CN201489655U - Power meter equipment - Google Patents

Abstract

An electrical quantity meter device comprises an electrical quantity meter that is equipped with a device for sending data between the electrical quantity meter and a communication module. The communication module is equipped with a device for sending data to a remote unit. The device for sending the data between the electrical quantity meter and the communication module comprises an appliance (6) for sending wireless signals between the electrical quantity meter and the communication module .

Description

Power meter equipment

technical field

The utility model relates to a power meter device, which includes a power meter, and the meter is equipped with a device for transmitting data between the power meter and a communication module, and the communication module is equipped with a device for transmitting the data to a remote unit. Such meters are designed and arranged for the purpose of measuring the amount of electricity consumed at a given location or by a particular machine or the like.

Background technique

Electricity meters are used for the purpose of measuring the amount of electricity consumed at a specific location, such as in an apartment or house or in an industrial complex where the consumption of electricity should be measured. Data on consumption may be sent to the electricity provider via a nearby communication module, which may use any suitable communication technology for this purpose. Thereby, there are provided means for sending measurement data from the electricity meter to the communication module, and means for sending said data from the communication module to any other unit, such as the data set by the electricity provider memory etc. Until now, the means for sending said data from the electricity meter to the communication module have been formed by physical cables or conductors between the electricity meter and the communication module. The communication module is an integral part physically connected to the electricity meter.

Utility model content

The purpose of the present utility model is to provide a power meter device which can physically separate the communication module from the power meter itself, thereby enabling simplified installation or removal of the communication module associated with the power meter.

The object of the present invention is achieved by an initially defined electric quantity meter device, characterized in that said means for transmitting data between said electric quantity meter and said communication module comprises a wireless transmission of signals between said electric quantity meter and said module installation.

Preferably, said means for transmitting data between the electricity meter and the communication module comprises an IR port provided on the electricity meter. By using infrared light as a means of sending data, an increased ability to send different kinds of data is achieved and a greater flexibility in sending data from the electricity meter to the module is achieved than if only light emitting diodes were used for this purpose sex and greater capacity.

Preferably, the communication module includes a corresponding IR port through which a signal sent by the power meter through the IR port of the power meter can be received. It is a further feature and advantage of the present invention that the IR port of the communication module can even be used not only to receive data from the electricity meter, but also to send data to the electricity meter.

Preferably, through its hardware (electronic assembly board, mechanism, etc.), software (residing in a small computer inside the electricity meter), and meter type specific programming (saved in non-volatile EEPROM memory) carried out at the time of its manufacture. Control the function of the electricity meter. Features (hardware and software) that are not standard (included in all meters) will be pointed out in the following description.

Other features and advantages of the present invention will be disclosed in the following detailed description of the present invention.

Description of drawings

A detailed description of the electricity meter device according to the present invention will be explained with reference to the accompanying drawings, wherein:

Fig. 1 is a perspective view and a front view of an instrument according to the present invention,

Fig. 2 is the equivalent schematic diagram of the pulse output according to the instrument of the present invention, and

Fig. 3 is a block diagram of the electronic components of the meter according to the present invention.

Detailed ways

The basic functions and actual processing of the electricity meter according to the present invention will be described initially. Functionality regarding communication will be described later.

The meter according to the utility model is an electronic electricity meter for single-phase metering. As an option, the meter has a pulse output and reset possibility for one of two energy registers. Settings are made via buttons or via communication. The meter according to the invention is ready to be mounted on a DIN rail and is designed according to the ABB ProM standard. The meter according to the invention is an active energy, single phase meter for direct metering up to 65A. The meter according to the invention has an LCD display with 6 digits, 6mm height to ensure easy reading.

The instrument according to the utility model is made compactly and has only 2 modules, so as to save the installation space.

A red LED on the front flashes in proportion to the energy consumed. The meter according to the invention has a temperature range from -25 to +55°C (memory +70°C).

The instrument according to the utility model has 3 kinds of communication methods according to the type.

- Display on the front

- Pulse output (optional)

- IR interface for serial communication (together with serial communication adapter). The latter features are considered new and original.

The meter according to the invention is equipped with a reset function (optional) and has a user button which is sealed by installing the meter according to the invention in a modular package. This button can be used to reset the measured energy consumption and to view the total energy consumption.

The type of meter to which the meter according to the invention belongs can be tested and approved according to IEC62052-11 and 62053-21. Measuring Equipment Directive (MID), Category B, Electrical Environment Category E2 and Electrical Environment Category M1 EN 50470-1, EN 50470-3 Category B. These standards cover all technical aspects of the meter such as climatic conditions, electromagnetic compatibility (EMC), electrical specifications, mechanical specifications and accuracy.

The meter of the invention forms the basis of a product family divided into two types:

Direct Connect Meters up to 65A

Up to 65A direct connect meter with reset and pulse outputs.

The different parts of the meter are described below, along with a short description of each part. Use a seal to seal the meter (covers all meter connections and set buttons).

In Fig. 1, the following reference numerals indicate the following parts of the meter:

1- LED

2- Product information

3+5 LED and LED frequency

4- Button (optional). This button can be used to reset the energy and change the display

model.

6- Optical port

7- Sealing tape

8- neutral terminal

9- Voltage and current terminals

10- Label with wiring diagram of terminals and arrangements for approval marking

11- Number of terminals

12- DIN rail lock

13- Pulse output (optional)

14- phase terminal

15- Phase terminals made for bundled and flexible cables

16- Phase terminals made for the busbar system

In meters with a reset function and a push button, the energy can be reset via push button 4. The energy is reset by pressing the button 4 during a predetermined period of time, preferably more than 4 seconds. When a reset is in progress, it is indicated on the LCD by "moving 0" from left to right. After reset, the meter will always go to an alternate mode showing resettable energy (which will be all 0).

As an option, the meter according to the invention can be equipped with a pulse output for active energy. This pulse output sends out a certain number of pulses per kilowatt-hour. This pulse output is electrically isolated from the rest of the electronics in the meter. This meets the IEC standard 62053-31 and the DIN 43864 standard (commonly referred to as S0). The output has a specified maximum voltage of 40 volts DC and a maximum current of 100 mA. Use transistors and transistor type optocouplers to build it, and it's polarity dependent. The equivalent circuit of the output is shown in Figure 2.

The energy measurement is carried out electronically. In FIG. 3 the electronics of the meter used for this purpose are shown in block diagram.

As shown in Figure 3, the instrumentation hardware can be divided into the following parts:

• A microcontroller for performing energy calculations. Voltage and current signals are sampled by an A/D converter incorporated into the microcontroller and digitally multiplied together to obtain the energy. The meter is calibrated via the register to meet the accuracy class requirements specified in the standard. The microcontroller also handles the LCD, EEPROM, red LED, programmable amplifier, infrared (IR) communication interface and selectable button and pulse output.

· LCD (Liquid Crystal Display) for displaying accumulated energy, status information, etc.

• The current is measured with a current transformer (CT) through which the current to be measured flows. The output current from the converter flows through a load resistor, which generates the voltage that is fed to the microcontroller. At low currents, the signal is amplified with a programmable amplifier.

• The supply voltage is divided by a resistor divider and fed to the microcontroller.

· Buttons (optional) for controlling the reset function and changing the display mode on the LCD.

• A power supply that generates the voltage fed to the electronic components (microcontroller, EEPROM, etc.).

• A red LED (Light Emitting Diode) that flashes with a certain frequency of energy pulses (pulses/kWh).

- Optically isolated pulse output (optional) which gives a certain number of pulses per kWh.

EEPROM for saving energy (1 total for active energy and 1 optional resettable register), for microcontroller and for calibration of meter specific values used by firmware in microcontroller and initial value.

• Infrared communication interface including phototransistor and LED for connection to external communication unit.

Reading meters through a communication interface offers several advantages over manual reading:

· The time taken to read multiple meters is very short. It is also possible to perform sequential reads.

• The risk of getting wrong values due to errors during manual reading is minimized.

· The value is stored electronically, which makes it easier to process it further.

The meter according to the invention has an optical interface provided on the left side of the meter in FIG. 1 . For communication via the optical interface, the M-Bus protocol is used. The electricity meter device according to the invention comprises a separate communication module which forms said communication interface and which is provided as a supplement to the meter according to the invention. In an operative position, the communication module is arranged adjacent to the electricity meter and is equipped with or connected to means for further transmitting data received from the meter to any remote unit.

Claims (3)

1. power instrument equipment, comprise: power instrument, it is equipped with the device that is used for sending data between this power instrument and communication module, this communication module is equipped with the device that is used to send data to remote unit, it is characterized in that the described device that is used for sending data between this power instrument and this communication module comprises the device (6) that is used for wireless transmission signal between described power instrument and described module.

2. according to the power instrument equipment of claim 1, it is characterized in that the IR port that provides on this power instrument is provided the described device (6) that is used for transmission data between described power instrument and described communication module.

3. according to the power instrument equipment of claim 2, it is characterized in that it comprises described communication module, and described communication module comprises corresponding to the IR port (6) of this power instrument and can receive the IR port of the data that send from the IR port (6) of this power instrument.

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