Kaco blueplanet 1502x Manuel d'utilisateur télécharger pdf (Page 12)

Page 12 blueplanet Installation Instructions 1502x - 5002x

. External DC switch and AC disconnect

Intended use

NOTE

External DC switch

An external all-pole DC disconnect switch and an

AC disconnect, which allows for the inverter to be

disconnected from the photovoltaic generator and

the AC power grid and removed for service.

DANGER

When replacing the inverter section, the installer must measu-

re 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 con-

ductor 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 groun

ded and is live with respect to the position of the ground fault.

Section 5 · Installation and Start-Up

Safety of components

The Authority Having Jurisdiction (AHJ) has a dicult

charge and maintains ultimate authority of the solar

electric system’s nal inspection. The AHJ must be well

versed with the requirements of the NEC, understand

the local utilities’ ruling on the use of a utility external

disconnect switch (UEDS), and applicable use of a UL

 approved product.

The following NEC  subsections provide an over

view of the solar electric system disconnect require-

ments: .; :, ., .; ., ...

Subsections are summarized below. For the complete

text refer to the applicable NEC version approved for

use in your jurisdiction.

.: The means to disconnect all current carrying

conductors of a solar electric system from all other

conductors in a building.

., 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

.. Section B, equipment specic to the photovol

taic source circuits such as over current devices, circuit

isolation switches, and blocking diodes are permitted

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.

.: 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 disconnecting means should be grouped and iden

tied. Allowances for several AC circuits to be discon-

nected is allowed as long as the disconnect complies

with .

.: The means for disconnect all ungrounded

conductors should be readily accessible, externally

operable with exposing the operator to live circuits,

and plainly indicate the open and closed positions. The

disconnect shall have an interrupting rating sucient

for the nominal circuit voltage and current that is avail

able at the line terminals of the equipment.

.: The supply side of the inverter shall be permit

ted to be connected to the supply side of the service

disconnecting means as permitted in ... The

load side is permitted as long as each interconnection

is made with a dedicated circuit breaker rated for the

appropriate current back feed rating.

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Kaco blueplanet 1502x Manuel d'utilisateur Page 12

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