Difference Between Continuous and Prime Power Generators

Generators are typically classified according to their manner of operation: prime, continuous, or standby. Continuous and prime power generators are among the most popular options for industrial and commercial applications that require a dependable power source at all the times, especially in remote locations, such as gas and oil operations, ships, construction, and mining. They may have similarities, like an ability to continuously operate for longer periods of time, but their difference lies on the amount of load they can handle during operation. Continuous generators can operate continually at a consistent load, and prime generators can operate at variable load.

Both continuous and prime power generators are practical in applications that are far from the grid or there is a limited amount of electric power from a grid. In some cases, it may be more cost-effective to use these generators, which run on diesel fuel, then purchase electric power from the nearest grid. Like most machinery that runs continuously for extended periods, continuous and prime power generators will need to be rugged and are able to handle the heavy loads they must support. Moreover, they need to be capable of handling friction efficiently between moving parts, and efficiently handle high heat generation.

Prime power applications typically fall under two categories: limited and indefinite running times. Either way, they are appropriate in applications where buying power is not an option. Continuous power generators are ideal for situations where the supplying power is constantly at 100 percent load for an indefinite number of hours annually, so they are more efficient when there is no power grid, such as in military operations, mining, and agriculture. 

Prime power generators are typically more expensive than others of the same capacity for backup or standby power, making them cost-effective as a continuous power source. When choosing prime and continuous power generators, make sure that the engines come with a large and efficient cooling system to prevent a build-up of high temperatures, which can cause malfunctions and advanced damage to internal components. Consider a cooling system for both the engine and the alternator, as these are often subject to high temperatures.