Dielectric strength
The output voltage is earth-free and has no ohmic connection to earth. Type and factory tests are carried out by the manufacturer. Field tests can be performed in the field using suitable test equipment that ramps up the voltage with a slow ramp (2 s rising and 2 s falling). Before performing the test, connect all phase connections and all output poles. During the test set the cut-off current to the value in the table below.
*) When checking the input to DC-OK, make sure that the maximum voltage between DC-OK and the output is not exceeded (column D). We recommend connecting the DC-OK pins and the output pins when performing the test.
| A | B | C | D | |
|---|---|---|---|---|---|
Type test | 60 s | 2500 Vac | 3000 Vac | 500 Vac | 500 Vac |
Component test | 5 s | 2500 Vac | 2500 Vac | 500 Vac | 500 Vac |
Field test | 5 s | 2000 Vac | 2000 Vac | 500 Vac | 500 Vac |
Setting the cut-off current | > 10 mA | > 10 mA | > 40 mA | > 1 mA | |
To meet the PELV requirements according to EN 60204-1 section 6.4.1, we recommend that either the positive pole, the negative pole or any other part of the output circuit is connected to the protective earthing system. This helps to avoid situations where a load starts unexpectedly or cannot be disconnected if an unnoticed earth leakage occurs.