JP4895659B2 - Electronic energy meter - Google Patents

Description

  The present invention relates to an electronic watt-hour meter, and more particularly to an electronic watt-hour meter configured to measure the amount of power for each time zone and switch and display the amount of power for each time zone.

  In a conventional electronic watt-hour meter, when measuring the amount of electric power by time zone and displaying the measured value, the meter reading screen on which the electric power metered value by time zone is displayed automatically at predetermined time intervals The meter was switched in sequence, and the meter reader read and recorded the measured value of the electric energy during that time period. (For example, refer to Patent Document 1).

JP 2001-183400 A

  A conventional electronic watt-hour meter is configured as described above, and a plurality of measured values for each time zone are automatically switched and displayed at predetermined time intervals on an arbitrary display unit. Since the changed screen is continuously switched, there is a problem that it is difficult to notice that the screen has been switched.

  In addition, if the screen of a predetermined time zone is missed, it is necessary to wait until the screen display is completed and the screen of the predetermined time zone is redisplayed.

  The present invention has been made to solve the above-mentioned problems. It reduces the oversight of the screen of the meter reader who reads the metered value for each time zone, shortens the time required for meter reading, and efficiently reads the meter. It is an object of the present invention to provide an electronic watt-hour meter.

An electronic watt-hour meter according to the present invention includes a voltage / current measuring unit that measures a voltage value and a current value, a calculation unit that calculates a power amount for each time zone based on the voltage value and the current value, and the calculation Display the electric energy calculated by the means on the display screen for each time zone, display means for sequentially switching the display screen for each time zone, illumination means for illuminating the display screen, after displaying a predetermined time amount of power the display screen of the time zones, and control means Ru switched to the power capability of the display screen of another time zone, the illumination after switching to the display screen of the electric energy of the other time periods The lighting control means for making the means blink for another predetermined time, and the blink setting means for setting the time and number of times of the blinking are provided.

  The electronic watt-hour meter according to the present invention is configured as described above, and visually notifies the timing of screen switching when the display screen for each time zone is automatically and sequentially switched at a predetermined time interval. Therefore, it is possible to reduce the oversight of the screen after switching.

Embodiment 1
Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing an external configuration of an electronic watt hour meter according to the first embodiment, FIG. 2 is a block diagram showing a configuration of the electronic watt hour meter according to the first embodiment, and FIG. FIG. 4 is an explanatory diagram for explaining the switching state of the display screen of the electronic watt hour meter according to FIG. 1, and FIG. 4 is a time chart for explaining the operation of the electronic watt hour meter according to the first embodiment.

  1 and 2, an electronic watt hour meter 1 supplies power supplied from a power supply device 3 to a load 4 via a transmission line 2 from an input / output terminal unit 11 to the inside of the electronic watt hour meter 1. The voltage detection unit 12 detects the voltage value, the current detection unit 13 detects the current value, inputs each detection value to the power calculation unit 14, calculates the instantaneous power, and calculates the instantaneous power calculation value. The amount of power is input to the central processing unit 15 to calculate the amount of electric power, and the amount of electric power is displayed on the display 50 that is a display unit by the display control unit 16 that is a control unit.

  Note that it is possible to set the blinking interval and the number of blinks of the display control unit 16 which is a control means from the outside of the electronic watt-hour meter 1 through the communication unit 17 and the blinking setting unit 18. The display 50 which is a display means has a segment display unit 51. The segment display unit 51 is a meter reading display unit 52 indicating that it is a meter reading screen, a month and date display unit 53 indicating a measurement value confirmation month and day, and its meter reading month. The measurement value display unit 54 displays the measurement value determined on the day, and the time zone display unit 55 displays the time zone in which the measurement value falls.

  Next, the operation of the first embodiment will be described with reference to FIG. FIGS. 3A, 3B, 3C, 3D, and 3E show specific display examples of the segment display unit 51 that constitutes a display screen that is sequentially switched. The display screen of the segment display unit 51 is automatically and sequentially switched at a predetermined time interval.

  FIG. 3A illustrates the display screen 501 of the segment display unit 51 indicating that the power meter value in the time zone 1 is 0.10 KW / h by the meter reading on July 1st. FIG. 3C illustrates a display screen 502 of the segment display unit 51 that similarly indicates that the metered value on July 1 indicates that the electric power measurement value in the time zone 2 is 0.02 KW / h. FIG. 3B illustrates a screen 502a displayed in the process of switching from FIG. 3A, which is the display screen for time zone 1, to FIG. 3C, which is the display screen for time zone 2.

  FIG. 3E illustrates a display screen 503 of the segment display unit 51 indicating that the metered value on July 1 indicates that the power measurement value in the time zone 3 is 0.02 KW / h. FIG. 3D illustrates a screen 503a that is displayed in the process of switching from FIG. 3C, which is the display screen of time zone 2, to FIG. 3E, which is the display screen of time zone 3.

As shown in FIG. 3A, after a screen 501 that displays the power amount of time zone 1 is displayed for a predetermined time, for example, 10 seconds, the power amount of time zone 2 is displayed as shown in FIG. Is switched to a screen 502a for displaying the date and time, and all or part of the display unit 53, the measurement value display unit 54, and the time zone display unit 55, which are display items on the screen, are, for example, twice every 0.1 seconds, for example, 0.5 seconds. The flashing state in which the lights are turned off and turned on alternately is changed to notify that the screen has been switched to the time zone 2.
After a predetermined flashing time has elapsed, the flashing operation is stopped after 0.5 seconds, for example, and the meter reading screen 502 in time zone 2 shown in FIG. 3C is lit and displayed for a predetermined time, for example, 10 seconds.

  Next, as shown in FIG. 3 (d), the screen is switched to a screen 503a that displays the amount of power in the time zone 3, and as shown in FIG. A blinking state that alternately turns off and on twice for a total of 0.5 seconds at intervals of seconds is notified to notify that the screen has been switched to time zone 3.

  After a predetermined flashing time has elapsed, the flashing operation is stopped after 0.5 seconds, for example, and as shown in FIG. 3E, the screen of time zone 3 is lit and displayed for a predetermined time, for example, 10 seconds, and then the above-described operation is repeated. The above-described blinking operation is controlled by the display control unit 16 such that the blinking operation is performed at an arbitrary period, for example, twice at 0.1 second intervals. The blinking interval and the number of blinks are controlled by the blinking setting unit 18 in FIG. It can be set arbitrarily, and can also be set from the outside via the communication unit 17.

  FIG. 4 is a time chart showing the display and switching status of the display screen for each time zone described above, and is displayed corresponding to FIGS. 3 (a), (b), (c), (d), and (e). This shows the meter reading screen and the time relationship between turning on and off the screen.

  The electronic watt-hour meter according to Embodiment 1 is configured as described above, and when the meter-reading screen is automatically switched to the next time zone screen at a predetermined interval, the state is switched to the next time zone screen. Since the screen is blinked to visually notify the timing of screen switching, it is possible to reduce oversight of the switched screen. In addition, since the blinking interval and the number of blinks can be arbitrarily set by the blinking setting unit 18, it is possible to provide a display form that matches the meter reading ability of the meter reader.

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described with reference to the drawings. Since the external configuration and basic circuit configuration of the electronic watt-hour meter are the same as those in FIGS. 1 and 2, illustration and description thereof are omitted.
The difference from the first embodiment is the display method when the display screen is switched.

  5A, 5B, 5C, 5D, and 5E show specific display examples of the segment display unit 51 that constitutes the display screen that is sequentially switched in the second embodiment. The meter reading date and the electric power measurement values in the time zones 1, 2, and 3 illustrate the same contents as FIG.

  In the second embodiment, as shown in FIG. 5 (a), after a screen 501 that displays the amount of power in time zone 1 is lit and displayed for a predetermined time, for example, 10 seconds, as shown in FIG. 5 (b), All or part of the month / day display unit 53, the measurement value display unit 54, and the time zone display unit 55, which are display items on the screen 501 of the time zone 1, are turned off at intervals of, for example, 0.1 second, for example, 0.5 seconds. A screen 501a in a blinking state in which lighting is alternately repeated is used to notify that the screen is in a state immediately before the screen is switched.

  After the flashing operation is stopped, for example, 0.5 seconds later, as shown in FIG. 5C, the screen is switched to a screen 502 for displaying the electric energy in the time zone 2 and is lit and displayed for a predetermined time, for example, 10 seconds. Thereafter, as shown in FIG. 5 (d), the screen 502 in the time zone 2 is summed up, for example, twice or at intervals of 0.1 seconds, for example, all or part of the display items on the screen, similar to FIG. 5 (b) described above. For example, a screen 502a in a blinking state that alternately turns off and on for 0.5 seconds is used to notify that the screen is in a state immediately before the screen is switched.

  Thereafter, as shown in FIG. 5 (e), the screen is switched to the screen 503 in the time zone 3, and is lit and displayed for a predetermined time, for example, 10 seconds. Thereafter, the above operation is repeated. The blinking operation described above is controlled by the display control unit 16 such that the blinking operation is performed at an arbitrary period, for example, twice at 0.1 second intervals. The blinking interval and the number of blinks are the same as in the first embodiment. It can be arbitrarily set by the blinking setting unit 18, and can also be set from the outside via the communication unit 17.

  FIG. 6 is a time chart showing the display and switching status of the display screen in each time zone in the second embodiment, and corresponds to FIGS. 5 (a), (b), (c), (d), and (e). The meter reading screen displayed and the time relationship between turning on / off the screen are shown.

  The electronic watt-hour meter according to the second embodiment is configured as described above, and when the meter reading screen is automatically switched to the screen of the next time zone at a predetermined interval, before switching to the screen of the next time zone. Since the screen of the previous time zone is blinked and the timing of screen switching is visually notified, it is possible to reduce oversight of the switched screen.

Embodiment 3 FIG.
Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a block diagram showing the configuration of the electronic watt-hour meter according to the third embodiment, and FIG. 8 is an explanatory diagram for explaining the switching state of the display screen of the electronic watt-hour meter according to the third embodiment. FIG. 9 is a time chart for explaining the operation of the electronic watt-hour meter according to the third embodiment. In these drawings, the same or corresponding parts as those in FIGS. 7 is different from FIG. 2 in that an illumination unit 56 as an illumination unit for illuminating the display unit 50 is provided on the back surface of the display unit 50, and an illumination control unit 19 as an illumination control unit for controlling the illumination unit 56 is provided. It is provided.
The illumination control unit 19 can set illumination conditions from the outside of the electronic watt-hour meter 1 via the communication unit 17 and the blinking setting unit 18.

  Next, the operation of the third embodiment will be described. FIGS. 8A, 8B, 8C, 8D, and 8E show specific display examples of the segment display unit 51 constituting the display screen that is sequentially switched. As in the first and second embodiments, the display screen of the segment display unit 51 is automatically and sequentially switched at predetermined time intervals.

  FIG. 8A illustrates a display screen 504 of the segment display unit 51 indicating that the power meter value in the time zone 4 is 0.10 KW / h by the meter reading on July 1st. FIG. 8C illustrates the display screen 505 of the segment display unit 51 that similarly indicates that the metered value on July 1 indicates that the power measurement value in the time zone 5 is 0.02 KW / h. FIG. 8B illustrates a screen 505a displayed in the process of switching from FIG. 8A, which is the display screen of the time zone 4, to FIG. 8C, which is the display screen of the time zone 5.

  FIG. 8E illustrates the display screen 506 of the segment display unit 51 indicating that the metered value on July 1 indicates that the power measurement value in the time zone 6 is 0.02 KW / h. FIG. 8D illustrates a screen 506a displayed in the process of switching from FIG. 8C, which is the display screen of the time zone 5, to FIG. 8E, which is the display screen of the time zone 6.

As shown in FIG. 8A, after a screen 504 that displays the power amount of time zone 4 is displayed for a predetermined time, for example, 10 seconds, the power amount of time zone 5 is changed as shown in FIG. 8B. The screen is switched to the screen 505a to be displayed. For example, the lighting unit 56 is turned on and off alternately at intervals of 0.1 second, for a total of, for example, 0.5 seconds, so that the screen is switched to the time zone 5.
The flashing operation is stopped after a predetermined flashing time has elapsed, and the meter reading screen 505 in the time zone 5 shown in FIG. 8C is displayed for a predetermined time, for example, 10 seconds.

  Next, as shown in FIG. 8 (d), the screen is switched to a screen 506a that displays the amount of power in time zone 6, and, for example, twice at intervals of 0.1 second for a total of 0.5 seconds, as in FIG. 8 (b). A blinking state in which the lights 56 are alternately turned off and turned on alternately is notified to notify that the screen has been switched to the time zone 6.

  After the flashing time has elapsed, the flashing operation is stopped, and as shown in FIG. 8E, the screen of the time zone 6 is displayed for a predetermined time, for example, 10 seconds, and then the above-described operation is repeated. The above-described blinking operation of the illumination unit 56 is controlled by the display control unit 16 at an arbitrary period, for example, twice at 0.1 second intervals. It can be arbitrarily set by the setting unit 18 and can also be set from the outside via the communication unit 17.

  FIG. 9 is a time chart showing the display and switching status of the display screen of the third embodiment, and is displayed corresponding to FIGS. 8 (a), (b), (c), (d), and (e). This shows the time relationship between turning on and off the meter reading screen and the illumination unit 56.

  The electronic watt-hour meter according to Embodiment 3 is configured as described above, and when the meter-reading screen is automatically switched to the next time zone screen at a predetermined interval, the state is switched to the next time zone screen. Since the lighting unit blinks and the screen switching timing is visually notified, the oversight of the switched screen can be reduced.

Embodiment 4 FIG.
Next, a fourth embodiment of the present invention will be described with reference to the drawings. Since the basic circuit configuration of the electronic watt-hour meter is the same as that shown in FIG. The difference from the third embodiment is the way of display when the display screen is switched.

  FIGS. 10A, 10B, 10C, 10D, and 10E show specific display examples of the segment display unit 51 constituting the display screen that is sequentially switched in the fourth embodiment. The meter reading date and the electric power measurement values in the time zones 4, 5, and 6 exemplify the same contents as FIG.

  In the fourth embodiment, as shown in FIG. 10A, after a screen 504 that displays the amount of power in the time zone 4 is displayed for a predetermined time, for example, 10 seconds, as shown in FIG. The lighting unit 56 is changed to a blinking screen 504a that repeatedly turns off and on alternately, for example, for 0.5 seconds, for example, at intervals of 0.1 second, while the screen of the band 4 remains unchanged, and notifies that the screen is in a state immediately before the screen is switched. To do.

  After the blinking operation is stopped, for example, 0.5 seconds later, as shown in FIG. 10C, the screen is switched to a screen 505 for displaying the electric energy in the time zone 5 and displayed for a predetermined time, for example, 10 seconds. Thereafter, as shown in FIG. 10 (d), the lighting unit 56 is turned off and on twice, for example, at intervals of 0.1 second, for example, for 0.5 seconds as in FIG. The screen 505a blinks alternately and is notified that the screen is in a state immediately before the screen is switched. Thereafter, as shown in FIG. 10E, the screen is switched to the screen 506 in the time zone 6 and displayed for a predetermined time, for example, 10 seconds, and then the above-described operation is repeated.

  FIG. 11 is a time chart showing the display and switching status of the display screen in each time zone in the fourth embodiment, and corresponds to FIGS. 10 (a), (b), (c), (d), and (e). This shows the time relationship between the meter reading screen displayed and the lighting section turning on and off.

  The electronic watt-hour meter according to the fourth embodiment is configured as described above, and when the meter reading screen is automatically switched to the screen of the next time zone at a predetermined interval, before switching to the screen of the next time zone. Since the illumination unit blinks with the screen of the previous time zone and the timing of screen switching is visually notified, it is possible to reduce oversight of the switched screen.

Embodiment 5 FIG.
Next, a fifth embodiment of the present invention will be described with reference to the drawings. FIG. 12 is a block diagram showing a configuration of an electronic watt-hour meter according to the fifth embodiment, FIG. 13 is an explanatory diagram for explaining a switching state of the electronic watt-hour meter according to the fifth embodiment, and FIG. FIG. 10 is a time chart for explaining the operation of the electronic watt-hour meter according to the fifth embodiment. In these drawings, the same or corresponding parts as those in FIGS.

  The difference from FIG. 2 is that a light emitting unit 57 as a light emitting unit is provided in the vicinity of the display unit 50 and a light emission control unit 20 is provided as a light emission control unit. The light emission control unit 20 can set light emission conditions from the outside of the electronic watt-hour meter 1 via the communication unit 17 and the blinking setting unit 18.

  Next, the operation of the fifth embodiment will be described. FIGS. 13A, 13B, 13C, 13D, and 13E show specific display examples of the segment display unit 51 constituting the display screen that is sequentially switched. The display screen of the segment display unit 51 is automatically and sequentially switched at a predetermined time interval, as in each embodiment.

  FIG. 13A exemplifies a display screen 507 of the segment display unit 51 indicating that the power measurement value in the time zone 7 is 0.10 KW / h by the meter reading on July 1st. FIG. 13C illustrates a display screen 508 of the segment display unit 51 that similarly indicates that the metered value on July 1 indicates that the power measurement value in the time zone 8 is 0.02 KW / h. FIG. 13B illustrates a screen 508a displayed in the process of switching from FIG. 13A, which is the display screen for the time zone 7, to FIG. 13C, which is the display screen for the time zone 8.

  FIG. 13E illustrates a display screen 509 of the segment display unit 51 indicating that the metered value on July 1 indicates that the power measurement value in the time zone 9 is 0.02 KW / h. FIG. 13D illustrates a screen 509a displayed in the process of switching from FIG. 13C, which is the display screen of the time zone 8, to FIG. 13E, which is the display screen of the time zone 9.

As shown in FIG. 13 (a), after a screen 507 for displaying the power amount in time zone 7 is displayed for a predetermined time, for example, 10 seconds, the power amount in time zone 8 is changed as shown in FIG. 13 (b). The screen is switched to the screen 508a to be displayed, for example, in a blinking state in which the light emitting unit 57 is alternately turned off and turned on twice at 0.1 second intervals for a total of, for example, 0.5 seconds, to notify that the screen has been switched to the time zone 8.
After a predetermined flashing time has elapsed, the flashing operation is stopped after 0.5 seconds, for example, and the meter reading screen 508 in time zone 8 shown in FIG. 13C is displayed for a predetermined time, for example, 10 seconds.

  Next, as shown in FIG. 13 (d), the screen is switched to a screen 509a that displays the amount of power in the time zone 9, and as in FIG. 13 (b), for example, twice at 0.1 second intervals for a total of 0.5 seconds. A blinking state in which the lights 57 are alternately turned off and on is alternately blinked to notify that the screen has been switched to the time zone 9.

After a predetermined flashing time elapses, for example, 0.5 seconds later, the flashing operation is stopped, and as shown in FIG. 13E, the screen of the time zone 9 is displayed for a predetermined time, for example, 10 seconds, and then the above-described operation is repeated.
Note that the blinking operation of the light emitting unit 57 described above is controlled by the display control unit 16 at an arbitrary period, for example, twice at 0.1 second intervals. It can be arbitrarily set by the setting unit 18 and can also be set from the outside via the communication unit 17.

  FIG. 14 is a time chart showing the display and switching status of the display screen in each time zone in the fifth embodiment, and corresponds to FIGS. 13 (a), (b), (c), (d), and (e). This shows the time relationship between the meter reading screen displayed and the light-emitting section on / off.

  The electronic watt-hour meter according to the fifth embodiment is configured as described above, and when the meter reading screen is automatically switched to the screen of the next time zone at a predetermined interval, the state is switched to the screen of the next time zone Since the light emitting unit blinks and the timing of screen switching is visually notified, it is possible to reduce oversight of the switched screen. In addition, since the blinking interval and the number of blinks can be arbitrarily set by the blinking setting unit 18, it is possible to provide a display form that matches the meter reading ability of the meter reader.

Embodiment 6 FIG.
Next, a sixth embodiment of the present invention will be described with reference to the drawings. Since the basic circuit configuration of the electronic watt-hour meter is the same as that of FIG. 12, illustration and description thereof are omitted. The difference from the fifth embodiment is the way of display when the display screen is switched.

  FIGS. 15A, 15B, 15C, 15D, and 15E show specific display examples of the segment display unit 51 constituting the display screen that is sequentially switched in the sixth embodiment. The metered date and the power measurement values in the time zones 7, 8, and 9 illustrated in FIG.

  In the sixth embodiment, as shown in FIG. 15A, after a screen 507 for displaying the amount of power in the time zone 7 is displayed for a predetermined time, for example, 10 seconds, as shown in FIG. The light emitting unit 57 is changed to a blinking screen 507a that is alternately turned off and turned on twice, for example, for 0.5 seconds, for example, at intervals of 0.1 second while the screen of the band 7 is kept, and notification that the screen is in a state immediately before the screen is switched. To do.

  After the blinking operation is stopped, for example, 0.5 seconds later, as shown in FIG. 15C, the screen is switched to a screen 508 for displaying the electric energy in the time zone 8 and displayed for a predetermined time, for example, 10 seconds. Thereafter, as shown in FIG. 15 (d), the light emitting unit 57 is turned off and turned on at a 0.1 second interval for a total of, for example, 0.5 seconds, as in FIG. The screen 508a blinks alternately and is notified that the screen is in a state immediately before the screen is switched. After that, as shown in FIG. 15E, the screen is switched to the screen 509 of the time zone 9 and displayed for a predetermined time, for example, 10 seconds. Thereafter, the above operation is repeated.

  FIG. 16 is a time chart showing the display and switching status of each time zone in the sixth embodiment, and corresponds to FIGS. 15 (a), (b), (c), (d), and (e). This shows the time relationship between the meter reading screen displayed and the light-emitting section on / off.

  The electronic watt-hour meter according to the sixth embodiment is configured as described above, and when the meter reading screen is automatically switched to the screen of the next time zone at a predetermined interval, before switching to the screen of the next time zone. Since the light emitting unit blinks while keeping the screen of the previous time zone and the screen switching timing is visually notified, it is possible to reduce oversight of the switched screen.

It is the schematic which shows the external appearance structure of the electronic watt-hour meter by Embodiment 1 of this invention. 1 is a block diagram illustrating a configuration of an electronic watt-hour meter according to Embodiment 1. FIG. FIG. 6 is an explanatory diagram for explaining a switching state of a display screen of the electronic watt-hour meter according to the first embodiment. 3 is a time chart of the electronic watt-hour meter according to the first embodiment. It is explanatory drawing for demonstrating the switching state of the display screen of the electronic watt-hour meter by Embodiment 2 of this invention. 6 is a time chart of the electronic watt-hour meter according to the second embodiment. It is a block diagram which shows the structure of the electronic watt-hour meter by Embodiment 3 of this invention. FIG. 10 is an explanatory diagram for explaining a switching state of a display screen of an electronic watt-hour meter according to a third embodiment. 10 is a time chart of the electronic watt-hour meter according to Embodiment 3. It is explanatory drawing for demonstrating the switching state of the display screen of the electronic watt-hour meter by Embodiment 4 of this invention. 10 is a time chart of an electronic watt-hour meter according to Embodiment 4. It is a block diagram which shows the structure of the electronic watt-hour meter by Embodiment 5 of this invention. FIG. 10 is an explanatory diagram for explaining a switching state of a display screen of an electronic watt-hour meter according to a fifth embodiment. 10 is a time chart of an electronic watt-hour meter according to Embodiment 5. It is explanatory drawing for demonstrating the switching state of the display screen of the electronic watt-hour meter by Embodiment 6 of this invention. 10 is a time chart of an electronic watt-hour meter according to a sixth embodiment.

Explanation of symbols

1 electronic watt-hour meter, 11 input terminal, 12 voltage detector, 13 current detector,
14 power calculation unit, 15 central calculation unit, 16 display control unit, 17 communication unit,
18 flashing setting unit, 19 illumination control unit, 20 light emission control unit, 50 display unit,
51 segment display section, 52 meter reading display section, 53 month and day display section,
54 measurement value display section, 55 time zone display section, 56 illumination section, 57 light emitting section,
501 Meter reading screen for time zone 1, 502 Meter reading screen for time zone 2,
503 Meter reading screen for time zone 3, 504 Meter reading screen for time zone 4,
505 Meter reading screen for time zone 5, 506 Meter reading screen for time zone 6,
507 Meter reading screen for time zone 7, 508 Meter reading screen for time zone 8,
509 Meter reading screen for time zone 9.

Claims (4)

Voltage / current measuring means for measuring the voltage value and current value, calculating means for calculating the amount of power for each time zone based on the voltage value and current value, and the amount of power calculated by the calculating means for each time zone A display means for displaying on the display screen and switching the display screen in order according to a time zone, an illuminating means for illuminating the display screen, and a display screen for a power amount in a predetermined time zone Control means for switching to a display screen for power consumption in another time zone after time display; and illumination control means for causing the lighting means to flash for another predetermined time after switching to the display screen for power consumption in another time zone An electronic watt-hour meter comprising flashing setting means for setting the flashing time and number of times. Voltage / current measuring means for measuring the voltage value and current value, calculating means for calculating the amount of power for each time zone based on the voltage value and current value, and the amount of power calculated by the calculating means for each time zone A display means for displaying on the display screen and switching the display screen in order according to a time zone, an illuminating means for illuminating the display screen, and a display screen for a power amount in a predetermined time zone After the time display, the control means for switching to the power amount display screen for another time zone and the power amount display screen for the predetermined time zone are displayed for a predetermined time, and then the power amount display for the other time zone is displayed. An electronic watt-hour meter comprising: illumination control means for causing the illumination means to blink for another predetermined time before switching to a screen; and blinking setting means for setting the blinking time and number of times.   Voltage / current measuring means for measuring the voltage value and current value, calculating means for calculating the amount of power for each time zone based on the voltage value and current value, and the amount of power calculated by the calculating means for each time zone Display means for displaying on the display screen and switching the display screen in order according to the time zone, a light emitting means provided near the display screen for emitting light, and electric energy in a predetermined time zone After the display screen is displayed for a predetermined time, the control means for switching to the display screen for the electric energy in another time zone, and the light emission means blinks for another predetermined time after the change to the display screen for the electric energy in the other time zone An electronic watt-hour meter comprising: a light emission control means for causing flashing; and a flashing setting means for setting the flashing time and number of times.   Voltage / current measuring means for measuring the voltage value and current value, calculating means for calculating the amount of power for each time zone based on the voltage value and current value, and the amount of power calculated by the calculating means for each time zone Display means for displaying on the display screen and switching the display screen in order according to the time zone, a light emitting means provided near the display screen for emitting light, and electric energy in a predetermined time zone After the display screen is displayed for a predetermined time, the control means for switching to the power amount display screen for another time zone, and after the power amount display screen for the predetermined time zone is displayed for a predetermined time, the other time zone An electronic watt-hour meter comprising: a light emission control means for causing the light emission means to blink for another predetermined time before switching to the display screen for the amount of power, and a blinking setting means for setting the time and number of times of the blinking.

Images