Abstract: Disclosed herein is a transformer assembly, comprising a toroidal transformer element including a ring and a secondary winding wound around the ring; the ring being arranged to receive a main therethrough to form a primary winding; and a recording medium containing a set of successive incremental factors, each of the factors relating a measurement of a power component for one increment of power flowing through the secondary winding with an expected value of the power component for the increment of power flowing through the secondary winding, both the measurement and the expected value corresponding to a flow of power through the primary winding, wherein the transformer element, together with the set of factors, is capable of generating measurements of power with improved accuracy when corrected by the factors.

Abstract: Disclosed herein is a technique for calibrating a transformer element, comprising the steps of providing a transformer element with a primary winding and a secondary winding; providing a memory to store a range of expected values of a power component, each value being representative of a flow of power expected through the secondary winding for a corresponding flow of power through the primary winding; establishing a flow of power at a first level through the primary winding, thereby to establish a corresponding flow of power through the secondary winding; measuring the power component for the flow of power through the secondary winding to obtain a first measurement thereof; comparing the first measurement with a corresponding expected value and calculating a first factor according to the difference there between; and storing the first factor; varying the flow of power in the primary winding to a second level; measuring the power component for the flow of power through the secondary winding to obtain a second

Abstract: Apparatus for controlling consumer usage of electric power by selective load shedding during peak periods comprises, in combination: a) a transmitter capable of transmitting a burst of a desired duration of electrical pulses of a selected frequency through each phase of a power transmission line; b) at least one group of receivers, each group of receivers including at least one receiver, each receiver being provided with means for detecting the duration of a burst of said pulse and actuating or deactuating an electrical device in response thereto.

Abstract: A lamp dimmer suited for fluorescent and other lamps which controllably notches the applied voltage to a lamp circuit each half cycle. Progressively larger dimming control voltages produces progressively wider notches as well as progressively causing the notches to be further from the zero-crossing occurrence toward the peak occurrence of the half cycles, thereby providing means for varying power to the light circuit. Optocoupler means is employed with respect to a power output bridge to isolate the control circuit from the power output circuit to the lamp. A photosensor used to sense the ambient light conditions is used to produce the dimming control voltage so as to achieve a balancing effect between the ambient and the artificial light produced by the lamp.