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The four phase AD418R is designed to emulate the "Lincoln" thermal Ammeter that has been used since about 1919. The digital logarithmic averaging produces the same thermal response as the original meter, but with vast improvements in accuracy, stability, and features. It can be set up and operated from the front panel or with a computer. The AD418R can automatically collect and store monthly Demand data for all three phases plus the neutral in a transmission or distribution line to help a Utility to operate its system in an efficient manner. It is ideal for monitoring substation Transformers and maximizing Transmission line capacity. High loads or Peak Demand periods can be anticipated before they occur and verified accurately afterwards with the internal real time clock's one second resolution time- stamping. Instantaneous and Demand individual phase peaks and coincident peaks are recorded. Coincident Peaks are selected by computing the sum of the present Demand values. For three phase transformers, the peak Coincident Demand value gives the true thermal peak of the transformer. A free, powerful MS-DOS computer interface program allows easy setup and data retrieval. |
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