EMC-PARTNER EXTTRA3000 E, Руководство пользователя

Страница: 60 / 162

TRANSIENT3000
60/162
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.
L e g e n d e :
P G e n e r a t o r , K r a f tw e r k
Z ( N ) I m p e d a n z N u lle ite r
Z ( L ) I m p d e a n z P h a s e
L 1 G e r ä t, L a s t N u m m e r 1
L 2 G e r ä t, L a s t N u m m e r 2
L 3 G e r ä t, L a s t N u m m e r 3
F 1 S ic h e r u n g P h a s e
F 2 S ic h e r u n g im G e r ä t 1
K u r z s c h lu s s in d e r L a s t 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.
T est L eve l
% UT
V o lta g e
D ip /in t
% UT
D u ra tio n
(in p erio d )
0 10 0 0.5*
5
10
40 60 25
50
x
70 30
P rü fleve l : S p an n u ng su n terb rü c he
U
T
T e st L eve l 70 %
D ip 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