Resistive, Inductive, and Capacitive Loads: What is the Difference Between Them?
In an electrical network, there are basically three types of electrical loads: resistive, inductive, and capacitive.
This classification is directly linked to the power factor, which measures whether the electrical energy received is sufficient to meet the needs of daily use, whether in homes or businesses.
What are resistive loads used for?
Resistive loads are commonly used in irons, showers, and incandescent lamps.
In short, connecting a resistive load to the system means that the current and voltage will change polarity in phase, that is, synchronized, generating a unitary power factor, where the energy flows in the same direction through the system in each cycle.
In other words: the current that circulates through this load alternates and follows the applied voltage.
For this reason, every purely resistive load has a unitary power factor.
How are inductive loads used?
Inductive loads, generally used in motors and transformers, create magnetic fields through the coils present in the equipment connected to them, producing reactive power with a current wave lagging behind the voltage.
The power factor, in this case, is zero.
And capacitive loads?
Capacitive loads, used in capacitor banks, fluorescent lamps, and computers, create electric fields through the capacitors present in these loads.
Therefore, it causes a delay in the voltage and also has a zero power factor.
Power Factor: Why is it Important?
In a simplified manner, the power factor results from the ratio between active power (energy used in equipment) and apparent power (which indicates the sufficiency of the energy in question).
Knowing the power factor is important for greater safety and economy in the environment, preventing machines, tools, appliances, and other devices from burning out or having problems.
