Schwarzbeck ECSS LISN 2 - 75A Double Path AMN (LISN)

The ECCSS LISN 2 – 75A was developed following the "European Cooperation for Space Standardisation". The ECSS LISN is used for DC mains lines. The red wing terminal must be connected to the positive voltage, the black terminal to the negative. The impedance characteristic of each path is basically realized by an inductor in parallel with the 50 Ω resistor: 2 µH || 50 Ω.

The device under test has to be connected to the terminals at the front panel. The supply voltage has to be connected to the back panel.

The device under test may drain a continuous current of 75 A and for a short period of time it may even drain more than 100 A.

Principle Circuit Diagram of the ECSS LISN 2

Attention:

The built in capacitors are electrolytic so the correct polarity is a MUST!

With a high continuous current the LISN housing heats up to approx. 60°C at the front panel. The operator must be aware of high temperatures.

A sufficient air-circulation must be provided to avoid overheating of the LISN.

The LISN must not be covered by all means to provide good air ventilation.

A light smell of coating and insulating material may appear in the first hours of operation. Ensure proper ventilation of the test rooms. The smell will reduce after few hours of operating.

The impedance between plus /minus EuT-Terminal and the metal enclosure of the LISN
(Calibration Adapter KA ECSS required)

Impedance between EuT Terminals, differential mode
(between plus and minus terminals, short circuit between mains terminals)