JP2590683Y2 - Circuit monitoring unit - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric circuit monitoring unit for realizing multi-function.

[0002]

2. Description of the Related Art Conventionally, in a single-phase three-wire distribution board, a main breaker is arranged at the upper center, and a neutral line connected to a neutral line (N) of a main road opened and closed by the main breaker is used. A configuration in which a conductive bar is disposed in the center of the distribution board together with the other two lines (L ₁ , L ₂ ) of the conductive bar toward the lower side of the main breaker, and breakers of a branch circuit are disposed on both sides of the main path. Normal.

[0003]

However, in such a distribution board, even if an earth leakage breaker is installed as a main breaker and the earth leakage of the branch circuit can be detected, it is determined which of the branch circuits has the earth leakage. That was impossible.
In addition, since the L-phase and N-phase electric wires of the branch circuit were not located close to each other in the distribution board, measurement using a clamp meter or the like was impossible.

If the space inside the distribution board is increased, the wiring becomes complicated. However, it is possible to install the existing leakage detection device to detect the leakage of the branch circuit. Was impossible. For the same reason, current monitoring, voltage monitoring, power monitoring, and the like were impossible. The present invention has been made in view of the above problems, and an object of the present invention is to provide a 1P-type branch breaker provided on an existing distribution board with a function of monitoring a circuit. Is to provide an electric circuit monitoring unit that can be easily added.

Another object of the present invention is to provide an electric circuit monitoring unit which can easily add a leakage detection function to a 1P type branch breaker provided on an existing distribution board. .

[0006]

In order to achieve the above-mentioned object, the invention according to claim 1 has a branching width of 1P type.
And a casing having substantially the same dimensions as the width of the
Connect the power terminal and load terminal of the 1P type branch breaker
Protruding on a straight line to the load terminal of a 1P type branch breaker
The input connection terminal to be mounted and connected and the
Another input connection end where the other pole is connected via a wire conductor
And the load wire provided at the other end of the housing are connected
A two-pole load connection terminal and both input connection terminals arranged in the housing
Zero phase interposed in the line connecting the load and the load connection terminals
Signal to detect earth leakage from secondary output of current transformer and zero-phase current transformer
Leakage detection unit consisting of
Leakage detection table driven by at least signal processing circuit
And an indicator element .

[0007]

[0008]

According to the first aspect of the present invention , the width is reduced.
A housing having dimensions substantially the same as the width of the 1P-type branch breaker;
A power terminal of a 1P-type branch breaker is connected to one end of the housing.
A 1P-type branch shake that is projected on the straight line connecting to the load terminal
The input connection terminal attached to the load terminal of the
Other poles are provided in place on the body and connected via wire conductors
Another input connection terminal and a load
Two-pole load connection terminal to which electric wires are connected and arranged inside the housing
Line connecting both input connection terminals and both load connection terminals
From the zero-phase current transformer and the secondary output of the zero-phase current transformer
A leakage detection unit consisting of a signal processing circuit that detects leakage
And driven by at least a signal processing circuit on the housing surface
The input terminal is connected to the load terminal of the branch breaker.
Simply connect another wire such as a neutral wire to another input connection terminal, and connect the load side wire to the load connection terminal .
That is, leakage monitoring can be performed, and a leakage monitoring function can be added to a branch breaker of an existing distribution board . Ma
In addition, the width of the housing is almost the same as the width of the branch breaker.
Is on the straight line connecting the power terminal and load terminal of the branch breaker.
Since they are installed, all adjacent branch breakers are supervised by electric circuits.
A viewing unit can be attached.

[0009]

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments. Figure 1
FIG. 3 shows the leakage detection unit 10 of the present embodiment,
The illustrated leakage detection unit 10 has the input connection terminal 11 protruding from one end surface of a housing 12 formed to have a width substantially equal to the width of the branch breaker 5, and the input connection terminal 11 is connected to a load terminal of the branch breaker 5. only fastened is fitted to the sixth terminal screws 6a at serves to allow electrical connection and mechanically attached to the load terminals 6, leakage detection unit
Reference numeral 10 denotes a connection between the load terminal 6 of the branch breaker 5 and the power supply terminal 7.
It is arranged on a straight line.

On the upper surface of a step portion 12a formed on the other end of the housing 12 of the leakage detecting unit 10, electric wire insertion holes 9 of load connection terminals 9 and 9, which are quick connection terminals built in the housing 12, are provided.
a, 9a and an operation window 16a for a release button 16 for releasing the connection state, and one side of the upper surface of the housing 12 is connected to and disconnected from a conductive bar for neutral wire (N), so-called neutral. A wire insertion hole 11a 'of another input connection terminal 11', which is a quick connection terminal for connecting a wire from the switch SW, is opened, and a leakage detection indicator lamp L, a test button 18, and a reset button 19 are provided on the other side. It is exposed.

FIG. 4 shows the electric circuit of the leakage detection function block built in the leakage detection unit 10, the connection relation between the branch breaker 5, the main breaker 4, and the neutral switch SW, and the leakage detection function block flows at the time of leakage. A zero-phase current transformer ZCT for detecting an unbalanced current, a function of amplifying a secondary output of the zero-phase current transformer ZCT, performing signal processing, and lighting and holding the above-described leakage detection display lamp L; and a test button A function for generating a pseudo-leakage state at the time of the operation of 18 and checking whether or not the signal processing function operates normally;
Signal processing circuit unit 2 having the function of resetting by operation 9
It consists of 0. The zero-phase current transformer ZCT has a primary winding connected to a line 19 connected between the input connection terminal 11 ′ and one load connection terminal 9 and between the input connection terminal 11 and the other load connection terminal 9. It is composed of connected lines 19,
The signal processing circuit section 20 receives power from the lines 19 and 19.

Thus, according to the present embodiment, the leakage detecting unit 10 is added to the existing distribution board to the branch breaker 5 as shown in FIG. By simply connecting the electric wire from the branch circuit, the wiring connection of the branch circuit is completed, and the same function as that having the leakage detection function can be added to the branch breaker 5.

Although the leakage detecting unit 10 is constructed in the above embodiment, it may be a unit incorporating other electric circuit monitoring function blocks such as a voltage detecting function, a current detecting function, and a power detecting mechanism. Further, a so-called neutral switch SW for connecting to the neutral line (N) may be configured to have a function block built therein.

[0015]

The invention according to claim 1 has a width dimension of 1P type.
A housing having substantially the same size as the width of the branch breaker;
Power terminal and load terminal of 1P type branch breaker from one end
Projecting on a straight line connecting
The input connection terminal to be attached to the load terminal
And another pole connected to the other pole via a wire conductor
The power connection terminal is connected to the load wire provided at the other end of the housing.
A two-pole load connection terminal connected to the
Between the load connection terminal and both load connection terminals.
Leakage is detected from the zero-phase current transformer and the secondary output of the zero-phase current transformer.
Leakage detection unit consisting of a signal processing circuit
Leaks driven by at least the signal processing circuit section on the body surface
The input connection terminal is connected to the load terminal of the branch breaker, another neutral connection such as a neutral wire is connected to another input connection terminal, and the load side wire is connected to the load. Just connect to the terminal and monitor two poles,
The leakage monitoring can be performed, and the leakage monitoring function can be easily added to the branch breaker of the existing distribution board . The width of the housing is almost the same as the width of the branch breaker.
The housing is connected to the power terminal and load terminal of the branch breaker.
Are placed on a straight line connecting
If you can attach an electric circuit monitoring unit to all
There is also an effect.

[0016]

[Brief description of the drawings]

FIG. 1 is a top view showing a combined state of a branch breaker and a leakage detection unit according to an embodiment of the present invention.

FIG. 2 is a perspective view of the leakage detecting unit according to the embodiment of the present invention;

FIG. 3 is a perspective view showing a connection state of the branch breaker and the leakage detection unit according to one embodiment of the present invention;

FIG. 4 is an electric circuit diagram of one embodiment of the present invention.

[Explanation of symbols]

 5 Branch breaker 6 Load terminal 7 Power supply terminal 9 Load connection terminal 10 Leakage detection unit 11 Input connection terminal 11 'Input connection terminal L Leakage detection indicator lamp

Claims (1)

(57) [Scope of request for utility model registration] 1. The width dimension is substantially the same as the width of a 1P type branch breaker.
A case with one dimension and a 1P type branch from one end of the case
The breaker protrudes on a straight line connecting the power terminal and load terminal.
Attached to the load terminal of the 1P type branch breaker.
Input connection terminal and the other pole
Another input connection terminal connected via a conductor and the other
Two-pole load connection to which the load wires are connected at the end
Terminals, both input connection terminals and both load connections arranged inside the housing
Zero-phase current transformer and zero-phase interposed in the line connecting the terminal
A signal processing circuit that detects leakage from the secondary output of the current transformer
Short circuit detection unit and at least a signal
A leakage detection display element driven by the processing circuit section is provided.
Path monitoring unit, characterized in that the.