CORAB ENCOR Manuel d'installation - Page 8

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Electrical installation

■ To avoid galvanic corrosion, all components used must

be compatible with the module material. Damages caused

by galvanic corrosion are not cover under the warranty.

■ It is not recommended to use modules with different

configurations (grounding, wiring) in the same system.

■ Excessive cables must be organized or fixed in an

adequate way, e.g. attached to the mounting structure by

using non-metallic cable ties or other suitable ties. Solar

cables, connectors and junction boxes should not be

exposed to water and snow, and rain or water submersion

for a long period of time (IP65/67/68).

■ For applications requiring high operating voltage several

modules can be connected in series to form a string of

modules; the system voltage is then equal to the sum of

the voltage of each module.

■ For applications requiring high operating currents

several strings of modules can be connected in parallel;

the system current is then equal to the sum of the current

of each string of modules.

■ The maximum system voltage is 600 volts, 1000 volts or

1500 volts depending on the product family direct current

value according to standards.

■ The maximum number of series of connected modules

depends on the system design, type of inverter used and

environmental conditions.

■ Based on the maximum series fuse rating of module and

local electrical installation code, always make sure that PV

modules are assembled with the appropriate string fuse

for circuit protection. There is no specific limitation on the

number of modules that can be connected in parallel, the

number of modules is determined by system design

parameters such as current or power output.

■ To prevent the cables and the connectors from

overheating, the cross section of the cables and the

capacity of the connectors must be selected to suit the

maximum system short circuit current. The recommended

cable is PV wire with a cross section of at least 4 mm

■ Caution: do not secure the cables too tight. Any cable

damage caused by cable management system is not

covered under module warranty.

■ Always observe the bending radius specified by the cable

manufacturer, which includes the radius after the

connectors.

■ When designing large modules arrays connected to a

single inverter, always take into account the resulting

isolation resistance (Riso), which decreases with an

corab.pl

Installation manual

and safe operation instructions

of photovoltaic modules ENCOR

[ Does not apply to BIFACIAL modules]

increase in the number of modules in the array. A too low

Riso can results in inverter faults. Please read local

regulations to determine the wire size, type and

temperature.

■ The modules are supplied with connectors used for

system electrical connections. It is strongly recommended

to use the original connectors specified in the module data

sheet. Selecting a connector type other than those

specified may invalidate the warranty.

■ To ensure reliable electric connection and to prevent

possible intrusion of humidity, two connectors must be

mated and locked together until a click can be heard.

■ Long-term exposure to wet environments may cause

connectors' poor connectivity, resulting in current leakage

and poor conductivity which voids the warranty. Proper

management of connector/cable/wire is recommended to

prevent moisture intrusion. Depending on the amount of

humidity, it is recommended to conduct periodic

inspections of the installation system to maintain optimal

module performance.

■ The DC current generated by photovoltaic systems can

be converted into AC current and fed into a public grid. As

local public utility policies on connecting renewable

energy systems to the grids vary from region to region,

always seek the advice from a qualified system designer.

Building permits, inspections and approvals by the local

utility facilities are generally required.

■ For larger installations, it is recommended to instal

lightning protection following the local requirements and

regulations.

Grounding

For grounding and connecting requirements, please refer

to regional and national safety and electricity standards. If

grounding is required, use a recommended connector type

for the grounding wire.

PV Modules use an anodic oxidized aluminium frame to

resist corrosion, so the module frame should be connected

to the system grounding wire to prevent thunder and

electrical shock.

The frame rails have pre-drilled holes marked with

a grounding sign, these holes should be used for

grounding purposes and should not be used for

mounting the modules.

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