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LF210-S Arkusz danych(PDF) 5 Page - LEM |
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LF210-S Arkusz danych(HTML) 5 Page - LEM |
5 / 7 page Page 5/7 26October2015/Version 5 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com LF 210-S 50 100 150 200 250 300 350 400 450 0 50 100 150 200 250 Ip (A) 200 A, 73 Ω 200 A, 102 Ω Rmax Uc= 11.4 V @ 70 °C Rmax Uc= 14.25 V @ 70 °C 10 0 10 1 10 2 10 3 10 4 10 5 10 6 10 7 10 −5 10 −4 10 −3 10 −2 10 −1 fc (Hz) Total RMS noise current in the frequency range [1...10] MHz Figure 1: Maximum measuring resistance I P R M max = NS − R S max− 4.1 Ω U C min − 0.3 V × Figure 3: Typical noise voltage density e no with R M = 10 Ω Figure 4: Typical total output current noise with (primary referred, rms) with R M = 10 Ω To calculate the noise in a frequency band f 1 to f2, the formula is: with I no (f) read from figure 4 (typical, rms value). Example: What is the noise from 103 to 106 Hz? Figure 4 gives I no (10 3 Hz) = 3.19 mA and I no (10 6 Hz) = 84.4mA. The output current noise (rms) is therefore: I no (f1 … f2) = I no (f2) 2 − I no (f2) 2 (46.77 × 10−3)2 − (3.11 × 10−3)2 = 46.67 mA referred to primary Figure 2: Typical step response (0 to 200 A, 75 A/µs R M = 10 Ω) Typical performance characteristics 10 0 10 1 10 2 10 3 10 4 10 5 10 6 10 7 −165 −160 −155 −150 −145 −140 −135 −130 −125 −120 −115 fc (Hz) Noise Voltage Spectral Density 50 100 150 200 250 300 350 400 450 0 50 100 150 200 250 Ip(A) 200 A, 72Ω 200 A, 100 Ω 200 A, 23 Ω Rmax Uc= 11.4 V @ 85 °C Rmax Uc= 14.25 V @ 85 °C Rmin Uc= 15.75 V @ 85 °C 0 10 20 30 40 50 60 70 Time (µs) Input 100 A /div Output 50 mA/div |
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