What is Voltage?
In a static electric field, the work required to move per unit of charge between two points is known as voltage. Mathematically, the voltage can be expressed as.
And if it is in an electrical circuit, it can define as the amount of potential energy between two points. If there is a difference of the magnitude of the potential energy of two points there will be a potential difference between the two points. So once again the difference between the charges from higher and lower potential points call the voltage of the two points. So it is a reference value from one point to another. Without voltage or potential difference, electrons would move randomly in free space.
If there is three points having potential of 24V. 12V and 0 V, the Voltage between three difference points will be the difference of the potential value of two points.
And this basic phenomena, drag a whole stream of electrical engineering and be the almost all source of electrical engineering. And From Extra Low Voltage.
So as a result of voltage difference, a flow of electric charges happen from one place to another. This will call the electric current.
So the most basic concepts of electrical engineering was identify now as Voltage and the Current. And simply say that the voltage is the cause of the current to flow whereas the current is the effect of voltage.
When we discuss about the voltage there are certain terms that uses most of the time, call nominal voltage, rated voltage. And Will discuss about that.
What is Nominal Voltage and Rated Voltage and what is the difference?
Nominal voltage is used as a voltage reference. In power system instruments, cables, batteries, modules, the term nominal voltage is used. Nominal voltage is a value assigned to a circuit or system to will identify the voltage class.
And considering a electrical power system the nominal voltage of the electrical power system known as the system voltage. It can vary with a given range of percentage of its nominal value.
For example : A motor indicate 230/400 – Star/Delta, 120/240V in some other instrument.
So for sure this is not the exact value which the machine operates, but the range of acceptable working voltage. So actual voltage which the appliance or the circuit working can vary with the acceptable range of + or – Percentage value.
In common practice for “TT system” (will have a different article on earthing systems) 230V mains supply, but it can vary from 231.5V , 227.5V vise versa.
So for the better understanding it can be say that it will be the average or approximate value of the working voltage of a appliance or electrical circuit.
Rated Voltage :
The rated voltage defines as the “highest voltage that a electrical equipment can operate and with its thermal limits, without damaging or lowering of the life span of the equipment.
In other words,
“The voltage range for which the equipment is designed to operate under the stable condition”
In addition to that there is another term called the operating voltage, This is known as the running or actual voltage which the equipment is working.
So we have learnt 3 terms in this article on voltage;
- Nominal Voltage
- Rated Voltage
- Operating Voltage
And in the comment section, please add your important ideas and I will open up a forum as well to discuss more about this interesting topic.
-Team News ican-
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