Reference On Electricity, Part 4 | From - Expert Contractors

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Volt Transformation

Transformer is a plain static crest consisting of a mesmeric heart where the chief and lesser windings are made. The voltage is candidly proportional to the number of windings or turns. Thus, if a 120 AC will be connected to the left segment containing 100 turns, 240 volts would be on the right face containing 200 turns.

The enter fringe is classified as the Primary while the Output fringe is classified as the Secondary. Under this train, the transformer is said to be 120 /240 volts walk up transformer with 120 crucial and 240 volts inferior.

The same transformer could be used as pace down transformer by reversing the sell and the weight. The 240 volts will be principal and 120 volts the derived. In succinct, transformers are reversible.

Power and Energy

Power and Energy are too frequently interchangeably used. Power is the practical span for the regular word work, and Work, is the effect of Power and Time uttered in the next equation:

Energy or Work = Power x Time

What Power? Power is the quotient at which energy is used or alternately, the rank at which work is done. Since energy and potential are synonymous, command implies continuity. That is, the use of energy at particular figure over a given span of time. The thought of might involve time at their speed of which work is done. Thus, multiplying control by time gives energy.

What is Energy? In electrical provisos, energy is synonymous with Fuel. It is associated with work. Energy could be spoken in gallons, liters, barrels or tons or oil, coal, kilowatt hours or consumed electricity and outlay of operations. In strict terms, Energy is uttered in units of BTU (calories), bottom pounds (joules) or kilowatt hour.

Under the English Unit System, the item of might is uttered in steed potential, BTU per hour, watt and kilowatt. Under the Metric System or SI, it is expressed as joules per next, calories per instant, watts and kilowatts. In brute terms, potential is also the regard at which fuel or energy is used and expressed as liters of fuels per hour, cubic gauge of gas per exact or tons of coals per day, etc.


Power in Electric Circuit

The measuring uhit of electric power is the Watt. When multiplied by 1000, the product is called Kilowatt. Thus, 1000 watts is one Kilowatt. Power has several form; an electric motor produces mechanical power that is measured in terms of horsepower. An electric heater produces heat or thermal power, and light bulb produces both heat and light that is measured in terms of candle power. Watt is the power term.


Voltage and Voltage Drop

Comparatively, in a Series Circuit - Current is the same throughout but voltage differs.

In a Parallel Circuit, the Voltage is the same, but the current differs.

Take note that is a parallel arrangement, all current loads cumulatively add. For instance, appliances and light loads connected to a parallel circuit has the same voltage imposed, but each load draws a different current according to its wattage rating.

Another one important principle that is worthy to note is; "The sum of the voltage drop around a circuit is equal to the supply voltage."This principle is important in a series circuit. On a parallel circuit, each item has the same voltage across it, which constitute a circuit by tiself. The voltage drop on wire carrying current is:

Voltage drop in wire = Carried current x Resistance of wire

The power loss in the wire conductor can be calculated as the product of the voltage and the current. it is equal to the components resistance times the current squared.

P = I x (I x R) ; P = I2 R

Adavantages of the 240 volts over the 120 volts current supply

1. Smaller wire is required which means, lower in cost.
2. Less power loss.
3. Smaller percentage of voltage drop.