JP6216942B2 - Plug-in breaker connection phase display mechanism - Google Patents

Description

  The present invention relates to a connection phase display mechanism of a plug-in breaker.

  In a plug-in breaker that can change the connection phase of the plug by rotating the plug on the power supply side, as a technique for grasping the connection phase of the plug in the plugged-in state, a plug fixing member that holds one plug and A technique (Patent Document 1) is disclosed in which a voltage display member that is engaged and oscillated is provided near the upper surface of a case.

  However, the technique of Patent Document 1 is a single-phase three-wire breaker that detects only the upper plug position of two plugs and identifies only 100V and 200V. In particular, in the case of a three-phase three-wire breaker, any combination of “R phase-S phase”, “S phase-T phase”, “R phase-T phase”, or in a single-phase three-wire breaker, Any one of the combinations of “L1 phase-N phase”, “L2 phase-N phase”, and “L1 phase-L2 phase”) cannot be identified, which is inconvenient. Moreover, the voltage imbalance as the whole distribution board cannot be grasped.

Japanese Patent No. 4118100

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problem, and in a plug-in breaker capable of changing the plug connection phase by changing the position of the plug on the power supply side, the plug connection phase is specifically set in the plug-in state. It is to provide a technology that enables identification.

  The connection phase display mechanism of the plug-in breaker of the present invention, which has been made to solve the above problem, can change the connection phase with the bus bar stacked in three stages by changing the position of the plug terminal fitting. A plug-in breaker connection phase display mechanism, wherein when the plug terminal fitting is disposed at a position where it is connected to any two bus bars of the three stacked bus bars, A position detection means for detecting the presence of the plug terminal fitting at the position, a determination unit for receiving a detection result by the position detection means as an electrical signal, and determining a connection phase of the plug-in breaker according to a combination pattern of the signals; A display means for electrically displaying the determination result of the determination unit is provided.

  According to a second aspect of the present invention, in the connection phase display mechanism for the plug-in breaker according to the first aspect, the display means is provided outside the housing of the plug-in breaker.

  The invention according to claim 3 is the connection phase display mechanism of the plug-in breaker according to claim 1 or 2, wherein the connection phase display mechanism of the plug-in breaker includes current detection means for detecting a current flowing through the plug-in breaker; Provided with a changeover switch that can switch the display target of the display means to the detection result of the current detection means, and displays either the determination result of the determination unit or the detection result of the current detection means on the display means It is characterized by this.

  According to a fourth aspect of the present invention, in the connection phase display mechanism of the plug-in breaker according to the first or second aspect, the connection phase display mechanism of the plug-in breaker includes current detection means for detecting a current flowing through the plug-in breaker. The determination unit displays the determination result of the determination unit and the detection result of the current detection unit.

  According to a fifth aspect of the present invention, in the connection phase display mechanism for the plug-in breaker according to the fourth aspect, the determination unit refers to a current for each bus bar in the distribution board in which the plug-in breaker is accommodated. In the distribution board, when the current unbalance rate is greater than or equal to a predetermined value, it also has a function of determining the necessity of phase switching, and the display means also displays the result of necessity determination of the phase switching. It is characterized by making it.

  According to a sixth aspect of the present invention, in the plug-in breaker connection phase display mechanism according to the fourth aspect, the determination unit also has a function of determining a blocking factor of the plug-in breaker including the determination unit, and the display means Is characterized by displaying a blocking factor of the plug-in breaker.

As in the present invention, in the connection phase display mechanism of the plug-in breaker capable of changing the connection phase with the bus bar stacked in three stages by changing the position of the plug terminal metal fitting, the plug terminal metal fitting is A position detecting means for detecting the presence of a plug terminal fitting at each position when arranged at a position connected to any two of the bus bars stacked in the three stages; and the position A detection unit that receives a detection result by the detection unit as an electrical signal and determines a connection phase of the plug-in breaker based on a combination pattern of the signal, and a display unit that electrically displays the determination result of the determination unit By
When connected to the bus bar, not only the voltage but also the connection phase of the plug-in breaker can be specifically identified.

It is a whole perspective view of a plug-in breaker. It is a whole perspective view in the state where a part of cover of a plug-in breaker was removed. It is principal part sectional drawing of the plug-in breaker of this embodiment. It is a principal part front view of the plug-in breaker of this embodiment. It is principal part sectional drawing of the plug-in breaker in other embodiment. It is a side view of the state which has arranged the plug-in breaker in other embodiments in a distribution board. It is a top view of the state which has arranged the plug-in breaker in other embodiments in a distribution board. It is a top view of the state which has arranged the plug-in breaker in other embodiments in a distribution board. It is explanatory drawing of the attachment structure of a plug-in breaker.

  Preferred embodiments of the present invention are shown below.

As shown in FIGS. 1 and 2, plug terminal fittings 2 and 3 are provided in two upper and lower stages inside a housing 1 of a plug-in breaker incorporating a connection phase display mechanism of the present invention.
By rotating these plug terminal fittings 2, 3, the connection phase with the bus bar stacked in three upper and lower stages is changed to “R phase-S phase”, “S phase” in the three-phase three-wire distribution board. -T-phase "," R-phase-T-phase ", any combination of" L1-phase-N-phase "," L2-phase-N-phase "," L1-phase- " It can be changed to any one of the combinations of “L2 phase”.

As shown in FIG. 2, the plug terminal fittings 2 and 3 are shaped such that a metal piece can be bent into a substantially U shape as shown and connected to a bus bar.
Each of the plug terminal fittings 2 and 3 is fixed to one surface (upper or lower surface) of an insulating plug fixing member 4 made of plastic.
The plug fixing member 4 has a U-shaped cross section, and can be rotated by supporting shaft portions provided on both sides by a bearing portion formed on the housing 1, and an operation portion for performing this rotation operation. 5 is formed.

To rotate the plug terminal fittings 2 and 3, the front cover of the housing 1 is opened, the plug terminal fittings 2 and 3 and the plug fixing member 4 are exposed, and then a tool is inserted into the operation portion 5 of the plug fixing member 4. Done.
In addition, the vertical movement of the plug terminal fittings 2 and 3 can be made by sliding instead of rotating.

As shown in FIG. 3 and FIG. 4, when the plug-in breaker housing 1 is disposed at a position where it is connected to the upper and lower two-stage bus bars among the upper and lower three-stage bus bars, At each position, microswitches 6 and 7 are arranged as position detecting means for detecting the presence of the plug terminal fitting.
The micro switch 6 is pressed on the back surface of the plug terminal fitting 2 when the upper plug terminal fitting 2 is disposed at a position where it is connected to the upper bus bar among the three upper and lower bus bars. Thus, it is detected that the plug terminal fitting 2 is in a position to be connected to the upper bus bar among the bus bars stacked in the upper and lower three stages.
The micro switch 7 is pressed by the back surface of the plug terminal fitting 2 when the lower plug terminal fitting 3 is arranged at a position where it is connected to the lower bus bar among the three upper and lower bus bars. Then, it is detected that the plug terminal fitting 3 is in a position where it is connected to the lower bus bar among the bus bars stacked in the upper and lower three stages.

  The pressing information of the micro switches 6 and 7 is transmitted to the determination unit 9 through the lead wire 8 as an electrical signal. In the present embodiment, as shown in FIG. 3, the determination unit 9 and the display unit 10 are provided inside the housing 1 of the plug-in breaker, but as shown in FIG. 5, the determination unit 9 and the display unit 10 are provided. It can also be provided outside the housing 1 of the plug-in breaker.

The determination unit 9 receives the press information of the micro switches 6 and 7 as an electrical signal, and determines the connection phase of the plug-in breaker based on the combination pattern of the signals.
For example, when the bus bars stacked in the upper and lower three stages are N phase, L1 phase, and L2 phase in order from the top, “100 V by L1 phase-N phase”, “L2 phase-N "100V by phase" and "200V by L1 phase-L2 phase" are determined.
(Case 1): When “the micro switch 6 is ON and the micro switch 7 is also ON”, “the plug terminal fitting 2 is arranged at a position to be connected to the upper bus bar (N phase), and the plug terminal fitting 3 is the lower Since it is arranged at a position where it is connected to the bus bar (L2 phase), it is determined to be 100 V by “L2 phase-N phase”.
(Case 2): When “the micro switch 6 is ON and the micro switch 7 is OFF”, “the plug terminal fitting 2 is arranged at a position to be connected to the upper bus bar (N phase), and the plug terminal fitting 3 is the lower It is not arranged at a position where it is connected to the bus bar (L2 phase) (= is arranged at a position where it is connected to the middle bus bar (L1 phase)). Determined.
(Case 3): When “micro switch 6 is OFF and micro switch 7 is ON”, “plug terminal fitting 2 is not disposed at a position where it is connected to the upper bus bar (N phase) (= middle bus bar) The plug terminal fitting 3 is disposed at a position to be connected to the lower bus bar (L2 phase) ”, so that it is 200 V at“ L1 phase−L2 phase ”. It is determined that there is.

  The determination result by the determination unit 9 is transmitted to the display means 10 as an electrical signal. In the present embodiment, the determination unit 9 transmits the determination result to the LED used as the display unit 10 as a coloring instruction, and the connected phase can be identified by the coloring of the LED.

  In this embodiment, as shown in FIG. 3, the display means 10 is provided on the upper part of the housing 1 of the plug-in breaker. However, as shown in FIGS. 6 and 7, the display means 10 is connected to the plug-in breaker. It can also be provided outside the housing 1. In addition, a monitor (such as a PC) installed at a remote location and connected by a communication line can be used as the display means 10.

  In addition, as shown in FIGS. 5 and 8, the LED used as the display means 10 can be provided on the display substrate 11 outside the breaker.

In the embodiment shown in FIG. 5, as shown in FIGS. 5 and 8, an LED and a determination unit 9 corresponding to each LED are provided on the display substrate 11 outside the breaker. The display substrate 11 may also serve as a bus bar protection portion rate.
The LEDs are arranged so as to be exposed on the panel surface of the distribution board. The power of the determination unit 9 and the LED is supplied from the bus bar.
Further, as shown in FIG. 9, the breaker mounting substrate 12 is provided with a lead wire connecting device 13, and the lead wire connecting device 13 is mounted in conjunction with the vertical movement of the breaker mounting tool 14 for physically fixing the breaker. Connection and disconnection are made on the substrate 12.

(Other embodiment 1)
As shown in FIG. 5, the current detection means 15 (CT) which detects the electric current which flows into a plug-in breaker can also be provided in the inside of the housing 1 of a plug-in breaker. The connection phase display mechanism is provided with a changeover switch 17 to switch the display of the connection phase of the plug-in breaker and display the CT measurement values on the display means 10 by, for example, color coding in the following four stages. it can.
<Rated 100%> ... Red <Rated 80%> ... Orange <Rated 70%> ... Green <Rated 60% or less> ... Blue This makes it possible to use current for each breaker as required Can be grasped by the display means 10.

(Other embodiment 2)
By displaying the display of both the connection phase and the used current at the same time as the monitoring monitor connected by the communication line, the display means 10 can be confirmed from a remote location. When an unbalance of a 100V load is detected by simultaneously monitoring the connection phase and the current used, it is possible to identify a circuit that recommends phase switching.
For example, when the phase current difference is 30% or more, it is determined that the phase is unbalanced, and a branch breaker having a high use current for each phase for a predetermined time or a branch breaker having a low use current for each phase for a predetermined time is specified. The identified branch breaker can be displayed on the PC screen. In this case, it is assumed that a current detection means 16 (CT) for measuring a current for each bus is provided.
When the display means 10 is an LED installed in the vicinity of the breaker, the LED of the specified branch breaker can be blinked.

(Other embodiment 3)
The leakage detector is provided inside the plug-in breaker housing 1, and the determination unit 9 has a function of determining a plug-in breaker interruption factor, and the determination result is displayed in, for example, the following three colors. It can be displayed on the means 10.
<Trip due to overcurrent> ・ ・ Blue flashing <Trip due to electric leakage> ・ ・ ・ Red flashing <Others> ・ ・ ・ ・ ・ ・ ・ ・ Green flashing

DESCRIPTION OF SYMBOLS 1 Housing 2, 3 Plug terminal metal fitting 4 Plug fixing member 5 Operation part 6, 7 Micro switch 8 Lead wire 9 Judgment part 10 Display means (LED)
DESCRIPTION OF SYMBOLS 11 Display board 12 Mounting board 13 Lead wire connection apparatus 14 Breaker fixture 15 Current detection means 16 Current detection means 17 Changeover switch

Claims (6)

A plug-in breaker connection phase display mechanism capable of changing the connection phase with the bus bar stacked in three stages by changing the position of the plug terminal fitting,
Of the bus bar, the plug terminal fitting is stacked in the three stages,
Position detection means for detecting the presence of the plug terminal fitting at each position when arranged at a position to be connected to any two-stage bus bar;
Receiving the detection result by the position detection means as an electrical signal;
A determination unit that determines the connection phase of the plug-in breaker according to the combination pattern of the signals,
A connection phase display mechanism for a plug-in breaker, comprising: a display unit that electrically displays a determination result of the determination unit. The display means;
The connection phase display mechanism of the plug-in breaker according to claim 1, wherein the connection phase display mechanism is provided outside the casing of the plug-in breaker. The connection phase display mechanism of the plug-in breaker is
Current detecting means for detecting a current flowing through the plug-in breaker;
A changeover switch that enables the display object of the display means to be switched to the detection result of the current detection means;
In the display means,
The connection phase display mechanism of the plug-in breaker according to claim 1, wherein either the determination result of the determination unit or the detection result of the current detection unit is displayed. The connection phase display mechanism of the plug-in breaker is
Current detection means for detecting the current flowing through the plug-in breaker;
The connected phase display mechanism for a plug-in breaker according to claim 1 or 2, wherein the display unit displays the determination result of the determination unit and the detection result of the current detection unit. The determination unit
In the distribution board containing the plug-in breaker, refer to the current for each bus bar,
If the current unbalance rate is higher than the specified value in the distribution board,
It also has a function to determine whether or not to switch phases,
The connected phase display mechanism for a plug-in breaker according to claim 4, wherein the display means also displays a result of determining whether or not to perform the phase switching. The determination unit
It also has a function of determining a blocking factor of the plug-in breaker provided with the determination unit,
5. The plug-in breaker connection phase display mechanism according to claim 4, wherein the display means also displays a blocking factor of the plug-in breaker.