse withstand voltage (Vw) 1.2/50ms | 6.5 | kV |
| Creepage distance (dCp) | 6 | m |
| Clearance distance (dCl) | 6 | m |
| Comparative tracking index (CTI) (Group I) | 600 | |
| Primary aperture diameter | 8 | mm |
| Output cable length | 1000 | mm |
| General tolerance | 1 | mm |
2411220608_LEM-TT-50-SD_C5807419.pdf
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