CS241301B1

CS241301B1 - Connection of universal electronic pilot frequency source for regulation and calibration of meters

Info

Publication number: CS241301B1
Application number: CS812691A
Authority: CS
Inventors: Stefan Rapant
Original assignee: Stefan Rapant
Priority date: 1981-04-09
Filing date: 1981-04-09
Publication date: 1986-03-13
Also published as: CS269181A1

Abstract

Zapojenie univerzálneho elektronického zdroja pilotnej frekvencie k regulovaniu a ciachovaniu elektromerov je zdrojom pilotnej frekvencie v zariadeniach pre regulovanie, preskúšavanie, ciachovanie a testovanie všetkých druhov a typov elektromerov, ktoré umožňuje na základe nastavenej hodnoty záťaže skúšaného elekromeru pomocou ciachovacej stanice vytvoriť takú vý- stupnú frekvenciu, ktorá zodpovedá požadovanému počtu impulzov na 1 otáčku skú šaného elektroměru.The connection of a universal electronic pilot frequency source to the regulation and calibration of electricity meters is a pilot frequency source in devices for regulating, checking, calibrating and testing all kinds and types of electricity meters, which allows, based on the set load value of the tested electricity meter, to create an output frequency using a calibration station that corresponds to the required number of pulses per 1 revolution of the tested electricity meter.

Description

Vynález rieši zapojenie univerzálneho elektrického zdroja pilotnej frakvencie k regulovaniu a ciachovaniu elektromerov, ktoré pri ciachovaní a regulovaní elektromerov nahradí všetky používané elektromechanické jednorozsahové zdroje pilotnej frekvencie.The invention solves the connection of a universal electric source of pilot fraction to the regulation and calibration of electricity meters, which replaces all used electromechanical single-range sources of pilot frequency when calibrating and controlling electricity meters.

Zdroje pilotnej frekvencie sa používajú pri regulovaní a ciachovaní elektromerov. Pre zvýšenie produktivity práce a automatizáciu týchto práč sú používané elektromechanické zdroje pilotnej frekvencie, u ktorých sa vyžaduje 1000 impulzov na jednu otáčku regulovaného připadne ciachovaného elektromera — skúšanca. Ako zdroje pilotnej frekvencie sú dodnes v CSSR i v zahraničí používané klasické elektroměry — pilotné elektroměry, s 1 000 značkami na obvode kotúča, připadne iným počtom značiek. Takýto pilotný elektroměr je však schopný použitia iba pre jeden druh skúšanca, v závislosti od konštanty elektromera — otáčky/kWh.Pilot frequency sources are used to control and calibrate electricity meters. Electromechanical sources of pilot frequency, which require 1000 pulses per revolution of controlled or calibrated electrometer - examiner, are used to increase labor productivity and automate these works. As a source of the pilot frequency are still used today in CSSR and abroad classic electricity meters - pilot meters, with 1,000 marks on the circumference of the disc, or a different number of marks. However, such a pilot meter is only capable of being used for one type of tester, depending on the meter constant - rpm / kWh.

V důsledku uvedeného je doteraz potřebný pre každý druh skúšaného elektromera samostatný pilotný elektroměr, ktorý vo všetkých vybraných bodoch záťaže stanovených ČSN normou je naregulovaný na minimálnu chybu blížiacu sa k + 0.As a result of this, a separate pilot electricity meter is required for each type of meter being tested, which is regulated to a minimum error approaching + 0 at all selected load points specified by the ČSN standard.

Hoře uvedené nedostatky súčasného stavu získavania pilotnej frekvencie pre regulován,ie a ciachovanie elektromerov sú odstránené zapojením univerzálneho elektronického zdroja pilotnej frekvencie, ktorého podstata spočívá v tom, že do sekundárného okruhu přístrojových transformátorov ciachovacej stanice sú zapojené meracie přístroje a elektronický převodník striedavého elektrického výkonu na jednosměrný prúd, na výstup ktorého je zapojený převodník jednosměrného prúdu na jednosměrné napatie, na výstup ktorého· je připojený elektronický převodník jednosměrného napatia na frekvenciu, ktorého je výstup zapojený do deliča frekvencie.The above-mentioned shortcomings of the current state of acquisition of the pilot frequency for the control, calibration and calibration of electricity meters are eliminated by the connection of a universal electronic pilot frequency source, which consists in the measurement circuit and electronic converter of AC to DC the output to which the DC-to-DC converter is connected, to the output of which the electronic DC-to-frequency converter is connected, the output of which is connected to the frequency divider.

Zapojením univerzálneho elektronického zdroja pilotnej frekvencie k regulovaniu a ciachovaniu elektromerov podl'a vynálezu sa nahradia všetky doteraz potřebné typy a druhy pilotných elektromerov jedno i trojfázových. Vhodnou volbou odbočky přepínatelných prevodov přístrojových transformátorov ciachovacej stanice, prevodníka jednosměrného prúdu na jednosměrné napátia a deliča frekvencie sa dosiahnu všet-By connecting a universal electronic pilot frequency source to the regulation and calibration of the electricity meters according to the invention, all the previously needed types and types of pilot electricity meters, both single and three-phase, are replaced. By suitable selection of the tap changers of the calibration transformers of the calibration station, the DC / DC converter and the frequency divider all

Claims

SUBJECT

Connection of universal electronic source of pilot frequency to regulation and calibration of electricity meters, characterized in that the secondary circuit of instrumentation transformers (1) of the calibration station are connected with measuring instruments (2) and electronic converter (3) of alternating electric frequency . The particularly advantageous properties of the proposed circuitry in the invention allow very quickly ^: converting the output frequency and setting the error in all ranges and load points to + 0 with a single adjustment element.

The connection according to the invention allows the automatic calibration of all kinds and types of meters, which increases productivity and accuracy several times over the previous calibration method.

An example of wiring a universal electronic pilot frequency source to control and calibrate electricity meters is shown in the block diagram.

The universal pilot frequency source for regulating and calibrating the electricity meters consists of a secondary circuit of the instrumentation transformers 1 of the calibration station, the output of which is connected to meters 2 and an electronic converter 3 of alternating electric power to DC. to the output of which the electronic converter 5 of the DC voltage to the frequency is connected, the output of which is connected to the frequency divider 6.

The calibration station with the instrumentation transformers 1 of the calibration station is set to the desired load range of the tester by means of measuring instruments 2, thereby simultaneously applying a power load to the electronic converter 3 of alternating electric power to direct current. This DC output current is fed to the DC converter 4, where the step-by-step and continuous fine-tuning is set to a value of current-to-voltage converter so that the output voltage applied to the electronic converter 5 of the DC-to-frequency converter is output. a frequency that, after dividing the desired ratios in the integrated frequency divider 6, outputs a frequency corresponding to the desired number of pulses per revolution of the examiner.

Use of the subject matter of the invention is possible in devices for regulating, calibrating and attesting the measuring properties of all kinds and types of meters.

OF THE INVENTION to a DC power output to which a DC converter (4) is connected to a voltage output of which an electronic DC voltage converter (5) is connected to an output of which is connected to a frequency divider (6).