An insulator is used to prevent the unwanted flow of current from the energized conductor or conducting parts in an electrical system. It provides very high resistance so that no current can practically flow through it. Insulators generally consist of very small amount of free electrons, which results in almost no electrical current being carried. When a sufficiently large amount of voltage (known as “breakdown voltage”) is applied, insulators become conductive; the process being called “insulation breakdown”.
With so much dependence on our electrical appliances and electronics, we are bound to get frustrated and anxious when the electric power in our home is cut off, even if it may be for only a few minutes. And, one thing that we Indians are bound to do is try to fix everything on our own. One of the most common scenarios seen in every Indian household is trying to fix up an electrical connection and wire on one’s own when the electric supply is cut off. But, because we are not professionals, we may be able to solve tiny issues related to electricity, but not all the heavy duty faults. And, even when we try to work with the electric connections, we must be very careful to avoid any kind of disasters and unexpected hazards. For this, you must be well aware of these four things while working with electric wires and connections. Also, you must be well aware to replace your cables with cable harnesses to provide safe and long-lasting alternatives. You can get the best kind of customized harnesses from Miracle Electronics, one of the most renowned cable harness manufacturers in India.
Today, when the world is full of gadgets and electronics, and with our high dependence on them, we can’t imagine our lives without electricity for even a single day! Even if the electric supply goes off for only a few minutes, we start getting restless. Also, every big and small industry is greatly dependent on electricity for their production processes. To satisfy all these requirements, and for the proper flow of electricity, power transformers are very important to operate all kinds of electronic products and systems.
The electricity that we receive in our homes is produced in major proportions in the electrical grid that sends electricity over vast areas through power lines. However, the wires used in power lines are not good electrical conductors; and these imperfections resist the flow of electrical current. This results in loss of electrical power over longer power lines. To resolve this, step-up transformers are used to raise the voltage produced to a higher value, thus enabling power to travel longer distances effectively without loss of power. In this way, step-up transformers help in supplying power to transmission lines; but this high voltage of electricity cannot be used by the end users. Such high power can not only damage the appliances, but can also cause hazards and death. This is why the voltage needs to be decreased again before being sent to the end customers. Step-down transformers are therefore used at substations, and also on the utility poles near buildings, so that the voltage is lowered and current is increased by the time the power reaches the end users. In this way, both step-up and step-down transformers play important roles in bringing in acceptable amount of power in homes and offices for our everyday usage. These step-up and step-down transformers are the main classifications of power transformers. However, depending upon the construction and purpose, power transformers in India are classified into many other groups, which are as follows.