EFT/ Burst Generator PEFT Junior
29
5.5.2 Single phase "on line" system
The objective of such a system, is to conduct several EMC tests on the EUT's single phase
mains without powering off the EUT.
The following example, using a PEFT Junior and PSURGE 4.1, enables the superimposition of
EFT / burst and surge without interrupting the EUT power.
The BYPASS function of the PSURGE 4.1 delivers a continuous power supply to the EUT and
ensures the EFT / burst is not affected by coupling elements in the PSURGE 4.1 filter.
It is recommended the test system be connected as follows, EFT / burst, then surge, then EUT.
In this configuration, the attenuation requirements of IEC 1000-4-5 are satisfied.
HAEFELY
CONTROL UNIT
HAEFELY
PEFT.1 PEFT.1
HAEFELY
CONTROL UNIT
HAEFELY
PPD.1
HAEFELY
PSURGE 4.1
FILTER
OPEN
BY-PASS
INPUT
SAFETY SWITCH
16A 250V
L
PE
N
OUTPUT
OUTPUT
Fig. 5.5.2
5.5.3 Three phase "on line" system
This is the same as for the single phase system, except the generators are connected to their
respective three phase coupling filters.
FILTER
OPEN
BY-PASS
INPUT
SAFETY SWITCH
32A 690V
COUPLING
HAEFELY
F P -E FT 32.1
POWER
ON/OFF
L1
L2
L3
N
PE
DIRECT OUTPUT
INPUT
HAEFELY
CONTROL UNIT
HAEFELY
PEFT.1
LINE INPUT
LINE OUTPUT
GND
EUT
PEFT Junior
FILTER
OPEN
BY-PASS
INPUT
SAFETY SWITCH
32A 690V
COUPLING
HAEFELY
FP-SURGE 32.1
POWER
ON/OFF
HIGH
COMMON
L1
L2
L3
N
PE
18 uF
9 uF
10 R
DIRECT OUTPUT
INPUT
HAEFELY
CONTROL UNIT
HAEFELY
PPD.1
HAEFELY
PSURGE 4.1
FILTER
OPEN
BY-PASS
INPUT
SAFETY SWITCH
16A 250V
L
PE
N
OUTPUT
OUTPUT
HAEFELY
LINE INPUT
LINE OUTPUT
GND
L2
L3
N
PSURGE 4.1
Fig. 5.5.3