A 1513 Discharge Link
Working with A 1513
5
3.3 Example of discharging time
Device under test (DUT) was charged to
U
0
and has an internal capacity of
C
0
.
How fast will the A 1513 discharge the internal capacity of the DUT to the safe voltage
value (
U
DUT
< 50 V)?
Discharging resistance
R
0
of the A 1513 is 100 k
.
V
e
V
U
F
C
R
s
t
DUT
U
0
0
0
DUT
Charged to
At time
t
the voltage on DUT is:
Voltage (U
0
)
Capacity (C
0
)
t
= 0,2 s
t
= 0,5 s
t
= 1,0 s
t
= 2,0 s
t
= 5,0 s
Example 1
10 kV
1 µF
1,3 kV
67,3 V
0,45 V
0,0 V
0,0 V
Example 2
5 kV
10 µF
4,1 kV
3,0 kV
1,8 kV
676 V
33,7 V
Example 3
1 kV
15 µF
875 V
716 V
513 V
263 V
35,6 V
1.0
10.0
100.0
1000.0
10000.0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
D
is
ch
ar
ge
V
o
lt
age
(
V
)
Discharge time (s)
Discharge voltage vs Discharge time
Example_1
Example_2
Example_3
Safe voltage mark (50 V)
Figure 3.3: Examples of discharging time
