JP3587392B2 - Residential distribution monitoring device - Google Patents

Description

【００１６】
この表１から判るように、単相三線式配電線Ｐ上の何処かに停電事故が発生すると、電源側停電検出装置１の表示ランプＬ_１ 及び負荷側停電検出装置２の表示ランプＬ_２ は、共に点灯することにより回路の停電事故を表示する。また電源側停電時（Ｂ），過電流事故発生時（Ｃ）及び漏電事故または欠相事故発生時（Ｄ）の何れの場合でも、負荷側（住居側）停電検出装置２の表示ランプＬ_２ が点灯することにより、回路に事故が発生していることを表示するのである。
【００１７】
【発明の効果】
本発明は前記のように、単相三線式配電線上に設置されている過電流保護機能付き漏電遮断器に対して、その過電流保護機能付き漏電遮断器の一次側には、停電事故発生時にのみ点灯する第１の表示ランプを備えた電源側停電検出装置と、漏電事故又は欠相事故発生時にのみ単相三線式配電線から通電されて点灯する第３の表示ランプと、過電流事故発生時にのみ単相三線式配電線から通電されて点灯する第４の表示ランプとを設置するとともに、その過電流保護機能付き漏電遮断器の二次側には、通電時にのみ消灯する第２の表示ランプを備えた負荷側停電検出装置を設置したから、停電事故が過電流保護機能付き漏電遮断器の一次側で発生したものか、また二次側で発生したものかを、第１の表示ランプの状態によりその原因箇所を即座に判別できる効果がある。
【００１８】
特に、同発明では、停電事故のうち漏電事故又は欠相事故発生時によるトリップ動作に起因したものの場合には、第３の表示ランプが点灯し、過電流事故発生時によるトリップ動作に起因したものの場合には、第４の表示ランプが点灯するので、停電事故の原因が判別できる効果がある。
【図面の簡単な説明】
【図１】本発明に係る住居用配電監視装置の一実施例を示す電気回路図であって、通常の正常待機状態を示す電気回路図。
【図２】同上の電源側停電時状態を示す電気回路図。
【図３】同上の電源側停電検出装置内部の電気回路図。
【図４】分電盤の内部回路構成図。
【符号の説明】
１ 電源側停電検出装置
２ 負荷側（住居側）停電検出装置
Ｐ 単相三線式配電線
Ｎ 過電流保護機能付き漏電遮断器
ｎ 漏電検出機構
ｎ′ 過電流検出機構
イ，イ′ 接点
Ｘ_１ ，Ｘ_２ ，Ｘ_３ リレー
Ｌ_１ ，Ｌ_２ ，Ｌ_３ ，Ｌ_４ 表示ランプ[0001]
[Industrial applications]
The present invention relates to a residential power distribution monitoring device having functions such as a power failure display, an overcurrent display, and a leakage identification display.
[0002]
[Prior art]
FIG. 4 shows a plurality of circuit breakers B, B, B─ from an outdoor single-phase three-wire distribution line P through a main switchboard M (including a device such as an earth leakage breaker N with an overcurrent protection function). , B ′, B ′, B ′}, a distribution board H that distributes power to each room in the house. The distribution board H constitutes a part of the residential power distribution monitoring device. In the conventional residential power distribution monitoring device, both the power failure detection device on the power supply side and the power failure detection device on the load side (residential side) are used. The single-phase three-wire distribution line P is installed on the secondary side of the earth leakage breaker N with an overcurrent protection function built in the main switchboard M.
[0003]
[Problems to be solved by the invention]
However, in the above-mentioned conventional power distribution monitoring device for residential use, the power failure detection device on the power supply side is installed on the secondary side of the single-phase three-wire distribution line P, similarly to the power failure detection device on the load side (residential side). If, for example, a trip operation occurs anywhere on the single-phase three-wire distribution line P, a power failure detection device on the load side (residential side) operates due to the trip operation, and a power failure accident is displayed. However, the power failure detection device on the power supply side also operates at the same time to indicate a power failure, so this power failure occurs on the power supply side in the main switchboard M or on the load side (residential side). In other words, there is a problem that it is not possible to determine whether the failure has occurred on the primary side or the secondary side of the earth leakage breaker N with an overcurrent protection function.
[0004]
The present invention has been made in view of the above-described problems, and when, for example, a trip operation occurs anywhere on a single-phase three-wire distribution line, a power failure caused by the trip operation is caused by a primary circuit breaker with an overcurrent protection function. Whether the problem occurred on the side or on the secondary side, the cause of the problem can be immediately identified by turning on the display lamp, and the power failure is immediately performed not only by specialist maintenance managers but also by electricians. The purpose is to be able to engage in recovery work of the accident.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a residential power distribution monitoring device according to the present invention is provided with an overcurrent protection function-equipped earth leakage breaker installed on a single-phase three-wire distribution line. The primary side has a power-supply-side power failure detection device provided with a _first indicator lamp (L ₁ ) that is lit only when a power failure occurs, and power is supplied from a single-phase three-wire distribution line only when a leakage fault or open-phase fault occurs. and turned Te third display lamp (L _3), we established a fourth indicator lamp that lights are energized from a single-phase three-wire distribution line only when an overcurrent accident (L _4), the overcurrent On the secondary side of the earth leakage breaker with a protection function, a load side (house side) power failure detection device provided with a _second display lamp (L ₂ ) which is turned off only when power is supplied is installed. .
[0007]
[Action]
Next, the operation of the residential power distribution monitoring device according to the present invention will be described. When power failure somewhere single-phase three-wire distribution line is generated, the second display lamps of the first display lamps and the load-side power failure detection device of the power supply-side power failure detection device, power outages of a circuit by lighting both Is displayed .
[0008]
In addition, a third indicator lamp that is energized and lit from the single-phase three-wire distribution line only when an electric leakage accident or an open-phase accident occurs, and a fourth indicator lamp that is energized and lit from the single-phase three-wire distribution line only when an overcurrent accident occurs. The second and third display lamps are turned on when a leakage fault or an open-phase fault occurs, and the second and third display lamps are turned on when a fault occurs. By turning on the fourth display lamp, the fact that an accident has occurred in the circuit is displayed.
[0009]
【Example】
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is an electric circuit diagram showing an embodiment of a residential power distribution monitoring device according to the present invention, and is an electric circuit diagram showing a normal normal standby state, and FIG. FIG.
[0010]
N in the figure is a leakage breaker with an overcurrent protection function installed on the single-phase three-wire distribution line P. Inside, the leakage detection mechanism n and the overcurrent detection mechanism n of the single-phase three-wire distribution line P are provided. And a contact A which is closed when the leakage detection mechanism n 'detects an overcurrent, and a contact A' which is opened when the overcurrent detection mechanism n 'detects an overcurrent. In the single-phase three-wire system distribution line P, the power-supply-side power failure detection device 1 is installed on the primary side (power supply side) of the earth leakage breaker N with overcurrent protection function, and the secondary of the earth leakage breaker N with overcurrent protection function is installed. On the side (load side), the load side (residential side) power failure detection device 2 is installed. The power supply side power failure detector 1 with has a power failure indicator lamp L _1, the load side (the residential side) power failure detection device 2 is provided with a power failure display lamp L _2.
[0011]
First, FIG. 1 which is an electric circuit diagram showing a normal normal standby state will be described. X ₁ is a inserted relay across the power supply-side failure detection device 1, the contact x _{1 (break} contact) to open and close by the operation of the relay X ₁ has one end of the power supply of single-phase three-wire distribution line P It is connected between the normally open side of the contact A that is closed by the leakage detection of the leakage detection mechanism n. X ₂ is a inserted relay between the one end and the neutral line of the single-phase three-wire power line distribution line P, contacts x ₂ for opening and closing by the operation of the relay X _{2 (make} contact) the relay contact x ₃ of X ₃ and _(break contact) and the lamp L ₄ are inserted in series, the series circuit through the contact x ₁ for opening and closing by the operation of the relay X _{1 (break} contact), single-phase three-wire It is inserted between one end of the power supply of the distribution line P and the neutral wire. Display lamp L _3, the contact x _{3 '(the} contact point x ₃ of the relay X ₃ other contacts) (make contact) is connected in series with a, this series circuit is also opened and closed by the operation of the relay X ₁ It is inserted in series between one end and the neutral line of the power supply of single-phase three-wire distribution line P via the contact x ₁ to.
[0012]
Next, FIG. 2 which is an electric circuit diagram showing a state at the time of a power-side power outage will be described. The contact x ₁ ′ ( open ), the contact x ₂ ′ ( closed ), the contact x ₃ ′ ( closed ) and the contact x ₃₁ ′ ( open ) in FIG. 2 correspond to the contact x ₁ , the contact x ₂ , and the contact x _{3 in FIG.} And the contact x ₃ ′, respectively, but the other circuit elements in the circuit are the same as those in FIG. In FIGS. 1 and 2, F is a power fuse.
[0013]
Next, Table 1 shows the operation state of the present invention. Table 1 shows that the residential power distribution monitoring device according to the present invention operates, (A) shows a normal normal standby state, (B) shows a power supply side power failure, (C) shows an overcurrent accident occurrence, and (D) shows a state of (D). ) is a representation during leakage accident or open phase accident, respectively relay _X 1, coil energized state _{X 2} and the relay _{X 3,} the lighting state of the indicator lamp _{L 1,} L 2, _{L 3} and _{L 4} .
[0014]
FIG. 3 shows an electric circuit diagram inside the power failure detection device 1 on the power supply side. And energizing the internal circuit G and the coil J from the power source E of a single-phase three-wire distribution line P in the normal state, the contact k display lamp L ₁ from contacting the side a is lit by energization of the coil J Absent. However, since the power failure in the power source E side occurs energization of the coil F is interrupted, the contact k will be in contact with the side b is inverted, the power outages lit display lamp L ₁ by battery E It is displayed.
[0015]
[Table 1]

[0016]
As can be seen from Table 1, when the power failure somewhere on the single-phase three-wire distribution line P is generated, display lamp L ₂ of the display lamps L ₁ and the load-side power failure detecting apparatus 2 of the power supply-side power failure detector 1 Illuminate together to indicate a power outage accident in the circuit. Also supply side during a power failure (B), even if overcurrent accident (C) and earth leakage accident or open phase accident occurs in any of (D), the load side (residential side) power failure detection device 2 of the display lamp by L ₂ is turned, it is to indicate that an accident has occurred in the circuit.
[0017]
【The invention's effect】
The present invention, as described above, for an earth leakage breaker with an overcurrent protection function installed on a single-phase three-wire distribution line, on the primary side of the earth leakage circuit breaker with an overcurrent protection function, when a power failure occurs A power-supply-side power failure detection device equipped with a first indicator lamp that lights up only, a third indicator lamp that is turned on by being supplied with electricity from a single-phase three-wire type distribution line only when a leakage fault or open-phase fault occurs, and an overcurrent fault occurrence A fourth indicator lamp, which is lit only when power is supplied from a single-phase three-wire distribution line, is installed only when the power is turned on, and a secondary display that is turned off only when power is supplied is provided on the secondary side of the earth leakage breaker with an overcurrent protection function. Since a load-side power failure detection device equipped with a lamp has been installed, a first indicator lamp indicates whether the power failure has occurred on the primary side or on the secondary side of the earth leakage breaker with overcurrent protection function. The location of the cause depending on the state of the There is discrimination can effect.
[0018]
In particular, in the same invention, when the power failure accident is caused by a trip operation due to the occurrence of a ground leakage accident or a phase loss accident, the third indicator lamp is turned on, and the failure caused by the trip operation caused by the occurrence of an overcurrent accident. In this case, the fourth display lamp is turned on, so that the cause of the power failure can be determined.
[Brief description of the drawings]
FIG. 1 is an electric circuit diagram showing one embodiment of a residential power distribution monitoring device according to the present invention, and is an electric circuit diagram showing a normal normal standby state.
FIG. 2 is an electric circuit diagram showing a power-supply-side power outage state of the power supply system.
FIG. 3 is an electric circuit diagram showing the inside of the power failure detection device on the power supply side according to the first embodiment;
FIG. 4 is an internal circuit configuration diagram of a distribution board.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Power supply side power failure detection device 2 Load side (residential side) power failure detection device P Single-phase three-wire type distribution line N Leakage breaker with overcurrent protection function n Leakage detection mechanism n ′ Overcurrent detection mechanism A, A ′ Contact X ₁ , X _{2, X 3} relays _{L 1, L 2, L 3} , L 4 display lamp

Claims (1)

In contrast to the earth leakage breaker with overcurrent protection function installed on the single-phase three-wire type distribution line, the primary indicator on the primary side of the earth leakage circuit breaker with overcurrent protection function is lit only when a power failure occurs. Power-supply-side power failure detection device , a third indicator lamp that is energized and turned on from a single-phase three-wire distribution line only when a leakage fault or open-phase fault occurs, and a single-phase three-wire distribution line only when an overcurrent fault occurs And a fourth indicator lamp, which is turned on when energized from the power source, and has a second indicator lamp, which is turned off only when energized, on the secondary side of the earth leakage breaker with an overcurrent protection function. A power distribution monitoring device for a residence, wherein the device is installed .

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