Dielectric strength
The output voltage is floating and has no ohmic connection to the ground. Type and factory tests are conducted by the manufacturer.
Field tests may be conducted in the field using the appropriate test equipment which applies the voltage with a slow ramp (2s up and 2s down). Connect all phase terminals together as well as all output poles before conducting the test. When testing, set the cut-off current settings.to the value in the table below.
B*) When testing input to DC-OK ensure that the maximal voltage between DC-OK and the output is not exceeded (column D). We recommend connecting DC-OK pins and the output pins together when performing the test.
| A | B | C | D | |
|---|---|---|---|---|---|
Type test | 60s | 2500Vac | 3000Vac | 500Vac | 500Vac |
Routine test | 5s | 2500Vac | 2500Vac | 500Vac | 500Vac |
Field test | 5s | 2000Vac | 2000Vac | 500Vac | 500Vac |
Cut-off current setting | > 10mA | >10mA | >40mA | >1mA | |
To fulfil the PELV requirements according to EN 60204-1 § 6.4.1, we recommend that either the + pole, the – pole or any other part of the output circuit shall be connected to the protective earth system. This helps to avoid situations in which a load starts unexpectedly or cannot be switched off when unnoticed earth faults occur.