common-mode voltage (electronics)

Definition:

Common mode voltage is the RF voltage between the electrical midpoint of the two wires and the reference ground, or under the specified terminal impedance conditions, the effective RF voltage (vector sum of asymmetrical voltages) of the whole bundle of wires relative to the reference ground measured by a current clamp (current transformer) on a bundle of wires. Note: See 161-04-09 in GB/T4365-2003.

Alias:

Common mode voltage is also called asymmetric voltage, life is common fire wire to ground, zero line to ground are asymmetric cable, there are coaxial cable is also asymmetric cable, the voltage between them is also called common mode asymmetric voltage.

English abbreviation:

CM

Commonly used common mode voltage test instruments:

• V-AN artificial network  Δ-type AN artificial network
• Voltage probe
• current probe
• Coupling decoupling network