JP2000013933A - Control switchboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the rush current which is generated when the power supply is restored or returns by issuing an alarm before the consumed exceeds a preset current value and controlling branch circuit breakers in the order of priority. SOLUTION: The measurement of a consumed current is performed by using the current transformer of a measuring section 3 and branch circuit breakers 10 indicate their cutoff or thrown-in states by flickering a digital indicator 7 or changing the indicating color of the indicator 7. When the power supply is interrupted, in addition, all of the breakers 10 (1)-(4) are cut-off. When the power supply is restored, the breakers 10 (1)-(4) are successively thrown in the order of, for example, priority by deciding their delay time. Consequently, a rush current suppressing function which can avoid the malfunction of a controlled switchboard by a peak current by inhibiting the rush current (a momentary large current) which is generated when the power supply is restored is obtained. When a power failure occurs, all of the branch circuit breakers are cut-off and, when the power supply is restored, the circuit breakers are successively thrown in accordance their prescribed delay time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control switchboard, and more particularly to a home-use peak cut control switchboard for generating an alarm due to excessive use of electricity and for turning off / on a branch breaker.

[0002]

2. Description of the Related Art With the spread of home electric appliances, household electric charges are increasing more and more. Devices that automatically shut off or warn when the amount of electricity used at home exceeds a predetermined level are used.

For example, Japanese Unexamined Patent Publication No. Hei 3-285518 discloses a power control device for home electric appliances in which the supply of home electric appliances is sequentially stopped in accordance with a priority order when an overcurrent occurs.

[0004]

In the above-mentioned conventional control and distribution device, when the contract current is exceeded, the electric devices are sequentially cut off without prior notice according to a predetermined cut-off order. Therefore, since the cutoff relays of the respective devices are operated in the scheduled order and the power supply is individually stopped, it is unknown which device is currently operating or stopped.

Accordingly, an object of the present invention is to notify the occupant of an excessive use of electricity with an alarm sound or the like to alert the occupant, to switch on / off the breaker according to the priority order, and to restore or recover after a power failure. It is an object of the present invention to provide a control and distribution device effective at home that can suppress a rush current (a large instantaneous current) in such a case.

[0006]

In order to solve the above-mentioned problems, a control switchboard according to the present invention has the following characteristic configuration.

(1) In a control switchboard including a contract breaker, a main breaker and a plurality of branch breakers, a current consumption measuring section is provided, and an alarm means for generating an alarm before the current consumption exceeds a preset current value is provided. A control switchboard characterized by having.

(2) The control switchboard according to (1), wherein priorities are assigned to the plurality of branch breakers in advance, and the plurality of branch breakers are turned on / off according to the priorities in accordance with the values measured by the current consumption measuring unit.

(3) shutting off the plurality of branch breakers;
The control switchboard according to the above (1) or (2), further comprising a display unit that indicates a closed state.

(4) When the power supply is interrupted, all of the plurality of branch breakers are shut off, and when the power is restored, the plurality of branch breakers are turned on according to a predetermined delay time to suppress the rush current. (1), (2) ) Or the control switchboard of (3).

(5) The control switchboard according to any one of the above (1) to (4), including a battery for energizing a control section for controlling the turning on / off of the branch breaker.

(6) The control switchboard of (5), wherein the battery is a rechargeable battery that is automatically charged by a power supply.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a control switchboard according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a block diagram of a preferred embodiment of the control switchboard of the present invention. FIG. 2 is a flowchart for explaining a breaker cutoff operation of the control switchboard of FIG. FIG. 3 is a flowchart for explaining a breaker closing operation of the control switchboard of FIG.

First, the configuration of the control switchboard of the present invention will be described with reference to FIG. This control switchboard is the same as a conventional switchboard installed at a service entrance of a general household in that it has a contract breaker 1, a main breaker 2, and a branch breaker 10 (to). Includes a control unit 5, a priority setting unit 6, a digital display 7, a speaker 8, a battery 9, and a measurement unit (CT) 3 in addition to the above-described components.

Next, the operation of the control switchboard of the present invention will be described with reference to FIGS. First, after the start 20, in the initial setting 21, the priority order of the branch breakers 10, the set values of the first stage processing and the second stage processing, and the closing delay time of the branch breaker 10 of the power recovery processing are set by the priority order setting unit 6. Set.

In the consumption current monitoring 1 step 22, it is determined whether or not the consumption current value exceeds the first-stage processing value set in the initialization 21 in the reading destination. If the first stage processing value is exceeded, a warning sound (buzzer) 23 is generated by the speaker 8. If the second stage processing value is exceeded, the branch breaker with a low priority set by the priority setting section 6 is cut off (step 24).

In step 25 of the current consumption monitoring 2, the current consumption value is read again. It is determined whether the read current consumption exceeds the second processing value. If the second processing value is exceeded, the next priority branch breaker
Is shut off (step 26). Hereinafter, consumption current monitoring 3
(Step 27) is repeated in the same manner, and the branch breakers are cut off until the value becomes smaller than the second processing value.

Next, when the current consumption decreases to a predetermined value for some reason, the branch breakers 10 are sequentially turned on in accordance with the procedure (steps 30 to 37) shown in FIG.
Steps 30 to 37 are substantially the same as steps 20 to 27 in the breaker cut-off flowchart of FIG. 2, and a detailed description thereof will be omitted. However, the turning on of the branch breaker 10 is performed in the order of higher priority or lower, and in the reverse order to the case of shutting off.

In these operations, the current consumption is measured using the current transformer of the measuring unit 3. In addition, the branch breaker 10 can display the shut-off or closed state by blinking the digital display 7 or switching the display color.

When the power supply is interrupted, all of the branch breakers 10 to are shut off. When the power is restored, a delay time is determined, and branch breakers to are sequentially turned on in accordance with, for example, the priority order. This allows
A rush current suppression function is provided that prevents a rush current at the time of power restoration and prevents a malfunction of the control switchboard due to a peak current.

In the control switchboard of the present invention, the turning on / off of the breaker 10 is preferably operated by the built-in battery 9. Thus, the breaker 10 can be reliably turned off or turned on even when the power is cut off. Further, the battery 9 is a rechargeable (secondary battery) and is automatically charged when the power supply is normal (when there is no power failure), so that it is possible to cope with a power failure for a sufficiently long time.

The configuration and operation of the preferred embodiment of the control switchboard of the present invention have been described above. However, those skilled in the art can easily understand that the present invention can be variously modified without departing from the gist thereof. The number of branch breakers is not limited to four, and may be any number as necessary. In addition, the priority order for turning on / off these branch breakers, the delay time for turning on the breakers when the power is restored after a power failure, and the like can be freely selected by operating buttons (not shown).

[0023]

As will be understood from the above description, according to the control panel of the present invention, priorities are set in advance according to the importance of the electric equipment to be used, and when the power consumption is likely to exceed the contract value, Will warn this with a buzzer, and as a second step, it will shut off sequentially from the lower priority branch breaker,
It is possible to minimize the effects of overloading. Further, it is possible to display the cutoff / closing state of the branch breaker. Further, at the time of a power failure, it is possible to shut off all the branch breakers, and to turn on the branch breakers according to a predetermined delay time at the time of power recovery, thereby preventing the rush electric circuit. Therefore, it is effective for home switchboards and the like.

[Brief description of the drawings]

FIG. 1 is a block diagram of a preferred embodiment of a control switchboard of the present invention.

FIG. 2 is a flowchart illustrating a shut-off operation of a branch breaker of the control switchboard shown in FIG.

FIG. 3 is a flowchart illustrating a closing operation of a branch breaker of the control switchboard shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Contract breaker 2 Main breaker 3 Current consumption measurement part 5 Control part 6 Priority setting part 7 Digital display 8 Speaker 9 Battery 10 Branch breaker

Claims (6)

[Claims] In a control switchboard including a contract breaker, a main breaker, and a plurality of branch breakers, a current consumption measuring section is provided, and an alarm means for generating an alarm before the current consumption exceeds a preset current value is provided. A control switchboard characterized in that: 2. A method according to claim 1, wherein priorities are assigned to said plurality of branch breakers in advance, and said plurality of branch breakers are turned on / off in accordance with a priority order according to a value measured by said current consumption measuring section. Control switchboard as described. 3. The control switchboard according to claim 1, further comprising a display unit that indicates a cut-off / on state of the plurality of branch breakers. 4. The power supply according to claim 1, wherein all of said plurality of branch breakers are cut off when a power supply is interrupted, and said rush current is suppressed by returning said plurality of branch breakers according to a predetermined delay time when power is restored. 4. The control switchboard according to 2 or 3. 5. The control switchboard according to claim 1, further comprising a battery for energizing a control unit for controlling the turning on / off of the branch breaker. 6. The control switchboard according to claim 5, wherein the battery is a rechargeable battery that is automatically charged by a power supply.