As technical advances in the heavy construction equipment design and security help marketing efforts get ahead, the price increases have a tendency to remain modest in retrospect. This also speaks for all new, used, rented or leased heavy construction equipment alike. Each year the heavy construction equipment industry is meeting a global demand of turnout at about six percent each year. The heavy construction equipment industry has been sharing in the worldwide drive with a number of countries to construct new projects and to restore older public and private structures. Heavy construction equipment mainly consist of the following main categories: mixers, cranes, loaders, trucks, tractors, graders and rollers, just to name a few, as well attachments and parts. All heavy construction equipment is used in a wide range of applications from major infrastructure projects to office buildings and from housing to factories, power plants and mining. The extent of use of heavy construction equipment is so broad that key measures in demographics, such as the population growth, along with ample growth in economics, are the main influence of the demand for heavy construction equipment in the world today.

Heavy construction equipment and its components can be manufactured in fewer locations to service the global market. Heavy construction equipment can now move without any obligation between mature markets, while some emerging countries still require exports to qualify for liberated imports. Regions and countries vary widely in their demands of heavy construction equipment to perform tasks of building and re-building. The need for heavy construction equipment in these regions are more related to upgrade and maintenance of the existing infrastructure and buildings than it is to new projects. In other developing regions, the need for heavy construction equipment is used to build new projects such as highways, airports and urban buildings, etc. With a growing global demand of heavy construction equipment, the possibilities of building are endless.

Rectifier is the component of the UPS which converts the ac (alternating current) supply to dc (direct current) and provide charging current for battery as well as it also supplies to the inverter. As different UPS have different designs, commonly a separate charger is used. Battery is the power storage section and it is kept charged by any of the means- rectifier or separate charger. Its storage capacity is measured as the number of amperes of current that the battery supplies for an hour that is ampere hour abbreviated as AH. There are number of limiting factors depending upon the application of battery. If the design of the battery calls for short autonomy, the battery is discharged to lower level. In this case if there is need for long autonomy the battery is not allowed to be discharged so far.

Next component is inverter which provides alternating current output to the load, which is in phase with the input mains supply. It is also termed as clean supply due to the number of conversions from ac to dc and from dc to ac as well as because of the filtering involved in it. Static switch switches the load between utility mains supply and inverter. The connection between both of them is seamless and because of this arrangement if inverter experiences the situation of overloading, it will transfer the load to the more resilient mains supply due to its fast over-current detection circuits. Maintenance bypass let the load to be transferred to the utility mains and also to the UPS to be shutdown under controlled conditions. External maintenance bypass helps the UPS to be removed or replaced without causing any interruption to the load.