Series EL Operating Curves
Kepco EL Series loads may be operated at any point within a boundary defined by the following characteristics of each model: rated power, rated voltage, rated current, and the minimum resistance.
Download Operating Curves for all models
The constant voltage (CV) boundary starts at rated voltage and near zero current. As source current increases, voltage stays constant until a point is reached at which the rated power dictates that increasing current must have a corresponding decrease in voltage: this is the start of the constant power (CP) boundary. Once source current increases to the rated current of the model, this is the start of the constant current (CI) boundary, where current stays at the rated value while source voltage decreases until the load reaches itls minimum resistance. This is the start of the constant resistance (CR) boundary, where decreases in source current or source voltage must decrease the available power.
Model 5K-400-420 may be operated at any given input condition that is within the red line boundary shown above. For example: If a 300 Volt source is to be tested with a Model 5K-400-420, select the 300 Volt line (blue) and note the range of current allowable along that line. In this example, the load may be operated in CV mode at currents from near zero to a maximum of 16.6 Amperes @300V.
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