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B-54
In most installations, Prisma P cubicles do not require partitioning. In this case,
the switchboard is a Form 1.
Safety being one of its foremost goals, Schneider Electric offers options and
features that go well beyond the recommendations of the standard.
The protection of life and property is a standard feature due to:
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front plates that require a tool to be removed
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keylocks on doors, some of which provide access to live parts the systematic
installation of terminal shields on Compact NSX circuit breakers and Interpact
INS and INV switch-disconnectors
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covering of the upstream and downstream terminals on the incoming device so
that operators are perfectly safe at all points in the switchboard when the
incoming device is off (open).
What is more, Prisma P offers different levels of partitioning to create separations
inside the cubicles and thus create Form 2, 3 and 4 electrical switchboards.
Electrical switchboards must meet the degree of protection IP2X to comply with
standard IEC 60439-1.
Forms according to IEC 61439-1 & 2
Decisions concerning the Form of separation and the
degree of protection are the subject of an agreement
between the manufacturer and the user.
Prisma functional system
Form2b.eps
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Terminals for external
conductors separated from
busbars.
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The functional units and
the terminals are separated
from the busbars.
Form 2b
Form3b.eps
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Terminals for external
conductors separated from
busbars.
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The functional units are
separated from each other
and from the busbars.
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The terminals are
separated from the busbars,
but not from each other.
Form 3b
Form4a.eps
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Terminals for external
conductors in the same
compartment as the
associated functional unit.
Form 4a
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Terminals for external
conductors not in the same
compartment as the
associated functional unit,
but in individual, separate,
enclosed protected spaces
or compartments.
Form 4b
Form4b.eps
Form1.eps
In most installations, Prisma
P cubicles do not require
partitioning. In this case, the
switchboard is a Form 1.
bb
Safety being one of its
foremost goals,
Schneider Electric offers
options and features that go
well beyond the
recommendations of the
standard. The protection of
life and property is a
standard feature due to:
vv
the systematic installation
of terminal shields on the
incoming device
vv
and covering of the
upstream and downstream
terminals.
Form 1