Basic Components – 5 minutes
Identifies the basic components of a typical electromechanical watthour meter. Identifies the function of each component in a typical electromechanical watthour meter.
Fluxes – 8 minutes
Identifies the fluxes at work in a watthour meter and describes where each flux originates. Describes how watthour meter fluxes are distributed in a meter. Identifies the direction of each flux at given points in time.
Driving the Disk – 10 minutes
Identifies the four driving fluxes that cause a meter disk to rotate. Describes the relationship of the fluxes at four points in time. Explains how the fluxes interact in a watthour meter to drive the disk.
Lagging the Potential Coil Flux – 8 minutes Explains why the potential coil flux must be lagged behind the current coil flux, and by how much. Identifies the components in a watthour meter that cause the potential coil flux to lag the current coil flux, and briefly explains, using phasors, how this is done.
Controlling Disk Rotation – 7 minutes
Explains why it is necessary to control the rotation of a meter disk. Identifies the component in a watthour meter that controls the rotation of the disk, and briefly explains its operation.