KACO blueplanet 1502xi - Manual (Page 29)

Page 26 26 31000770-02-112609 blueplanet Operating and Installation Instructions 1502xi - 5002xi
Safety of components
The Authority Having Jurisdiction (AHJ) has a difficult charge
and maintains ultimate authority of the solar electric system’s
final 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 specific 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 identified.
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 sufficient 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
disconnecting means as permitted in 230.82.6. The
load side is permitted as long as each interconnection
ACTION
– Mount the inverter so that the wall bracket fits 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 AC/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 and AC conductors inside. The connection box contains an
integrated AC/DC disconnect switch to comply with the NEC
article 690 disconnecting means. The switch disconnects only
the AC Line-1, AC Line-2 and DC Hot 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 AC
and DC wiring inside the inverter is disconnected and should
be safe for removal. 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 switch in the connection box, lock
it and measure the AC and DC wiring to be sure it
is not energized.
!
DANGER
If there is a ground fault in the PV array, the
grounded conductor may be live. This is a problem
with the requirements of the National Electric Code
requiring that only the ungrounded conductor be
switched. If a ground fault is present and the GFDI
fuse blows, the grounded conductor is no longer
grounded and is live with respect to the position
of the ground fault.
Description of components
The DC/AC switch is located on the right side of the connec-
tion 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.
Section 5 · Installation and Start-Up