The LISN (Line Impedance Stabilization Network) or AMNs (Artificial Mains Networks) is a device to create a known impedance on power lines of electrical equipment during electromagnetic interference testing. A LISN is typically designed to allow for measurements of the electromagnetic interference existing on the power line.
It fulfills three main functions:
- It filters the mains voltage and should block higher frequencies than the mains frequency.
- It should provide a characteristic impedance to the device under test (DUT).
The conducted interference voltage produced by the DUT is transferred to a meter, for example, a spectrum analyzer or an EMI receiver.
A LISN is basically a very large and effective “Pi-type” electrical noise filter[3] used in the design and measurement of electronic equipment to meet formal specifications such as the “CE” marking. The LISN is supposed to keep unwanted conducted noise from coming in on the power mains and tainting measurement of the DUT, and it is also supposed to keep noise generated by the DUT from escaping back into the power mains. The purpose is to allow accurate measurement of noise generated by the DUT using, usually, a broadband spectrum analyzer.
GTEMCELL produce a wide range of models: mono-phase 250V and three-phases 400V 50/60Hz for currents 10-16-25-32-64A, higher current available on demand.
Main Characteristics
- Frequency range: 150kHz a 30MHz
- Measurements with switchable positions: OFF, ON live and neutral lines
- Models with continuous mono-phase, three-phases, 10-16-25-32-64A power output.
- On/Off transient/ surge protection.
- Filter network according to CISPR16-1 for band B.
- RF Out: BNC connector, 50 Ohm, switchable CM, and DM mode
- Compact, the light unit for bench use.
- Ambient Temperature operating range: 0÷55°C
- Safety: according to IEC 348, except high current leakage to ground.
- Storage temperature: -40÷70°C