Eltek Valere Theia He-t User Manual page 32

Connection Procedures
• The DC conductors connecting the PV array to the inverter must each have a minimum
rating of 600 V at all given operating temperatures. See
DC
maximum allowed DC voltage.
• The DC conductor cables must be sized for correct temperature rating and sunlight
resistance. Use copper wire with a cross section area between 6-16 mm
temperature rating of 90 °C/194 °F for all connections. Ensure compliance with the relevant
local and national electrical regulations!
String Connectors
The corresponding 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!
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.
32
Cable Glands
Use cables with an overall diameter between
5 mm and 9 mm to be able to seal the gland
locknut properly.
Unscrew the gland locknut and guide the
cables through the opening.
Connect the conductors to the corresponding
terminals in the Stringbox / connection area
according to the PV system grounding used.
Tightening torque:
• With terminal blocks: 1.5 Nm / 1.11 ft-lbf.
• With ring terminals: 2.0 Nm / 1.48 ft-lbf.
Pull the conductors gently to ensure that they
are firmly tightened, and then tighten and
seal the cable gland.
User Manual THEIA HE-t String Inverters
NOTICE! on page 24 regarding
2
/10-6 AWG and
357115.013, Issue 1.0, 2011 March