CN200996978Y - Special electronic electric-energy meter for distributing transformer - Google Patents

Special electronic electric-energy meter for distributing transformer Download PDF

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Publication number
CN200996978Y
CN200996978Y CN 200720017634 CN200720017634U CN200996978Y CN 200996978 Y CN200996978 Y CN 200996978Y CN 200720017634 CN200720017634 CN 200720017634 CN 200720017634 U CN200720017634 U CN 200720017634U CN 200996978 Y CN200996978 Y CN 200996978Y
Authority
CN
China
Prior art keywords
electric energy
energy meter
meter
gauge stand
watchcase
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN 200720017634
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Chinese (zh)
Inventor
荣博
汪立华
于红芹
陈京博
赵振晓
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZIBO JIBAO MUTUAL INDUCTOR INST
Original Assignee
ZIBO JIBAO MUTUAL INDUCTOR INST
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZIBO JIBAO MUTUAL INDUCTOR INST filed Critical ZIBO JIBAO MUTUAL INDUCTOR INST
Priority to CN 200720017634 priority Critical patent/CN200996978Y/en
Application granted granted Critical
Publication of CN200996978Y publication Critical patent/CN200996978Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

An electric energy meter specially used for the distribution transformer comprises a meter case and a dash board; the meter case is packed and sealed with the metering part which is composed of the counter and the measuring function plate. The electric energy meter is characterized in that the meter stand (3) is jointed with the meter case (1) and arranged with the attached hole (4), which matches the secondary side end of the transformer. The attached hole (4) is installed with the current transducer (5) and the voltage lug (6). Inside the meter stand (3), the current transducer (5) and the voltage lug (6) are connected with the measuring function plate via the lead wire.

Description

Substation transformer special electronic formula electric energy meter
Technical field
The utility model relates to a kind of substation transformer special electronic formula electric energy meter, belongs to the electric power metering device field.
Background technology
Transformer is the indispensable equipment of power supply, how much finishes metering by electric power meter for, electricity consumption.At present, the metering of electric system regulation 315kVA and above transformer is an III class measuring apparatus, is called massive quantity power supply and measurement.The metering of 250kVA and following transformer is an IV class measuring apparatus, is called high for low meter.In the high metering method for low meter, measuring apparatus is installed in the secondary side of transformer, is made up of mutual inductor and electric energy meter, tested voltage can directly insert electric energy meter, electric current then needs to be transformed into by current transformer the standard signal of 5A, inserts electric energy meter, realizes the metering of electric energy.Substation transformer is many with the big factor of the good bad influence amount of performance of electric power meter, wiring complexity, the accurate and anti-electricity-theft difficulty of having brought of just giving electric energy metrical.In addition, owing to the reasons such as meter characteristic of mutual inductor and electric energy meter, underload or overload time error can increase, and make the meter characteristic of the electric power meter of mutual inductor and electric energy meter composition be subjected to certain limitation, and underload hourglass quantity calculation is inevitable.For this reason, the electric specialty technician has released many raising metering performances and has prevented the measure of stealing, not only needs substantial contribution input and relative measures, makes troubles to management, and can not tackle the problem at its root.In addition, existing electric energy meter is to sample by the copper-manganese resistance in the terminal board, moment excess current or long-time the use after be prone to the contact contact resistance and increase and cause that error increases, " burning the table tail " phenomenon can appear.
The utility model content
The technical problems to be solved in the utility model provide a kind of have anti-electricity-theft, damage, energy-conservation, anti-leak-stopping quantity calculation, the substation transformer special electronic formula electric energy meter that measuring accuracy is high fall.
The technical scheme that its technical matters that solves the utility model adopts is: this substation transformer special electronic formula electric energy meter, comprise watchcase and dash board, the table meter part that the inner encapsulation of watchcase is made up of register and function of measuring plate, it is characterized in that: the gauge stand that links to each other with watchcase is set, the suit hole that gauge stand setting and Circuit Fault on Secondary Transformer terminal position adapt, current sensor and voltage lug plate are installed in the suit hole, and current sensor is connected function of measuring plate by lead in gauge stand inside with the voltage lug plate.
Gauge stand is installed on the terminal of substation transformer secondary side, and substation transformer secondary side terminal passes the suit hole and is connected with the voltage lug plate.Take out voltage signal.The miniature current sensor of installing in the suit hole of gauge stand takes out current signal.Voltage signal and current signal insert table meter part by the gauge stand inner lead, realize electric energy metrical.
Gauge stand and watchcase are made as one.Be convenient to install and use.
Gauge stand and watchcase split connect by K dress cable.Be fit to different occasions.By K dress cable transmission detection signal.
The function of measuring plate also can be provided with 485 interfaces, 232 interfaces or pulse output interface.Be used for centralized automatic meter-reading.
Compared with prior art, the beneficial effect that the utility model substation transformer special electronic formula electric energy meter has is: by the gauge stand that adapts with substation transformer secondary side terminal is set, in the suit hole of gauge stand miniature current sensor and lug plate are set, do not need the outer special-purpose mutual inductor of joining, electric weight directly reads, cancellation secondary circuit contact, thereby reduced artificial error in dipping, avoid the people to cause electric quantity loss and join metering dead angle section that mutual inductor brings and leakage quantity calculation problem that underload causes, improved measuring accuracy, fallen that to decrease effect obvious; Copper-manganese shunt resistance Rs in miniature current sensor and the function of measuring plate appropriate design alternative electric energy table does not burn table tail phenomenon.Has following advantage simultaneously: 1, be directly installed on the secondary connection terminal of substation transformer owing to electric energy meter, take out normalized current by miniature current sensor, the current return contactless, wrong no-load voltage ratio, error connection, the wrong number of turn outage hydraulic circuit of traditional electric energy meter have been stopped, the enforcement of electricity filching means such as short secondary loop of mutual inductor; 2, " do not burn the table tail ", increased the serviceable life of electric energy meter, highly sensitive graph of errors characteristic is good, and starting current Iq is little, does not have the metering dead angle.Facts have proved, under the situation identical, count the electric weight of 1.5%-2% more, reduced the leakage quantity calculation that the metering performance because of electric energy meter causes, improved metering performance than common electrical minor electric energy meter with common electrical minor electric energy meter error; 3, wide load, in the range of current of rated current 0.05Ib to 12Ib, graph of errors is straight, is better than the GB accuracy requirement.4, install simply, only need that gauge stand is installed in substation transformer secondary side terminal and get final product, no error connection, wrong polarity, the phenomenon of misphase preface takes place, and the electric weight register just is and changes, and avoids the people can effectively prevent ammeter " reversing " again for causing gross error; 5, energy-conservation, the current sampling loop does not almost have power consumption, compare with the ordinary electronic electric energy meter, and every about 8.4kWh of electric energy meter year economize on electricity, thus save measuring cost; 6, because voltage, current acquisition part and table meter part all are encapsulated in gauge stand and watchcase inside, stop the generation of stealing electricity phenomenon, reduced because of therefore the investment of taking measures of anti-stealing electricity reaches and made troubles, and shockproof, waterproof, anti-tampering, anti-overvoltage, excess current, error is stable is excused from a college course accent, can outdoor application.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the circuit theory diagrams of the utility model embodiment.
Fig. 1-2 is the most preferred embodiment of the utility model substation transformer special electronic formula electric energy meter.
Wherein: 1 watchcase, 2 dash boards, 3 gauge stands, 4 suit holes, 5 current sensors, 6 voltage lug plates;
U1 register U2 function of measuring plate CTA, CTB, CTC current sensor Ua, Ub, Uc, U0 voltage lug plate.
Embodiment
Be described further below in conjunction with Fig. 1,2 pairs of the utility model substation transformer special electronic formula electric energy meters.
As shown in Figure 1, the structure that is connected to one of watchcase 1 and gauge stand 3.Watchcase 1 front is provided with dash board 2, the table meter part that watchcase 1 inner encapsulation is made up of register and function of measuring plate.Watchcase 1 bottom is provided with gauge stand 3, gauge stand 3 is provided with the suit hole 4 that adapts with substation transformer secondary side terminal position, current sensor 5 and voltage lug plates 6 are installed in the suit hole 4, current sensor 5 and voltage lug plate 6 by lead at the gauge stand 3 inner function of measuring plates that are connected in the watchcase 1.
Gauge stand 3 is installed on the terminal of substation transformer secondary side, and substation transformer secondary side terminal passes suit hole 4 and is connected with voltage lug plate 6.Take out voltage signal.The miniature current sensor of installing in the suit hole 4 of gauge stand 35 takes out current signal.Voltage signal and current signal insert table meter part by gauge stand 3 inner leads, realize electric energy metrical.
Gauge stand 3 and watchcase 1 can also be made split-type structural, adopt K dress cable to connect between the two.Being fit to be installed in different occasions uses.
As shown in Figure 2, the course of work is: voltage lug plate Ua, Ub, Uc, U0 are separately positioned on to be attached thereto on the substation transformer secondary side terminal and connect, and obtain voltage signal; Miniature current sensor CTA, CTB, CTC are separately positioned on substation transformer secondary side terminal A, B, the C three-phase line, obtain current signal.Electric current, voltage signal input function of measuring plate U2, function of measuring plate U2 is transported to register U1 with the result.
Function of measuring plate U2 and register U1 adopt original electric energy meter parts.The current acquisition input circuit adopts the large velocity ratio micro-transformer of current of particular design as sensor, substitute traditional copper-manganese shunt resistance resistance R s, electric current input circuit as electric energy meter, the alternating current of tens peaces and even hundreds of peace is transformed into milliampere electric current of level sends into function of measuring plate U2, as the standard signal that can power and to measure.
This substation transformer special electronic formula electric energy meter structure and input mode have changed the structure of traditional electric energy meter, have remedied the shortcoming of common electrical minor electric energy meter simultaneously.

Claims (4)

1, substation transformer special electronic formula electric energy meter, comprise watchcase and dash board, the table meter part that the inner encapsulation of watchcase is made up of register and function of measuring plate, it is characterized in that: the gauge stand (3) that links to each other with watchcase (1) is set, gauge stand (3) is provided with the suit hole (4) that adapts with the Circuit Fault on Secondary Transformer terminal position, current sensor (5) and voltage lug plate (6) are installed in the suit hole (4), and current sensor (5) is connected function of measuring plate by lead in gauge stand (3) inside with voltage lug plate (6).
2, substation transformer special electronic formula electric energy meter according to claim 1, it is characterized in that: gauge stand (3) is installed on the terminal of substation transformer secondary side, and substation transformer secondary side terminal passes suit hole (4) and is connected with voltage lug plate (6).
3, substation transformer special electronic formula electric energy meter according to claim 1 is characterized in that: gauge stand (3) is made as one with watchcase (1).
4, substation transformer special electronic formula electric energy meter according to claim 1 is characterized in that: gauge stand (3) and watchcase (1) split connect by K dress cable.
CN 200720017634 2007-01-17 2007-01-17 Special electronic electric-energy meter for distributing transformer Expired - Lifetime CN200996978Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200720017634 CN200996978Y (en) 2007-01-17 2007-01-17 Special electronic electric-energy meter for distributing transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200720017634 CN200996978Y (en) 2007-01-17 2007-01-17 Special electronic electric-energy meter for distributing transformer

Publications (1)

Publication Number Publication Date
CN200996978Y true CN200996978Y (en) 2007-12-26

Family

ID=38995413

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200720017634 Expired - Lifetime CN200996978Y (en) 2007-01-17 2007-01-17 Special electronic electric-energy meter for distributing transformer

Country Status (1)

Country Link
CN (1) CN200996978Y (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109917165A (en) * 2019-02-27 2019-06-21 南京电研电力自动化股份有限公司 A kind of intelligent electricity anti-theft system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109917165A (en) * 2019-02-27 2019-06-21 南京电研电力自动化股份有限公司 A kind of intelligent electricity anti-theft system

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C14 Grant of patent or utility model
CX01 Expiry of patent term

Granted publication date: 20071226

EXPY Termination of patent right or utility model