Copyright CPS America Co., Ltd. Page 37
proper rating of fuse for DC protection. And the size of the DC
and AC wiring must to meet with the required size of cables as
description at chapter H) DC input terminal block and chapter J)
AC output terminal block in the section 6.2.
G. DC Input Terminal Block
It is the terminal block that is used to connect the DC cables from the PV
modules. In order to have a trouble free connection, it is recommended to
connect PV modules of the same type, same quantity, with an identical
configuration of strings.
However,
the size selection of DC cables should be referred to cable
size requirement in the National Electrical Code(NEC), ANSI/NFPA 70
in order to select the proper size of DC cables that can be used with the
PV inverter.
H. Protection MOV for AC Output Side
It is the surge protection that is used to protect the output circuit against
excessive voltage of the AC connections.
I. AC Output Terminal Block
It is the terminal block that is used to connect AC cables from the utility
system, also known as the public grid. Each model of the Eaton grid-tied
PV Inverter requires different sizes of AC cables. The following table
indicated the cable size and torque values that are required for position (1)
pole / position (2) pole / position (3) pole in the AC terminal block when a
208 grid-tied PV system is applied with the PV inverter:
Table 6.2.3: Standard AC Cables
Model
Terminal block
CPS
SCE4KTL-O/US
CPS
SCE5KTL-O/US
CPS
SCE6KTL-O/US
CPS
SCE7KTL-O/US
Terminal block
labeled with (1),
(2), (3)
Admissible
conductor size
10 AWG
8 AWG
6 AWG
90
o
C / 194
o
F, Copper
Torque value
15.6 lbf-in (18 Kgf-cm)
33.1 lbf-in (38.1 Kgf-cm)
Terminal block
labeled with (G)
Admissible
conductor size
10AWG
Torque value
15.6 lbf-in (18 Kgf-cm)
33.1 lbf-in (38.1 Kgf-cm)
