Showing papers on "Electricity meter published in 1992"

Energy monitoring system for a plurality of local stations with snapshot polling from a central station

Abstract: A PC computer monitors the energy, power, voltage, and current consumed at a plurality of local stations placed behind the electrical meter of the utility company for individual billing of the local users, a bidirectional communication line being used therebetween. A command from the PC computer causes at each station the power, voltage, current and totalized energy to be stored, and thereafter the PC computer derives individually the results for separate estimations and central billing.

Energy meter for solar panel energy generator - has box housing microprocessor with memory and counters connected to display while control switches are mounted in storage battery circuit

Abstract: The meter(5) includes a switch(6) which is placed in the charging circuit(7) of a storage battery(4). The battery is part of a solar panel energy generator which includes an array of photocells(1) transforming light(2) in electricity. The energy accumulated during the day is stored in the battery for being used over night. A second switch(8) is placed on the distribution circuit(9). two current detectors(10,11) measure the battery charging current and the output current. The battery temperature and voltage are measured by other detectors. Data is fed into a removable box(12) housing a microprocessor(14) with memory(15) connected to counters(16) and a display(13). USE/ADVANTAGE - For regulating and monitoring usage of energy generated by panel of solar cells. Can monitor energy consumption as well as time during which generator has been used. Can be recharged with credit units. Enables charging subscribers for system maintenance and wear.

Method for identifying electrical power consumers on a circuit being monitored

Abstract: A method is disclosed for identifying the various equipment (loads) on an electric circuit by non-invasive measurements, i.e. not requiring installation of equipment other than a suitable electric meter, for determining the portion of total consumption attributable to each equipment, and for classifying consumption in tabular form for later use. The method involves making appropriate measurements on the electrical supply current for the circuit to determine the variations in impedence of the circuit loads with time, identifying said loads by determining the portion due to an amplitude effect and the portion due to a phase variation, classifying these applied loads in a table, and calculating the consumed power for each type of previously identified and classified load.

Method of using a convertible metered power system to convert between temporary and permanent metered electric service

Abstract: A convertible, metered, power system, apparatus and method, of readily converting a construction site electric meter box between providing temporary metered power and providing permanent metered power; wherein the method of the present invention includes connecting a service line to the permanent meter box and diverting metered power from the meter away from the construction structure wiring, and into one or more, portable, temporary power outlets. In the preferred embodiment, the diversion and the portable power outlets are provided by the unique, portable, temporary electric service assembly of the present invented apparatus.

Meter connecting plug clamp for electrically meter with fixed contact pins - has retaining mechanism in form of slot in connection pin engaged by latch

Abstract: A meter connecting plug clamp (3) for an electricity meter (1) with fixed contact pins has contact pieces to which are connected the meter connecting cables and the electricity meter plug pins. The electrical plug connection of the meter connecting plug with the connecting block (1A) of the electricity meter is secured against displacement by a shape-locking retaining device. The retaining device is a slot (2A) engaged by a latch (3B). USE/ADVANTAGE - The plug clamp is mechanically secured to the electricity meter and the connection released only when the lead-sealed meter cover is removed.

Instruments for measuring the frequency and power of a microwave signal

Abstract: An instrument which provides a measurement of the frequency and power of a microwave signal supplied to an input port of the instrument. The instrument includes: a resistive device which divides the microwave signal supplied into first and second microwave divisions thereof; a frequency counter which measures the frequency of the first microwave division, thereby providing the measurement of the frequency of the microwave signal supplied; and a power sensor and power meter combination which measures the power of the second microwave division. The power sensor and meter combination makes a calibration correction dependent on the frequency measured by the frequency counter to its power measurement, thereby providing the measurement of the power of the microwave signal supplied.

Detachable battery package with built-in integrating power meter

Abstract: A detachable battery package is used for a portable apparatus, and comprises a secondary nickel-cadmium battery housed in a case for supplying electric power to the portable apparatus, and a volatile memory circuit storing an integrated value indicative of electric power consumption used in the portable apparatus so that an integrating electric power meter exactly indicates residual electric power of the secondary nickel-cadmium battery.

Method for approximating the notion of a rotatable disk of an electrical energy meter

Abstract: Simulated meter disk rotation is provided in an electronic power meter which does not include a meter disk to enable meter timing and testing to be accomplished in the same visual manner as the use of the disk in an electro-mechanical power meter. The existing segmented character display is used to provide a simulated gap in which horizontal display segments move and appear to wrap around the rear of the meter.

A sensor for optical detection of the movable part of a consumption meter for visual indication of the consumption

Abstract: A sensor for optical detection of the moving parts (13) of a consumption meter (11) for visual indication of consumption has visual aiming means (16) assisting the correct mounting of the sensor with respect to the movable parts (13) of the meter. For use in connection with an electricity meter (11), which has a circular disc (13) with a visible mark (14) on its periphery, the aiming means (16) are designed so as to have an extent in two dimensions and so as to define a plane which is caused to coincide with the rotating disc (13) of the electricity meter (11) at the mounting of the sensor on the meter.

Improvements in and relating to electricity meters using current transformers.

Abstract: Electronic electricity meter, comprising means (8) for evaluating the electrical energy consumed by a load, the evaluating means being adapted to evaluate the energy consumption from a signal indicative of voltage supplied to the load and a signal indicative of load current, said load current signal being produced by a current transformer (4). The meter further comprises storing means (9) storing one or more parameters indicative of the variation with primary current of the phase error or ratio error arising in the secondary current of a current transformer of a predetermined configuration, and the evaluating means is further adapted to process the load current signal so as to produce an adjusted value for the load current signal, said processing making use of said stored parameters. The parameters stored by the storing means (9) preferably comprise a plurality of values of phase error and/or ratio error for a respective plurality of primary current values of the current transformer of predetermined configuration, and the evaluating means is adapted to process the load current signal so as to produce an estimate of primary current in the current transformer, to select from the storing means (9) a value of phase error and/or ratio error for one of said plurality of primary current values corresponding to the estimated value of primary current and to adjust the load current signal using the selected value of phase and/or ratio error.

Remote reading of gas and electricity meters - Using miniature, battery-powered video camera fixed to wall-mounted meter box

Abstract: The meter reading arrangement is in two parts. One is fixed and installed at th user site, and the other is portable and includes the video camera. A mini video camera(3) is fitted over the interior positioned meter. The camera is connected to an exterior wall mounted box(5) by a cable(4). Inside the box(5) is a socket(7) into which a battery powered video display can be plugged. The battery is rechargeable. The power meter is read by pressing a button on the video display which connects the battery to provide power for the display and video camera. USE/ADVANTAGE-Water, gas, or electricity meters. Provides remote exterior access for meter reading.

High Power CW Wattmeter Calibration at NIST.

Abstract: The National Institute of Standards and Technology has established a measurement capability to support high power systems and devices. The automated wattmeter calibration system operates at power levels of 1 to 1000 W for frequencies from 1 to 30 MHz and 1 to 500 W from 30 to 400 MHz. A cascaded coupler technique is used to extend power measurements to high levels which are traccable to a 10 mW standard thermistor mount. This technique uses an arrangement of nominal 10, 20, 30, 40, and 50 dB couplers with sidearm power meters. The initial step transfers the calibration of the 10 mW standard to the 10 dB coupler/power meter. The standard is then replaced with a wattmeter to be calibrated. RF power is increased 10 dB and the calibration is transferred to the adjacent 20 dB eoupler/power meter. This sequence is repeated with the remaining coupler/power meters until the wattmeter is calibrated at the desired power levels and frequencies. Power ratios calculated from simultaneous power measurements made at each transfer are used to calculate the incident power at the wattmeter. Due to nonideal components, corrections are made for nonlinearities, mismatch, and other errors. Two types of wattmeters have been evaluated at selected frequencies and power levels. Total uncertainties are based on the random and systematic components.

Convertible energy meter

Abstract: The present invention, in one embodiment, comprises an energy meter capable of converting from one mode of operation to another mode of operation. In the one embodiment, the present invention comprises means for measuring energy consumption, and means for converting operation of the measuring means from a first mode to a second mode.

Test pencil type multifunction electricity meter

Abstract: The utility model relates to a test pencil type multifunction electricity meter, which belongs to a tool for testing electric appliances. The utility model comprises an insulating sheath, a test contact, an end cover, a controlling circuit board and button cells, a ground touch point is arranged at the tail of the end cover, and the controlling circuit board and the button cells are arranged in the sheath. The utility model has the advantages of simple structure, small size, low cost, convenient portability, easy application, AC/DC double function and multiple functions.

Meter for measuring power consumption of an electrical appliance

Abstract: A power meter (10) is provided which can plug into an electric wall socket and it is provided with its own socket (16) for receiving the plug of an electrical appliance. The power meter has means for measuring electric current flow to an electrical appliance and indicates the amount of electrical power consumed by an appliance. In alternative embodiments, the meter is provided as an integral part of an electric wall switch (30) or wall socket (40) or it is built into an electrical appliance (50). In another embodiment, the power meter has a plurality of sockets for receiving the plugs of a number of electrical appliances for separately indicating the power comsumption of each appliance.

Power frequency parameter measuring apparatus

Abstract: An electric power frequency parameter measuring apparatus is improved on the present basic of the digital power meter with a current/voltage changer, a voltage/current changer, a direct current difference amplifier and a plurality of input select switches. The electric power frequency parameter measuring apparatus has multi-functions and can measure voltage, electric current and power. The utility model has the advantages of high precision, low cost, small size, and portability.

Control device for gas-extraction and condensation type turbine

Abstract: PURPOSE:To allow only the lower pressure side of a turbine to absorb variations in power demand caused by increases and decreases in flow rate of extracted gas, by providing a means for increasing and decreasing the flow rate of extracted gas in response to variations in power demand so as to absorb variations in power demand caused. CONSTITUTION:In a power plant having an gas-extraction and condensation type turbine 5, a governor 21 is provided for controlling the pressure at the extraction port 7 of the turbine 5 and the output of a generator 22. With respect to the extraction pressure, the pressure at the extraction port which is detected by a pressure detector 23 provided in an extracted gas line 9 is compared with a desired value, and a correction signal is delivered from the governor 21 to an extracted 988 adjusting valve 8 so as to control the pressure of the pressure at the extraction port 7 in order to make the pressure at the extraction port 7 coincident with the desired value. Meanwhile, as to the power demand, a demand signal is compared, at the governor 21, with an generator output delivered from a power meter 24 so as to deliver a correction signal from the governor 21 to a main stream adjusting valve 4 in order to make the output power of the generator which can code with the power demand signal, thereby it is possible to control the output power of the generator.

Soil coustituent measuring instrument

Abstract: The utility model belongs to the technical field of soil constituent testing, which adopts a colorimetry analyzing method, which is composed of a power supply, a photoelectric source, a color filter, a colorimetry component, a reading electricity meter, etc. A function selecting device is arranged in a shell, the colorimetry component is arranged in the middle part of a photocell component and the function selecting device, the reading electricity meter is arranged on the upper part of the shell, and the soil constituent testing instrument is formed. The utility model has the advantages of simple structure, convenient operation and accurate data testing, etc. compared with the prior art, and the utility model is an advanced testing instrument for agriculture scientific research, production, scientific fertilization and soil improvement.

Improvements relating to commodity measuring meters

Abstract: A commodity measuring meter, more especially an electricity meter (10), in combination with a separate function module (22), between which information is exchanged by generating within one unit a magnetic field which is data modulated and demodulating the field within the other unit to extract the data.

Method for displaying the crossing of the starting-threshold of a static electricity meter

Abstract: In known electricity meters, the power to be measured is converted into a pulse sequence of internal pulses (3) having a power-proportional frequency. The pulses (3) are divided down by means of a divider (5) into pulses (7) having a lower frequency, which cause a light-emitting diode 8 to light up with a flashing frequency which can also be perceived by the eye at limit load. According to the object, it is to be indicated as soon as possible after the electricity meter has been switched on whether a starting threshold is exceeded. This is achieved by an electrical signal (9) being generated after the switching-on, which feeds the light-emitting diode (8) and causes it to light up until the first internal pulses (18) occur.

Electricity, water and gas measuring system

Abstract: The utility model relates to a multiple-way electricity, water and gas measuring system, which adopts the principle which is completely different from the principle of the existing meter number recorder, and uses the sensor with a simple structure to measure the current intensity, the water flow and the airflow velocity of each point. The intensive quantities are converted to electric signals which are sent to a one-chip computer through a multiple-way switch to be directly accumulated respectively, and finally the used time for one time circulation is multiplied so that the flow capacity is directly obtained. Using the technology can realize the dispersed sampling, the concentrated metering and the concentrated display, and can completely replace the existing electricity meter, the water meter and the gas meter, and moreover, the cost is caused to be reduced for 80%. Moreover, the man-power can be saved, and miscellaneous functions can be realized such as time-shared charging function, etc.

Multi-functional small-size meter for automtbile

Abstract: The utility model provides a multi-functional small-size meter for automobile, comprising a sensor, a stroboscopic lamp triggering circuit, a frequency conversion circuit, an inversion circuit, a stroboscopic lamp, an electric meter, a switch, a direct current power supply and a bulb The utility model has the functions of detecting an engine ignition lead angle, an engine speed, a voltmeter, a general table, a lighting lamp, an emergency, lamp, etc The utility model has the advantages of simple structure, small volume and practicable

Light power meter and light coupler manufacturing device using it

Abstract: PURPOSE:To obtain a light power meter which responds repidly and has a wide dynamic range. CONSTITUTION:An electrical signal corresponding to an incident light power is obtained by a light detecting element, is amplified in parallel by a plurality of amplifiers 31-34 with a different amplification factor, and then is converted to a digital signal by an A/D converter. The amplification rate needs not to be switched even when the incident light power is greatly varied by performing amplification in parallel with the amplifiers having a different amplification factor and it is not needed to wait until a circuit is becomes stable, thus resulting in an rapid response.

Method and apparatus for calibration of an electricity meter

Abstract: A meter provides an arrangement for the optional connection of its voltage circuit to a current path or to a calibration system. The arrangement includes an opening, provided in the housing of the meter for inserting a contact device connected to the calibration system, and a pivoting lever. On insertion of the contact device into the opening, the pivoting lever can be moved from an operating position, connecting the voltage circuit to the current path, into a calibration position connecting the voltage circuit to the calibration system. Consequently, the arrangement can be changed over between the operating position and the calibration position with a minimum possible cost.

Demonstrating electric meter with digital display

Abstract: The utility model relates to a demonstrating electric meter with digital display, and can be used for teaching demonstration of various schools. The utility model adopts double-integral type A/D converting circuits, converts analog quantities to digital quantities, and can preserve data. More than four centimeters large-size nixie tubes are driven displaying measuring results by drive circuits. An output end adopts a range expanding circuit, a current-voltage transforming circuit, a resistor-voltage transforming circuit, an alternating current-direct current transforming circuit, and an over-voltage over-current protecting circuit, and can complete functions of measurement, display andprotection of voltages, currents and resistors of alternating currents and direct currents.

Vibration damping switch cupboard

Abstract: The utility model discloses a vibration damping switch cupboard belonging to the supply equipment field. The structure of the vibration damping switch cupboard is that the spring operating mechanism (1) of the vibration damping switch cupboard is arranged on the inner supporting frame (9) of the vibration damping switch cupboard. The knife gate of an isolation switch (2) at the front side of the vibration damping switch cupboard is directed to the leading-in side of an electric source, and the length of the leading-in line of the electric source is shortened. The vibration damping switch cupboard is additionally provided with a voltage mutual inductor (4) and a current mutual inductor (5) with a special purpose of fare charging inside. The utility model has the advantages that the serious vibration of the surface of the vibration damping switch cupboard which is caused by instruments and relays on the surface of the vibration damping switch cupboard during the switching of the spring operating mechanism is reduced, and the accident range is also reduced, while the utility model assures that the normal running fare charging metering can be obtained by a fare charging electrical meter after a fuse box is fused.

Ship used meter

Abstract: The utility model relates to a moving coil type ship used meter which is especially used for wide angle deflection, comprising a DC power ring deflection mechanism and a pointer deflection mechanism which are interlocked. A moving coil and a damping frame are sheathed on a wide-angle circular arc shaped upper guide magnetic loop which is fixed on the support bracket, a working gap is positioned between the upper guide magnetic loop and a lower c-shaped permanent magnet, a corresponding lower guide magnetic loop attached on the c-shaped permanent magnet is communicated with the upper guide magnetic loop, and the poles of the c-shaped permanent magnet are distributed on the upper and the lower surfaces. The utility model overcomes the disadvantages of heavy weight and complex internal structure of the original AC electro magnet electric meter, and meanwhile, the utility model is added with a rating indicating mechanism for bringing convenience to users.

Transmission power controller

Abstract: PURPOSE:To attain transmission power control even with a beacon signal subject to modulation by measuring separately total power sum of a carrier and noise and noise power so as to obtain a signal power to noise power ratio C/N of a reception signal. CONSTITUTION:An antenna 1 receives a beacon signal fed from a satellite and the signal is reproduced at a receiver 4 through a low noise amplifier 2 and a reception frequency converter 3. A BPF 14 extracts a carrier and a signal in the vicinity of it from the reception signal, and a power meter 15 measures the sum of the total power of the carrier and the total power of the noise. A BPF 16 extracts only the noise from the reception signal and a power meter 17 measures the noise power. A C/N computing element 7 calculates and outputs the C/N of the reception signal from the output of the power meters 15,17. As a result, since the carrier power is always constant regardless of modulation/nonmodulation, the transmission power is controlled even from the modulated beacon signal.