CN206523625U - Multi-epitope electric energy meter on-site calibrator calibrating installation - Google Patents

Abstract

The utility model discloses a verification device for a field calibrator of a multi-meter electric energy meter. ;The main control computer is connected to the power source, the power source is connected to the instrument, the standard meter and the verification meter box, each verification meter box is equipped with an error calculator, the standard meter is connected to the error calculator, and the error calculator communicates with the main control computer ; The power source includes a controller, the controller is connected to the signal generator, one output of the signal generator is connected to the first signal amplifier and the first signal converter, one output terminal of the first signal converter directly outputs a voltage signal, and one is connected to The first relay is then connected to the signal generator; the other output of the signal generator is connected to the second signal amplifier, the second signal converter and the signal processor. After the relay is connected to the signal generator.

Description

Verification device for multi-surface electric energy meter field calibrator

technical field

The utility model relates to the technical field of electric energy meter field calibrator, in particular to a verification device for multi-table electric energy meter field calibrator.

Background technique

The electric energy meter belongs to the measuring instrument, which is an important measuring instrument among the power generation system, the power supply system (including power transmission, power transformation, electricity sales, etc.), and the power consumption system (including enterprises, residents, etc.), and its accuracy is very high. The electric energy meter on-site calibrator (hereinafter referred to as: on-site calibrator) and its verification device are important parts to ensure the accuracy of the electric energy meter. In order to ensure the accurate and effective implementation of the on-site testing of electric energy meters, the verification of the on-site calibrator is particularly important.

At present, both foreign and domestic field calibrator verifications are carried out on the standard electric energy meter verification device. ), with a high degree of uncertainty. As power generation, power supply, and electricity systems pay more attention to on-site verification of electric energy meters, the number of on-site calibrators is also increasing significantly, and the manufacturers, specifications, and standards are constantly changing, so the verification efficiency of on-site calibrators is getting higher and higher. more important. At the same time, with the development and innovation of electronic technology, the output capacity, accuracy and stability of the power source have been greatly developed, which provides a guarantee for more epitope detection systems.

Utility model content

The purpose of this utility model is to solve the above-mentioned problems by providing a verification device for a field calibrator of a multi-meter electric energy meter, which can realize accurate and stable verification of the straight-through type and the current clamp type of the field calibrator on the same set of verification device , there is no need to replace the wiring during the verification process, and the consistency of the current clamp verification can be guaranteed.

In order to achieve the above object, the utility model adopts the following technical solutions:

The verification device of the multi-meter electric energy meter field calibrator includes a console and a meter connection platform. There are multiple verification meter boxes on the stage; the main control computer is connected to the power source, and the power source is connected to the instrument, the standard meter and the verification meter box. Each verification meter box is equipped with an error calculator, and the standard meter and the verification meter box are connected. The error calculator is connected, and the error calculator communicates with the main control computer;

The power source includes a controller, the controller is connected to the signal generator, one output of the signal generator is connected to the first signal amplifier and the first signal converter, and one output terminal of the first signal converter directly outputs Voltage signal, one way is connected to the first relay and then connected to the signal generator;

The other output of the signal generator is connected with the second signal amplifier, the second signal converter and the signal processor. One output terminal of the signal processor directly outputs a current signal, and one output terminal is connected to the second relay and then connected to the signal generator.

A standard meter connection terminal is reserved on the console, and the standard meter connection terminal is connected to the connection terminal of the standard meter.

A power socket, a current terminal, a voltage terminal, a detected pulse receiving terminal and a current clamp wiring copper column are externally arranged on the verification meter box.

The front side of the surface of the meter-connecting table is a platform for placing the tested equipment, and the rear side is a plurality of protruding verification meter box outer boxes, and the interior of each verification meter box outer box is provided with the verification meter box. A shielding plate that can be pulled up and down is provided on the front side of the box outer box, and a gap is provided on the surface of the connecting table corresponding to the shielding plate for the shielding plate to pass through.

A box body is arranged under the console, and the power source is arranged in the box body.

The instrument is provided on the rear side of the surface of the console.

The console is also provided with a working status indicator connected to the power source to indicate whether the power source is working or not.

Inside the verification meter box, all current terminals are connected in series, and all voltage terminals are connected in parallel.

The standard meter uses a three-phase 0.01-level standard electric energy meter K2006.

The beneficial effects of the utility model are:

1. Realize the verification of a set of devices for standard electric energy meters and on-site calibrators (straight-through and clamp meters).

2. To ensure the accuracy and stability of clamp meter verification.

3. Simultaneous verification of multiple meters with different specifications and different constants (including standard electric energy meters and on-site calibrators) has been realized.

4. This device has greatly improved the verification efficiency of the on-site calibrator, especially the clamp meter, and has a good prospect of application and promotion.

Description of drawings

Figure 1 is a structural diagram of the console;

Figure 2 is a structural diagram of the connecting table;

Fig. 3 is a structural diagram of the verification meter box;

Figure 4 is a specific current and voltage terminal connection diagram;

Fig. 5 is the circuit diagram of power source;

Among them, 1. Console, 2. Power source, 3. Standard meter terminal, 4. Tested meter terminal, 5. Instrument, 6. Connecting table, 7. Shielding plate, 8. Calibration meter box, 8.1 Current Clamp wiring copper column, 8.2. Error calculator, 8.3. The receiving end of the detected pulse, 8.4 Power socket, 8.5 Current terminal, 8.6 Voltage terminal; 9. Working indicator light;

10.1: Controller; 10.2: Display; 10.3: Signal Generator; 10.41: First Signal Amplifier; 10.42: Second Signal Amplifier; 10.51: First Signal Converter; 10.52: Second Signal Converter; 10.61: First Relay ; 10.62: second relay; 10.7: signal processor.

detailed description:

Below in conjunction with accompanying drawing and embodiment the utility model is described further:

As shown in Figure 1-3, the multi-meter electric energy meter field calibrator verification device includes a console 1 and a meter connection platform 6, and the console 1 is provided with a power source 2, an instrument 5, a working indicator light 9, Standard meter terminal 3, tested meter terminal 4 and main control computer (not shown in the figure), said table connecting table 6 is provided with a plurality of verification meter boxes 8;

The main control computer is connected with the power source 2, and the power source 2 is connected with the instrument 5, the standard meter and the verification meter box 8, and each verification meter box 8 is provided with an error calculator 8.2, a standard meter and an error calculator 8.2 connected, the error calculator 8.2 communicates with the main control computer.

As shown in Figure 5, the power source is a three-phase power source, including a controller (CPU) 10.1, the controller is connected to a signal generator 10.3, and one output of the signal generator 10.3 is connected to the first signal amplifier 10.41 and the first signal amplifier 10.41. A signal converter 10.51 is connected, the output terminal of the first signal converter 10.51 directly outputs a voltage signal one way, and one way is connected to the first relay 10.61 (gear selection) and then connected to the signal generator;

The other output of the signal generator is connected to the second signal amplifier 10.42, the second signal converter 10.52 and the signal processor 10.7, and the output terminal of the signal processor (filtering, etc.) directly outputs the current signal one way, and one way is connected to the second relay Connect to the signal generator after 10.62.

Each phase is connected with the above-mentioned first signal amplifier 10.41, first signal converter 10.51, first relay 10.61, second signal amplifier 10.42, second signal converter 10.52, signal processor 10.7, and second relay 10.62. Three phases share one controller. The controller is also connected to the display 10.2.

The power source communicates with the external control computer through the internal controller to receive and send power source work instructions. After the output instructions are issued, the controller first decomposes the output instructions and transmits them to phases A, B, and C of the power source in turn. After receiving, decompose the instruction again, and pass it to the signal generator of voltage and current in turn. After the signal is generated, it passes through the signal amplifier, passes it to the signal converter, and converts it into the required output signal. If the signal does not meet the output requirements, the signal will be transmitted. To the relay, select the appropriate signal output gear and process the signal, and then send the processed signal to the signal amplifier, and transmit the signal in turn, until the signal that meets the output requirements is obtained. In order to ensure an accurate and stable output signal, a signal processor is added between the current signal converter and the relay to process the current signal, including removing stray signals.

The instrument 5 includes a three-phase voltmeter and a three-phase ammeter.

A standard meter terminal 3 is reserved on the console 1, and the standard meter terminal 3 is connected to the terminal of the standard meter.

The verification meter box 8 is externally provided with a power socket 8.4, a current terminal 8.5, a voltage terminal 8.6, a pulse receiving terminal 8.3 and a current clamp connection copper column 8.1.

The front side of the surface of the meter-connecting table 6 is a platform for placing the tested equipment, and the rear side is a plurality of protruding verification meter box outer boxes, and the inside of each verification meter box outer box is provided with the verification meter box 8, The front side of the test watch case outer box is provided with a shielding plate 7 that can be pulled up and down, and a gap is provided on the surface of the connecting table corresponding to the shielding plate for the shielding plate 7 to pass through.

A box body is arranged under the console, and the power source 2 is arranged in the box body.

The instrument 5 is arranged on the rear side of the surface of the console 1 .

The console 1 is also provided with a working status indicator connected to the power source 2 for indicating whether the power source is working or not.

As shown in FIG. 4 , hollow circles represent current output terminals, solid circles represent current input terminals, and concentric circles represent voltage terminals. Inside the verification meter box 8, all current terminals are connected in series, and all voltage terminals are connected in parallel. The voltage terminals of the power source and the standard meter and console are connected in parallel, and the current terminals are also connected in series. Among them, the current terminal of the console in Figure 4 is the terminal reserved for the standard meter, so the current output terminal of the standard meter and the current output terminal of the console are connected together, and the current input terminal of the standard meter and the current input of the console ends are connected together.

The purpose of the utility model is to improve the efficiency of the on-site calibrator verification work, ensure the accuracy and stability of the current through-type verification and the current clamp-type verification, especially the consistency of the current clamp-type verification, and provide a current through-through The equipment for the verification of the straight-through type and the current clamp type of the on-site calibrator can be accurately and stably verified on the same set of verification device. There is no need to replace the wiring during the verification process, and the current clamp type can be guaranteed. Test consistency.

The utility model is used in conjunction with a standard meter, a power source, etc. to form a verification device for an on-site calibrator.

After fully considering the requirements of the test quantity and test efficiency, a set of 10-site test device is formed together with the standard meter, power source and other equipment, and 10 field calibrators (including straight-through type) of different manufacturers and different constants are tested at the same time. and current clamp), the accuracy reaches 0.01%, and the stability reaches 0.005%. The appearance design is simple and intuitive, the operation is convenient and the verification efficiency is high.

1) Console: a set, placed equipment includes: power source, standard meter, instrument 5, main control computer, etc.

The power source and the console are designed in one piece, placed on the lower right side of the operating table, providing load output for the entire verification device, which is an important guarantee for the load capacity and stability of the verification device;

The standard meter is located on the right side of the operating table and above the power source, which is an important guarantee for the accuracy of the verification device;

Meter 5 is in the center of the operating table, using 6 internationally advanced pointer meters, which can accurately and intuitively display the three-phase voltage and three-phase current output values of the device. The device is equipped with a working indicator light to display the working status of the device.

The control computer is placed on the left side of the console operation table.

2) Meter connection table: two sets (only one set is shown in the figure), including: the table for placing the tested field calibrator and the independent verification table box.

After considering factors such as floor space and convenience, a back-to-back design is selected, and each table includes 5 verification table boxes.

3) Verification meter boxes: ten sets, the verification meter boxes are independent of each other, and every 5 verification meter boxes are connected side by side with a set of meter tables (integrated design), a total of 2 sets of meter tables, 10 sets of verification meter boxes. Each verification form box includes:

The external power socket (220V) of the field calibrator under inspection;

Voltage terminals (A-B-C-N terminals);

ground terminal

Current terminals (two sets of terminals with different ranges, one set up to 12A(max.), one set up to 120A(max.));

Current clamp wiring copper post (current clamp type verification, using copper terminal with a diameter of Φ8 or Φ10, which can be interchanged according to the diameter of the jaw);

Error calculator (displays the error value of the field calibrator under inspection, the number of pulses remaining in the verification, the remaining time in the verification, etc.);

Receiver of detected pulse (high and low frequency pulse, max.200kHz, 5-12(24)V pulse amplitude);

Shielding plate (when the test table box is not in use, cover the test table box to prevent moisture and dust).

Use the on-site calibrator verification device designed by the utility model:

The three-phase 0.01-level standard electric energy meter K2006 is used as the working standard of the device. The standard output pulse of the standard meter is connected to each verification meter box, and the pulse from the tested field calibrator is received through the tested pulse receiving end on the verification meter box. , the error value is calculated by the error calculator on the test table box.

There is a selection button for straight-through verification or current clamp verification on the console, which can be operated according to the verification needs:

When the straight-through type verification is selected, external wiring is required. After the power source outputs current, it first enters the current input terminal of the standard meter, flows out from the output terminal, enters the current input terminal of the console, and then flows out from the current terminal of the console, and enters the second terminal. The current input end of a verification meter box flows out from the current output end, enters the input end of the second verification meter box, and then flows out from the output end to the input end of the third verification meter box, and so on, until from The output end of the last verification meter flows out and enters the current input end of the power source. At this time, each verification meter box, power source, and standard meter, the current is connected in series, and the voltage is connected in parallel.

When the current clamp type verification is selected, external wiring is also required. After the current flows out of the power source, it first passes through the standard meter, then passes through the current clamp terminal of the verification meter box in turn, and finally returns to the current input terminal of the power source. At this time, the entire current loop Only go through standard tables.

The current clamp wiring copper column of each verification meter box is made of copper material, with a diameter of Φ8 or Φ10, which can be replaced according to the diameter of the tested current clamp jaw. The copper terminal is in the shape of a "door", and the exposed visible part is insulated to ensure operation. Safety, the upper horizontal column is the clamp of the current clamp, so that the current clamp can pass through the center vertically during the test, ensuring the accuracy, stability and consistency of the test. Self-tightening connection is adopted between the uprights on both sides of the terminal and the copper pole of the current clamp. The copper pole of the current clamp clamps the copper pole through its own tension, and the conductivity at the connection end must be ensured. This design ensures that the wiring for verification According to the size of the verified current clamp and the diameter of the jaw, the terminal can be replaced with a suitable diameter terminal and the height of the terminal can be adjusted.

The pulse of the tested field calibrator is received by the pulse receiving end of each calibration meter box, and compared with the standard pulse of the standard meter in the error calculator to calculate the accurate error value.

Although the specific implementation of the utility model has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the utility model. Those skilled in the art should understand that on the basis of the technical solution of the utility model, those skilled in the art do not need to Various modifications or deformations that can be made with creative efforts are still within the protection scope of the present utility model.

Claims (10)

1. The verification device of the multi-meter electric energy meter field calibrator is characterized in that it includes a console and a meter connection platform, and the console is provided with a power source, an instrument, a working indicator light, a terminal of the meter under test and a main control computer, the table connecting table is provided with a plurality of verification meter boxes; the main control computer is connected with a power source, and the power source is connected with an instrument, a standard meter and a verification meter box, and each verification meter box is provided with an error A calculator, the standard meter is connected to the error calculator, and the error calculator communicates with the main control computer; The power source includes a controller, the controller is connected to the signal generator, one output of the signal generator is connected to the first signal amplifier and the first signal converter, and one output terminal of the first signal converter directly outputs Voltage signal, one way is connected to the first relay and then connected to the signal generator; The other output of the signal generator is connected with the second signal amplifier, the second signal converter and the signal processor. One output terminal of the signal processor directly outputs a current signal, and one output terminal is connected to the second relay and then connected to the signal generator. 2. The verification device of a multi-meter electric energy meter field calibrator as claimed in claim 1, wherein the meter comprises a three-phase voltmeter and a three-phase ammeter. 3. The multi-meter electric energy meter field calibrator verification device as claimed in claim 1, is characterized in that, a standard meter terminal is reserved on the console, and the standard meter terminal and the terminal of the standard meter connect. 4. The verification device of a multi-meter electric energy meter field calibrator as claimed in claim 1, wherein a power socket, a current connection terminal, a voltage connection terminal, and a detected pulse receiving terminal are externally provided on the said verification meter box And current clamp wiring copper column. 5. The verification device of the multi-meter electric energy meter field calibrator as claimed in any one of claims 1-4, wherein the front side of the surface of the meter-connecting table is a platform for placing the tested equipment, and the rear side is A plurality of protruding test case outer boxes, the inside of each test case outer box is provided with said test case, the front side of the test case outer box is provided with a shielding plate that can be pulled up and down, connected to the table surface There is a gap on the top corresponding to the shielding plate for the shielding plate to pass through. 6. The verification device of multi-meter electric energy meter field calibrator as claimed in claim 1, characterized in that, a box body is arranged under the console, and the power source is arranged in the box body. 7. The verification device for a multi-meter electric energy meter field calibrator as claimed in claim 1, wherein the meter is arranged on the rear side of the surface of the console. 8. The verification device of multi-table electric energy meter field calibrator as claimed in claim 1, characterized in that, the console is also provided with a work indicator connected to the power source for indicating whether the power source is working or not. Status Indicator. 9. The verification device of a multi-meter electric energy meter field calibrator as claimed in claim 4, wherein, inside the verification meter box, all current terminals are connected in series, and all voltage terminals are connected in parallel. 10. The verification device of a multi-meter electric energy meter field calibrator according to claim 1, wherein the standard meter is a three-phase 0.01 class standard electric energy meter K2006.