Eltek Valere Theia He-t Instalační příručka stáhnout pdf (Strana 19)

Installation Guide THEIA HE-t String Inverters 357115.033, Issue 2.0, 2011 March 19

2.3.3.3. Connection Procedures

• The DC conductors connecting the PV array to the inverter must each have a minimum

rating of 600Vdc at all given operating temperatures.

• The DC conductor cables must be sized for correct temperature rating and sunlight

resistance. Use copper wire with a maximum cross-section area of between 6 to16 mm

/ 10

to 6 AWG and temperature rating 90° C /194° F for all connections. Ensure compliance

with the relevant national electrical regulations!

• 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!

String Connectors Cable Glands

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.

NOTICE

Only valid for France: Removal of the

connectors requires a special tool. Note the

relevant national electrical regulations!

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:

• Terminal blocks: 1.5 Nm / 1.11 ft-lbf.

• 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.

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Eltek Valere Theia He-t Instalační příručka Strana 19