Wiring And Connection - JinkoSolar JKM M-72 Series Installation Manual

3. Wiring and connection

a) Before this procedure, please read the operation instructions of the PV system
carefully. 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 JKM190M-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 (M) can be easily calculated by dividing
the maximum rated current (indicated in the electrical specification below) 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.
For example: with JKM190M-72 modules (the maximum rated current is 10A) the
maximum parallel modules configuration number should never exceed M= 2
(10A/5.56A+1=2.8).
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 4mm
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 is 105℃
e) All module frames and mounting racks must be properly grounded in accordance
2
- 22 -
and the rated current of