7
using bolts and nuts with larger grounding
holes.
Use a grounding tin plated solid copper
lay-in lug rated for direct burial and
outdoor use. Lug must be used ILSCO
GBL-4DBT, BurndyCL501TN.
Attach grounding lug to module frame using
a stainless steel bolt and lock-nut as
shown in Figure 3.3.
Tighten stainless steel set screw at the
torque specified by lug manufacturer to
secure copper wire.
The specified torque is following
Ilsco
Corp.
GBL-4DBT
10-14AWG-Solid -> 20 in-lbs,
4-6AWG-Strand -> 35 in-lbs,
8AWG-Strand -> 25 in-lbs, 10-
14AWG-Strand -> 20 in-lbs
Burndy L L C CL501TN 14AWG-
Solid
->
35
in-lbs,
14AWG-Strand -> 35 in-lbs,
4AWG-Strand -> 45 in-lbs
Recommended torque value in tightening
bolt and nut is 2.3 N.m (20in-lb).
Using a Grounding Clip with bolt and nut
Use Tyco Electronics 1954381-2 as
grounding clip.
As shown in Figure 3.4, place the
grounding clip onto the module frame.
Thread the hex nut onto the end of the
screw, then using a 3/8-in. wrench,
tighten
the
nut.
Recommended torque value in tightening
bolt and nut is between 1.7 and 2.2 Nm.
Insert the wire into the wire slot. Press
down on both ends of the wire.
Manually, or using channel lock pliers, push
the slider over the base until it covers the
base. This will terminate the wire.
For more information, please refer to
Instruction sheet issued by Tyco Electronics.
Module Terminations
A junction box as a terminal enclosure is
equipped for electrical connections.
VBHNxxxSA16
and
VBHNxxxSA16B
Modules are equipped with MC
TM
plugs
as a terminal enclosure. Use these MC
TM
plugs for electrical connections
(see Figure
4.1).
Connectors between modules must be
inserted until they click.
Junction Box and Terminals
Modules are equipped with one junction box
containing terminals for both, positive and
negative polarity, and bypass diodes.
Each terminal is dedicated to one polarity
with the polarity symbols engraved onto the
body of the junction box (see Figure 4.2).
Each terminal is provided with factory
installed lead cables and a latching
connector for series and string connections.
Always use these connectors and do not
detach them from cables.
Latching connectors are type IV and made
by Multi-Contact. Supplied connectors listed
by UL.
In order to comply with NEC 2008, a
locking sleeve needs to be used with all
connectors that are exposed.
The locking sleeve (PV-SSH4) is made
by Multi-Contact and can only be released
with a special tool also made by
Multicontact (PV-MS). Locking sleeves are
not supplied with modules and must be
purchased separately.
Conduit
In applications where wire raceways or
conduit are used, follow the applicable
codes for outdoor installations..
Verify that all fittings are properly installed
to protect wires against damage and
prevent moisture intrusion.
DIODES
Bypass Diodes
When modules in series strings are partially
shaded, it may cause reverse voltage
across cells or modules, 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.
Modules are equipped with factory 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.
MAINTENANCE
Some maintenance is recommended to
maintain optimal output performance of the
solar modules.
It is also recommended to inspect the
electrical and mechanical connections
annually.
If you need electrical or mechanical
inspection or
maintenance, it is
recommended to have a licensed authorized
professional carry out the inspection or
maintenance to avoid the hazards of electric
shock or injury.
The return of any modules will not be
accepted by Panasonic unless prior written
authorization has been given by
Panasonic.
As part of our policy of continuous
improvement Panasonic reserves the right to
change product specifications at any time
without prior notice.
Figure 4.2 Junction Box
Cable
Positive ( + )
Negative ( - )
Figure 4.1 Connectors
Option:
Safety lock clip
Connector
MC
TM
Plug
Cable
Negative ( - )
Positive ( + )
