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THE SMALL MARGIN of reserve capacity existing throughout the electrical utility industry due to war and postwar shortages has created an increasing interest in methods of load reduction to meet temporary emergency conditions until normal capacity can be restored. Voltage and frequency reductions within limits will affect customers very minutely. However, the over-all reduction on a large system may be sufficient in most instances to avoid the necessity of interrupting load.
Comly et al. (1948) studied this question.