Rating your diesel generator right.

Ratings for a diesel generator is result of intended use and the ability to supply power. So, when you look at buying a generator, you would first consider its intended use. While it may seem obvious what power rating is required for an application but there are a number of factors to consider before purchasing a generator. Let’s familiarize ourselves with generator ratings and their relevance.

Standby Power Rating

The primary application of a Standby Power Rated generator is to supply emergency power for a limited duration during a power outage. These generators do not have an overload capability built into the units. Standby power rating should be applied to the unit where public utility power is available and power cuts are very rare.

Prime Power Rating

The prime power rating is the maximum power accessible at the variable load for an unlimited number of hours per year in a variable load setting. Prime power rated generators should be used if the public utility power is intermittent with frequent power cuts.

Continuous Power Rating

Continuous power rating is used in applications where the need for supplying power is at a constant 100% load for an unlimited number of hours each year. These units are used in applications where the power grid is unreachable, for e.g.: mining, agriculture or military operations.

Elevations and Temperature’s Effect on Power Rating

Beyond the above mentioned considerations, elevation and temperature are also factors to be considered before rating the engine.

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