Ametek NetWave 3.1 - Output Impedance for IEC 61000-4-29 Testing

AMETEK CTs NetWave
7.6. Output Impedance for IEC 61000-4-29 testing
The standard IEC 61000-4-29 defines the impedance conditions of the dc source during the short interruptions
as follow:
Generator impedance defined in IEC 61000-4-29
- operate in “low impedance” condition, absorbing inrush current from the load (if any), or
- operate in “high impedance” condition, blocking reverse current from the load.
The test generator, during the generation of voltage dips and voltage variations,
shall operate in “low impedance” condition.
Preferred test levels and durations for short interruptions
Test
Test conditions
Test level
[% U
T
]
Duration
[s]
Short
interruption
High impedance
and / or
low Impedance
0
0.001
0.003
0.01
0.03
0.1
0.3
1
X
The output impedance of the NetWave generator during a short DIP or interruption is in “low impedance “. The
impedance value during this short time is approx. 10mΩ or less. During this time the power dissipation is up to
20’000W or more for absorb inrush currents in the range of some milliseconds. For more information see graphics
in the previous chapter dissipation power.