Showing papers on "Electricity meter published in 1980"

Electric meter consumption and demand communicator

Abstract: An electric power consumption communicator system which includes a non-contact electric utility meter monitoring device which converts meter wheel revolutions into electronic digital pulses. An encoder device converts the digital pulses to coded electronic oscillations which are coupled onto existing power lines at the meter location. The existing power lines provide the medium for communicating coded meter intelligence to all existing power outlets in a residence or building. One or more signal decoders located at any power outlet decouple and reconstruct the coded meter intelligence into a digital format conducive to further processing.

Load control system for standard electric utility meter

Abstract: An automatic load control system for electric utility meters which includes an electric meter monitoring device which converts meter wheel revolutions into electronic digital pulses representing a known quantity of power consumption and a digital circuit which determines meter pulse rate or electric power demand and generates load control commands when predetermined demand levels are exceeded. Commands are transmitted from the monitoring device to a remote load control point by a data link to deactivate specific loads during periods of peak demand. Commands are also transmitted to selected remote locations for the purpose of switching indicator lights and alarms in order to display demand status to the power consumer.

Monitoring device and method for accurately determining and recording present demand of electrical energy

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.

Electricity theft preventing meter

Abstract: An electricity meter has one of its bayonets slidably carried by the meter base. When the meter is inserted in a meter socket, the bayonet in its normally retracted position conducts electrical power to the full potential coil. When the meter is removed, the socket functionally holds the bayonet until it slides to a detented extended position where the bayonet is locked into position and is connected so as to bypass a portion of the potential coil. When the meter is reinserted, the meter runs fast.

Mutual inductance current transducer for AC electric energy meters

Abstract: A mutual inductance current transducer includes a primary winding for direct connection to the current component of an electric energy quantity to be measured by an AC energy meter. A secondary winding is inductively coupled to the primary winding to produce an output signal that is proportional to the time derivative of the current component. The output circuit provides a current responsive input to an energy measuring circuit also receiving a voltage responsive input.

Tariff assessing device for electric power consumption

Abstract: 1. Pricing apparatus for electrical energy supplied to a store (19) of an electrically propelled vehicle (17) at transfer stations, in which, with the aid of an electricity meter (1), a sequence of pricing pulses proportional to the quantity fo electricity supplied is registered in a pulse counter, having an integral control unit which firstly cooperates with a comparator stage (9, 10, 11) to monitor two pulse sequences of the same frequency which are produced in a double pulse generator (1a, 1b) of the electricity meter (1) and which are re-weighted in an evaluation stage (7, 8) to give one pulse per monetary unit, and which secondly serves to monitor the connected external pricing circuit taking account of the charging device (4), characterized in that the evaluation stage comprises a series connection of an N1 /N2 divider (7) as predivider, which serves for determining the measurement base and in which the numerator and denominator can run through a specific range of natural numbers, and a programmable 100:x divider (8), the later being connected as a rate multiplier and being preferably settable decadically so that the output pulses have a value equivalent to one pulse per monetary unit, and that the external pricing circuit is controlled by a continuously pulsed impedance measurement so that the effect of the measurement in each case appears in the gaps between the counting pulses, the latter being fed, via a synchronising stage (23) operating in conjunction with a clock pulse generator (26), to one (22a) of two inputs (22a, 22b) of an AND-gate (22), wherein the decoupled output (22c) of the latter is connectible to the operating voltage (UB ) via a steady-state-current-impedence (28), and also is connected to the input (27a) of a window discriminator (27) of which the output is applied to the D-input of a D-bistable (25), the clock input (25b) thereof being acted upon by the clock generator and the output (25a) acting via an inverter member on the second input (22b) of the AND-gate (22).

Electricity meter shunting device - is applied to mount-supported connector block under meter terminals to maintain supply on meter removal

Abstract: An electricity meter (2) is mounted on a panel (1) with a cover (10). Each phase of the supply is introduced through a lead (4) to two knife contacts (5) on the meter through a connector (7). This connector has two sockets on top for the contacts (5) and is supported by an elastic mount (8) which is joined to the connector (7) by a dovetail key and a latch. The front face of the connector has a bore through which a shunting tool can be inserted. The shunting tool is carried in the mount. If the meter is to be removed for repair and continuity of supply is to be ensured, the shunting tool is inserted. Its design will withstand the statutory short-circuit current of 6000A.

Anti-theft electric meter

Abstract: A watthour meter with a rotatable metering movement responsive to the flow of energy through the meter includes a gravity activatable contact or stop element to engage the metering movement when the meter is inverted for preventing deregistration of consumed energy. Latching means can lock the element in a position showing that the meter had been inverted.

Electronic multiphase electricity meter - has regulated common supply for all individual phase measurement sections using separate secondaries

Abstract: An electronic multiphase electricity meter with a number of electronic single phase measurement sections corresp. to the number of phases has a voltage measurement series resistor and a current measurement shunt in each section. It has a more economical current supply then similar circuits. A common power supply section (16) is provided for all three single phase sections (1, 2, 3) of a triple-phase meter. The amplitude in the power supply section is regulated so accurately that the voltages obtained from the secondary windings (18c, 18d, 18f) can be used directly to supply each section after rectification. For mutually isolated current and voltage circuits each measurement section has a secondary winding for each circuit. The pulse width modulator switching signal for a pulse width modulation type meter is fed to the amplitude modulator via an optoelectronic coupler or pulse transformer.

Measuring method of iron loss and so on

Abstract: PURPOSE:To make it possible to obtain iron loss of adjacent steel, etc., with a high precision on the basis of a voltage induced by the operation below, by laying a search coil so that only a required part out of the magnetic flux interlinked with a power supply circuit can be interlinked. CONSTITUTION:Conductor 1 is laid in parallel, and one end of it is short-circuited, and transformer 2 for power supply is inserted to the other end. Next, voltage lead wire (insulating line) 3 is spirally wound around the outside circumference of conductor 1 at a fixed pitch so that the magnetic flux of only a proper part out of the magnetic flux interlinked with a power supply circuit can be detected. Then, mutual reactance 5 is inserted to the power supply circuit and connected in series to voltage lead wire 3 through variable resistor 7, and the output of it is inputted to power meter 8. The supply current is obtained by current transformer 6 and power meter 8. Iron loss, etc., can be obtained by the supply current and the voltage generated at the opened end of voltage lead wire 3.

Measuring unit for pump delivery flow

Abstract: PURPOSE:To enable to measure the pump delivery flow with a simple combination of power meter, function operator and signal converter. CONSTITUTION:The pump delivery flow can be obtained as a function of the shaft power, and accordingly, the delivery flow is obtained from a function of the power of drive motor. This principle is used for delivery amount measurement. That is, the flow in the suction well 26 is delivered to the delivery well 27 with the pump 25 driven with the motor 24, and the power consumption of the motor 24 is measured with the power meter 21, and this power signal is converted 28 into the input signal to the function operator. The delivery flow can be measured by operating the delivery flow according to the power consumption of the motor.