Abstract: In an electronic watt-hour meter including a power measuring device and a clock circuit, a data setting device for setting data such as time zones, holidays and the like and programs is detachably connected to a data transmission circuit, while a PROM for storing the set data and programs and a ROM for storing programs required for receiving the set data and programs through the data transmission circuit and storing the same in the PROM are provided in a memory circuit. Under the control of a CPU, an electric power measured by the power measuring device is processed in accordance with the data and the programs stored in the PROM and displayed on a displaying device, while the data setting device itself is removed from the watt-hour meter after the data and the programs have been memorized in the PROM.

Abstract: A modular electronic demand register for an electric meter is enclosed in an insulating housing into which substantially all components are installable by drop-in, snap-together methods. A display is dropped into the housing and metallic contact pads thereof are interconnected with corresponding metallic contact pads on a printed circuit board using a resilient contact strip of a type having parallel longitudinal resilient conductors insulated from each other by an insulating resilient matrix. The as-formed contact strip is slightly longer than the distance between the two sets of metallic contact pads which it interconnects, whereby, when the printed circuit board is tightened in place, the contact strip is compressed slightly to provide a stable, resiliently urged fit. Guide surfaces on the electronic demand register cooperate with surfaces on the remainder of the electric meter to guide the electronic demand register into its operational position and to lock it in place.

Abstract: A method and apparatus of obtaining a correction value for the deviation between an actual power usage and a desired target power usage during a time period, comprises dividing the time period into a plurality of time segments, measuring, after each time segment a fraction of time into each time period, and multiplying the fraction by the target power usage to obtain a value corresponding to the fraction of the total power usage during the cycle. Also after each time segment, the total amount of power which has actually been used is measured and a difference is taken between the total amount power used from the beginning of the period and the fraction of the target power usage from the beginning of the period. This value is then divided by the amount of time remaining in the cycle to obtain the correction value. The correction value can be processed and utilized to control an internal generator for the plant or to take other corrective action.

Abstract: A solid state electronic pulse scaler uses the ratio of two integers to control a ratio of its input and output frequencies. In one embodiment, the pulse scaler is used as a calibration device to adjust for manufacturing tolerances in an electric metering device. In another embodiment, the pulse scaler is used to provide a pulse-initiator output to external circuits. A further embodiment includes both of the above functions in a single device. A switch-selectable control is provided to determine the consequences of input pulses generated during reverse rotation of a meter disk. The reverse pulses may be used to generate output pulses on the same, or a separate, channel as that employed for forward pulses, ignored, or temporarily stored and subtracted from ensuing forward pulses.

Abstract: A time-of-use watt-hour meter is provided with demand profile capability that defines a plurality of survey periods and demand intervals. During each survey period, electrical consumption is measured during a plurality of demand intervals. The highest measured interval demand occurring during each survey period is saved and compared to the highest interval demands for subsequent survey periods. The five highest interval demands occurring during a billing period are saved for inspection by both the electric utility and the consumer. The use of the survey periods and demand intervals has the beneficial affect of avoiding clusters of peak periods occurring during a single sustained period of high electrical consumption. The results of the demand profile data compilation can be viewed at the watt-hour meter or remotely.

Abstract: A memory programmer interface for an electronic demand register includes conductive pads on a circuit board within a housing of the electronic demand register and spring-pin connectors which fit through slots in the housing of the electronic demand register into resiliently urged contact with the conductive pads. In the preferred embodiment, the conductive pads are enlarged solder pads associated with a non-volatile memory in the electronic demand register. A pair of alignment pins on the memory programmer guidingly enter alignment holes in the housing and/or the circuit board of the electronic demand register to provide alignment between corresponding ones of the conductive pads and the spring-pin connectors. The memory programmer includes a power source sufficient to energize at least selected portions of the electronic demand register and a control signal generator for generating control signals including a signal for maintaining a microprocessor in the electronic demand register in the reset condition.

Abstract: A non-volatile memory copy programmer provides temporary storage into which data can be read out from a non-volatile memory of an electronic demand register of an electric meter and from which the stored data can be written into a non-volatile memory in a replacement demand register. The non-volatile memory copy programmer also produces control signals for controlling reading and writing in the non-volatile memory. A power monitor circuit in the demand register enables the storage of data from a volatile memory to the non-volatile memory in the event of a loss of power and enables restoring the data from the non-volatile to the volatile memory when the power is restored.

Abstract: A display temperature compensator employs the non linear temperature coefficient of resistance of a thermistor to non linearly vary the control voltages fed to a liquid crystal display. At low temperature, substantially the entire supply voltage is available to control the liquid crystal display segments. At higher temperatures, the thermistor contracts the range of control voltages fed to the display in order that non-selected display segments remain off. A thermistor is used which has a non linear temperature coefficient of resistance which, when combined with selected fixed resistance value, substantially compensates for the non linear threshold voltage of the liquid display.

Abstract: An electronic demand register divides a demand interval into a contiguous set of N demand subintervals. The demand in each demand subinterval is summed with the demands from the N-1 most recent contiguous demand subintervals to derive the interval demand. The interval demand is compared with a prior stored maximum demand to decide whether to discard the present interval demand or to use it to replace the previously recorded maximum demand. Demand is accumulated in terms of actual power usage by scaling power usage pulses according to the relationship in the particular meter on which the rolling demand register is used. Thresholds are provided for producing warning signals to alert the consumer to an actual or impending demand condition which may adversely affect billing.

Abstract: A skid plate retained below an electronic register module includes a plurality of cantilevered spring fingers formed by parallel pairs of slots in the skid plate. Each cantilevered spring finger includes a frusto-conical button which bears against a back plate in a housing during installation of the electronic register module therein. A rear end of the back plate includes a pair of mouse holes into which a rear pair of frusto-conical buttons engage during an intermediate stage of inserting the electronic register module into the housing. This engagement establishes the correct side-to-side positioning of the rear end of the electronic register module. A front cantilevered spring finger and its associated frusto-conical button resiliently urge the front of the electronic register module upward during substantially all stages of installation and in the operational position thereof.

Abstract: An electronic demand register for an electric meter includes a plurality of pushbutton controls for controlling material displayed or a mode of operation of the demand register. A lockable switch actuator includes an actuating paddle within a cover or housing of the meter which, when unlocked, can be rotated into alignment with a selected one of the pushbutton controls and then pushed inward to actuate the selected pushbutton control. A pair of bosses bracketing one of the pushbutton controls prevents actuation of its respective control until the actuating paddle is accurately positioned between them. A second pair of bosses bracketing another of the pushbutton controls are spaced too closely apart to permit the actuating paddle to pass therebetween and they thus prevent actuation of their respective pushbutton control.

Abstract: An electronic demand register performs rolling demand metering in which a demand interval is divided into N subintervals. At the end of each subinterval, the demand data from the just-completed subinterval is summed with the demand in the most-recent N-1 contiguous subintervals to derive an interval demand. A test operation is provided in which the stored maximum demand, a number representing the remainder of the subinterval interrupted by the test and programmed constants are stored in non-volatile memory but are also retained in the processor for use during test. A test reset switch resets accumulated demand data and presets the subinterval timer to predetermined values from which they may be operated by a calibrated test load to confirm the performance of the demand register. At the end of testing, all data in the processor is zeroed and the data stored in non-volatile memory is restored.

Abstract: An electronic demand register performs rolling demand metering in which a demand interval is divided into N subintervals. At the end of each subinterval, the demand data from the just-completed subinterval is summed with the demand in the most-recent N-1 contiguous subintervals to derive an interval demand. In the event of a power outage, the existing value of maximum demand, and a number representing the time remaining in the subinterval interrupted by the power outage, as well as programmed constants, are stored in non-volatile memory for safekeeping during the power outage. After power is restored, the stored values are used to preset a maximum demand storage to the saved value of maximum demand and to preset a subinterval timing down counter to the value it had upon the detection of an impending power outage. A logic circuit freezes accumulation of demand data for a grace period following power restoration to avoid detection of an artificially high demand from synchronized starting loads.

Abstract: An electronic register for an electric meter includes a non-volatile storage into which data is written upon the detection of an impending power outage. A sufficient quantity of electric energy is normally stored in a capacitor to continue operation of the electronic register for a long enough period of time to complete the writing of data to the non-volatile storage. In order to prevent writing of the data to non-volatile storage in the presence of noise or momentary power outages, when the voltage in the capacitor decays to a point which indicates an impending power outage, a timer is started. If the voltage is not restored before the end of the timing cycle of the timer, then the data is written to the non-volatile storage. If the voltage is restored before the end of the timing cycle, then writing of the data to the non-volatile storage is prevented.

Abstract: The subject device control system provides a new method of determining when resource consuming loads are to be disabled to prevent the total resource consumption from exceeding a predetermined threshold. This system bases the decision making process on a customer controllable risk parameter, past consumption, past load shedding activity and predicted future load activity. The controlling algorithm is applied to the present resource consuming situation for a plurality of different time interval configurations and the worst case result of these computations is used to control the load shedding.

Abstract: An electronic demand register includes a processor for calculating a demand in a demand subinterval. At the end of each demand subinterval, the calculated demand is summed with the demand in the preceding N-1 subintervals to derive an interval demand over N contiguous subintervals. The interval demand is compared to a previously recorded maximum demand and, if the interval demand exceeds the maximum demand, its value is substituted for the maximum demand for use in subsequent comparisons. The processor employs volatile memory. A non-volatile memory is provided for storing the billing data and programmed constants in the event of an impending power outage. A power monitor detects the possibility of an impending power outage and, operating on stored energy, both enables and powers the transfer of data to the non-volatile memory. When power is resumed, the power monitor enables resetting the processor and retransferring the data from the non-volatile to the volatile memory for resumption of demand metering.

Abstract: A maximum demand meter comprises a driving part for transmitting a rotation depending on a consumed electric energy, a differential gear mechanism comprising a first sun gear rotated by the driving part in a predetermined direction, a second sun gear driven in the opposite direction of the rotation of the first sun gear and a planet gear for transmitting the rotations of the first and second sun gears to a push arm for moving a pointer, a zero-returning driving part for rotating the second sun gear of said differential gear mechanism in a predetermined direction and an engaging pawl means for inhibiting either of the first and second sun gears of the differential gear mechanism from rotating in a predetermined direction.

Abstract: A multiple rate metering system suitable for use with an existing single rate, electromechanical electricity meter employing an Eddy current disc mounted in a casing, comprises a first unit mountable inside the casing of the electricity meter, and a second unit, which is portable so that it can be brought into close proximity with said first unit by a meter reader. The first unit comprises a sensor for generating pulses in response to rotation of the Eddy current disc, a first microprocessor, a first read-only-memory for storing a program to control the operation of said first microprocessor, a random-access-memory, the first microprocessor being programmed to store data in said random-access memory related to the pulse count in different predetermined periods during which different electricity rates apply, and a first coupling device for establishing communication through the casing with said second unit when said second unit is brought into proximity with said first unit.

Abstract: An integrating circuit for generating control signals representing watt-hour consumption for connection to an electronic watt-hour meter. The circuit includes a Hall effect sensor for sensing watt-hour consumption, a circuit for integrating the sensed watt-hour consumption, and a circuit for compensating for DC offset voltage generated by the Hall effect sensor.

Abstract: An apparatus for controlling distributed electrical loads including a microprocessor based central controller coupled via a twisted pair bi-directional data line to a plurality of microcomputer based transceiver decoders. Each transceiver decoder is coupled to a plurality of relays, each relay associated with a particular load to be controlled. Override switches and sensors, coupled to transceiver decoders provide override requests and information related to ambient conditions at the site of a load. A user defined data base includes sub-sets of relays called sectors, patterns of relay states, remote switches, a time dependent schedule and condition responses. A communication protocall and arbitration scheme provide for interactive communication between the central controller and each transceiver decoder with interfacing with the operation of any other transceiver decoder. Enhanced data storage capacity is achieved through dynamic allocation of memory space for pattern data.

Abstract: A watt-hour meter is disclosed which includes: a microprocessor coupled to a solid-state Hall-Effect sensor; an electrically alterable ROM coupled to the microprocessor; a power supply; a power outage timing means using the discharge characteristic of a capacitor; apparatus for supplying a 60 Hz clock signal to the microprocessor; a readout device coupled to the microprocessor to provide an indication of the power consumed; an output on the microprocessor for controlling a circuit breaker; and a switch for overriding the microprocessor controlled circuit breaker.

Abstract: A programmable time-of-use metering system is disclosed for metering electrical energy consumption at multiple rates depending on the time of day, time of week and time of year in which the energy is being consumed. A method for registering total energy consumed by a metered system as well as energy consumed during preselected time intervals is also disclosed.

Abstract: A monitoring device and method for determining the present demand of electrical energy consumed over a predetermined time period which includes an adjustable reflective scanner or sensor mounted exteriorily of an electric meter for sensing and determining the speed of the rotating disc of a conventional electric meter. The arrangement is such that the scanner or sensor detects the revolutions of the meter disc and emits a signal or signals which are amplified and fed into a counting device which includes a memory and in conjunction with a printer prints the time of day, the date (at midnight) and the number of revolutions of the rotating meter disc which is stored as recorded in memory for a given unit of time. The counting device, memory and printer are embodied in a printing calculator interfaced with timing and scanning means.

Abstract: In a measuring process for determining a tariff value for energy consumed, fixed quantity pulses are produced by means of a pulse generator 6 associated with a consumption meter 3. Measurement values which are proportional to the reciprocal of the time intervals between the fixed quantity pulses are summed in a summing means 9. The expectation value P of the power, the quotient of the expectation value P and the mean value P of the power, and the form factor of the load curve, are determined in an evaluation device 11, from the measurement value Z.sub.2 of the summing means 9 and the measurement value Z.sub.1 of the consumption meter 3. The summing means 9 and the consumption meter 3 are connected to the evaluation device 11 by way of a communication channel 10. A microprocessor may be used for determining the reciprocal.

Abstract: Electronic circuitry monitors the electrical energy consumption of a system and displays the current cost of the energy usage. The projected monthly billing cost is calculated at the current rate of consumption, and an alarm signal and control output are generated if the projected cost is higher than a budget amount. Energy consumption is sensed optically at the electric meter and a proportional number of high frequency pulses are added to the household electrical network. These pulses are remotely sensed at any point within the household electrical network and are fed to a microprocessor for counting and conversion to cost parameters. Clock pulses are also directed to the microprocessor for calculating the billing period and for displaying time parameters. A keyboard enables initializing and modifying the cost and time parameters in the microprocessor.

Abstract: A multirate dial register for meters having a rotatable measuring element includes plural sets of dial indicators having at least one set thereof selectively coupled by a clutch mechanism to the measuring element such that the ratio of measuring indications at the one set of dial indicators is controllable at the front of the register for converting between measurements of different parameters of a measured quantity by a solenoid actuated clutch wherein one solenoid plunger end controls the clutch and the opposite plunger end controls an on-off dial indicator.

Abstract: A clutch mechanism for time of day watthour meter dial registers includes a clutch mechanism having a driving part continuous driven by a rotating measuring element so that it is freely rotatable when the clutch is open and a clutch driven part which is shiftable between clutch open and clutch closed positions by a lever arm which further arrests rotation of the clutch driving part during the clutch open position.

Abstract: The meter includes a kilowatthour register which is continuously engaged as well as at least one special register (kilowatthour or demand) which is selectively engageable. A calendar memory (ROM) stores data representative of schedule events and the times (called "calendar times") at which such events are to be effected. The events may include the engagement of a special register or controlling a load under customer programming. A Central Processor Unit (CPU) deriving timing information from the line frequency generates real time data and compares it with the stored calendar time for implementation of a schedule event. When the schedule event time arrives, the CPU implements the event (as by energizing an appropriate register selection circuit) and addresses the next schedule event in the calendar memory. The system includes a display for the real time data as well as means for setting the time data.

Abstract: A dynamic rate integrating demand monitor which measures electric power to a customer load at closely-spaced time intervals and prices that load at each such interval on the basis of a predetermined set of factors.

Abstract: A clutch mechanism for watt demand meter registers includes a clutch driving part continuously driven by a rotating measuring element so as to be freely rotatable when the clutch is open. The driving part is mounted between a clutch driven part and a clutch closing part which clamps the clutch parts together when the clutch mechanism is closed.

Abstract: An A.C. electric power usage measuring and display system using microcomputer based digital processing. Power usage pulses optically sensed from a watthour meter rotary disc and time pulses sensed from the 60 Hz A.C. power line are input to a microprocessor that is programmed to calculate and display the day of the week 1 to 7, the time of day on a 24-hour clock basis, the total watthours and kilowatthours since the start of a billing period on a decimal basis, the peak interval watthours and kilowatthours on a decimal basis, the peak interval start time and end time on a 24-hour clock basis for a peak interval of predetermined time, the peak power demand in kilowatts on a decimal basis, the day of the peak demand on a weekly 1 to 7 basis, the time of the peak demand on a 24-hour clock basis, and the present demand in kilowatts on a decimal basis.

Abstract: A portable programmer-reader unit for programmable time registering AC electric energy meters utilizing replaceable program control data includes plural memory locations for programming, time and date synchronization, readout, and monitoring of the coded values of identical data items included in the meter program control data. A visual display provides numerical readouts of the data items including meter readings for different time categories of electric energy measurement by said meter and indication of error condtions. Manual control and a data entry inputs control meter data communication, readouts of the visual display and modification of the data items stored in the programmer-reader unit for programming the meter. Power conserving logic circuits extend field use while operating with a battery power supply.

Abstract: A summing watt-hour transducer is connected to a three-phase power line to monitor the energy being supplied to one load, and is connected to an ordinary watt-hour transducer that monitors energy supplied to a second load. A summing integrator circuit sums and integrates signals derived from the power line and the ordinary watt-hour transducer to obtain a voltage proportional to a unit of total energy demand. The summing operation is triggered by a signal from a control circuit that is responsive to contact closure pulses from the ordinary watt-hour transducer. Output signals from the summing integrator circuit are converted to contact closures for input of energy demand signals to an energy demand/schedule controller.

Abstract: An AC electric energy meter includes a metering sequence logic control circuit for receiving pulses responsive to an AC energy quantity to be measured. Electric energy parameters are measured by the control circuit as it concurrently registers clock time and calendar data. A programmable rate selection table controls variable time intervals for accumulating different parameters during predetermined daily time measuring categories corresponding to different billing rates. The rate selection table includes plural rate switch control points defining daily measuring times nominally on a day of the week basis. A programmable yearly date code table designates days during the year for still different daily code times. The measured parameters are stored in separate electronic registers so as to have coded values of kilowatthours and/or kilowatt demand for direct electronic display in a multiplexed and reoccurring sequential order.

Abstract: Electronic circuitry monitors the electrical energy consumption of a system and displays the current cost of the energy usage. The projected monthly billing cost is calculated at the current rate of consumption, and an alarm signal is generated if the projected cost is higher than a budget amount. The current flow is sensed and digital pulses are fed to a microprocessor for counting and conversion to cost parameters. Clock pulses are also directed to the microprocessor for calculating the billing period and for displaying time parameters. A keyboard enables initializing and modifying the cost and time parameters in the microprocessor.

Abstract: In a device for measuring maximum energy consumption over a fixed period, a shift register and up-down counter are used to establish a sliding period and the maximum energy over that sliding period stored.

Abstract: A programmable energy load controller system, allowing each of a multiplicity of energy loads to be established in a selected one of an unenergized condition and a plurality of energized conditions, utilizes a central microcomputer facility in communication with a selected one of a plurality of remotely located load control processors, each configured with a unique address and capable of selectively energizing a plurality of energy loads coupled thereto under control of the central facility. The central facility includes at least one user input device, allowing a plurality of maps of load conditions, established in accordance with a user-selectable criteria, such as time-of-day and day-of-week requirements, to be loaded into a data storage associated with the central computer.

Abstract: An improved watt-hour meter which permits time modulation of the power utilized wherein varying rates can be imposed upon the power user. The improved meter includes a substantially standard type watt-hour meter to which is added circuitry which alters the effective time during which the potential coil of the watt-hour meter is connected in circuit. Inasmuch as the power reading or indication by the meter is a function of the time during which the potential coil is connected in circuit, the effective power reading and, thus the rate structure can be selectively altered in this manner.

Abstract: A time of day demand metering system is disclosed for registering the amount of electrical energy consumed during the one demand interval of maximum electrical energy consumption out of a plurality of demand intervals. Means is provided to engage the register of a time of day meter only during those demand intervals when the amount of electrical energy being consumed is in excess of the one previous demand interval of maximum electrical energy consumption.

Abstract: A meter cover (housing) mounted mechanism incorporating a combination key operated tamper resistant security lock, externally controllable meter reset actuator and meter access hatch.

Abstract: In a power system, a time-of-day demand meter of the type having a programmable control circuit for generating a control signal at prescribed intervals to enable a demand logic circuit to control the engagement of a demand register of the meter includes apparatus responsive to the control signal to generate an end of interval signal to disengage the demand register at a specified time as selected by the apparatus to control the length of demand intervals during which the consumption of electrical energy is measured.

Abstract: A meter includes a single sweep hand dial for indicating maximum demand in a predetermined time period as well as a multidial decade register for recording cumulative demand. The sweep hand dial is driven by a pusher gear. A pusher arm urges the pusher gear in a first rotational direction to record maximum demand during the period. To reset the mechanism, a button is pushed manually to axially displace a reset gear into meshing engagement with a relatively high speed gear train driven by the timer motor. As the reset gear is thus moved, pins on the reset gear are displaced from stowage slots in a plate, and as the reset gear rotates, the pins ride on the plate until the reset gear completes a full cycle of operation during which time another pin on the reset gear engages a second tab on the pusher gear to reset the pusher gear in a rotational direction counter to that in which the pusher arm had rotated the pusher gear.

Abstract: A unidirectional drive assembly for a mechanically driven meter register includes a gear shift operated gear ratio mechanism which allows a dial on the meter register to be driven up-scale at a normal rate with the forward direction of rotation of the meter input drive and driven up-scale at a compensated or faster rate with the reverse direction of rotation of the meter input drive. The ratio of the gears of the gear ratio mechanism can easily be changed to provide ratios which compensate for meter drag when the meter is run in the inverted position so that the meter registers correctly when operated in either the upright or inverted position, or to provide ratios which make the meter dial run up-scale at a faster than normal rate when the meter is tampered with to make its input drive operate in the reverse direction of rotation.

Abstract: A timing motor of an on-peak demand meter is turned on only during maximum demand metering times. Torque aiding effects of the timing motor stray flux augment the meter disc torque to compensate for the intermittent demand gearing load.

Abstract: A remote meter reading maximum KW demand meter includes a register having an integral pulse initiator. The register drives the pulse initiator in response to maximum demand measuring movement of the meter. In one mode of operation, demand indicating pulses are generated incrementally as the increments of measured KW demand increases. In another mode, the pulse initiator generates a continuous pulse stream responsive to the total maximum KW demand measured during a predetermined billing period when the register is reset by a remotely actuated solenoid.

Abstract: A multi-dial meter register includes two energy consumption dial gear trains and a maximum power demand gear train that are selectively coupled to the meter movement of an electric utility billing meter. Two shifting control plates produce engagements and disengagements at input gears of the gear trains. A connecting shaft extends between the control plates and provides concurrent movement and further provides a dial status indicator at one end thereof.

Abstract: An electronic signal proportional to Icos.theta. for an induction motor is substantially proportional to the mechanical power output of the motor. This signal is detected by rectifying a signal which is an analog of motor current in phase with the motor voltage and time averaging the rectified signal. Comparing the averaged signal to a reference level permits the interruption of motor current for an underload or an overload condition. The circuit permits detection of excessive ice formation on the outdoor heat exchanger of a heat pump system. The circuit is connected to the impeller drive motor which forces air across the heat exchanger and stops the motor and initiates the de-ice procedure when the ice blockage causes mechanical power delivered by the motor to deviate to a selected level.

Abstract: Power demand control in a plant facility is improved by allowing the demand limit imposed as a target to be met at the end of a control period to follow the actual demand in the plant. The demand limit is automatically optimized as actual demand fluctuates and it is set in accordance with past history.

Abstract: The specification discloses a system for displaying a cumulative indication of the estimated cost of electrical usage in a dwelling wherein electricity is applied through an electrical supply main. A coil is inductively coupled to the supply main for generating a signal representative of the magnitude of current passing through the supply main into the dwelling. The signal is rectified and amplified and is applied to an analog-to-digital converter which periodically samples the signal to generate digital signals. Input switches are operable by the consumer in order to provide a rate indication representative of the cost of the electricity flowing through the supply main. A calculator circuit is responsive to the digital signals from the analog-to-digital converter and is responsive to the rate indication from the input switches in order to periodically calculate an estimated cost of electricity passing through the supply main at the time of sampling during a preceding period.

Abstract: An electrical power controlling/load shedding system includes power consumption metering and meter interfacing circuitry for entering overall power consumption into a central processing unit. The CPU memory includes a data storage table characterizing each system electrical load under each of a hierarchy of operational levels, and circuitry is provided for turning local and remote loads on/off, responsive to CPU-issued commands.The digital computing apparatus operates on the meter supplied information and projects energy consumption over the monitoring interval. If power must be shed to obviate an excessive projected demand, loads are examined seriatim and selectively shed on a priority basis as required, depending upon the operational parameters and status characterizing each load for the then prevailing load level condition.