Symmetric DC Artificial Mains Network (LISN PVDC)
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The symmetrical DC artificial mains network LISN-PVDC8301, when used in conjunction with LISUN EMI-9KB or EMI-9KA EMI receivers, enables measurement of disturbance voltage in the 0.15 MHz to 30 MHz frequency range for photovoltaic inverters. This unit is engineered in compliance with CISPR 16-1-2 standards specifically for measuring conducted emissions at the DC power terminals of photovoltaic inverters.
Photovoltaic inverter circuit topologies frequently generate ripple currents on the DC side of the inverter, typically proportional to the power frequency. These ripple currents propagate through cabling and photovoltaic generator modules, potentially acting as magnetic field radiation sources that can cause significant electromagnetic interference (EMI). Conventional conducted emissions measurements at AC terminals of photovoltaic inverters fail to detect these specific interference phenomena.
The LISN-PVDC8301 is specifically designed to measure all categories of disturbance voltages at the DC-side terminals of photovoltaic inverters. This includes: unsymmetrical disturbance voltage (single conductor relative to reference ground), asymmetrical disturbance voltage (common mode disturbance of conductor pairs relative to ground), and differential mode voltage between two conductors.
Technical Specifications
- Frequency Range: 0.15 MHz – 30 MHz
- Maximum DC Current: 200 A
- Maximum DC Voltage: 1500 V
- Common Mode Impedance: (150 ± 30) Ω (Mode switch CM, A or B)
- Differential Mode Impedance: (150 ± 30) Ω (Mode switch DM)
- Phase at EUT-Terminals: (0 ± 40)°
- Insertion Loss (EUT – AE): >20 dB
- Longitudinal Conversion Loss (LCL): >26 dB
- Voltage Division Factor at Measuring Port: (20 ± 3) dB (10:1 ratio)
- DC Resistance with Feed Terminals Shorted (T=25°C): <50 mΩ
- EUT Connectors: M12 terminals with banner socket
- Dimensions: 42 × 28 × 44 cm
- Weight: Approximately 33 kg
Figure 1: Common Mode Impedance Diagram
Figure 2: Common Mode Phase Diagram
Figure 3: C-end (Common Mode) Attenuation Coefficient Diagram
Figure 4: D-end (Differential Mode) Impedance Diagram
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