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On
the path of ISO 9000
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Warnings :. |
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The
appliances and its electric outlets
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Nor
all the electric outlets need a wire land. This occurs
when they are constructed in such way that the amount
of the " fugitive " electrons is in according
with the acceptable limits. In these cases, for its linking,
it is necessary only take until them two wires ( neutral-phase
or phase-phase), which are directly on, through appropriate
connectors or using the two poles's plug.
By the other side, there is some appliances that come
with the incorporated wire land, either being part of
the linking's handle of the appliance, either separate
of it. On this situation, it is necessary to use a three
pole's plug (phase-neutral-land or phase-phase-land) compatible
with the type of the appliance's plug or a two pole's
plug binding the wire land of the appliance directly to
the wire land of the instalation.
In short, all instalations must be prepared to receive
any type of electric appliance, it concludes that, as
it is prescribed by the Brazilian Norm of Electric Instalations
(NB3), all the circuits of general purpose plugs and also
the ones that serve the specific appliances (as shower,
air conditioning, microwave, washing clothes machine,
etc), must have a wire land on.
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The threat of the Harmonicas and its solutions.
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The
electric transformers generally used as elements of modification
of tension and current, also are used in some occasions to change
the regimen of the neutral of the instalation, in order to get a
galvanic isolation of some stretches of circuits or still as an
additional way, to well protect against directly contact.
Lately, the electric transformers come being also applied in the
area of the Harmonicas, over all, for its property of being able
to isolate loads of the source.
Due to the form how the rollings (primary and secondary) are connected
with the transformer, it becomes more adequate for the confinement
of certain orders of Harmonicas.
In short, it is possible to confine the problematic equipments
in terms of Harmonicas's generation, in an specific part of
the instalation being prevented that the same ones harm the remain
of the system ahead of the transformer.
For
more information click here
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ELETRÔNICA LTDA |
On the path of
ISO 9000
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