KACO blueplanet 6400xi - Manual (Page 27)

Page 28 blueplanet Operating and Installation Instructions 6400xi - 7600xi
Safety of components
The Authority Having Jurisdiction (AHJ) has a diffi cult charge
and maintains ultimate authority of the solar electric system’s
fi nal inspection. The AHJ must be well versed with the require-
ments of the NEC, understand the local utilities’ ruling on the
use of a utility external disconnect switch (UEDS), and appli-
cable use of a UL 1741 approved product.
The following NEC 2008 subsections provide an overview of
the solar electric system disconnect requirements: 690.13;
690:14, 690.15, 690.17; 690.64, 230.82.6. Subsections are
summarized below. For the complete text refer to the appli-
cable NEC version approved for use in your jurisdiction.
690.13: The means to disconnect all current carrying
conductors of a solar electric system from all other
conductors in a building.
690.14, sections A through D: Section A, the disconnec-
tion means are not required to be suitable for service
equipment and should be rated in accordance with
690.17. Section B, equipment specifi c to the photovol-
taic source circuits such as over current devices, circuit
isolation switches, and blocking diodes are permit-
ted on the solar electric side of the disconnection
means. Section C, the disconnection means should
be located in a readily accessible location, preferably
near the points of building entrance, be marked as a
solar electric system disconnect, suitable for use for
the prevailing conditions, and limits the grouping of
disconnects to six per enclosure. Section D, permits
utility interactive, or grid tied inverters to be located
in areas that are not readily accessible, and details
the switch requirements. The AC and DC disconnect
should be line of sight with the inverter and be readily
accessible.
690.15: The means for disconnecting all aspects of a solar
electric system must be provided, and if the equipment
is energized from more than one source, the discon-
necting means should be grouped and identifi ed.
Allowances for several AC circuits to be disconnected
is allowed as long as the disconnect complies with
690.17.
690.17: The means for disconnect all ungrounded conduc-
tors should be readily accessible, externally operable
with exposing the operator to live circuits, and plainly
indicate the open and closed positions. The discon-
nect shall have an interrupting rating suffi cient for the
nominal circuit voltage and current that is available at
the line terminals of the equipment.
690.64: The supply side of the inverter shall be permitted to
be connected to the supply side of the service discon
necting means as permitted in 230.82.6. The load side
is permitted as long as each interconnection is made
with a dedicated circuit breaker rated for the appropri
ate current back feed rating.
ACTION
– Mount the inverter so that the wall bracket fi ts into the
notch on the rear of the inverter assembly mounting
plate.
– Then secure the inverter assembly mounting plate with the
help of the lower screw.
5.3 Connection box with DC disconnect
Intended use
The blueplanet connection box is intended to be installed
with the inverter as one unit during the initial installation. If
an inverter must be removed for service, the connection box
must remain installed to protect persons from contact with
the live DC conductors inside. The connection box contains
an integrated DC disconnect switch to comply with the NEC
article 690 disconnecting means. The switch disconnects only
the DC conductors. The switch has a hole used for locking into
the OFF position during inverter replacement. When the switch
is in the off position the DC wiring inside the inverter is discon-
nected. The AC power grid must be disconnected external to
the connection box. The connection box has a shield which is
secured by Torx type screws which protect service personnel
from electric shock as the circuits inside are energized by the
photovotaic array. For servcing the connections inside the
shielded area, the photovoltaic array must be de-energized
by applying an opaque cover over the array or other means
and the AC circuit must be de-energized by switching off the
breaker or other means.
! DANGER
When replacing the inverter section, the installer
must turn off the DC switch in the connection box-
and turn off the external AC switch. Lock both and
measure the AC and DC wiring to be sure it is not
energized.
!
WARNING
Electric shock hazard. The DC Conductors of this
photovoltaic system are ungrounded and may be
energized.
Description of components
The DC switch is located on the right side of the connection
box. When pointed to the front of the unit it is in the OFF
position. When pointed in the UP position the unit is in the ON
position. Clearly visible labels can be provided upon request.
I Designates the ON or energized position.
O Designates the OFF or non-energized position.
S e c t i o n 5 · I n s t a l l a t i o n a n d S t a r t - U p