street light automatic on off in day night sensor wiring
If we hide the oil lamps of the medieval period, public lighting did not experience its first industrial boom until the second half of the 19th century, under the leadership of Prefect Haussmann. In a hurry to make up for a delay of nearly twenty years in London, Paris has installed more than 50,000 gas streetlights, put into service every evening by nearly 1,000 lighters.
Electricity, which appeared in 1884 at Place de la Concorde in Paris, took nearly a century to supplant gas as a source of energy. The first major stage in the development of underground networks was the period 1920-1939.
To limit ourselves only to the Paris region, the capital then developed an individual supply of each household of public lighting by the low-voltage distribution network. It innovates by creating the first high voltage network to supply the main tracks in the Bois de Boulogne. The municipalities of the inner suburbs of Paris follow it in this new technique.
It was a great time for the construction of networks, some of the elements of which still remain. The year 1939 brought this to an end with the lighting standby state following the war.
The technical revolution which saw in twenty years, from 1950 to 1970, the almost total replacement of incandescent sources by fluorescent balloons had little impact on the networks because the installed powers were almost always lower.
On the other hand, from the end of the 1960s, the development of urbanization and the creation of new towns led to the creation of new networks. New materials have appeared, both in the field of cables and in that of accessories (boxes, transformers).
These installations are now more than thirty years old and there are serious maintenance problems.
Half of underground street lighting systems are over thirty years old, their normal lifespan. The earthworks inconvenience the citizens and are expensive, without any clearly visible improvement. However, faults in public lighting networks are responsible for three quarters of service interruptions in public lighting, with the lamp and its accessories accounting for only the remaining quarter.
The renewal of public lighting networks is determined by a concern for maintaining heritage in good condition, leading to programs timed according to industrial maintenance methods.
First, cables do not age evenly like in the lab.
Depending on their location, they can be more or less attacked:
Physically by ground movements following work in the neighborhood;
Even chemically by the nature of the soil;
Or the seasonal presence of groundwater.
Then, it is only exceptionally, following multiple and frequent faults, that the choice of the street to be modernized will be determined by the condition of the cable.
Many other reasons more often prevail over this one. For example, integration into a road operation, the concern to strengthen lighting in a sensitive or prestigious area, a burying operation of networks which is also subsidized.
street light automatic on off in day night sensor wiring
If we hide the oil lamps of the medieval period, public lighting did not experience its first industrial boom until the second half of the 19th century, under the leadership of Prefect Haussmann. In a hurry to make up for a delay of nearly twenty years in London, Paris has installed more than 50,000 gas streetlights, put into service every evening by nearly 1,000 lighters.
Electricity, which appeared in 1884 at Place de la Concorde in Paris, took nearly a century to supplant gas as a source of energy. The first major stage in the development of underground networks was the period 1920-1939.
To limit ourselves only to the Paris region, the capital then developed an individual supply of each household of public lighting by the low-voltage distribution network. It innovates by creating the first high voltage network to supply the main tracks in the Bois de Boulogne. The municipalities of the inner suburbs of Paris follow it in this new technique.
It was a great time for the construction of networks, some of the elements of which still remain. The year 1939 brought this to an end with the lighting standby state following the war.
The technical revolution which saw in twenty years, from 1950 to 1970, the almost total replacement of incandescent sources by fluorescent balloons had little impact on the networks because the installed powers were almost always lower.
On the other hand, from the end of the 1960s, the development of urbanization and the creation of new towns led to the creation of new networks. New materials have appeared, both in the field of cables and in that of accessories (boxes, transformers).
These installations are now more than thirty years old and there are serious maintenance problems.
Half of underground street lighting systems are over thirty years old, their normal lifespan. The earthworks inconvenience the citizens and are expensive, without any clearly visible improvement. However, faults in public lighting networks are responsible for three quarters of service interruptions in public lighting, with the lamp and its accessories accounting for only the remaining quarter.
The renewal of public lighting networks is determined by a concern for maintaining heritage in good condition, leading to programs timed according to industrial maintenance methods.
First, cables do not age evenly like in the lab.
Depending on their location, they can be more or less attacked:
Physically by ground movements following work in the neighborhood;
Even chemically by the nature of the soil;
Or the seasonal presence of groundwater.
Then, it is only exceptionally, following multiple and frequent faults, that the choice of the street to be modernized will be determined by the condition of the cable.
Many other reasons more often prevail over this one. For example, integration into a road operation, the concern to strengthen lighting in a sensitive or prestigious area, a burying operation of networks which is also subsidized.
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