CN212872605U

CN212872605U - Integrated relay transformer assembly for electric energy meter

Info

Publication number: CN212872605U
Application number: CN202021710856.5U
Authority: CN
Inventors: 高雷; 胡贤奎
Original assignee: ANHUI YONGAN ELECTRONIC TECHNOLOGY CO LTD
Current assignee: ANHUI YONGAN ELECTRONIC TECHNOLOGY CO LTD
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2021-04-02
Anticipated expiration: 2030-08-17

Abstract

The utility model discloses an integrated relay transformer assembly for an electric energy meter, which comprises a magnetic latching relay, a residual current transformer, an outdoor copper live wire terminal, an indoor live wire terminal, an outdoor zero wire terminal and an indoor zero wire terminal; the magnetic latching relay comprises a leading-out pin A and a leading-out pin B; the residual current transformer comprises a leading-out pin C and a leading-out pin D; the magnetic latching relay is respectively connected with the outdoor fire wire terminal and the indoor fire wire terminal through lead welding through a lead-out pin A and a lead-out pin B; and the residual current transformer is respectively connected with the outdoor zero line terminal and the indoor zero line terminal by lead welding through a lead-out pin C and a lead-out pin D. The utility model discloses a be favorable to improving electrical safety to help improving the electric energy meter measurement precision.

Description

Integrated relay transformer assembly for electric energy meter

Technical Field

The utility model relates to a smart electric meter equipment field especially relates to an integral type relay transformer integrated design.

Background

Magnetic latching relay and current transformer wide use all adopt the discrete structure on the smart electric meter, at present traditional magnetic latching relay and current transformer, perhaps only relay transformer lead welding integrated design with the copper terminal respectively to the contact pin either welds the PVC electronic wire, or welds the contact pin structure, more then relay transformer and copper terminal pass through screwed connection, and the contact pin adopts the PVC electronic wire. The development direction of the next generation of intelligent electric meters is high in metering precision, self-detection function of the metering precision, electric safety, electricity stealing prevention and other functions, and therefore, it is necessary to design an integrated relay and transformer combined piece.

Disclosure of Invention

An object of the utility model is to provide an integral type relay transformer sub-assembly for electric energy meter is favorable to improving electrical safety to help improving the electric energy meter measurement precision.

In order to achieve the above purpose, the utility model adopts the following scheme: an integrated relay and mutual inductor assembly for an electric energy meter comprises a magnetic latching relay, a residual current mutual inductor, an outdoor copper live wire terminal, an indoor live wire terminal, an outdoor zero wire terminal and an indoor zero wire terminal; the magnetic latching relay comprises a leading-out pin A and a leading-out pin B; the residual current transformer comprises a leading-out pin C and a leading-out pin D; the magnetic latching relay is respectively connected with the outdoor fire wire terminal and the indoor fire wire terminal through lead welding through a lead-out pin A and a lead-out pin B; and the residual current transformer is respectively connected with the outdoor zero line terminal and the indoor zero line terminal by lead welding through a lead-out pin C and a lead-out pin D.

The integrated relay mutual inductor assembly for the electric energy meter is connected into a phase line and zero line terminal base of the electric energy meter.

The residual current transformer comprises a coil arranged in a shell, an upper hole and a lower hole are formed in the shell in the center of the coil, and a leading-out pin B of the magnetic latching relay penetrates through the lower hole; the lead-out pin B is perpendicular to the coil.

A lead-out pin D of the residual current transformer penetrates through the upper hole and is connected with the lead-out pin C in a riveting lead welding mode; the lead-out pin D is perpendicular to the coil.

The lead-out pin A is integrally provided with 5 contact pins, namely a contact pin A, a contact pin B, a contact pin C made of manganin, a contact pin D made of manganin and a contact pin E; a contact pin F is integrally formed on a leading-out pin C of the residual current transformer; and the contact pin A, the contact pin B and the contact pin F are used as power supply contact pins of an internal circuit board of the electric energy meter.

And the pin E is used as a self-detection pin of the metering chip.

The utility model discloses the during operation, residual current transformer flows in simultaneously and flows live wire and zero line electric current, if live wire or zero line electric current unbalance appear, corresponding secondary current can be responded to the residual current transformer secondary side, and whether there is the electrical safety problem in the analysis of the metering chip circuit in the electric energy meter, for example the electric wire breaks the skin electric leakage, whether there is the people for stealing the electric phenomenon. The utility model discloses can promote structural reliability, realize measurement accuracy self-checking function, electric safety prevents to steal functions such as electric.

Drawings

Fig. 1 is an overall structure diagram of the integrated relay-transformer assembly for an electric energy meter of the present invention;

fig. 2 is a top view of the integrated relay-transformer assembly for an electric energy meter according to the present invention;

fig. 3 is a bottom view of the integrated relay-transformer assembly for an electric energy meter according to the present invention;

fig. 4 is a structure diagram of a magnetic latching relay of the integrated relay transformer assembly for the electric energy meter of the present invention;

fig. 5 is a structural diagram of a residual current transformer in the utility model;

FIG. 6 is a schematic diagram of the internal structure of the residual current transformer

FIG. 7 is a schematic diagram of the mating of the residual current transformer coil with the upper and lower holes;

fig. 8 is an electrical connection schematic diagram of the integrated relay transformer assembly for the electric energy meter according to the present invention.

Detailed Description

The following describes the embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1 to 8, the integrated relay and transformer assembly for an electric energy meter of the present embodiment includes a magnetic latching relay 10, a residual current transformer 20, an outdoor live wire terminal 30, an indoor live wire terminal 31, an outdoor neutral terminal 32, and an indoor neutral terminal 33, which are made of copper; the magnetic latching relay 10 comprises a leading-out pin A101 and a leading-out pin B102; the residual current transformer 20 comprises a pin C201 and a pin D202; the magnetic latching relay 10 is respectively connected with the outdoor fire wire terminal 30 and the indoor fire wire terminal 31 through lead-out pins A101 and B102 in a lead welding manner; the residual current transformer 20 is connected with the outdoor zero line terminal 32 and the indoor zero line terminal 33 through lead welding respectively through a lead pin C201 and a lead pin D202.

As can be seen in fig. 5, 6 and 7, the residual current transformer 20 comprises a coil 200 arranged in a housing, the housing in the center of the coil 200 is provided with an upper hole 203 and a lower hole 204, and the leading pin B102 of the magnetic latching relay 10 passes through the lower hole 204. The pin B102 is perpendicular to the coil 200.

And a lead-out pin D202 of the residual current transformer 20 penetrates through the upper hole 203 and then is riveted and lead-welded with the lead-out pin C201. The lead pin D202 is perpendicular to the coil 200.

The magnetic latching relay 10 is a circuit switching device widely used in electric energy meters, and realizes the disconnection and connection of a circuit. The residual current transformer 20 is a current size measuring device widely used in electric energy meters; the outdoor live and

neutral terminals

30 and 32 are connected to outdoor live and neutral wires, and the indoor live and

neutral terminals

31 and 33 are connected to indoor live and neutral wires.

As can be seen in fig. 8, a single-phase current flows from the outdoor live wire through the outdoor live wire terminal 30 from the magnetic latching relay 10 to the indoor live wire terminal 31 into the indoor live wire, and after passing through the electric load, the current flows from the indoor neutral wire through the indoor neutral terminal 33, through the residual current transformer 20 to the outdoor neutral terminal 32, and into the outdoor neutral wire.

Therefore, the residual current transformer 20 simultaneously flows into and flows out live wire and zero line current, the current is equal in size but opposite in direction, if the live wire or zero line current is unbalanced, corresponding secondary current can be induced on the secondary side of the residual current transformer 20, and whether the electric safety problem exists can be analyzed through a metering chip circuit in the electric energy meter, for example, whether the electric wire is damaged or leaks electricity, and whether the phenomenon of electricity stealing is caused by people.

Specifically, the method comprises the following steps: a lead-out pin D202 of the residual current transformer 20 penetrates through the upper hole 203 and then is connected with an indoor zero line terminal 33 in a lead welding mode; the leading-out pin B102 of the magnetic latching relay 10 passes through the lower hole 204 and then is connected with the indoor hot wire terminal 31 in a lead welding mode; the currents passing through are normally equal and in opposite directions, and the current on the primary side of the residual current transformer 20 is zero. The ratio of the primary side current to the secondary side current of the residual current transformer 20 is I1: I2=30mA:30 uA. The early warning mechanism is triggered when the following conditions occur: firstly if the electricity phenomenon is stolen to the emergence, for example the user is the zero direct external outdoor zero line of heavy load, through side live wire current > zero line current on one side of residual current transformer 20 like this, the current of the corresponding proportion can be responded to residual current transformer 20's secondary side, the voltage of corresponding electric current size can be sampled out to smart electric meter metering module, smart electric meter can intelligent judgement exist steal the electricity and upload intelligent management platform and break-out the power supply. Secondly if the phenomenon of skin breaking and leakage of the electric wire from the indoor live wire to the electric load end, the live wire current on the primary side of the residual current transformer 20 is larger than the zero line current, the current of the corresponding proportion can be induced on the secondary side of the residual current transformer 20, the voltage of the corresponding current can be sampled by the intelligent electric meter metering module, and the intelligent electric meter can intelligently judge the skin breaking and leakage and upload the intelligent management platform and break the switch. In the technical scheme, the current imbalance of 30mA and 30mA (5% -100%) can be detected.

The magnetic latching relay 10 is characterized in that 5 pins, namely a pin A101_1, a pin B101_2, a pin C101_3, a pin D101_4 and a pin E101_5 are integrally formed on a pin A101 of the magnetic latching relay 10; the pin B102 is provided with 1 pin G102_1 which is integrally formed. The lead-out pin C201 of the residual current transformer 20 is integrally provided with 1 contact pin F201_ 1.

A contact pin A101_1 and a contact pin B101_2 on the magnetic latching relay 10 and a contact pin F201_1 on the residual current transformer 20 are used as power supply contact pins of an internal circuit board of the electric energy meter. The contact pin C101_3 and the contact pin D101_4 on the magnetic latching relay 10 are manganese-copper integrated lead-out pins, the resistance value is between 180 and 300 microohms, when current flows, a voltage signal is generated on the pins, and the power consumption of a user can be calculated through an internal metering circuit of the electric energy meter.

If the electric safety and electricity stealing phenomena occur, the circuit can be switched off by the magnetic latching relay 10.

The utility model discloses in, combine newest ammeter measurement chip and hardware circuit, magnetic latching relay 10 increases a contact pin E101_5 as the self-checking contact pin of measurement chip, and conventional general relay does not have the self-checking contact pin design. The pin B102 led out from the magnetic latching relay 10 penetrates through the residual current transformer 20, and the design achieves electrical safety by detecting the phase zero line current difference and has the function of preventing electricity stealing.

The above description is only one of the embodiments of the present invention, and is not intended to limit the present invention, and all the modifications, changes and equivalent changes made by the technical entity to the above embodiments all belong to the protection scope of the present invention.

Claims

1. An integrated relay and transformer assembly for an electric energy meter comprises a magnetic latching relay (10), a residual current transformer (20), an outdoor copper live wire terminal (30), an indoor live wire terminal (31), an outdoor zero line terminal (32) and an indoor zero line terminal (33); the method is characterized in that: the magnetic latching relay (10) comprises a leading-out pin A (101) and a leading-out pin B (102); the residual current transformer (20) comprises a pin C (201) and a pin D (202); the magnetic latching relay (10) is respectively connected with the outdoor fire wire terminal (30) and the indoor fire wire terminal (31) through lead welding by virtue of a lead pin A (101) and a lead pin B (102); the residual current transformer (20) is respectively connected with the outdoor zero line terminal (32) and the indoor zero line terminal (33) through lead welding through a lead-out pin C (201) and a lead-out pin D (202).

2. The integrated relay-transformer assembly for electric energy meters according to claim 1, characterized in that: the residual current transformer (20) comprises a coil (200) arranged in a shell, an upper hole (203) and a lower hole (204) are formed in the shell in the center of the coil (200), and an outgoing pin B (102) of the magnetic latching relay (10) penetrates through the lower hole (204); the lead-out pin B (102) is perpendicular to the coil (200).

3. The integrated relay-transformer assembly for electric energy meters according to claim 2, characterized in that: a lead-out pin D (202) of the residual current transformer (20) penetrates through the upper hole (203) and then is riveted and lead-welded with the lead-out pin C (201); the lead-out pin D (202) is perpendicular to the coil (200).

4. The integrated relay-transformer assembly for electric energy meters according to claim 1, characterized in that: the lead-out pin A (101) is integrally provided with 5 contact pins, namely a contact pin A (101 _ 1), a contact pin B (101 _ 2), a contact pin C (101 _ 3) made of manganin, a contact pin D (101 _ 4) made of manganin and a contact pin E (101 _ 5); a pin F (201 _ 1) is integrally formed on a pin C (201) of the residual current transformer (20); and the pin A (101 _ 1), the pin B (101 _ 2) and the pin F (201 _ 1) are used as power supply pins of an internal circuit board of the electric energy meter.

5. The integrated relay-transformer assembly for electric energy meters according to claim 4, characterized in that: the pin E (101 _ 5) is used as a self-detection pin of the metering chip.