Dusol DS72W Manual do utilizador - Página 9

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DUSOL Solar Photovoltaic module

MADE IN DUBAI

5. Wiring and connection

a) Make wiring by Multi-connecting cables between the PV modules in series or parallel

connection, which is determined by user's configuration requirement for system power, current

and voltage.

b) PV module connected in series should have similar current. Modules must not be connected

together to create a voltage higher than the permitted system voltage(1000VDC), as reference the

maximum number of modules in series (N) can be easily calculated by dividing the Maximum

System Voltage of the modules by the respective Voc value of the module. Any more please

always take into consideration the variation of the voltage under different temperatures, the Voc

of the modules will be rise when the temperature drops.

For example: with DS72300M-72 modules (Max. System voltage is 1000V) the maximum series

modules configuration number should NEVER can exceed N= 22 (1000V/45.2V = 22.1)

c) PV module connect in parallel should have similar voltage. As reference the maximum number

of modules in parallel can be easily calculated by dividing the maximum rated current (indicated

in the electrical specification) by Isc value of the module, and then plus 1. Any more please

always take into consideration the variation of the current under different temperatures, the Isc of

the modules will be rise when the temperature goes up.

d) Open the connection box of the control system and connect the cabled from the PV arrays to

the connection box in accordance with the installation indication of the PV control systems. The

cross-sectional area and cable connector capacity must satisfy the maximum short-circuit of PV

system (For a single component, we recommended the cross-sectional area of cables is 4mm2

and the rated current of connectors is more than 10A), otherwise cables and connectors will

become overheating for large current. Please pay attention: the temperature limit of cables is

85℃ and the temperature limit of connector 105℃)

e) All module frames and mounting racks must be properly grounded in accordance with local

and national electrical codes. Attach the equipment grounding conductor to the module frame

using the hole and hardware provided. Note that a stainless steel star washer is used between the

ground wire and the module frame. This washer is used to avoid corrosion due to dissimilar

metals. Tighten the screw securely.

f) These modules contain factory installed bypass diode .if these modules are incorrectly

connected to each other, the bypass diodes, cable or junction box may be damaged.