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Test set up DIPS, Interruption
Ports which must be tested:
AC / DC power supply
Coupling path:
These disturbances appear on the power lines. Disturbance sources are short circuits between power lines,
power line switching actions and heavy load changes etc.
Legende: P Generator, Kraftwerk
Z(N) Impedanz Nulleiter
Z(L) Impdeanz Phase
L1 Gerät, Last Numm er 1
L2 Gerät, Last Numm er 2
L3 Gerät, Last Numm er 3
F1 Sicherung Phase
F2 Sicherung im Gerät 1
Kurzschluss in der Last 1
figure 5.4.4.1
Test set-up:
• During DIPS test remember that high inrush currents are possible during the turn on phase of the DIPS.
• With switched power supplies the current can increase linearly with the voltage reduction e.g. I= 1A at U
230V, and with reduced voltage of U = 40%, the current increases to 2,5 A.
• For a realistic DIPS and interruption test, the test object must be discharged using the power line
impedance, see Chapter 3.4.
Test Level
% U
T
Voltage
Dip/int
% U
T
Duration
(in period)
0 100 0.5*
5
10
40 60 25
50
x
70 30
Prüflevel : Spannungsunterbrüche
U
T
Test Level 70%
Dip 30%
figure 5.4.4.2
Begin of the interruption
End of the interruption
5
1
10 t period
Short circuit at load 1
Legend:
P Power generator
Z(N) Impedance neutral
Z(L) Impedance Phase
L1 Load 1
L2 Load 2
L3 Load 3
F1 Power line fuse
F2 Equipment fuse
Test levels, Voltage interruption
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