BYD M6C-30, Installation Manual And User Manual

Page: 18 / 30

BYD COMPANY LIMITED Rev. 21.12 2018
Document Installation Manual and User Manual for BYD Project No. \
Code 2M SOP0007540 Edition 13 Page 18 / 30
18
BYD ***P6-30/P6K-30
≤
31
BYD ***M6-30/M6K-30
≤
30
BYD ***P6-36/P6K-36
≤
26
BYD ***M6-36/M6K-36
≤
24
PHK-30
≤
31
PHK-36(1992)
≤
26
PHL-36(1948)
≤
26
And the electrical characteristics are /- 10% of the indicated
values of Isc, Voc, Pmax under STC.
Ad ditionally, there is an equation for calculating the modules
amount in one string. It also depends on the system voltage and the
lowest temperature in latest 40 years. The equation is below,
 
1 25
oc system
N V T V 
 
    
 
 
 
Here
：
N---means the module’s amount;
V
oc---
means the module’s voltage under STC;
β
---means the voltage temperature coefficient;
T---means the lowest environment temperature in latest 40
years;
V
system
---means the system voltage of the module.
(6)For parallel connection, the current will be added up and the
used connectors will be limited by the number of parallel connection.
We recommended the maximum number of modules is 3. The fuse
protection needs to be determined as well.
(7)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. Please note
that the upper limit temperature of cable is 90°C and that of the
connector is as follows:
Connector Type The upper limit temperature
PV-SKT4/xy & PV-KBT4/xy
（
For 1000V
）
105
℃
05-1
、
05-6
（
For 1000V
）
100
℃
ZH202
（
For 1000V
）
100
℃
TS02
（
For 1000V
）
100
℃
TS01
（
For 1100V/1500V
）
100
℃
ZH202B
（
For 1100V/1500V
）
100
℃
(8)There is no general limitation on the number of parallel
connected modules but the number of modules is determined by
system design parameters such as current or power output. Every PV
array in parallel should install a protection circuit.
(9) Please refer to local laws and regulations to determine the
system wires size, type and temperature. To prevent the cables and the
connectors from overheating, the cross section of the cables and the