What are Terminal Distribution (series) switchboards?
This article in our Blog aims to offer a sufficient answer to all users who want to know the meaning of the definition of Terminal (series) Distribution Boards.
Read the post will offer general information, but if you want specific information
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Normative reference
First of all, let us clarify that the definition is useful to quickly convey the basic concept behind the design of these switchboards, which is compliance with the specific reference standard.
In particular, after the IEC 61439 standards came into force internationally and were transposed by the corresponding Italian CEI EN 61439 standards, a list was formed to represent the existing categories of switchboards and the corresponding definitions.
Previous standards divided these switchboards into AS (built in series) and ANS (not built in series).
In the case of ASs, the standard required the switchboards to conform to the prototype submitted by the manufacturer for testing at CESI (Centro Elettrotecnico Sperimentale Italiano), while ANS switchboards might not conform to the reference prototype, but they still had to refer to a model switchboard that had to be an AS.
Therefore, to be okay from the regulatory point of view, for AS and ANS switchboards, it was sufficient to comply with the assembly rules provided by the switchboard manufacturer.
With the new standard CEI EN 61439, this dualism has been overcome and the electrical distribution board is considered compliant if it meets the design verifications dictated by the standard itself, below, used according to the characteristic to be verified:
– Inspection of the switchboard (including wiring) and testing of electrical operation;
– Verification of IP rating (direct contacts);
– Verification of means of protection against indirect contacts (either by appropriate protective circuits or by complete isolation).
Terminal Distribution Switchboards contain the protections for the last level of distribution (e.g., light control, utility outlets, civil utilities, etc.). They are equipped with modular fixtures and are mostly made of plastic material for wall-mounted or recessed installation. This type of switchboard for domestic and similar use allows input current ratings not exceeding 125 A and voltages up to 440 V.
The range of distribution boards
The range of Terminal Electric Distribution Boards (standard) produced by Secsun in compliance with current regulations are intended for utilities where they are needed:
– Of the availability of interlocked outlets for supplying power to different machines(QEPI)
– For the protection of equipment and people in premises used for medical purposes(QEUM)
– for managing different sources of energy to ensure electrical continuity in case the power from the main grid fails.(QESR)
We certainly haven’t exhausted the entire topic at hand, so
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