JP3910227B2 - Cubicle type power receiving equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cubicle type power receiving facility, and more particularly to a cubicle type power receiving facility having a structure capable of safely performing a meter reading operation and an inspection operation.
[0002]
[Prior art]
A conventional cubicle type power receiving facility will be described with reference to FIG.
[0003]
The cubicle housing 20 is for accommodating various power distribution facilities, and the overall shape thereof is a vertically long box shape. The front wall (front door 1) of the cubicle housing 20 is openable and closable, and various operations on the power distribution equipment accommodated therein are performed by opening the front door 1. In the upper region of the front door 1, a window 3 for performing meter reading of the internal device is provided. Of course, a transparent member such as glass (for example, glass) is fitted in the window 3 in order to prevent insects and the like from entering.
[0004]
Further, a lock 2 is provided on the front door 1 so as not to be opened carelessly.
[0005]
In the cubicle housing 20, the transformer 4 and the ground terminal 5 are installed in the lower part. The second type installation current measurement point 6 is set in the middle of the wiring connecting the two.
[0006]
In addition, a voltmeter 7, an ammeter 8, and a watt hour meter 19 are installed above the transformer 4 and the like. These are arranged at positions corresponding to the window 3 so that the instrument can be read from the window 3 without opening the front door 1.
[0007]
[Problems to be solved by the invention]
In the conventional cubicle type power receiving equipment, reading of the voltmeter 7 and the like can be performed through the window 3. However, in general, in cubicle-type high-voltage power receiving equipment, indicator meters such as a voltmeter and an ammeter and phase changeover switches for measuring each phase of voltage and current are arranged inside the cubicle. Therefore, in order to measure the voltage and current of each phase at the time of meter reading and inspection, it is necessary to open the front door 1 and operate the changeover switch. Also, when measuring the type 2 grounding current of the transformer, it was necessary to open the door to measure. Further, a switch for internal lighting of the cubicle housing 20 was also installed in the housing. When performing meter reading and inspection on a cubicle installed at night or in a dark place, the front door 1 must be opened and the internal illumination switch must be operated by hand.
[0008]
As described above, in the conventional cubicle type power receiving equipment, it is necessary to open the front door 1 in the meter reading and inspection work. Therefore, there was a high risk of touching the internal high-voltage charging part. Also, during work, there was a high risk of rain, snow, etc. entering the cubicle housing 7 and causing accidents such as short circuits and ground faults. There was a high risk of entering small animals such as cats and mice and insects.
[0009]
An object of the present invention is to provide a cubicle type power receiving facility that enables safe meter reading / inspection work.
[0010]
[Means for Solving the Problems]
The said subject is solved by implementing the following matters.
[0011]
(1) A sub-door is provided in the cubicle housing, and the operation tools and measurement points necessary for the meter reading work are gathered and arranged at positions corresponding to the sub-doors. Even if you don't open the main door, you can work just by opening the sub door.
[0012]
(2) When the door is open, this is notified by the notification means (for example, an alarm buzzer is sounded). In this case, if the power supply to the notification means is performed from the secondary side of the main cutoff device or the like, the notification is made only in the energized state. Therefore, the operator is effectively cautioned.
[0013]
(3) When the door is opened and the presence of a person is detected, a measuring instrument such as a voltmeter and an ammeter, and an illuminating lamp that illuminates the operation unit in the sub-door are turned on. Thereby, meter reading / inspection work can be performed even at night.
[0014]
(4) By using different keys for the main door and the sub door, it is possible to prevent the door from being accidentally opened.
[0015]
The configuration of the present invention will be described more specifically as follows.
[0016]
The present invention has been made to achieve the above object, and as a first aspect, a transformer, a ground wire of the transformer, an openable main door provided with a first opening, and the first A housing having an openable / closable sub-door installed in the opening of 1 and housing the transformer, and the ground wire is laid at a position corresponding to the sub-door in the housing. A cubicle-type power receiving facility is provided. In this way, the ground current can be measured by opening the sub door. Since there is no need to open the main door, safety during measurement is high.
[0017]
The main door or the sub-door is at least partially configured to be transparent, and a measuring instrument installed at a position corresponding to the sub-door in the enclosure for measuring the energization state of the transformer And an operation device installed at a position corresponding to the transparently configured portion in the housing for changing the setting of the measuring device. In this way, the measuring instrument can be read through the transparent portion without opening the door. In addition, the setting of the measuring instrument can be changed simply by opening the sub door.
[0018]
A first detection means for detecting the open / closed state of the sub-door, and when the first detection means detects that the sub-door is opened, it lights up and detects that the sub-door is closed. In this case, it is preferable to have an illuminator that is turned off. This is convenient because the illuminator is turned on just by opening the sub door.
[0019]
The second detection means for detecting the presence of a person in the vicinity of the housing and the light is turned on when the second detection means detects the presence of a person, and the light is turned off when the presence of the person cannot be detected. And an illuminator. This is convenient because there is no need to operate the illuminator.
[0020]
The main door and the sub-door preferably have locks with different keys. In this way, the main door will not be accidentally opened.
[0021]
As a second aspect of the present invention, there is provided a transformer, a casing having a door that can be opened and closed, a housing in which the transformer is stored, a third detection unit that detects an open / closed state of the door, and the detection unit. A cubicle type power receiving facility is provided, comprising: an informing means for notifying that the door is open. In this way, the operator can be alerted.
[0022]
The notification means is operated by electric power supplied from the secondary side of the main circuit breaker that cuts off the current to the transformer or the secondary side of the disconnector disposed on the primary side of the main circuit breaker. Preferably it is. In this way, not only whether or not the door is open, but also the presence or absence of energization at that time can be notified by the presence or absence of notification by the notification means. Therefore, the operator can be alerted and the safety during work can be enhanced.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0024]
A first embodiment of the present invention will be described with reference to FIGS.
[0025]
In this embodiment, the small door 9 is provided in the front door 1, and the window 3 is installed here.
[0026]
The cubicle housing 20 is for accommodating various power distribution facilities, and the overall shape thereof is a vertically long box shape. The front wall (front door 1) of the cubicle housing 20 is openable and closable, and various operations on the power distribution equipment accommodated therein are performed by opening the front door 1. A small door 9 having a window 3 is provided in the upper region of the front door 1. Of course, a transparent member such as glass is attached to the window 3 in order to prevent insects and the like from entering.
[0027]
A high voltage is applied to the transformer 4 and the like, which is dangerous. Therefore, the front door 1 is provided with a front door lock 2 so that the front door 1 is not opened carelessly. Similarly, the small door 9 is provided with a small door lock 10. By making these keys different, it is possible to prevent the meter reading operator from opening the front door 1 by mistake.
[0028]
A transformer 4 and a ground terminal 5 are installed in the lower part of the cubicle housing 20. The second type installation current measurement point 6 is set in the middle of the wiring connecting the two.
[0029]
Above the transformer 4, a voltmeter 7, an ammeter 8, a watt hour meter 19, and a measurement phase changeover switch 14 for an internal device are installed. These are arranged at positions corresponding to the small door 9 and the window 3. Therefore, the instrument can be read from the window 3 without opening the front door 1 and the small door 9 (see FIG. 2). Further, by opening the small door 9, the measurement phase of the internal voltmeter 7 and ammeter 8 can be switched. Since there is no need to open the front door 1, there is no danger of touching the charged part in the cubicle. Therefore, safety during meter reading work is higher.
[0030]
The “measuring instrument” referred to in the claims corresponds to the voltmeter 7 or the like in the present embodiment. The “operator” corresponds to the changeover switch 14 for changing the measurement phase. “Housing” corresponds to the cubicle housing 20. The “main door” corresponds to the front door 1. The “subdoor” corresponds to the small door 9. The “first opening” refers to an opening that is opened and closed by the small door 9. The “transparent portion” corresponds to the window 3.
[0031]
A second embodiment of the present invention will be described with reference to FIGS.
[0032]
In the first embodiment described above, the window 3 is installed in the small door 9. On the other hand, in the second embodiment, the small door 9 and the window 3 are separately provided. Further, by providing a door switch on the small door 9, the illumination lamp 16 ′ is turned on / off according to the opening / closing of the small door 9.
[0033]
As shown in FIG. 4, a voltage measurement phase changeover switch 12, a current measurement phase changeover switch 13, and a second type ground current measurement point 6 are arranged at a position corresponding to the small door 9 inside the cubicle housing 20.
[0034]
As a result, the small door 9 can be opened and the voltage and current measurement phases can be switched. Also, as shown in FIG. 4, the second type ground current can be measured by inserting the clamp meter C from the small door 9. There is no need to open the front door 1. Therefore, there is no risk of touching the charging unit and the transformer in the cubicle, and the meter reading operation can be performed safely.
[0035]
The illumination lamp 16 'is provided mainly to assist the operation of the voltage measurement phase changeover switch 12 and the like. The illumination lamp 16 'is turned on when the door switch 11 detects that the small door 9 has been opened. Conversely, when it is detected that the small door 9 is closed, the light is turned off.
[0036]
Arranging a voltmeter or the like at a position readable from the window 3 is the same as in the other embodiments.
[0037]
In the first and second embodiments described above, the window 3 and the small door 9 are arranged on the front door 1. However, these installation locations are not limited to the front door 1. These may be installed at any location in the cue building housing 20. However, from the viewpoint of workability such as meter reading, the window 3 is more preferably installed on the front door 1 or the small door 9. This is because, when a voltmeter or the like is provided on another wall surface, when the front door 1 and the small door 9 are opened, it may be difficult to read these measuring instruments. Similarly, the small door 9 is more preferably installed on the front door 1. This is because if the small door 9 is provided on another wall surface, it may be difficult to operate the measurement phase changeover switch when the front door 1 is opened.
[0038]
Moreover, in order to ensure safety, the small door 9 is preferably provided at a position away from the transformer to some extent. Moreover, the small door 9 does not need to be a hinged door, and may be a sliding door, a shutter, or the like.
[0039]
In addition, you may comprise the small door 9 and the front door 1 whole transparently. In this case, this corresponds to the entire door being a window.
[0040]
The window 3 corresponds to a “portion configured to be transparent” in the claims. The “operator” corresponds to the voltage measurement phase changeover switch 12 or the like. The “first detection means” corresponds to the door switch 11.
[0041]
A third embodiment of the present invention will be described with reference to FIG.
[0042]
The present embodiment is characterized in that a buzzer 18 that rings when the front door 1 is opened is provided. In addition, an internal illumination 16 that can be turned on / off without opening the front door 1 is provided.
[0043]
The open / closed state of the front door 1 is detected by a door switch 15 provided near the hinge of the front door 1. The power supply to the buzzer 18 is turned on / off according to the detection result of the door switch 15. Further, as shown in FIG. 6, the power required for the buzzer 18 is supplied from the load side of the main power circuit breaker. As a result, when the front door 1 is opened while the cubicle is energized, the buzzer 18 sounds. Therefore, when the operator opens the front door 1 by mistake, or unavoidably opening the front door 1 and performing a meter reading operation, the buzzer 18 sounds and the operator can be alerted. When the main power breaker is disconnected, the buzzer 18 does not ring. Therefore, when the inspection work inside the cubicle is performed, the energization state of the cubicle can be confirmed by the sound of the buzzer 18.
[0044]
Similar door switches and buzzers may be provided on doors other than the front door 1.
[0045]
The cubicle housing 20 is provided with an proximity sensor 17 for detecting the presence of a person in the vicinity of the cubicle housing 20. The illumination lamp 16 is turned on / off according to the detection result of the proximity sensor 17. As a result, the internal illumination lamp 16 is turned on / off only by the operator approaching / separating from the cubicle housing 20. Therefore, it is not necessary to open the front door 1 or the small door 9 in order to turn on / off the illumination lamp 16. FIG. 6 shows the door switch 11 in the second embodiment, not the proximity sensor 17 of the present embodiment.
[0046]
The proximity sensor 17 is not limited to being in the cubicle, but may be attached to the cubicle casing surface. For example, an infrared sensor or an ultrasonic sensor may be used as the proximity sensor 17. A touch sensor or the like may be used instead of the proximity sensor. In this case, if the touch sensor is attached to the outer surface of the cubicle housing, the illumination lamp 16 can be turned on / off without opening the door.
[0047]
The “notification means” referred to in the claims corresponds to the buzzer 18. The “third detection means” corresponds to the door switch 15 of the front door 1 in the present embodiment. The “second detection means” corresponds to the proximity sensor 17.
[0048]
【The invention's effect】
In the cubicle type power receiving equipment of the present invention, there is no danger of touching the charging part during meter reading / inspection work, and it is safe. Since the operator can be alerted by lighting, buzzer, etc., safety is high. Safety is high because misoperation can be prevented.
[Brief description of the drawings]
FIG. 1 is a front view of a cubicle type power receiving facility according to a first embodiment of the present invention.
FIG. 2 is a diagram showing an instrument part inside a cubicle that can be seen through a window 3;
FIG. 3 is a front view of a cubicle type power receiving facility according to a second embodiment of the present invention.
FIG. 4 is a diagram showing a state of a change-over switch that can be seen through a small door 9;
FIG. 5 is a front view of a cubicle type power receiving facility according to a third embodiment of the present invention.
FIG. 6 is a circuit diagram showing a power supply path to the buzzer 18 and the like.
FIG. 7 is a front view of a conventional cubicle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Front door, 2 ... Front door lock, 3 ... Window, 4 ... Transformer, 5 ... Grounding terminal,
6 ... Type 2 ground current measurement point, 7 ... Voltmeter,
8 ... Ammeter, 9 ... Small door, 10 ... Small door lock, 11 ... Door switch for small door,
12 ... Voltage measurement phase changeover switch, 13 ... Current measurement phase changeover switch,
14 ... changeover switch, 15 ... door switch for front door, 16 ... illuminating lamp,
17 ... proximity sensor, 18 ... buzzer, 19 ... watt hour meter, 20 ... cubicle housing,
21 ... Circuit breaker for wiring, 22 ... Transformer for electricity supply and demand instrument, 23 ... Disconnector, C ... Clamp meter

Claims (1)

A transformer, is stored for the ground wire of the transformer, the transformer having a installed reclosable Fukutobira the opening of the openable main doors and first provided with a first opening A cubicle-type power receiving facility having
The sub door is provided on the upper part of the main door,
The main door or the sub door has a transparent window,
Inside the transparent window, a voltmeter, an ammeter, and a wattmeter are arranged,
The ground wire is laid at a position corresponding to the sub door in the housing, and further, a second type current measurement location is arranged,
In the position corresponding to the sub door, a voltage measurement phase changeover switch and a current measurement phase changeover switch are further arranged,
First detecting means for detecting the open / closed state of the sub door;
A first illuminator that turns on when the first detection means detects that the sub-door is opened, and turns off when it detects that the sub-door is closed;
Second detection means for detecting the presence of a human in the vicinity of the housing;
A second illuminator that turns on when the second detection means detects the presence of a person, and turns off when the presence of the person cannot be detected;
Third detection means for detecting the open / closed state of the main door;
A cubicle type power receiving facility, comprising: a notification means for notifying that the third detection means detects that the main door is open.

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