CN208672693U - Electronic electric energy meter - Google Patents
Electronic electric energy meter Download PDFInfo
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- CN208672693U CN208672693U CN201820681208.8U CN201820681208U CN208672693U CN 208672693 U CN208672693 U CN 208672693U CN 201820681208 U CN201820681208 U CN 201820681208U CN 208672693 U CN208672693 U CN 208672693U
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Abstract
A kind of electronic electric energy meter, its power circuit includes A phase sample circuit, B phase sample circuit, C phase sample circuit, A phase sample circuit is connected with the armature winding of transformer TC1, C phase sample circuit is connected with the armature winding of transformer TC3, and the primary windings connected in series of the armature winding of transformer TC3 and transformer TC1, the secondary windings of transformer TC3 is connected with the secondary windings of transformer TC1 by being shorted point J25, B phase sample circuit and C phase sample circuit are connected with the both ends of the armature winding of transformer TC3 respectively, or, B phase sample circuit is connected with the armature winding of transformer TC2 and the zero line side of electric energy meter and C phase sample circuit are connected with the both ends of the armature winding of transformer TC3 respectively, by by the secondary windings of transformer TC1 and transformer T The secondary windings of C3 is connected, and any two-phase of three phases electronic energy meter is made to power on the normal work that can guarantee electric energy meter.
Description
Technical field
The utility model relates to electrical energy measurement field, especially a kind of electronic electric energy meter.
Background technique
Electronic electric energy meter is to carry out various judgements, processing and fortune to digitized measurand using processor as core
It calculates, to realize multiple functions.It is powered on however, the electronic electric energy meter of existing phase three-wire three depressor is not able to satisfy any two-phase
The requirement that can work normally afterwards, so that electronic electric energy meter is there are wiring inconvenience, energy consumption is higher and loads larger etc.
Problem.
Utility model content
The purpose of the utility model is to overcome the defect of the prior art, provide that a kind of structure is simple, electricity of easy-to-connect
Minor electric energy meter.
To achieve the above object, the utility model adopts the technical scheme that
A kind of electronic electric energy meter, including power circuit, the power circuit include that A phase sample circuit 1, B phase sample
The armature winding of the transformer TC1 of circuit 2, C phase sample circuit 3 and rectification circuit 4, the A phase sample circuit 1 and electric energy meter
It is connected, the secondary windings of the transformer TC1 is connected with rectification circuit 4, the C phase sample circuit 3 and electric energy meter
The armature winding of transformer TC3 is connected, and the secondary windings of the transformer TC3 is connected with rectification circuit 4, and transformer
The primary windings connected in series of the armature winding of TC3 and transformer TC1, the secondary windings of transformer TC3 and transformer TC1 it is secondary around
Group is connected by being shorted point J25, the B phase sample circuit 2 and C phase sample circuit 3 armature winding with transformer TC3 respectively
Both ends be connected, alternatively, B phase sample circuit 2 be connected with the armature winding of the transformer TC2 of electric energy meter and electric energy meter zero
Line end and C phase sample circuit 3 are connected with the both ends of the armature winding of transformer TC3 respectively, the secondary windings of transformer TC2 with
Rectification circuit 4 is connected.
Preferably, the second pin of the transformer TC1 is connected and is grounded with the second pin of transformer TC3, thus
So that the primary windings connected in series of the armature winding of transformer TC1 and transformer TC3, the third pin of transformer TC1 passes through short circuit
Point J25 is connected with the 5th pin of transformer TC3, so that the secondary of the secondary windings of transformer TC1 and transformer TC3
Windings in series.
Preferably, the input terminal of the A phase sample circuit 1 is connected with load, the armature winding of the transformer TC1 with
The output end of A phase sample circuit 1 is connected and the primary windings connected in series with transformer TC3, the secondary windings of transformer TC1 with it is whole
The input terminal of the rectifier bridge Z1 of current circuit 4 is connected, the electric energy measurement of the output end and electronic electric energy meter of the rectifier bridge Z1
Chip is connected, and the input terminal of B phase sample circuit 2 and the input terminal of C phase sample circuit 3 are connected with load respectively, and B phase samples
The output end of circuit 2 and the output end of C phase sample circuit 3 are connected with the both ends of the armature winding of transformer TC3 respectively, described
The secondary windings of transformer TC3 is connected with the input terminal of the rectifier bridge Z3 of rectification circuit 4, the output end of the rectifier bridge Z3 with
The electric energy measure chip of electronic electric energy meter is connected.
Preferably, the C phase sample circuit 3 includes C phase voltage input terminal, varistor RV3 and voltage transformer
The first pin of RTV3, the voltage transformer RTV3 are connected with C phase voltage input terminal, and the second of voltage transformer RTV3
The third pin of pin and voltage transformer the RTV3 second pin with the first pin of transformer TC3 and transformer TC3 respectively
It is connected, and the third pin ground connection of voltage transformer RTV3, one end of the varistor RV3 and C phase voltage input terminal
Son is connected and the other end is connected and is grounded with the B phase voltage input terminal of B phase sample circuit 2.
Preferably, the input terminal of the A phase sample circuit 1 is connected with load, the armature winding of the transformer TC1 with
The output end of A phase sample circuit 1 is connected and the primary windings connected in series with transformer TC3, the secondary windings of transformer TC1 with it is whole
The input terminal of the rectifier bridge Z1 of current circuit 4 is connected, the electric energy measurement of the output end and electronic electric energy meter of the rectifier bridge Z1
Chip is connected, and the input terminal of B phase sample circuit 2 is connected with load, and armature winding and the B phase of the transformer TC2 samples
The output end of circuit 2 is connected, and the input terminal of the rectifier bridge Z2 of the secondary windings and rectification circuit 4 of transformer TC2 is connected, institute
The output end for stating rectifier bridge Z2 is connected with the electric energy measure chip of electronic electric energy meter, the input terminal of C phase sample circuit 3 and negative
Load is connected, and the output end and zero line side of C phase sample circuit 3 are connected with the both ends of the armature winding of transformer TC3 respectively, institute
The input terminal for stating the secondary windings of transformer TC3 and the rectifier bridge Z3 of rectification circuit 4 is connected, the output end of the rectifier bridge Z3
It is connected with the electric energy measure chip of electronic electric energy meter.
Preferably, the C phase sample circuit 3 includes C phase voltage input terminal, varistor RV3 and voltage transformer
The first pin of RTV3, the voltage transformer RTV3 are connected with C phase voltage input terminal, and the second of voltage transformer RTV3
The third pin of pin and voltage transformer the RTV3 second pin with the first pin of transformer TC3 and transformer TC3 respectively
It is connected, and the third pin ground connection of voltage transformer RTV3, one end of the varistor RV3 and C phase voltage input terminal
Son is connected and the other end is connected and is grounded with the neutral voltage input terminal of zero line side.
Preferably, the B phase sample circuit 2 includes B phase voltage input terminal, varistor RV2 and voltage transformer
The first pin of RTV2, the voltage transformer RTV2 are connected with B phase voltage input terminal, and the second of voltage transformer RTV2
The third pin of pin and voltage transformer the RTV2 second pin with the first pin of transformer TC2 and transformer TC2 respectively
It is connected, and the third pin ground connection of voltage transformer RTV2, one end of the varistor RV2 and B phase voltage input terminal
Son is connected and the other end is grounded, and the rectifier bridge Z2 includes diode D6, diode D7, diode D8 and diode D9,
The anode of the diode D6 is connected with the cathode of the 5th pin of transformer TC2 and diode D7 respectively, the diode
The anode of D8 is connected with the cathode of the third pin of depressor TC2 and diode D9 respectively, the cathode and diode of diode D6
The cathode of D8 is connected and passes through terminal VA and is connected with electric energy measure chip, and the anode of the diode D7 is with diode D9's
Anode is connected and is grounded.
Preferably, the A phase sample circuit 1 includes A phase voltage input terminal, varistor RV1 and voltage transformer
The first pin of RTV1, the voltage transformer RTV1 are connected with A phase voltage input terminal, and the second of voltage transformer RTV1
The third pin of pin and voltage transformer the RTV1 second pin with the first pin of transformer TC1 and transformer TC1 respectively
It is connected, and the third pin ground connection of voltage transformer RTV1, one end of the varistor RV1 and A phase voltage input terminal
Son is connected and the other end is grounded.
Preferably, the rectifier bridge Z1 includes diode D2, diode D3, diode D4 and diode D5, and described two
The anode of pole pipe D2 is connected with the cathode of the 5th pin of transformer TC1 and diode D3 respectively, and the diode D4 is just
Pole is connected with the cathode of the third pin of depressor TC1 and diode D5 respectively, the cathode of diode D2 and bearing for diode D4
Pole is connected and passes through terminal VA and is connected with electric energy measure chip, the positive phase of the anode and diode D5 of the diode D3
Connect and ground.
Preferably, the rectifier bridge Z3 includes diode D10, diode D11, diode D12 and diode D13, institute
The anode for stating diode D10 is connected with the cathode of the 5th pin of transformer TC3 and diode D11 respectively, the diode
The anode of D12 is connected with the cathode of the third pin of depressor TC3 and diode D13 respectively, the cathode of diode D10 and two poles
The cathode of pipe D12 is connected and passes through terminal VA and is connected with electric energy measure chip, the anode and diode of the diode D11
13 anode is connected and is grounded, and one end of the capacitor C43 is connected by terminal VA with electric energy measure chip and the other end
Ground connection, one end of the capacitor C26 is connected by terminal VA with electric energy measure chip and the other end is grounded.
The electronic electric energy meter of the utility model by by the armature winding of transformer TC3 and transformer TC1 it is primary around
Group series connection, and the secondary windings of transformer TC1 is connected with the secondary windings of transformer TC3 by being shorted point J25, so that in A
Electric energy meter can also work normally when phase sample circuit and C phase sample circuit power on, and not increase transformer belt to realize
On the basis of loading capability, any two-phase of three phases electronic energy meter is made to power on the normal work that can guarantee electric energy meter, it is convenient
The use of user.In addition, the electronic electric energy meter of the utility model makes the secondary windings of transformer TC1 by being shorted point J25
It also connects with the secondary windings of transformer TC3, so that the turn ratio after transformer TC1 and transformer TC3 series connection remains unchanged, from
And any two-phase for realizing three-phase three-wire electric energy meter under conditions of two transformers are used only is powered on and can be worked normally
It is required that reducing energy consumption compared to original three transformer electric energy meter of phase three-wire three.
Detailed description of the invention
Fig. 1 is the principle of work and power block diagram of the utility model；
Fig. 2 is the circuit diagram of the three-phase three-wire electric energy meter of the utility model；
Fig. 3 is the circuit diagram of the three-phase and four-line electric energy meter of the utility model.
Specific embodiment
The embodiments of the present invention are provided below in conjunction with attached drawing 1 to 3, further illustrate the electronic type electricity of the utility model
The specific embodiment of energy table.The electronic electric energy meter of the utility model is not limited to the following description.
As shown in Figure 1, the electronic electric energy meter of the utility model includes the power circuit for carrying out electricity consumption sampling, institute
The power circuit stated includes A phase sample circuit 1, B phase sample circuit 2, C phase sample circuit 3 and rectification circuit 4, and the A phase is adopted
Sample circuit 1 is connected with the armature winding of the transformer TC1 of electric energy meter, the secondary windings and rectification circuit 4 of the transformer TC1
It is connected, the C phase sample circuit 3 is connected with the armature winding of the transformer TC3 of electric energy meter, the transformer TC3's
Secondary windings is connected with rectification circuit 4, and the primary windings connected in series of the armature winding of transformer TC3 and transformer TC1, becomes
The secondary windings of depressor TC3 is connected with the secondary windings of transformer TC1 by being shorted point J25, the B phase sample circuit 2 and C
Phase sample circuit 3 is connected with the both ends of the armature winding of transformer TC3 respectively, alternatively, B phase sample circuit 2 and electric energy meter
The armature winding of transformer TC2 is connected and the zero line side of electric energy meter and C phase sample circuit 3 primary with transformer TC3 respectively
The both ends of winding are connected, and the secondary windings of transformer TC2 is connected with rectification circuit 4, so as to form phase three-wire three electric energy
Table or three-phase and four-line electric energy meter.Preferably, the short circuit point J25 is reserved on printed wiring board, time of transformer TC3
Grade winding is connected and thereby has at low cost by way of being shorted point J25 using welding with the secondary windings of transformer TC1
And the not no advantage of power limit, simultaneously, it is noted that if using welding directly at the position for being shorted point J25
The mode of 0 Ω resistance of patch, then can have the risk of overload burning resistance.
The electronic electric energy meter of the utility model is by the way that transformer TC3 to be connected and transformer TC2 phase with transformer TC1
Only be connected with B phase sample circuit 2 to being independently arranged so that when A phase sample circuit 1 and B phase sample circuit 2 power on and
When B phase sample circuit 2 and C phase sample circuit 3 power on, electric energy meter can be worked normally, by by the primary of transformer TC3
The primary windings connected in series of winding and transformer TC1, and by being shorted point J25 for the secondary windings of transformer TC1 and transformer TC3
Secondary windings series connection so that electric energy meter can also work normally when A phase sample circuit 1 and C phase sample circuit 3 power on, from
And realize on the basis of not increasing transformer belt loading capability, any two-phase of three phases electronic energy meter, which powers on, can guarantee
The normal work of electric energy meter, it is convenient for users to use.
As shown in Fig. 2, one embodiment of the utility model is, the A phase sample circuit 1 is connected with transformer TC1
It connects, the B phase sample circuit 2 and C phase sample circuit 3 are connected so as to form two transformation of phase three-wire three with transformer TC3
The electronic electric energy meter of device, the i.e. input terminal of A phase sample circuit 1 are connected for sampling and obtaining adopting for A phase load with load
The armature winding of sample signal, the transformer TC1 is connected with the output end of A phase sample circuit 1 and the primary with transformer TC3
The input terminal of windings in series, the rectifier bridge Z1 of the secondary windings and rectification circuit 4 of transformer TC1 is connected, the rectifier bridge Z1
Output end be connected with the electric energy measure chip of electronic electric energy meter for by sampled signal be transmitted to electric energy measure chip from
And the calculating of electricity consumption is carried out, the input terminal of B phase sample circuit 2 and the input terminal of C phase sample circuit 3 are connected with load respectively
For sampling and obtaining the sampled signal of B phase load and the sampled signal of C phase load, the output end and C phase of B phase sample circuit 2
The output end of sample circuit 3 is connected with the both ends of the armature winding of transformer TC3 respectively, the transformer TC3 it is secondary around
Group is connected with the input terminal of the rectifier bridge Z3 of rectification circuit 4, the output end of the rectifier bridge Z3 and the electricity of electronic electric energy meter
Chip is capable of measuring to be connected for sampled signal to be transmitted to electric energy measure chip to carry out the calculating of electricity consumption.
Specifically, the A phase sample circuit 1 includes A phase voltage input terminal, varistor RV1 and voltage transformer
The first pin of RTV1, the voltage transformer RTV1 are connected with A phase voltage input terminal, and the second of voltage transformer RTV1
The third pin of pin and voltage transformer the RTV1 second pin with the first pin of transformer TC1 and transformer TC1 respectively
It is connected, and the third pin ground connection of voltage transformer RTV1, one end of the varistor RV1 and A phase voltage input terminal
Son is connected and the other end is grounded, and the C phase sample circuit 3 includes C phase voltage input terminal, varistor RV3 and voltage
The first pin of mutual inductor RTV3, the voltage transformer RTV3 are connected with C phase voltage input terminal, voltage transformer RTV3
Second pin and voltage transformer RTV3 third pin respectively with the first pin of transformer TC3 and transformer TC3
Two pins are connected, and the third pin ground connection of voltage transformer RTV3, one end of the varistor RV3 and C phase voltage
Input terminal is connected and the other end is connected and is grounded with the B phase voltage input terminal of B phase sample circuit 2.
The rectification circuit 4 includes rectifier bridge Z1, rectifier bridge Z3, capacitor C43 and capacitor C26, the rectifier bridge Z1
Anode including diode D2, diode D3, diode D4 and diode D5, the diode D2 is respectively with transformer TC1's
5th pin is connected with the cathode of diode D3, the diode D4 anode respectively with the third pin of depressor TC1 and two
The cathode of pole pipe D5 is connected, and the cathode of diode D2 is connected with the cathode of diode D4 and passes through terminal VA and electric energy measurement
Chip is connected, and the anode of the diode D3 is connected and is grounded with the anode of diode D5, and the rectifier bridge Z3 includes
Diode D10, diode D11, diode D12 and diode D13, the diode D10 anode respectively with transformer TC3's
5th pin is connected with the cathode of diode D11, the diode D12 anode respectively with the third pin of depressor TC3 and
The cathode of diode D13 is connected, and the cathode of diode D10 is connected with the cathode of diode D12 and passes through terminal VA and electricity
It is capable of measuring chip to be connected, the anode of the diode D11 is connected and is grounded with the anode of diode 13, the capacitor C43
One end be connected by terminal VA with electric energy measure chip and the other end is grounded, one end of the capacitor C26 passes through terminal VA
Be connected with electric energy measure chip and the other end be grounded, and the second pin of transformer TC1 by welding with transformation
The second pin of device TC3 is connected and is grounded, so that the armature winding of the armature winding of transformer TC1 and transformer TC3
Series connection, meanwhile, the third pin of transformer TC1 is connected by being shorted point J25 with the 5th pin of transformer TC3, to make
The secondary windings for obtaining transformer TC1 is connected with the secondary windings of transformer TC3.
The two transformer electric energy meter of phase three-wire three of the utility model when in use, only connects transformer TC1 and transformer
TC3, transformer TC2 be it is unconnected, by analysis, A phase sample circuit 1 and B phase sample circuit 2 powered on, B phase sample circuit 2
Electric energy meter can work normally when powering on C phase sample circuit 3, when A phase sample circuit 1 and C phase sample circuit 3 power on, by
In the armature winding of transformer TC1 and the primary windings connected in series of transformer TC3, then transformer TC1 and transformer TC3 it is common just
The grade number of windings is original two times, thus by be shorted point J25 make the secondary of the secondary windings of transformer TC1 and transformer TC3 around
Group is also connected, so that transformer TC1 and transformer TC3 common secondary windings number is also original two times, and due to
The diode of rectifier bridge Z1 and rectifier bridge Z3 compete power supply the principle, so that the turn ratio after transformer TC1 and transformer TC3 series connection
It remains unchanged, so that any two-phase for realizing three-phase three-wire electric energy meter under conditions of two transformers are used only powers on equal energy
The requirement of normal work reduces energy consumption compared to original three transformer electric energy meter of phase three-wire three.
As shown in figure 3, another embodiment of the utility model is, the A phase sample circuit 1 and transformer TC1 phase
Connection, the B phase sample circuit 2 is connected with transformer TC2, the zero line side of the C phase sample circuit 3 and electric energy meter and
Transformer TC3 is connected so as to form the electronic electric energy meter of three transformer of three-phase and four-line, the i.e. input of A phase sample circuit 1
The sampled signal being connected with load for sampling and obtaining A phase load is held, armature winding and the A phase of the transformer TC1 is adopted
The output end of sample circuit 1 is connected and the primary windings connected in series with transformer TC3, the secondary windings and rectified current of transformer TC1
The input terminal of the rectifier bridge Z1 on road 4 is connected, the output end of the rectifier bridge Z1 and the electric energy measure chip of electronic electric energy meter
It is connected for sampled signal to be transmitted to electric energy measure chip to carry out the calculating of electricity consumption, the input of B phase sample circuit 2
The sampled signal being connected with load for sampling and obtaining B phase load is held, armature winding and the B phase of the transformer TC2 is adopted
The output end of sample circuit 2 is connected, and the input terminal of the rectifier bridge Z2 of the secondary windings and rectification circuit 4 of transformer TC2 is connected,
The output end of the rectifier bridge Z2 is connected with the electric energy measure chip of electronic electric energy meter for sampled signal to be transmitted to electricity
Chip is capable of measuring to carry out the calculating of electricity consumption, the input terminal of C phase sample circuit 3 is connected for sampling and obtaining with load
The sampled signal of C phase load, the output end and zero line side of C phase sample circuit 3 both ends with the armature winding of transformer TC3 respectively
It is connected, the input terminal of the rectifier bridge Z3 of the secondary windings and rectification circuit 4 of the transformer TC3 is connected, the rectifier bridge
The output end of Z3 is connected with the electric energy measure chip of electronic electric energy meter for sampled signal to be transmitted to electric energy measure chip
To carry out the calculating of electricity consumption.
Specifically, the A phase sample circuit 1 includes A phase voltage input terminal, varistor RV1 and voltage transformer
The first pin of RTV1, the voltage transformer RTV1 are connected with A phase voltage input terminal, and the second of voltage transformer RTV1
The third pin of pin and voltage transformer the RTV1 second pin with the first pin of transformer TC1 and transformer TC1 respectively
It is connected, and the third pin ground connection of voltage transformer RTV1, one end of the varistor RV1 and A phase voltage input terminal
Son is connected and the other end is grounded；
The B phase sample circuit 2 includes B phase voltage input terminal, varistor RV2 and voltage transformer RTV2, institute
The first pin for stating voltage transformer RTV2 is connected with B phase voltage input terminal, the second pin of voltage transformer RTV2 and
The third pin of voltage transformer RTV2 is connected with the second pin of the first pin of transformer TC2 and transformer TC2 respectively,
And the third pin of voltage transformer RTV2 is grounded, and one end of the varistor RV2 is connected with B phase voltage input terminal
And the other end is grounded；
The C phase sample circuit 3 includes C phase voltage input terminal, varistor RV3 and voltage transformer RTV3, institute
The first pin for stating voltage transformer RTV3 is connected with C phase voltage input terminal, the second pin of voltage transformer RTV3 and
The third pin of voltage transformer RTV3 is connected with the second pin of the first pin of transformer TC3 and transformer TC3 respectively,
And the third pin of voltage transformer RTV3 is grounded, and one end of the varistor RV3 is connected with C phase voltage input terminal
And the other end is connected and is grounded with the neutral voltage input terminal of zero line side.
The rectification circuit 4 includes rectifier bridge Z1, rectifier bridge Z2, rectifier bridge Z3, capacitor C43 and capacitor C26, described
Rectifier bridge Z1 include diode D2, diode D3, diode D4 and diode D5, the diode D2 anode respectively with transformation
The 5th pin of device TC1 is connected with the cathode of diode D3, and third of the anode of the diode D4 respectively with depressor TC1 is drawn
Foot is connected with the cathode of diode D5, and the cathode of diode D2 is connected with the cathode of diode D4 and passes through terminal VA and electricity
It is capable of measuring chip to be connected, the anode of the diode D3 is connected and is grounded with the anode of diode D5；
The rectifier bridge Z2 includes diode D6, diode D7, diode D8 and diode D9, the diode D6's
Anode be connected respectively with the cathode of the 5th pin of transformer TC2 and diode D7, the diode D8 anode respectively with
The third pin of depressor TC2 is connected with the cathode of diode D9, and the cathode of diode D6 is connected with the cathode of diode D8
And be connected by terminal VA with electric energy measure chip, the anode of the diode D7 is connected and connects with the anode of diode D9
Ground；
The rectifier bridge Z3 includes diode D10, diode D11, diode D12 and diode D13, the diode
The anode of D10 is connected with the cathode of the 5th pin of transformer TC3 and diode D11 respectively, the anode of the diode D12
It is connected respectively with the cathode of the third pin of depressor TC3 and diode D13, the cathode of diode D10 and bearing for diode D12
Pole is connected and passes through terminal VA and is connected with electric energy measure chip, the anode of the anode and diode 13 of the diode D11
It is connected and is grounded, one end of the capacitor C43 is connected by terminal VA with electric energy measure chip and the other end is grounded, described
One end of capacitor C26 is connected by terminal VA with electric energy measure chip and the other end is grounded, and the second of transformer TC1 is drawn
Foot is connected and is grounded with the second pin of transformer TC3 by welding, so that the armature winding of transformer TC1
With the primary windings connected in series of transformer TC3, meanwhile, the third pin of transformer TC1 is by being shorted point J25's and transformer TC3
5th pin is connected, so that the secondary windings of transformer TC1 is connected with the secondary windings of transformer TC3.When short circuit point
When J25 is disconnected, this electric energy meter is three-phase and four-line electric energy meter；When being shorted point J25 short circuit, this electric energy meter is phase three-wire three electric energy
Table.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard
To belong to the protection scope of the utility model.
Claims (10)
1. a kind of electronic electric energy meter, including power circuit, it is characterised in that: the power circuit includes A phase sample circuit
(1), B phase sample circuit (2), C phase sample circuit (3) and rectification circuit (4), the A phase sample circuit (1) and electric energy meter
The armature winding of transformer TC1 is connected, and the secondary windings of the transformer TCl is connected with rectification circuit (4), the C
Phase sample circuit (3) is connected with the armature winding of the transformer TC3 of electric energy meter, the secondary windings of the transformer TC3 with it is whole
Current circuit (4) is connected, and the primary windings connected in series of the armature winding of transformer TC3 and transformer TC1, transformer TC3's
Secondary windings is connected with the secondary windings of transformer TC1 by being shorted point J25；
The B phase sample circuit (2) and C phase sample circuit (3) is connected with the both ends of the armature winding of transformer TC3 respectively
It connects, alternatively, B phase sample circuit (2) is connected with the armature winding of the transformer TC2 of electric energy meter and the zero line side and C of electric energy meter
Phase sample circuit (3) is connected with the both ends of the armature winding of transformer TC3 respectively, the secondary windings of transformer TC2 and rectification
Circuit (4) is connected.
2. electronic electric energy meter according to claim 1, it is characterised in that: the second pin and change of the transformer TC1
The second pin of depressor TC3 is connected and is grounded so that the armature winding of transformer TC1 and transformer TC3 it is primary around
The third pin of group series connection, transformer TC1 is connected by being shorted point J25 with the 5th pin of transformer TC3, so that becoming
The secondary windings of depressor TCl is connected with the secondary windings of transformer TC3.
3. electronic electric energy meter according to claim 2, it is characterised in that: the armature winding of the transformer TC1 and A phase
The output end of sample circuit (1) is connected and the primary windings connected in series with transformer TC3, the secondary windings of transformer TC1 with it is whole
The input terminal of the rectifier bridge Z1 of current circuit (4) is connected, and the output end of the rectifier bridge Z1 and the electric energy of electronic electric energy meter are surveyed
Amount chip is connected, and the output end of B phase sample circuit (2) and the output end of C phase sample circuit (3) are respectively with transformer TC3's
The both ends of armature winding are connected, the input terminal phase of the secondary windings and the rectifier bridge Z3 of rectification circuit (4) of the transformer TC3
Connection, the output end of the rectifier bridge Z3 are connected with the electric energy measure chip of electronic electric energy meter.
4. electronic electric energy meter according to claim 3, it is characterised in that: the C phase sample circuit (3) includes C phase
First pin of voltage input-terminal, varistor RV3 and voltage transformer RTV3, the voltage transformer RTV3 and C phase electricity
Pressure input terminal is connected, the third pin of the second pin of voltage transformer RTV3 and voltage transformer RTV3 respectively with transformation
The first pin of device TC3 is connected with the second pin of transformer TC3, and the third pin ground connection of voltage transformer RTV3,
One end of the varistor RV3 is connected with C phase voltage input terminal and the B phase voltage of the other end and B phase sample circuit (2)
Input terminal is connected and is grounded.
5. electronic electric energy meter according to claim 2, it is characterised in that: the armature winding of the transformer TCl and A phase
The output end of sample circuit (1) is connected and the primary windings connected in series with transformer TC3, the secondary windings of transformer TC1 with it is whole
The input terminal of the rectifier bridge Z1 of current circuit (4) is connected, and the output end of the rectifier bridge Z1 and the electric energy of electronic electric energy meter are surveyed
Amount chip is connected, and the armature winding of the transformer TC2 is connected with the output end of B phase sample circuit (2), transformer TC2
Secondary windings be connected with the input terminal of the rectifier bridge Z2 of rectification circuit (4), the output end and electronic type of the rectifier bridge Z2
The electric energy measure chip of electric energy meter is connected, and the output end and zero line side of C phase sample circuit (3) are first with transformer TC3 respectively
The both ends of grade winding are connected, and the secondary windings of the transformer TC3 is connected with the input terminal of the rectifier bridge Z3 of rectification circuit (4)
It connects, the output end of the rectifier bridge Z3 is connected with the electric energy measure chip of electronic electric energy meter.
6. electronic electric energy meter according to claim 5, it is characterised in that: the C phase sample circuit (3) includes C phase
First pin of voltage input-terminal, varistor RV3 and voltage transformer RTV3, the voltage transformer RTV3 and C phase electricity
Pressure input terminal is connected, the third pin of the second pin of voltage transformer RTV3 and voltage transformer RTV3 respectively with transformation
The first pin of device TC3 is connected with the second pin of transformer TC3, and the third pin ground connection of voltage transformer RTV3,
One end of the varistor RV3 is connected with C phase voltage input terminal and the neutral voltage input terminal of the other end and zero line side
Son is connected and is grounded.
7. electronic electric energy meter according to claim 5, it is characterised in that: the B phase sample circuit (2) includes B phase
First pin of voltage input-terminal, varistor RV2 and voltage transformer RTV2, the voltage transformer RTV2 and B phase electricity
Pressure input terminal is connected, the third pin of the second pin of voltage transformer RTV2 and voltage transformer RTV2 respectively with transformation
The first pin of device TC2 is connected with the second pin of transformer TC2, and the third pin ground connection of voltage transformer RTV2,
One end of the varistor RV2 is connected with B phase voltage input terminal and the other end is grounded；
The rectifier bridge Z2 includes diode D6, diode D7, diode D8 and diode D9, the anode of the diode D6
Be connected respectively with the cathode of the 5th pin of transformer TC2 and diode D7, the diode D8 anode respectively with depressor
The third pin of TC2 is connected with the cathode of diode D9, and the cathode of diode D6 is connected and leads to the cathode of diode D8
It crosses terminal VA to be connected with electric energy measure chip, the anode of the diode D7 is connected and is grounded with the anode of diode D9.
8. the electronic electric energy meter according to claim 3 or 5, it is characterised in that: the A phase sample circuit (1) includes A
The first pin and the A phase of phase voltage input terminal, varistor RV1 and voltage transformer RTV1, the voltage transformer RTV1
Voltage input-terminal is connected, the third pin of the second pin of voltage transformer RTV1 and voltage transformer RTV1 respectively with change
The first pin of depressor TC1 is connected with the second pin of transformer TC1, and the third pin of voltage transformer RTV1 connects
The one end on ground, the varistor RV1 is connected with A phase voltage input terminal and the other end is grounded.
9. the electronic electric energy meter according to claim 3 or 5, it is characterised in that: the rectifier bridge Z1 includes diode
D2, diode D3, diode D4 and diode D5, the diode D2 anode respectively with the 5th pin of transformer TC1 and
The cathode of diode D3 is connected, and the anode of the diode D4 is negative with the third pin of depressor TC1 and diode D5 respectively
Pole is connected, and the cathode of diode D2 is connected with the cathode of diode D4 and passes through terminal VA and is connected with electric energy measure chip
It connects, the anode of the diode D3 is connected and is grounded with the anode of diode D5.
10. the electronic electric energy meter according to claim 3 or 5, it is characterised in that: the rectifier bridge Z3 includes diode
D10, diode D11, diode D12 and the positive of diode D13, the diode D10 are drawn with the 5th of transformer TC3 the respectively
Foot is connected with the cathode of diode D11, the diode D12 anode respectively with the third pin and diode of depressor TC3
The cathode of D13 is connected, and the cathode of diode D10 is connected with the cathode of diode D12 and passes through terminal VA and electric energy measurement
Chip is connected, and the anode of the diode D11 is connected and is grounded with the anode of diode 13, and one end of capacitor C43 passes through
Terminal VA is connected with electric energy measure chip and the other end is grounded, and one end of capacitor C26 passes through terminal VA and electric energy measure chip
It is connected and the other end is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820681208.8U CN208672693U (en) | 2018-05-08 | 2018-05-08 | Electronic electric energy meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820681208.8U CN208672693U (en) | 2018-05-08 | 2018-05-08 | Electronic electric energy meter |
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| Publication Number | Publication Date |
|---|---|
| CN208672693U true CN208672693U (en) | 2019-03-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117192189A (en) * | 2023-11-03 | 2023-12-08 | 浙江正泰物联技术有限公司 | Three-phase voltage measurement circuit, method and three-phase ammeter |
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2018
- 2018-05-08 CN CN201820681208.8U patent/CN208672693U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117192189A (en) * | 2023-11-03 | 2023-12-08 | 浙江正泰物联技术有限公司 | Three-phase voltage measurement circuit, method and three-phase ammeter |
| CN117192189B (en) * | 2023-11-03 | 2024-03-12 | 浙江正泰物联技术有限公司 | Three-phase voltage measurement circuit, method and three-phase ammeter |
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Address after: Zhengtai Instrument Measurement Industrial Park, No.1 Liangce Road, Beibaixiang Town, Leqing City, Wenzhou City, Zhejiang Province, 325603 Patentee after: ZHEJIANG CHINT INSTRUMENT & METER Co.,Ltd. Address before: 325603 Wenzhou Bridge Industrial Zone, Zhejiang, Yueqing Patentee before: ZHEJIANG CHINT INSTRUMENT & METER Co.,Ltd. |