Operation Manual

24 GMC-I Messtechnik GmbH
10.3 High-Voltage Test (Feature F02 or SECUTEST SIII+H)
Only safety class I and II devices can be tested, which can be connected
to the test socket.
The high-voltage test is performed with direct voltage. In order to comply
with requirements for alternating voltage, testing is performed with 1.5-
fold direct voltage. This multiplier is applied automatically during testing. A
selected nominal voltage of 3.5 kV thus results in a DC output voltage of
5.25 kV.
Output voltage is measured for the entire duration of the test, and its min-
imum value is determined. The minimum voltage value is indicated as the
test result. If this value is less than the pre-selected test voltage, the test is
failed.
The conversion factor must be taken into consideration for testing and
calibration of the SECUTEST SIII+H.
The device is designed such that special measures in accordance with
DIN VDE 0104 (high-voltage test) need not be observed.
This is accomplished by means of the following characteristics:
1. Continuous short-circuit current is less than 3 mA (DC).
2. Discharge energy (at 5.25 kV) is less than 350 mJ.
In order to comply with high-voltage test regulations despite the minimal
continuous short-circuit current, the charging capacitors are connected to
the test socket (L, N) with relatively low-value protective resistors. This
results in a peak short-circuit current value of approximately 5 A (at 5 kV),
which causes plainly audible and visible sparking.
High-voltage testing can only be performed via the test socket. The pro-
tective conductor at the socket is grounded during the high-voltage test.
Caution: High-Voltage!
Touc h neither the test socket nor the device under test during
voltage testing!
A high-voltage of up to 5.5 kV is present at the test socket output!
A current may flow over your body, and although it does not
reach life endangering levels, the resulting shock is plainly
discernible.
Previous testing of the protective conductor is absolutely essential
for safety class I devices because if the protective conductor is in-
terrupted, the high-voltage test does not charge all dielectric ma-
terial and the scope of testing is thus insufficient.
Connection
õ Insert the mains plug from the device under test into the test socket.
õ Safety class II: Connect the probe to jacks 4 and 5.
Attention!
!
Make sure that the application parts (18) (Feature J01) are not
connected during high-voltage testing!
Individual Test
õ Set the rotary selector switch to the Iso/HV position.
õ Select the U-HV menu with the key and acknowledge with the
key.
õ If the device under test has not yet been switched on, a message to
this effect appears at the display. Nominal voltage is then selected.
õ Select the desired nominal voltage
from the display with the key.
The instrument multiplies this nomi-
nal voltage by a factor of 1.5, which
represents the actual test voltage
(see chapter 10.3).
Note: For SC I, the test voltage can
be set to maximum 1.5 kV.
õ Test voltage is applied to the test
socket, and in turn the device under
test, for as long as the
key is
held depressed. Activation of high-
voltage is indicated with an acoustic
signal.
Currently measured minimum output voltage U
HV AC
(measured value
divided by 1.5), test voltage U
DC
, and remaining test time are displayed.