A miswiring device for electrical energy metering

Abstract

The application discloses a wrong wiring device for electric energy metering, comprising: a voltage adjustment module and a current adjustment module; the input end of the voltage adjustment module is used for inputting phase voltage, the output end is used for connecting the electric energy metering device, and the voltage adjustment module is used for adjusting the phase voltage to a voltage preset value; the input end of the current adjustment module is used for inputting phase voltage, the output end is used for connecting the input end of the electric energy metering device, and the current adjustment module is used for adjusting the current value corresponding to the phase voltage to a current preset value; the voltage amplitude of the phase voltage is within a voltage safety range; the voltage preset value ranges from 1 V to 10 V; and the current preset value ranges from 5 mA to 10 mA. The technical problem that the safety hidden danger exists in the process that the metering personnel practices the checking of the metering device and inputs high phase voltage is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric energy metering, and in particular to an error wiring device for electric energy metering. BACKGROUND

[0002] With the development of social economy, the annual electricity consumption in China is as high as hundreds of millions of kilowatts. In the power grid, the electric energy metering device is used to measure the electricity consumption. Therefore, it is particularly important to ensure the accurate metering of the electric energy metering device.

[0003] In order to ensure the accuracy of the electric energy metering device, the electric energy metering device is usually checked before use. The checking refers to that the measurement personnel connects the error electric signal to the electric energy metering device in the error wiring state to check the parameters such as voltage, current, power factor and frequency.

[0004] In the prior art, there are many error wiring modes. For three-phase three-wire voltage, there are 6 error modes of phase voltage and 8 error modes of current phase sequence, and there are 6*8 error modes in total. Since there are many error wiring modes, in order to ensure accurate checking work, the measurement personnel needs to constantly practice wiring to ensure that the error mode of the connected line is consistent with the preset error wiring mode. However, the three-phase voltage connected is high, and the measurement personnel has safety hazards in the process of practicing wiring. SUMMARY

[0005] Therefore, the present application provides an error wiring device for electric energy metering, which solves the technical problem of safety hazards in the process of connecting high voltage during the training of electric energy metering students.

[0006] The present application provides an error wiring device for electric energy metering, comprising: a voltage adjustment module and a current adjustment module.

[0007] The input end of the voltage adjustment module is used to input phase voltage, and the output end is used to connect the electric energy metering device, and the voltage adjustment module is used to adjust the phase voltage to a voltage preset value.

[0008] The input end of the current adjustment module is used to input phase voltage, and the output end is used to connect the input end of the electric energy metering device, and the current adjustment module is used to adjust the current value corresponding to the phase voltage to a current preset value.

[0009] The voltage amplitude of the phase voltage is within a voltage safety range.

[0010] The voltage preset value ranges from 1V to 10V.

[0011] The current preset value ranges from 5mA to 10mA.

[0012] Optionally,

[0013] The voltage adjustment module comprises two voltage circuits;

[0014] The voltage circuit comprises a first integrated operational amplifier module, a variable resistor RF1;

[0015] The inverting input end of the first integrated operational amplifier module is connected with the first end of the variable resistor RF1, and the output end is connected with the second end of the variable resistor RF1.

[0016] Optionally,

[0017] The voltage circuit further comprises a resistor R1, a resistor R2, a variable resistor R3, and a resistor R4;

[0018] The first end of the resistor R1 is connected with the first input end of the voltage circuit, and the second end is connected with the inverting input end of the first integrated operational amplifier module;

[0019] The first end of the resistor R2 is connected with the second input end of the voltage circuit, and the second end is connected with the non-inverting input end of the first integrated operational amplifier module;

[0020] The first end of the variable resistor R3 is connected with the second end of the resistor R2, and the second end is grounded;

[0021] The first end of the resistor R4 is connected with the output end of the first integrated operational amplifier module, and the second end is connected with the output end of the voltage circuit.

[0022] Optionally,

[0023] The error wiring device for electric energy metering further comprises a voltage phase sequence module;

[0024] The voltage phase sequence module comprises a plurality of first switches, which are composed of three parallel mechanical switches;

[0025] The input end of the first switch is used for inputting a voltage phase sequence type signal;

[0026] The two input ends of the voltage phase sequence module are connected with the output ends of two voltage circuits one by one, for receiving the output signals of the voltage adjustment module;

[0027] The voltage phase sequence module is used for transforming and outputting the output signals of the voltage adjustment module according to the voltage phase sequence type signal.

[0028] Optionally,

[0029] The voltage phase sequence module comprises a plurality of second switches, which are linkage switches;

[0030] The plurality of second switches and the plurality of first switches are connected one by one.

[0031] Optionally,

[0032] The voltage phase sequence module further comprises a plurality of first indicator lights;

[0033] The plurality of first indicator lights are connected to the plurality of second switches one by one, and the first indicator light is used to indicate the switching state of the corresponding second switch.

[0034] Optionally,

[0035] The current adjustment module comprises two current circuits;

[0036] The current circuit comprises a second integrated operational amplifier module, a variable resistor RF2, an inductive load, a capacitive load, and a variable resistor R8.

[0037] The inverting input terminal of the second integrated operational amplifier module is connected to the first terminal of the variable resistor RF2, and the output terminal is connected to the second terminal of the variable resistor RF2.

[0038] The first terminal of the variable resistor R8 is connected to the output terminal of the second integrated operational amplifier module, and the second terminal is connected to the first terminal of the parallel inductive load and capacitive load.

[0039] The second terminal of the parallel inductive load and capacitive load is connected to the output terminal of the current circuit.

[0040] Optionally,

[0041] The error wiring device for electric energy metering further comprises a current phase sequence module.

[0042] The current phase sequence module comprises a plurality of third switches, which are composed of three parallel mechanical switches.

[0043] The input terminal of the third switch is used to input a current phase sequence type signal.

[0044] The two input terminals of the current phase sequence module are connected to the output terminals of the two current circuits one by one, and are used to receive the output signals of the current adjustment module.

[0045] The current phase sequence module is used to transform and output the output signals of the current adjustment module according to the current phase sequence type signal.

[0046] Optionally,

[0047] The current phase sequence module comprises a plurality of fourth switches, which are linkage switches.

[0048] The plurality of fourth switches are connected to the plurality of third switches one by one.

[0049] Optionally,

[0050] The current phase sequence module further comprises a plurality of second indicator lights;

[0051] The plurality of second indicator lights are connected to the plurality of fourth switches one by one, and the second indicator light is used to indicate the switching state of the corresponding connected fourth switch.

[0052] From the above technical solutions, the present application has the following advantages:

[0053] In the practice of checking the electric energy metering device, the metering personnel needs to practice a plurality of incorrect connection modes, but the input voltage is usually high, which poses a safety hazard to the metering personnel. Therefore, the phase voltage input in the safety voltage range in the incorrect connection device for electric energy metering in the present application, the output voltage value of the phase voltage after input is adjusted to the voltage preset value by the voltage adjustment module and output, the voltage preset value ranges from 1 to 10V, the output current value of the current adjustment module is adjusted to the current preset value and output, the current preset value ranges from 5 to 10mA, and the adjusted output voltage and current are connected to the electric energy metering device.

[0054] The phase voltage input in the safety range in the electric energy metering device, and the voltage and current output in the safety range, the phase voltage is in the safety range in the process of practicing the incorrect connection mode, which solves the technical problem that the phase voltage input by the metering personnel in the process of practicing the metering device checking is high and poses a safety hazard. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 It is a schematic diagram of two voltage circuits of an incorrect connection device for electric energy metering in an embodiment of the present application;

[0056] Figure 2 It is a circuit diagram of a voltage phase sequence module of an incorrect connection device for electric energy metering in an embodiment of the present application;

[0057] Figure 3 It is a schematic diagram of a current circuit of an incorrect connection device for electric energy metering in an embodiment of the present application;

[0058] Figure 4 It is a circuit diagram of a current phase sequence module of an incorrect connection device for electric energy metering in an embodiment of the present application. DETAILED DESCRIPTION

[0059] The incorrect connection device for electric energy metering in the embodiment of the present application solves the technical problem that the phase voltage input by the electric energy metering personnel in the process of practicing the metering device checking is high and poses a safety hazard.

[0060] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and not intended to be limiting on the application or its applications or uses. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of the present application.

[0061] Unless specifically stated, the relative arrangements of the components and steps, numerical expressions, and numerical values set forth in the examples herein are not meant to limit the scope of the present application.

[0062] It should be understood, of course, that the dimensions of the various parts illustrated in the various drawings are shown for simplicity and the actual dimensions can depend on the specific application.

[0063] The techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as if the discussion were incorporated herein by reference.

[0064] In all the examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation. Other examples of the exemplary embodiments can therefore have different values.

[0065] It should be noted that like reference numerals and letters refer to like items in the following drawings and that, as such, a discussion of the same will not be repeated in connection with the following drawings.

[0066] An error wiring device for electric energy metering, the following is an embodiment in the present application, in order to understand, please refer to Figures 1 to 4 , specifically includes: voltage adjustment module, current adjustment module, the input end of the voltage adjustment module is used for inputting phase voltage, the output end is used for connecting the electric energy metering device, the voltage adjustment module adjusts the input phase voltage and outputs a voltage preset value, the voltage preset value is input to the input end of the electric energy metering device, the range of the voltage preset value is 1-10V;The input end of the current adjustment module is used for inputting phase voltage, and the output end is used for connecting the electric energy metering device, the current adjustment module is used for adjusting the current value corresponding to the phase voltage to a current preset value, and the current preset value ranges from 5mA to 10mA.

[0067] In the embodiment, the output voltage preset value can be 3V, 5V, 7V, 8V, and those skilled in the art can select as required; the current preset value output by the current adjustment module can be 5mA, 6mA, 7mA, 8mA. Those skilled in the art can set as required.

[0068] In the embodiment, the metering personnel need to practice multiple incorrect connection methods in the practice of checking the electric energy metering device, but the input voltage is usually high, which poses a safety hazard to the metering personnel. Therefore, the incorrect connection device for electric energy metering in the application inputs phase voltage in a safe voltage range, the input phase voltage is adjusted by a voltage adjustment module to a preset voltage value and output, and a current adjustment module adjusts its output current value to a preset current value and outputs, and the adjusted output voltage and current are input into the electric energy metering device.

[0069] The voltage preset value ranges from 1 to 10 V, and the current preset value ranges from 5 to 10 mA, both of which are within the safe range of voltage and current.

[0070] The phase voltage input into the electric energy metering device is within a safe range, and the phase voltage is within a safe range during the practice of connecting incorrect connection methods, which solves the technical problem of high phase voltage input by the metering personnel during the practice of checking the metering device, and poses a safety hazard.

[0071] The following is embodiment two of the application, which further describes the incorrect connection device for electric energy metering based on embodiment one, please refer to Figures 1 to 4 , which specifically includes:

[0072] The incorrect connection box for metering further includes two voltage circuits.

[0073] The voltage circuit includes a first integrated operational amplifier module, a variable resistor RF1, a resistor R1, a resistor R2, a variable resistor R3, and a resistor R4. The inverting input end of the first integrated operational amplifier module is connected with the first end of the variable resistor RF1, and the output end is connected with the second end of the variable resistor RF1. The first end of the resistor R1 is connected with the first input end of the voltage circuit, and the second end is connected with the inverting input end of the first integrated operational amplifier module. The first end of the resistor R2 is connected with the second input end of the voltage circuit, and the second end is connected with the non-inverting input end of the first integrated operational amplifier module. The first end of the variable resistor R3 is connected with the second end of the resistor R2, and the second end is grounded. The first end of the resistor R4 is connected with the output end of the first integrated operational amplifier module, and the second end is connected with the output end of the voltage circuit.

[0074] It should be noted that the input ends of the two voltage circuits correspond to input phase voltage respectively, for example, the input end of one of the voltage circuits inputs the adjusted and stepped-down A-phase and B-phase voltage, and the input end of the other voltage circuit inputs the adjusted and stepped-down B-phase and C-phase voltage, and the person skilled in the art can select the input phase voltage as needed. The adjustment and step-down of the phase voltage are prior art in the art, which will not be described here.

[0075] Specifically, the error wiring device for electric energy metering further comprises a voltage phase sequence module;

[0076] The voltage phase sequence module comprises a plurality of first switches, a plurality of second switches and a plurality of first indicator lights; the first switches are composed of three mechanical switches in parallel; the input end of the first switch is used for inputting a voltage phase sequence type signal; two input ends of the voltage phase sequence module are connected with the output ends of two voltage circuits one by one, and are used for receiving the output signal of the voltage adjustment module.

[0077] The voltage phase sequence module is used for transforming and outputting the output signal of the voltage adjustment module according to the voltage phase sequence type signal.

[0078] It should be noted that the second switch is a linkage switch, the plurality of first indicator lights are connected with the plurality of second switches one by one, and the first indicator light is used for indicating the switch state of the corresponding second switch.

[0079] It can be understood that the first switch, the second switch and the first indicator light can all be six; one first switch corresponds to one kind of voltage phase sequence type signal, and the six first switches correspond to six kinds of voltage phase sequence signals one by one, for example, as shown in Figure 2 The phase sequence of the voltage signal output from the top down of the output end of the voltage phase sequence module can be ABC, ACB, BAC, BCA, CAB and CBA, which can be selected by a person skilled in the art as needed.

[0080] In the embodiment, the second switch corresponds to one kind of voltage phase sequence type signal, and when the error wiring operation is needed during the verification of the electric energy metering device, manual setting of the wiring is not needed, and only the second switch needs to be controlled to select the corresponding output voltage phase sequence type, so that the voltage phase sequence module can output the preset voltage phase sequence signal, thereby avoiding the inconsistency between the actual wiring and the preset wiring to affect the verification, and meanwhile, the operation steps of the wiring are reduced, and the efficiency is improved.

[0081] The following is embodiment three of the present application, which will be described in detail on the basis of embodiment one. Figure 3 , Figure 4 Specifically, the error wiring device for electric energy metering further comprises:

[0082] The error wiring device for electric energy metering further comprises:

[0083] The current adjustment module comprises two current circuits;

[0084] The current circuit comprises a second integrated operational amplifier module, a variable resistor RF2, an inductive load, a capacitive load, a variable resistor R8, a resistor R5, a resistor R6, a resistor R7 and an inductor L1.

[0085] Further, the inverting input terminal of the second integrated operational amplifier module is connected with the first terminal of the variable resistor RF2, and the output terminal is connected with the second terminal of the variable resistor RF2; the first terminal of the variable resistor R8 is connected with the output terminal of the second integrated operational amplifier module, and the second terminal is connected with the first terminal of the inductive load and the capacitive load in parallel; the second terminal of the inductive load and the capacitive load in parallel is connected with the output terminal of the current circuit; the first terminal of the resistor R5 is grounded, and the second terminal is connected with the inverting input terminal of the second integrated operational amplifier module; the first terminal of the resistor R6 is connected with the input terminal of the current circuit, and the second terminal is connected with the non-inverting input terminal of the second integrated operational amplifier; the first terminal of the resistor R7 is connected with the second terminal of the resistor R6, and the second terminal is grounded; the first terminal of the inductor L1 is connected with the output terminal of the current circuit, and the second terminal is grounded.

[0086] Specifically, the error wiring device of the electric energy metering further comprises: a current phase sequence module;

[0087] The current phase sequence module comprises: a plurality of third switches, a plurality of fourth switches, and a plurality of second indicator lamps; the input terminals of the third switches are used for inputting current phase sequence type signals; the two input terminals of the current phase sequence module are connected with the output terminals of the two current circuits one by one, for receiving the output signals of the current adjustment module; the current phase sequence module is used for performing current phase sequence transformation on the output signals of the current adjustment module and outputting according to the current phase sequence type signals.

[0088] It should be noted that the fourth switches are linkage switches, the second indicator lamps are connected with the fourth switches one by one, and the second indicator lamps are used for indicating the switch states of the corresponding fourth switches.

[0089] It can be understood that the third switches, the fourth switches, and the second indicator lamps can all be eight; one third switch corresponds to one kind of current phase sequence type signal, and the eight third switches correspond to eight kinds of current phase sequence signals one by one, for example, as shown in Figure 4 The phase sequences of the current signals output from the top down of the output terminal of the voltage phase sequence module can be IAIC, -IAIC, IA-IC, -IA-IC, ICIA, -ICIA, IC-IA, and -IC-IA.

[0090] In the embodiment, the current phase sequence module is used to input the phase sequence of the current signals output by the current circuit into the electric energy metering device, the on-off of the second linkage switch on the current phase sequence module can output the phase sequence of the current signals input into the current phase sequence module according to the selection of the second linkage switch, and in the step of checking and correcting the error wiring in the electric energy metering device, the error wiring and the preset wiring are prevented.

[0091] The above-described embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A miswiring device for electrical energy metering, characterized by, The utility model relates to an error wiring device for electric energy metering, including: a voltage adjustment module and a current adjustment module; an input end of the voltage adjustment module is used for inputting a phase voltage, an output end is used for connecting an electric energy metering device, and the voltage adjustment module is used for adjusting the phase voltage to a voltage preset value; an input end of the current adjustment module is used for inputting a phase voltage, an output end is used for connecting an input end of an electric energy metering device, and the current adjustment module is used for adjusting a current value corresponding to the phase voltage to a current preset value; a voltage amplitude of the phase voltage is within a voltage safety range; a range of the voltage preset value is 1-10V; a range of the current preset value is 5-10mA; the voltage adjustment module includes two voltage circuits; the voltage circuit includes a first integrated operational amplifier module and a variable resistor RF1; an inverting input end of the first integrated operational amplifier module is connected with a first end of the variable resistor RF1, and an output end is connected with a second end of the variable resistor RF1; the voltage circuit further includes a resistor R1, a resistor R2, a variable resistor R3 and a resistor R4; a first end of the resistor R1 is connected with a first input end of the voltage circuit, and a second end is connected with an inverting input end of the first integrated operational amplifier module; a first end of the resistor R2 is connected with a second input end of the voltage circuit, and a second end is connected with a noninverting input end of the first integrated operational amplifier module; a first end of the variable resistor R3 is connected with a second end of the resistor R2, and a second end is grounded; a first end of the resistor R4 is connected with an output end of the first integrated operational amplifier module, and a second end is connected with an output end of the voltage circuit; the error wiring device for electric energy metering further includes a voltage phase sequence module; the voltage phase sequence module includes a plurality of first switches, and the first switches are composed of three parallel mechanical switches; an input end of the first switch is used for inputting a voltage phase sequence type signal; two input ends of the voltage phase sequence module are connected with output ends of two voltage circuits one by one, and are used for receiving output signals of the voltage adjustment module; the voltage phase sequence module is used for transforming and outputting the output signals of the voltage adjustment module according to the voltage phase sequence type signal; the voltage phase sequence module includes a plurality of second switches, and the second switches are linkage switches; a plurality of second switches and a plurality of first switches are connected one by one; the voltage phase sequence module further includes a plurality of first indicator lamps; a plurality of first indicator lamps are connected with a plurality of second switches one by one, and the first indicator lamps are used for indicating switch states of the corresponding second switches.

2. A mis wiring device for electrical energy metering according to claim 1, characterized in that, the current adjustment module includes two current circuits; the current circuit includes a second integrated operational amplifier module, a variable resistor RF2, an inductive load, a capacitive load and a variable resistor R8; an inverting input end of the second integrated operational amplifier module is connected with a first end of the variable resistor RF2, and an output end is connected with a second end of the variable resistor RF2; a first end of the variable resistor R8 is connected with an output end of the second integrated operational amplifier module, and a second end is connected with a first end of the inductive load and the capacitive load in parallel; The second end of the inductive load, the capacitive load and the current circuit are connected with the output end.

3. A mis wiring device for electrical energy metering according to claim 2, characterised in that, The error wiring device for electric energy metering further comprises a current phase sequence module. The current phase sequence module comprises a plurality of third switches, which are composed of three mechanical switches in parallel. The input end of the third switch is used for inputting a current phase sequence type signal. Two input ends of the current phase sequence module are connected with the output ends of the two current circuits one by one, and are used for receiving the output signal of the current adjusting module. The current phase sequence module is used for transforming the output signal of the current adjusting module in current phase sequence and outputting according to the current phase sequence type signal.

4. A mis wiring device for electrical energy metering according to claim 3, characterised in that, The current phase sequence module comprises a plurality of fourth switches, which are linkage switches. The plurality of fourth switches and the plurality of third switches are connected one by one.

5. A mis wiring device for electrical energy metering according to claim 4, characterised in that, The current phase sequence module further comprises a plurality of second indicator lamps. The plurality of second indicator lamps are connected with the plurality of fourth switches one by one, and the second indicator lamp is used for indicating the switch state of the corresponding fourth switch.

Images