Each Need has its Own Service Index

Each project has critical points: proper evaluation of these can optimise economic performance through the choice of the most adequate Service Index. To define this, it is essential to ask the right questions: what should the panel load be during operation, maintenance or upgrade?

Operation means all the necessary use of the unit to enable mechanical or electrical maintenance of the circuits or the unit receptors, or during off-load testing.

The Service Index determines the capacity of the unit to separate (electrically) and/or close off (mechanically) all or part of the unit in order to securely intervene or carry out off-load tests on this part of the unit, with measured consequences on the said operation.

Maintenance means maintenance, repair or inspection operations (which go from inspection to replacement of defective components) performed to maintain the specifications of the unit.

The Service Index determines the capacity of the unit to be securely maintained with measured consequences for the operation of the unit.

Upgrade means change of the unit by adjustment (of calibration), the addition or replacement of items (some upgrade operations require interruption of the concerned functional entity: increase in power, change of technology).
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Service Indices (SI) are defined by UTE. SI is a definition tool for a low voltage panel, for use by prescribers. This tool enables specification of a low voltage (LV) panel by referring to user requirements rather than the technical aspects found in the standard NF EN 61439-1&2. This guarantees the proper definition of the panel for any subsequent action concerning operation, maintenance or upgrade.

SI is characterized by three numbers, each ranging from 1 to 3. These numbers show the level of operation, maintenance and upgrade of the LV panel. Number 1 offers the lowest service and 3 the best service.

COSYSTEC designs and produces cabinets with a service index that can attain 333.

To discover the level of service that you need, please use the following table.

Operation

Maintenance

Upgrade

1

I accept full stoppage of the panel.

1

I accept full stoppage of the panel.

1

I accept full stoppage of the panel.

2

I would like this operation only to entail the full stoppage of the functional unit* concerned.

2

I would like stoppage limited to the only functional unit* concerned. Restarting will be accompanied by intervention on the connections.

2

I would like possible stoppage limited to the only functional unit* concerned. Reserve functional units, for which the number and size have been defined, are provided.

3

I would like this action to entail only the stoppage of power to the functional unit* concerned, while authorizing automatic testing that enables the unit to be tested at real load before restarting.

3

I would like interruption limited to the only functional unit* concerned. Restarting will take place without intervention on the connections.

3

I would like the addition of any type of functional unit* (protection or motor command) without disconnecting the panel. This addition will be carried out in a non-equipped position, within the limits imposed by the manufacturer.
* Functional unit: the set of appliances related to an outlet: protection, breakers, separation, command.