Bedienungsanleitung Gossen Metrawatt SECULIFE ST HV (Seite 24 von 72) (Englisch)

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24 GMC-I Messtechnik GmbH

10.3 High-Voltage Test (Feature F02 or SECULIFE ST HV)

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 SECULIFE ST

HV.

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.

Connection

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.

Safety class I:

The test is conducted bet-

ween the short-circuited

mains poles L-N and the

protective conductor PE of

the test socket.

If safety class II is recog-

nized, the test is conducted

between the short-circuited

conductors L-N of the test

socket and the probe (con-

nection 4-5).

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) are not connected dur-

ing 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.

DUT

SC I

0.5 ... 6 kV

DUT

SC II

0.5 ... 6 kV

Probe

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