JPH07231551A - Power supply - Google Patents

Abstract

PURPOSE:To interrupt an electric apparatus of low priority so that the current through a breaker does not exceed a rated capacity by setting the priority for a plurality of electric apparatus. CONSTITUTION:A switch control program is stored in the memory of a computor control unit 12. Currents fed to a plurality of electric apparatus 9, 10, 11 connected with a breaker 2 are detected by the ammeters in the controllers for corresponding switches 6, 7, 8 and fed to the computor control unit 12. When the total current exceeds a preset upper limit, a switch of lowest priority is selected according to the switch control program and a switch OFF signal is fed to the controller for that switch thus interrupting the feeder line for electric apparatus. When the total current drops below a preset lower limit, a switch ON reset signal is fed to the controller according to the priority thus resetting that switch.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for supplying power to various electric devices via a breaker, and more particularly to a power supply device for controlling the current value of the breaker so that the breaker does not operate.

[0002]

2. Description of the Related Art Conventionally, a plurality of electric devices are connected through a connector after one breaker which is connected to a power source. The breaker has a rated current capacity, and shuts off the electric circuit when an overcurrent exceeding this capacity flows.

[0003]

When the breaker is turned off, power supply to all electric devices connected after the breaker is stopped. However, there may be a difference in importance between the electric devices to be used, and in this case, it is desirable to leave the electric devices of high importance and stop the power supply of only the electric devices of low importance. The present invention prioritizes a plurality of electric devices connected to a breaker, and stops supplying power to a low-priority electric device before the breaker is in a state of being cut off. The purpose is to avoid the situation where the power supply to the

[0004]

To achieve the above object, according to the present invention, power is supplied to a plurality of electric devices through breakers, and the breakers are cut off when a current exceeding a rated current capacity flows through the breakers. In a power supply device configured to stop the supply of power to the device, an ammeter connected to each electric path of the plurality of electric devices, and a controller connected to each electric path of the plurality of electric devices With a switch and a current detected by each of the ammeters to open and close the switch based on priority so that the total current supplied to the plurality of electrical devices does not exceed the rated current capacity of the breaker. And a computer control unit for controlling.

[0005]

The computer control unit monitors the current value flowing through the breaker based on the measured value of the ammeter of each switch. When the current value flowing through the breaker exceeds the rated current capacity of the breaker, the computer control unit selects a switch with a lower rank and shuts it off based on the priority that is programmed in advance. Prevent the current from flowing.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. Reference numeral 1 is a power source and 2 is a breaker, which has a rated current capacity. A plurality of connectors 3, 4, 5 are connected in parallel to the breaker 2, and switches 6, 7, 8 with a controller (not shown) including an ammeter (not shown) are provided in each of the connectors 3, 4, 5 Various electric devices 9, 10 and 11 having arbitrary variable current capacities are connected via.

A power supply 1 is supplied to the electric devices 9, 10, 11 through the breaker 2, the connectors 3, 4, 5 and the switches 6, 7, 8.

The controllers of the switches 6, 7 and 8 are connected to the computer control unit 12.

The computer control unit 1
A switch control program is input to the memory of No. 2. The opening / closing control program includes electric devices 9, 10, 1
The switches 6, 7, and 8 are prioritized according to their respective importance levels. Computer control unit 12
In order to control the on / off states of the switches 6, 7 and 8 by monitoring the current values of the electric paths of the electric devices 9, 10 and 11 so that the current value flowing through the breaker 2 is within the rated capacity. .

The value of the current supplied to each electric device 9, 10, 11 is detected by an ammeter in the controller of the switches 6, 7, 8 corresponding to these electric devices 9, 10, 11, and The current value is the computer control unit 1
Entered in 2.

Computer control unit 12
Is based on the stored switch control program so that the total sum of the energization current values of all the electric devices 9, 10, 11 does not exceed the rated current capacity of the breaker 2.
When the total of the energization current values of 0 and 11 exceeds the preset upper limit value, a switch-off signal is sent to the switch with the lowest priority selected according to the priority, for example, the controller of 6,
The switch 6 is switched off, and the power supply line of the electric device 9 connected to the switch 6 is cut off.

If the total value of the currents supplied to the electric devices 9, 10 and 11 does not fall below the upper limit value, the other switches are shut off based on the priority.

When the total value of the electric currents supplied to the electric devices 9, 10 and 11 becomes lower than the set lower limit value, the switch-on state is returned to the switch-off switch, for example, the controller of 6, according to the priority order. A signal can be sent to return the switch 6 to the switch-on state.

The switch-on / off control states of the switches 6, 7 and 8 are displayed by the computer control unit 12 by sound and light as required.

[0015]

As described above, according to the present invention, a plurality of electric devices are prioritized, and the electric paths of the electric devices are controlled to be opened and closed so that a current exceeding the rated current capacity does not flow to the breaker. As a result, it is possible to prevent problems caused by breaking the breaker.

[Brief description of drawings]

FIG. 1 is a block diagram of the present invention.

[Explanation of symbols] 1 power supply 2 breaker 3 connector 4 connector 5 connector 6 switch 7 switch 8 switch 9 electrical device 10 electrical device 11 electrical device 12 computer control unit

Claims (1)

[Claims] 1. A power supply for supplying electric power to a plurality of electric devices through a breaker, and when a current exceeding a rated current capacity flows through the breaker, the breaker is shut off to stop the supply of power to the plurality of electric devices. In the supply device, an ammeter connected to each electric path of the plurality of electric devices,
A switch with a controller connected to each electric path of the plurality of electric devices, and the detection current of each ammeter is monitored, and the total current supplied to the plurality of electric devices is the rated current capacity of the breaker. A power supply device, comprising: a computer control unit that controls opening and closing of the switch based on a priority order so as not to exceed the power supply.