JPH04261308A - Distribution system - Google Patents

Abstract

PURPOSE:To easily grasp an overloaded section by providing a distribution board separately installed in each section with a circuit-breaker for interrupting a branch circuit and with an alarm for giving warning when the current of a current detector reaches an over current-warning level. CONSTITUTION:Each section (A-D in the drawing) is provided with an auxiliary distribution board F2 and a machine room E is provided with a main distribution board F1. Electricity is supplied from the main distribution board F1 to the auxiliary distribution board F2 via feed wiring and circuit-breaker. The auxiliary distribution board F2 is provided with the circuit-breaker and current detector (both are unshown) for each section A-D to supply electricity to a plurality of receptacles in the section. When the indicated value of the current detector reaches an overcurrent-warning level, a notifying alarm 5 is operated to give warning. Thus, each partition is prevented from the interruption by overcurrent so that OA equipments, etc., are prevented from inconveniences by service interruption.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power distribution system in which a plurality of branch circuits branched from a main line are each provided with a branch circuit breaker.

0002

[Prior Art] Figure 3 shows an example of a conventional power distribution system.
Shown below. This figure 3 shows the in-building power distribution system.
The distribution board F installed in the machine room E is equipped with a main circuit breaker inserted into the main line and a plurality of branch circuit breakers inserted into branch circuits branched from the main line. A plurality of outlets 3 are connected to a branch circuit via a circuit breaker, and power is supplied to the load equipment through each outlet 3.

0003

[Problems to be Solved by the Invention] By the way, with the recent progress in office automation, there are problems such as the contents of a computer's memory being erased or a copy machine becoming jammed if the power is inadvertently cut off. be. Therefore, as shown in FIG. 4, there is a current detector 4 that detects the current flowing in the main line, and a notice that issues an advance warning in response to the output of the current detector 4 when the current flowing in the main line reaches the overcurrent notice level. There is one in which an alarm device 5 is installed on the distribution board F. Note that the neutral wire of the power source is connected to a neutral terminal 7 having a plurality of terminals.

However, the above-mentioned distribution board F is generally installed in an inconspicuous place in the building such as the machine room E, and there is a problem that it is difficult to recognize advance warnings, and even if they can be recognized, Since electricity is commonly distributed from distribution board F to multiple sections, for example, sections A to D in the case of Fig. 3, there is a problem that it is not possible to determine which section the advance warning is for. there were.

[0005] Furthermore, even if the main line current is detected and an advance warning is issued as described above, the power supply may be cut off without any advance warning. In other words, even if the current flowing in one of the branch circuits reaches a level that causes the branch circuit breaker 2 to perform a breaking operation, the total current flowing in the main line may not reach the overcurrent warning level. be.

[0006] The present invention has been made in view of the above-mentioned points, and its purpose is to be able to reliably give advance notice that power will be cut off, and to easily locate the section where the power will be cut off. The aim is to provide a power distribution system that can be understood in detail.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an individual distribution board for at least each section, and provides a branch cutoff for individually cutting off a plurality of branch circuits branched from the main line. A current detector that detects when the current flowing through each branch circuit reaches the overcurrent warning level is installed in the above distribution board, and installed in the division corresponding to each distribution board within the distribution board. A warning alarm is provided to issue a warning in accordance with the output of the current detector.

[0008]

[Operation] The present invention is configured as described above, and detects the current flowing in the main line by detecting in each branch circuit that the current value has reached the overcurrent warning level and issuing a warning warning. In addition, by installing an advance alarm in each compartment and activating the advance alarm with the output of a current detector that detects the current in the branch circuit in that division. This makes it easy to identify areas where the current has reached the overcurrent warning level.

[0009]

Embodiment FIGS. 1 and 2 show an embodiment of the present invention. This embodiment shows a case where the present invention is applied to an in-building power distribution system, and the inside of the building is divided into sections A to D as shown in FIG. In this embodiment, power distribution boards F1 and F2 are provided in each of the compartments A to D together with the machine room E. Here, in the power distribution board F1 (hereinafter referred to as the main power distribution board) in the machine room E, the main line is directly routed to each of the sections A to D as shown in FIG. 2(a). In addition, this distribution board F1
A circuit breaker 6 is inserted into each of the feed wiring sections. Then, as shown in Fig. 2(b), the main line is branched at the distribution board F2 (hereinafter referred to as sub-distribution board) installed in each section A to D, and multiple outlets 3 are connected to each branch circuit. It has been done. Each branch circuit in the sub-distribution board F2 is provided with a branch circuit breaker 2 and a current detector 4 for detecting the current flowing in the branch circuit. For example, on the ceiling of each section A to D, as shown in FIG. 1, an advance warning alarm 5 is installed to receive the output of the current detector 4 and issue an alarm, so that the current value below which the branch circuit breaker 2 performs a breaking operation is installed. When any of the current detectors 4 detects that the set overcurrent warning level has been reached,
Give advance warning. Here, the advance alarm device 5 and the current detector 4
In order to omit the wiring, the alarm signal may be sent from the current detector 4 to the warning alarm device 5 wirelessly (by light, ultrasonic waves, radio waves, etc.).

For example, if a specific load device is energized and an advance warning is issued, if that load device is turned off, power will not be energized to other load devices connected to the same distribution circuit. You can prevent it from being stopped. Note that if the current detector 4 is equipped with a display means such as a meter that indicates the value of the current flowing in the branch circuit, the current flowing in each branch circuit can be recognized from the display of the current detector 4, and the load By adjusting the branch circuits that connect devices, it is possible to prevent problems such as, for example, load devices being connected to a specific branch circuit in a concentrated manner, resulting in frequent warning warnings. It is also possible to adjust the connection state of load devices so as to maintain the balance of the phase-to-phase current of the main line.

By the way, in the case of this embodiment, the main distribution board F1 does not branch the main line, but it may branch depending on the situation. A branch circuit breaker 2 and a current detector 4 may be provided on the panel F2 side.

0012

Effects of the Invention As described above, the present invention provides an individual distribution board for at least each section, a branch circuit breaker for respectively interrupting a plurality of branch circuits branched from the main line, and A current detector that detects when the current reaches the overcurrent warning level is installed in the above distribution board, and the output of the current detector installed in the distribution board is installed in the section corresponding to each distribution board. We have an advance warning device that will give you a warning when the time comes.
It is possible to detect in each branch circuit that the current value has reached the overcurrent warning level and issue a warning warning, which eliminates the possibility of not being able to give a warning warning as in the case of detecting the current flowing in the main line. An alarm is provided in each compartment, and the warning alarm is activated by the output of the current detector that detects the current in the branch circuit in that compartment, so it is possible to easily identify the compartment in which the current has reached the overcurrent warning level.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2(a) is a configuration diagram of a main distribution board. (b) is a configuration diagram of a sub-distribution board.

FIG. 3 is a configuration diagram of a conventional example.

FIG. 4 is a configuration diagram of the distribution board same as above.

[Explanation of symbols]

A to D section F2 Distribution board 2 Branch circuit breaker 4 Current detector 5. Advance warning device

Claims (1)

[Claims] Claim 1: At least a separate distribution board is provided in each section, and a branch circuit breaker is provided to respectively cut off a plurality of branch circuits branched from the main line, and the current flowing in each branch circuit reaches an overcurrent warning level. The above-mentioned distribution board is equipped with a current detector that detects the occurrence of an accident, and an advance warning is issued in accordance with the output of the current detector installed in the distribution board in the section corresponding to each distribution board. A power distribution system characterized by having a power supply.