Characteristics

TPI

4/9

Figure 5.

Reference test circuit 1

Figure 6.

Auto

Transformer

220 V / 2 A

tp = 20 ms

R2

R1

140

Ω

240

Ω

Static

relay

IBO,IH

measure

VBO

measure

VOUT

D.U.T.

K

Transformer

220 V / 800 V

2 A

TEST PROCEDURE

Pulse test duration (tp = 20 ms):

V

selection:

●

●

●

●

for Bidirectional devices = Switch K is closed

for Unidirectional devices = Switch K is open

Device with V

< 200 V

V

= 250 V

, R1 = 140

OUT

BO

OUT

RMS

➔

Ω

Device with V

> 200 V

V

= 480 V

, R2 = 240

BO

OUT

RMS

➔

Ω

R

V

Surge generator

D.U.T.

TEST PROCEDURE

1/ Adjust the current level at the IH value by short circuiting the AK of the D.U.T.

2/ Fire the D.U.T. with a surge current

➔ I

10 A, 10/1000 µs.

3/ The D.U.T. will come back off-state within 50 ms maximum.

PP

This is a GO-NOGO test which allows to confirm the holding current (I ) level in a

functional test circuit.

H