EMC FLEX BLOG A site dedicated to Automotive EMC Testing for Electronic Modules

CISPR 25 LISN Types

The latest revision of CISPR 25 is looking into various types of Artificial Networks used in today's

The latest revision of CISPR 25 is looking into various types of Artificial Networks used in today's automotive EMC.

1. Artificial Network (AN): used for LV power supplies;
2. High Voltage Artificial Network (HV-AN): used for high voltage d.c. power supplies;
3. Direct Current charging Artificial Network (DC-charging-AN): used for d.c. power supplies;
4. Artificial Mains Network (AMN): used for a.c. power mains;
5. Asymmetric Artificial Network (AAN): used for signal/control port lines and/or wired network port lines.

1. Artificial Network (AN)

  

 

 

Measurement ports of HV-AN(s) must be terminated with a 50 Ω load. The HV-AN impedance ZPB (tolerance ± 20 %) in the measurement frequency range of 0.1 MHz to 100 MHz. This table above shows the nominal impedance and upper/lower tolerances in tabular form. It is measured between the EUT HV and ground terminals with a 50 Ω load on the measurement port and with the supply line HV and ground terminals short circuited.

2. High Voltage Artificial Network (HV-AN)

 

 

3. Direct Current charging Artificial Network (DC-charging-AN)

 

4. Artificial Mains Network (AMN)

Power mains must be applied to the vehicle through 50 μH/50 Ω AMN(s). The DC resistance between the ground of the AMN measurement port and the ground plane must not exceed 2,5 mΩ.

 

5. Asymmetric Artificial Network (AAN)

 

 

 

 

Christian Rosu

2021-06-22

 

 

 

 

Comments are closed