COBHAM EXPLORER 325 Installation Manual page 22

3.2.2 To measure the source impedance
Select a power outlet from the 24 V DC or 12 V DC system, and measure the source
impedance of the installation as described below.
1. Measure the voltage without load (R.var disconnected).
2. Set the current to e.g. 1 A by adjusting R.var.
3. Measure the corresponding voltage change.
Example:
Battery 12/24 V DC
Battery 24 VDC
98-131306-B
1 A and 50 mV. Source impedance: 50 mV/1 Amp = 50 m.
Ship Installations
Vehicle installations
Power cable selection
Chapter 3: To connect power
Power outlet
BDU Power
for terminal
outlet
A
V
R.var
14