Danfoss DLX 4.6 Betriebsanweisung PDF herunterladen (Seite 28)

28 User Guide DLX Series L00410623-1

• Conductor insulation rating must be higher where the backs of the modules cannot

receive cooling or where the ambient temperature exceeds 40° C. Note the relevant

national electrical regulations!

• Follow the safety instructions and specifications from the module manufacturers

regarding installation.

String Connectors

• The corresponding mating connectors must be provided by the system installer.

• Follow the guidelines from the connector manufacturer when choosing cable sizes and

assembling them in the connectors.

• Plug in the connectors and hand-tighten them to the corresponding connector on the

inverter.

• Check if the contacts are firmly tightened by pulling them gently.

• Only valid for France: Removal of the connectors requires a special tool. Note the

relevant national electrical regulations!

4.3.4.5. Reversed DC Connection

If the positive and negative conductors are connected to the wrong terminals, the inverter

will not start up. The inverter is not damaged due to internal reverse blocking diodes, but

high currents are generated in the conductors.

DANGER

Be aware of high currents! If the DC terminals are mixed up during connection,

high currents are generated in the conductors, which can pose shock hazards.

Procedure

• Turn OFF the DC switch(es) and the AC circuit breaker(s).

DANGER

The PV conductors are still charged after the DC switch in the Stringbox is turned

OFF, due to power fed from the PV modules. Always turn OFF the remote DC

switch and wait until the PV modules do not feed power.

• Remove the PV connectors.

• Check with a voltmeter if the terminals are discharged.

• Disconnect the conductors from the terminal block.

• Connect the conductors to the correct terminal block.

• Test the polarity using a voltmeter before turning ON the DC switch(es) and the AC

circuit breaker(s).

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Danfoss DLX 4.6 Betriebsanweisung Seite 28