Power cables are the basic components of any electrical system. There are different types of cables that are available in the market. The choice of which specific cable types should be used for specific purposes is based on several factors, the most important of them being the technical specifications of the functions.

As much as you may be conversant with electric cables, it is possible that there are things about power cables that are new to you. Here is a brief outline of some of the things about power cables:

Many people believe that copper is a far better conductor of electricity than aluminium at all times. This is inaccurate. When it comes to matters of what type of conductor is better between these two metals, there are many factors that need to be taken into account.

The most important one of them is that conductivity in relation to cable wires is not merely a function of the measure of resistivity but rather a unique combination of the size of the cables and the insulation material that is used. Hence, in cases where super-high voltages have to be used over long distances, it becomes economical for one to use aluminium cables as opposed to copper ones.

It is common to hear people talk of the possibility of their current cable capacity to remain stable forever. Incidentally, this is a common misconception about electrical cables that people hold.

However, the truth of the matter is that the cable current capacity changes all the time and does not remain stable over the lifetime of the cables. These changes are usually caused by factors such as the prevailing ground or air temperature, the actual manner in which the laying has been carried out and the depth at which the cables have been laid.

There are several reasons as to why newly installed power cables do last as long as people expect them to. The first one is that since there are many manufacturers of electric cables, it is highly unlikely that all the power cables that you install will last for a specific period of time.

The second one is that there are many different types of power cables. A specific type of power cable is defined in terms of its capacity, durability, usage and other industry-specific characteristics.

The third one is that the extent to which a cable lasts heavily relies on the manner in which the installation is done. A poorly done installation may significantly shorten the life of a cable.

The armor that is used on your cable is not meant to help in protecting the cable against any chances of physical impact. On the contrary, if any type of power cable is exposed to a form of physical stress, it is possible that the damage to the cable arising from the impact is likely to be aggravated by the armor!

The controller keeps on monitoring the application requirement in a continuous control loop. It then commands the inverter to produce the required voltage and frequency to meet the application requirements. To do this, the controller, comprised of a microprocessor, takes the input signal from the sensor and compares this with a reference signal. It then generates the appropriate control signal for the inverter to vary its output power.

In a typical application, the controller will monitor process parameters such as pressure, flow rate, temperature or liquid level. For example, an oxygen sensor in a boiler provides a signal to adjust the speed of the fan and control the amount of oxygen in the boiler system.

Today’s drives, using microprocessors, semiconductor power switches, and SMDs are now smaller, compact, cheaper, more reliable and efficient. A typical drive will also include a filter to suppress harmonics generated when converting the DC to AC voltage.