Lightning Transformers?

Is this USA domestic wiring?

Normally lighting transformers are used when the main plant voltage is a 500v system. The transformer is used to supply 220v to the lighting and auxiliaries.

May be they are used when you need high intensity light from a small lamp those are made for low voltages,Just think of a bulb used in optical fiber probe or in a microscope.

They offer bright white light and consume a very small spaces, just a thought.

Quote "In old systems dating back to 1980s "

I take issue with your referring to the 1980s as OLD. The 1880s is OLD. Its all in your point of view.

Dear giri,

I'm with Aldego in essence, since in the 'old days' lighting differed in voltage and type from the 'power' supplied for motors and machinery. It also was a way of organizing when there were no voltage differences. Incandescent lighting is highly resistive, and the other loads were highly inductive which may have involved some application of capacitors.

Like WarEagle I too had to smile when you referred to the '1980's as "the old days". Perhaps "relativity" has more to do with time than energy. How about E=e-Mt² where E=our present energy, e=youthful energy, M=our weight and t=our age in years. Thanks for making many of us from before the 'old days' smile. CJM

Quote CJ "How about E=e-Mt² where E=our present energy, e=youthful energy, M=our weight and t=our age in years.

I think you may have left out an important factor in your equation.

It should read E=e-Mt² - WS² where WS is your waist size.

very funny.......welcome to the jokes!

Electrical regulation in older days are updated and revise as the technology is getting better and the safety of the apparatus has also been increase tremendously.

Even though with all these changes and aspect of safety for the apparatus had been increase, the system still remain the same. Now days, it is not economic to have two transformer to provide the power supply for the purpose of lighting & other auxiliary and the other unit for the main application for the machinery in the plant.

The electrical power distribution system is by using one transformer to provide the electrical power supply to all the application that a plant needed.

But however, some still remain the old system is that they have the separate power distribution board for lighting and another separate distribution board for auxiliary power supply. This is to isolated the lighting and the axillary power, if there is a faults in the axillary power side.

In this case most of the faults come from the axillary power because of faulty electrical tools that someone uses it. It also help to prevent totally black out if there is a faults occurs

As you are mentioning the blackouts, but now a days UPS are utilized to prevent black outs in case main transformer trips.

But still utilization of the lighting transformer is for controlling the voltage of the lighting system which in turn helps to reduce overall consumption for the lighting. As at low voltages some components related to power electronics may fail causing production loss. Also, the faults in the lighting system may cause the main transformer to trip on earth fault if the fault has occured very near to the transformer ground point.

Also, there are some neutral transformer utilized for balancing the voltage between the phase and neutral in the system.