TPP25011
4/7
REFERENCE TEST CIRCUIT 1 :
FUNCTIONAL HOLDING CURRENT (I
H
) TEST CIRCUIT2=GO-NOGO TEST
220V
static
relay.
R1
R2
240
140
D.U.T
V
BO
measure
I
BO
measure
tp
=20ms
K
Transformer
220V/800V
5A
Auto
Transformer
220V/2A
V
out
R
-V
P
V
BAT
=-48V
Surge generator
D.U.T.
TEST PROCEDURE :
■
Pulse Test duration (tp = 20ms):
- For Bidirectional devices = Switch K is closed
- For Unidirectional devices = Switch K is open.
■
V
OUT
Selection
- Device with V
BO
< 200 Volt
-V
OUT
= 250 V
RMS
,R
1
= 140 Ω.
- Device with V
BO
200 Volt
-V
OUT
= 480 V
RMS
,R
2
= 240 Ω.
This is a GO-NOGO Test which allows to confirm the holding current (I
H
) level in a functional
test circuit.
TEST PROCEDURE :
■
1) Adjust the current level at the I
H
value by short circuiting the AK of the D.U.T.
2) Fire the D.U.T with a surge Current : Ipp = 10A , 10/1000 µs.
3) The D.U.T will come back off-state within 50 ms max.
