7
STANDARDS
VBHNxxxSJ series comply with the re-
quirements of IEC61215, IEC61730-1,
IEC61730-2 and the CE mark.
APPLICATION CLASS OF PRODUCT
HIT
TM
are applied to application class A
and safety class II. It may be applicated in
systems operating at greater than 50
VDC or 240 W, where general contact
access is anticipated.
FIRE CLASS OF PRODUCT
The fire rating of this module is valid only
when mounted in the manner specified
in the mechanical mounting instructions.
HIT
TM
fill fire class C that provides to IE-
C61730-2. Class C roof coverings are ef-
fective against light fire test exposures.
Under such exposures, roof coverings of
this class afford a light degree of fire
protection to the roof deck, do not slip
from position, and are not expected to
produce flying brands.
JUNCTION BOX AND TERMINALS
Modules equipped with one junc-
tion box contain terminals for both
positive and negative polarity, and
bypass diodes.
One terminal is dedicated to each
polarity (with the polarity symbols
engraved onto the body of the junc-
tion box) (see Figure 2).
BYPASS DIODE
When the modules in series strings
are shaded partially, it may cause
reverse voltage across cells or mod-
ules, because the current from other
cells in the same series is forced to
flow through the shaded area. This
may cause undesirable heating to
occur.
The use of a diode to bypass the
shaded area can minimize both
heating and array current reduction.
All modules are equipped with fac-
tory installed bypass diodes. The
factory installed diodes provide
proper circuit protection for the
systems within the specified system
voltage, so that you do not need
any other additional bypass diodes.
Specifications of bypass diode for
VBHNxxxSJ25 modules are as fol-
lows; Number of bypass diode: 3
diodes Number of series cells per
bypass diode: 24 cells / diode (See
Figure 3).
Specifications of bypass diode for
VBHNxxxSJ45 modules are as fol-
lows; Number of bypass diode: 4
diodes Number of series cells per
bypass diode: 22 cells / diode (See
Figure 3).
Specifications of bypass diode for
VBHNxxxSJ47 modules are as fol-
lows; Number of bypass diode: 4
diodes Number of series cells per
bypass diode: 24 cells / diode (See
Figure 3).
MECHANICAL LOADING
The method offers a maximum load as
shown in the table “Mount Location and
load resistance” in Figure1 and Figure 5 is
a static state on the module surface.
Cable
Figure 2. Configuration of
Junction Box
Connector (SMK plug)
Positive (+)
Negative (-)
Cable
24 cells / diode
24 cells / diode
24 cells / diode
24 cells / diode
Figure 3. Number of series cells per bypass diode
24 cells / diode
24 cells / diode
24 cells / diode
VBHNxxxSJ25
VBHNxxxSJ47
22 cells / diode
22 cells / diode
22 cells / diode
22 cells / diode
VBHNxxxSJ45
