JPH0487535A - Concentrated breaker monitor - Google Patents

Abstract

PURPOSE:To concentratvely monitor multiple breakers by setting different addresses for respective distribution boards, selecting a distribution board M on a concentrate monitoring board through an upper address signal line, selecting a breaker in a distribution board M through a lower address signal line and then transmitting the function of a selected breaker through a relay and a multiplexer on a monitor signal line X1. CONSTITUTION:When a distribution board is designated through upper address signal lines AN-AM and relays Ql-Qm in the distribution board are designated through lower address signal lines A0-AN-1, in a concentrate monitoring board, output from an arbitrary relay in an arbitrary distribution board can be obtained on a monitor signal line X1. When ON/OFF state of the monitor signal line X1 is read out on the concentrated monitoring board P, operating state of a designated breaker can be monitored. Consequently, respective distribution boards can be connected in parallel with reduced number of signal lines, wiring, extension and modification of the distribution board are facilitated, and multiple breakers can be monitored.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a breaker centralized monitoring device for centrally monitoring individual breakers in a plurality of distribution boards.

[Prior Art] In order to safely manage small factories, small buildings, etc. where a large number of distribution panels are scattered, it is effective to centrally monitor the usage status of the breakers in each distribution panel. That is, if a breaker trips somewhere, the location can be immediately identified, recovery can be easily made, and labor can be saved.

However, although up to the distribution board has been monitored in the past, there are very few examples of monitoring down to the individual breakers within the distribution board. This is because a system that centrally monitors each breaker in a distribution panel is expensive.

[Problem to be solved by the invention] The present invention has been made in view of the above points,
The purpose is to provide a breaker centralized monitoring device that centrally monitors individual breakers in a plurality of distribution panels at a low cost.

[Means for Solving the Problems] In order to solve the above problems, in the breaker centralized monitoring device of the present invention, as shown in the attached drawing, a plurality of upper address signal lines A, ~AM and lower address signal lines Address signal line A. ~AN
A central monitoring board P and a plurality of distribution boards M are connected in parallel via -, and a monitoring signal line A plurality of relays Q1 to Qm that respectively monitor the status, an address setting circuit DS that sets the upper address, and the upper address set in the address setting circuit DS and the address specified by the upper address signal lines A and ~AM. An address comparison circuit DT that compares the address comparison circuit DT and an address comparison circuit DT that compares the
When a match of addresses is detected, the lower address signal line A
. This system is characterized in that it is provided with a multiplexer MPX that outputs the outputs of the relays 0 and 0 designated by ~AN-1 to the monitoring signal line X1.

[Operation] Since the present invention is configured as described above, a different address is set for each distribution board M, and the distribution board M is connected from the central monitoring board P to the upper address signal lines AN to AM. , and further selects each breaker B in the distribution board M using the lower address signal lines Ao to Ato, and controls the operation of the selected circuit board B by relays Q, ~Qs+ and multiplexer MPX.
By transmitting the signal to the monitoring signal line X, a large number of breakers B can be centrally monitored. Moreover, by connecting the central monitoring board P and each distribution board M in parallel, wiring work for signal lines can be simplified, and additions and changes can be easily performed. In addition, it is possible to determine in which area the work is being performed based on the usage status of breaker B, which can save labor in managing the entire building.

[Examples] Examples of the present invention will be described below. FIG. 1 shows the internal configuration of the distribution board M. Inside the distribution board M, as shown in FIG. 1, a plurality of breakers B are built-in. The output voltage of each breaker B is input to a detection circuit. As shown in FIG. 2, the control line LL connected to the detection circuit is connected to a plurality of distribution boards M, , M2 . ...,
Mn and the central monitoring panel P are connected in parallel.

The central monitoring board P is composed of a personal computer or the like, and includes an input/output circuit E connected to a control line LL.

FIG. 3 shows the configuration of the detection circuit in the distribution board M.

Relays Q1 to QII+ for monitoring the voltage on the output side of each breaker B are built into the detection circuit. Each of the relays Q, ~Qm outputs an ON state if the respective input voltage is at a predetermined level or higher, and an OFF state if the input voltage is below a predetermined level. The output of each relay Q, ~Q+= is input to a multiplexer MPX. Here, the relays Q to Q- are AC/DC output type relays, and may be electromechanical relays or semiconductor relays.

FIG. 4 shows the configuration of an optically coupled semiconductor type AC relay that has recently become popular. A voltage Vin on the output side of the breaker B is applied via a resistor R to an AC input terminal of the diode bridge DB. A light emitting element of a photocoupler PC is connected to the DC output end of the diode bridge DB. The output voltage obtained by the light-receiving element of the photocoupler PC is input to a voltage comparator CMP, and if it is above a predetermined level, the output of the voltage comparator CMP is turned on, and if it is less than a predetermined level, it is turned off.

As shown in FIG. 3, the outputs of the plurality of relays Q, -Qn are input to a multiplexer MPX, and an address match signal X is output. is active, the lower address signal line A. ~
Depending on the lower address specified by A H-1, either one
The outputs of the two relays are output to the supervisory signal line X1. When the address match signal is not active, the supervisory signal line
In contrast, multiplexer MPX is in a high impedance state.

On the other hand, the upper address specified by the upper address signal lines A and ~AM is input to the address comparison circuit DT and compared with the upper address set by the address setting circuit DS. When the addresses match, an address match signal is sent. X0 becomes active. The address setting circuit DS is composed of a digital switch or an EEFROM, and a different upper address is set for each distribution board M. Therefore, in the centralized monitoring panel P, the upper address signal lines AN to AM
Specify the distribution board M by
.about.Q- by the lower address signal lines A0 to AH-1, the output of any relay of any distribution board M can be obtained on the supervisory signal line X1. This monitoring signal line
10 FF By reading the F status on the centralized monitoring panel P, the operating status of the designated breaker can be monitored. Here, if the total number of upper address signal lines and lower address signal lines is, for example, 12, then 2+2=4096 breakers can be centrally monitored. Moreover, since the centralized monitoring panel P can be configured at low cost using a commercially available personal computer, it is possible to centrally monitor the operating status of a large number of breakers using an inexpensive system. In addition, since each distribution board M is connected in parallel, expansion and wiring changes can be easily accommodated.

FIG. 5 shows the configuration of the input/output circuit E of the centralized monitoring panel P. This centralized monitoring panel P has a control bus L1, an address bus L2, and a data bus of a personal computer,
, driver DR, buffer BF and control circuit CC
It is constructed by connecting input/output circuits E including the following. Driver DR is isolated between input and output, and data bus L3
From address signal line A. ~ Send address signal to AM. Buffer BF is also connected between input and output, and takes in a monitoring signal from monitoring signal line X to data bus 3. These driver DR and buffer BF are connected to address signal line A due to wiring error or malfunction. - This is provided to protect other circuits connected to the data bus L3 of the personal computer from being destroyed even if the AM or supervisory signal line X1 is short-circuited.

Note that the control circuit CC generates a chip select signal for activating the driver DR and buffer BF.

[Effects of the Invention] In the breaker centralized monitoring device of the present invention, as described above, the upper address signal line selects the distribution board, and the lower address signal line selects the individual breakers in the distribution board. Since the selected breaker operation is configured to be transmitted to the monitoring signal line via a relay and multiplexer, each distribution board can be connected in parallel with fewer signal lines, making it easier to wire and expand distribution boards. This has the effect of being able to monitor a large number of breakers while being easy to change.

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram showing the internal configuration of a distribution board used in an embodiment of the present invention, FIG. 2 is a block circuit diagram showing the overall configuration of the same, and FIG. FIG. 4 is a circuit diagram of a relay used in the above, and FIG. 5 is a block circuit diagram of a central monitoring board used in the same. A0 to A N-1 are lower address signal lines, AN to AM are upper address signal lines, B is a breaker, DS is an address setting circuit, D
T is address comparison circuit, M is distribution board, P is central monitoring board, Q,
~Qm is a relay, MPX is a multiplexer, and X is a monitoring signal line. Figure 1 M (distribution board)

Claims (1)

[Claims] (1) A central monitoring board and multiple distribution boards are connected in parallel via multiple upper address signal lines, lower address signal lines, and monitoring signal lines, and each distribution board is connected to multiple breakers and , a plurality of relays that monitor the on/off status of each breaker, an address setting means for setting an upper address, and a comparison between the upper address set in the address setting means and the address specified by the upper address signal line. and a multiplexer that outputs the output of the relay designated by the lower address signal line to the monitoring signal line when a match of addresses is detected by the address comparison means. Device.