Measurement of Insulation Resistance on Energized Systems
Emanuel L. Brancato, A. T. McClinton · Transactions of the American Institute of Electrical Engineers · 1950
An instrument has been developed to measure the insulation resistance of either an a-c or d-c system without removing the system from operation. The present voltmeter method of performing this operation involves the taking of a number of readings and applying these to a formula, but the new instrument makes it possible to get the information which is desired directly.