3 edition of American National Standard Requirements for Watthour Meter Sockets (Ansi) found in the catalog.
American National Standard Requirements for Watthour Meter Sockets (Ansi)
January 1997 by Institute of Electrical & Electronics Enginee .
Written in English
|The Physical Object|
|Number of Pages||32|
The frequency of pulses indicates the power demand. Historically, rotating meters could report their metered information remotely, using a pair of electrical contacts attached to a KYZ line. However, modern tamper-resistant meters can detect and bill it at standard rates. Lower power magnets can add to the drag resistance of the internal disk resistance magnets.
Current transformers permit the meter to be located remotely from the current-carrying conductors. Meter reading is now sometimes subcontracted and in some areas the same person may read gaswater and electricity meters at the same time. This also has the responsibility of communication using various protocols and interface with other addon modules connected as slaves to it. Meters may also measure VAR-hours the reflected loadneutral and DC currents elevated by most electrical tamperingambient magnetic fields, etc. A phantom loop connection via an earth ground is often much higher resistance than the metallic neutral connector. Home energy monitoring[ edit ] Main article: Home energy monitor A potentially powerful means to reduce household energy consumption is to provide convenient real-time feedback to users so they can change their energy using behaviour.
In many other countries the supply and load terminals are in the meter housing itself. Since all power phases are relative to the neutral in this system, if the neutral is disconnected, it can be directly measured. There are two forms: three wire, or four wire with a system neutral. The meter base for a 1s is also wired differently than a 2s. The most common use for the 1s meter now is for sign services which only require v. Some utilities allow residential customers to pay hourly rates, such as in Illinois, which uses day ahead pricing.
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Magnets can also saturate current transformers or power-supply transformers in electronic meters, though countermeasures are common. Meters may also measure VAR-hours the reflected loadneutral and DC currents elevated by most electrical tamperingambient magnetic fields, etc.
The final resort is for the disputed meter to be fully tested both in the installed location and at a specialist calibration laboratory. Newer computerised meters usually have counter-measures against tampering.
In some cases, prepayment meters have not been accepted by customers. In South AfricaSudan and Northern Ireland prepaid meters are recharged by entering a unique, encoded twenty digit number using a keypad. Learn More in these related Britannica articles:. These outputs usually follow the DIN standard.
Web resources can also be used, if an estimate of the power consumption is enough for the research purposes. This makes the tokens, essentially a slip of paper, very cheap to produce.
Some industrial meters use a protocol for programmable logic controllers Modbus or DNP3. However, an untrained eye may not catch this difference and install a form 2s meter by accident.
This meter is most commonly used in a v, single phase three wire service. Modern solid-state electricity meters, in conjunction with smart cardshave removed these disadvantages and such meters are commonly used for customers considered to be American National Standard Requirements for Watthour Meter Sockets book poor credit risk.
One disadvantage of this system is that if the safety earth fails, it is difficult to discover this by direct measurement, because no phase has a voltage relative to earth. Any significant error in the registered energy can represent a loss to the American National Standard Requirements for Watthour Meter Sockets book supplier, or the consumer being over billed.
AMR Automated Meter Reading meters often have sensors that can report opening of the meter cover, magnetic anomalies, extra clock setting, glued buttons, inverted installation, reversed or switched phases etc.
The most common use for this meter and the only one that I recommend using for new installations is in a 3 wire delta service. Communication methods[ edit ] Remote meter reading is a practical example of telemetry.
Around the world, experiments are going on, especially in developing countries, to test pre-payment systems. Some combinations of capacitive and inductive load can interact with the coils and mass of a rotor and cause reduced or reverse motion. Nevertheless, a sizeable number of properties do not have the option of gas, with many in rural areas being outside the gas supply network, and others being expensive upfront to upgrade to a radiator system.
They can be used on 3 wire delta three phase services as well as single phase services that are pulled off of a three phase transformer. Form 4s. While this can be used to automatically control usage on the part of the customer resulting in automatic load controlit is often simply the customer's responsibility to control his own usage or pay accordingly voluntary load control.
Lower power magnets can add to the drag resistance of the internal disk resistance magnets. The largest source of long-term errors in the meter is drift in the preamp, followed by the precision of the voltage reference.
This exported energy may be accounted for in the simplest case by the meter running backwards during periods of net exportthus reducing the customer's recorded energy usage by the amount exported. Since it is typically not cost effective to store significant amounts of electricity during a period of low demand for use during a period of high demand, costs will vary significantly depending on the time of day.
Many smart meters now include a switch to interrupt or restore service. The counter is connected to the rotor and adds and displays the amount of power the circuit has carried based on the number of revolutions of the rotor.1. The meter sockets shall meet Company specifications, see Appendix A.
2. Working space in front of service entrance equipment and meter sockets shall be in accordance with NEC Section Refer to page 21 for Meter Clearances. 3. When using aluminum conductors, wire brush the conductors and apply oxide inhibitor on all connections.
4. FACILITIES INSTRUCTIONS, STANDARDS, AND TECHNIQUES Volume WATT-HOUR METER MAINTENANCE AND TESTING Internet Version of This Manual Created December FACILITIES ENGINEERING BRANCH DENVER OFFICE DENVER, COLORADO The Appearance of The Internet Version of This Manual May Differ From the Original, but the Contents Do Not.
Watt-hour meter, device that measures and records over time the electric power flowing through a circuit. Although there are several different types of watt-hour meters, each consists essentially of a small electric motor and a counter.
A precise fraction of the current flowing .Aug 24, · Who makes the best meter pdf or are they all about the same?
pdf testing shall be in accordance with the American National Standards Institute (ANSI) C, Requirements for Watthour Meter Sockets, latest revision. The meter socket housing shall be fabricated of steel, or aluminum in accordance with U/L Standardlatest revision and.DIAGRAM SECTIDII WIRING DIAGRAMS FOR WATTHOUR Download pdf (Rear View)-(Continued) II H• 8 A H G 81 AI D1 Cl J 5# l ti J I H G 0 c 8 A R5 C2 Cl2 R6 R4 Cl Gil R5 s'* iii(II HI 01 iftil Cl 81 AI To R6 C3 Cl3 R4 Alarm Fig.
Wiring Diagram R-3 Varhour.Meter ebook, or the form ebook on an electric meter are the numbers that help us as meter techs determine what type of meter should go in a particular service.
There are a variety of form numbers that are used. There are also basically two types of services that metering installation will have. The most common is self-contained.