3 Phase - Line Impedance Stabilization Network for MIL-STD 461

• The LI-3P-4x Series consists of four separate models of four-conductor, 50Ω, 50 μH Line Impedance Stabilization Networks (LISNs). The primary differences between the four models are their respective current ratings:

           LI-3P-416     16 Amps (per line, continuous)
           LI-3P-432     32 Amps (per line, continuous)
           LI-3P-463     63 Amps (per line, continuous)
           LI-3P-4100   100 Amps (per line, continuous)

• These LISNs provide the necessary measurement platform for performing power line conducted emissions compliance testing per MIL-STD-461, CE102, conducted emissions, radio frequency potential, power leads. The LISNs perform the following functions:
• Provide a defined, stable power line impedance across its frequency range for the Equipment Under Test (EUT);
• Isolate the EUT and measurement circuit from the power source, thereby minimizing its influence on the measurements; and,
• Couple the disturbance voltages to the coaxial measurement port, which connects to the measuring instrument.

• The LISNs use air-core inductors to prevent saturation and permeability variation.
• The mounting plates are left unpainted in order to facilitate connection to earth ground in their installation, which is essential due to high leakage currents.
• The side panels for each LISN are louvered for cooling purposes. The LI-3P-463 and LI-3P-4100 also include two internal cooling fans operated by a switch on the rear panel.