JP5178812B2 - Electrical equipment renewal construction method - Google Patents

Electrical equipment renewal construction method Download PDF

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JP5178812B2
JP5178812B2 JP2010278666A JP2010278666A JP5178812B2 JP 5178812 B2 JP5178812 B2 JP 5178812B2 JP 2010278666 A JP2010278666 A JP 2010278666A JP 2010278666 A JP2010278666 A JP 2010278666A JP 5178812 B2 JP5178812 B2 JP 5178812B2
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foundation
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electrical equipment
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JP2012127095A (en
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健一 小林
利紀 角田
修治 杉本
克二 長江
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Chugoku Electric Power Co Inc
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Description

本発明は電気機器の更新工事方法に関し、特に遮断器や断路器等、屋外で架台上にその本体を載置して設置する電気機器の更新工事を行う場合に適用して有用なものである。   The present invention relates to a method for renewing electrical equipment, and is particularly useful when applied to renewing electrical equipment such as a circuit breaker or a disconnecting device that is installed outdoors on a gantry. .

屋外で架台上にその本体を載置して設置する電気機器としてタンク型遮断器を挙げることができる。図５は更新が予定されている既存のタンク型遮断器を概念的に示す説明図である。同図に示すように、タンク型遮断器Ｉは三相の各相に対応させて設けられた遮断部２Ａ，２Ｂ，２Ｃ、ブッシング３Ａ，３Ｂ，３Ｃおよび操作箱４等からなる本体１の部分を架台５に載置することで地面６に据え付けられている。ここで、架台５はその脚部５Ａが、地面６に形成されたコンクリートの基礎７上に載置されアンカーボルト（図示せず）等の締結部材を介して固定されている。   A tank type circuit breaker can be cited as an electrical device that is installed on a gantry with its main body placed outdoors. FIG. 5 is an explanatory view conceptually showing an existing tank type circuit breaker scheduled to be updated. As shown in the figure, the tank-type circuit breaker I is a part of the main body 1 composed of breakers 2A, 2B, 2C, bushings 3A, 3B, 3C, an operation box 4 and the like provided corresponding to each of the three phases. Is placed on the ground 6 by placing it on the gantry 5. Here, the leg 5A of the gantry 5 is placed on a concrete foundation 7 formed on the ground 6 and fixed through fastening members such as anchor bolts (not shown).

従来技術において、上述の如きタンク型遮断器の更新においては、同一場所に設置する場合が殆どである。この場合に機器の基礎設計により既設の基礎７が使用できない場合は、基礎７の改造やこれに伴う基礎掘削等の工事が必要になる。従来、かかる基礎工事に際しては既設機器を撤去した後、既設基礎の改造工事ないし新規基礎の工事を行っていた。かかる基礎工事は一月程度の長期に亘るためその間の電力供給を別途確保する必要がある。そこで、電力供給を移動機器等を利用することで別途用意し、移動機器で電力を供給しつつ所定の基礎工事を行っている。   In the prior art, in the renewal of the tank type circuit breaker as described above, most cases are installed at the same place. In this case, if the existing foundation 7 cannot be used due to the basic design of the equipment, remodeling of the foundation 7 or construction such as foundation excavation is required. Conventionally, in such foundation work, after existing equipment was removed, existing foundations were remodeled or new foundations were constructed. Since such foundation work takes a long time of about one month, it is necessary to secure a separate power supply during that period. Therefore, power supply is separately prepared by using a mobile device or the like, and predetermined foundation work is performed while power is supplied by the mobile device.

ところが、かかる従来の更新工事では、工期が長くなるばかりでなく、移動機器等の準備、移動機器からの電力の供給に先立つ各種の調整、移動機器を切り離して元の系統からの電力供給に先立つ各種の調整を行う必要がある。また、電力供給の切替に伴う前記各種の調整の中には停電を伴うものもある。したがって、移動機器の準備、停電のための準備等でも工事の円滑な遂行が阻害されている。そこで、更新工事の円滑な遂行という観点からより合理的な工事方法の提案が望まれている。   However, in this conventional renewal work, not only the construction period is lengthened, but also preparation of mobile equipment, various adjustments prior to power supply from mobile equipment, and disconnection of mobile equipment prior to power supply from the original system Various adjustments need to be made. Some of the various adjustments associated with the switching of the power supply involve a power failure. Therefore, the smooth execution of construction is impeded by the preparation of mobile devices and preparations for power outages. Therefore, a proposal of a more rational construction method is desired from the viewpoint of smooth execution of renewal construction.

この種の更新工事における工期の短縮を実現した公知文献として特許文献１がある。これは、ガス遮断器本体をアダプターベースを介して既設基礎に据え付けるようにしたガス遮断器の据付装置において、前記アダプターベースを前記ガス遮断器本体の脚部の設置面積の大きさとし、このアダプターベースを介して前記ガス遮断器本体の脚部および前記既設基礎とをホールインアンカーボルトにより据え付けるようにしたものである。このことにより、基礎は更新することなく既設のアダプターベースを新規のガス遮断器でも使用し得るようにして、アダプターベースの更新工事に要する工期を短縮することで全体の工期の可及的短縮を企図したものである。   There is Patent Document 1 as a publicly known document realizing a shortening of the construction period in this type of renewal work. This is a gas circuit breaker installation device in which the gas circuit breaker body is installed on an existing base via an adapter base, and the adapter base is set to have a large installation area of the leg portion of the gas circuit breaker body. The leg portion of the gas circuit breaker main body and the existing foundation are installed with a hole-in anchor bolt through the squeeze. As a result, the existing adapter base can be used with a new gas circuit breaker without renewing the foundation, and the overall construction period can be shortened as much as possible by shortening the construction period required for the adapter base renewal work. It is intended.

特開平１０−１４０３５号公報JP-A-10-14035

ところが、特許文献１に開示する場合には、工期の短縮は実現し得るものの、基礎を兼用することを前提としているので、基礎の更新が必要とされる場合には、移動機器の準備、これに伴う各種の調整や停電等に関する問題は解決されることなくそのまま残る。ちなみに、遮断器の更新目安年数は、通常３０〜４０年であるため、既設の基礎を流用してアンカーボルトで固定するには経年劣化による強度に不安がある。また、基礎を流用する場合、基礎計算を検討する必要があるが、基礎鉄筋の有無が図面でしか検証できないため、実際上の基礎計算の結果との間の乖離が懸念材料となる。したがって、同一場所で機器を更新する場合でも、基礎工事の更新も行われている。   However, in the case disclosed in Patent Document 1, although it is possible to shorten the construction period, it is assumed that the foundation is also used. Therefore, when the foundation needs to be updated, preparation of the mobile device, this Problems related to various adjustments and power outages, etc., remain without being solved. By the way, since the renewal standard years of the circuit breaker are usually 30 to 40 years, there is anxiety about the strength due to aging when diverting the existing foundation and fixing with the anchor bolt. In addition, when diverting the foundation, it is necessary to consider the basic calculation. However, since the presence or absence of the basic rebar can be verified only with the drawings, the deviation from the actual result of the basic calculation becomes a concern. Therefore, even if the equipment is updated at the same place, the foundation work is also updated.

本発明は、上記従来技術の問題点に鑑み、停電期間および工期を可及的に短縮し得る合理的な電気機器の更新工事方法を提供することを目的とする。   The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a rational method for renewing an electrical apparatus that can shorten the power failure period and the construction period as much as possible.

本発明の第１の態様は、
本体が架台上に載置され、前記架台の下方の地面との間に空間が存在するとともに、地面に形成された基礎上に脚部が当接して据え付けられる電気機器の更新工事方法であって、
既設の電気機器の架台の脚部が当接する部分の既設の基礎を残し、前記架台の下部の空間を利用して新設の電気機器に適合した新設の基礎の工事を行う工程と、
新設の基礎の工事が終了した後、既設の電気機器を架台ごと撤去する工程と、
新設の基礎上に新設の電気機器の架台を据付・固定する工程と、
新設の電気機器の前記架台上に新設の電気機器の本体を載置する工程とを有することを特徴とする電気機器の更新工事方法にある。 The first aspect of the present invention is:
An electrical equipment renewal construction method in which a main body is placed on a base, a space exists between the base and the ground below the base, and a leg is in contact with a base formed on the ground. ,
Leaving the existing foundation where the legs of the base of the existing electrical equipment come into contact, and using the space below the base to construct a new foundation suitable for the new electrical equipment;
After the construction of the new foundation is completed, the process of removing the existing electrical equipment together with the gantry,
A process of installing and fixing a base of a new electrical device on a new foundation;
And a step of placing the main body of the new electric device on the mount of the new electric device.

本発明の第２の態様は、
第１の態様に記載する電気機器の更新工事方法において、
新設の基礎の工事が終了した後、既設の電気機器を架台ごと撤去した後、新設の基礎上に新設の電気機器の架台を据付・固定するまでは系統を停電させることを特徴とする電気機器の更新工事方法にある。 The second aspect of the present invention is:
In the electric equipment renewal construction method described in the first aspect,
After the construction of the new foundation is completed, the existing electrical equipment is removed together with the base, and then the system is powered down until the base of the new electrical equipment is installed and fixed on the new foundation. It is in the renewal construction method.

本発明の第３の態様は、
第１または第２の態様に記載する電気機器の更新工事方法において、
新設の基礎は前記空間の下方のみに形成することを特徴とする電気機器の更新工事方法にある。 The third aspect of the present invention is:
In the electric equipment renewal construction method described in the first or second aspect,
The foundation of the new construction is an electrical equipment renewal construction method characterized in that it is formed only below the space.

本発明の第４の態様は、
第１〜第３の態様の何れか一つに記載する電気機器の更新工事方法において、
新設の基礎は前記空間の下方と前記既設の基礎の脚部に相当する部分の外側にも形成することを特徴とする電気機器の更新工事方法にある。 The fourth aspect of the present invention is:
In the electrical equipment renewal construction method described in any one of the first to third aspects,
The new foundation is formed on the lower part of the space and outside the portion corresponding to the legs of the existing foundation.

本発明の第５の態様は、
第１〜第４の態様の何れか一つに記載する電気機器の更新工事方法において、
新設の基礎は、既設の電気機器の架台の脚部に対応させて残されている既設の基礎と一体的に連続させてあることを特徴とする電気機器の更新工事方法にある。 According to a fifth aspect of the present invention,
In the electric equipment renewal construction method described in any one of the first to fourth aspects,
The newly established foundation is an electrical equipment renewal construction method characterized in that the foundation is continuously integrated with the existing foundation left in correspondence with the legs of the pedestal of the existing electrical equipment.

本発明の第６の態様は、
第１〜第５の態様の何れか一つに記載する電気機器の更新工事方法において、
前記電気機器は、架台に本体が載置される屋外型の遮断器または断路器であることを特徴とする電気機器の更新工事方法にある。 The sixth aspect of the present invention is:
In the electrical equipment renewal construction method described in any one of the first to fifth aspects,
The electrical apparatus is an outdoor apparatus circuit breaker or disconnector in which a main body is placed on a gantry.

本発明によれば、電気機器の架台下の空間を利用して既設の電気機器の使用を継続したままで更新する新規の電気機器のための基礎工事を行うようにしたので、新規電気機器への更新工事における工期および停電期間の可及的な短縮化を容易に図ることができる。また、電力供給確保のための、移動機器による供給対策が不要となり、移動機器の容量の制約が不要となる。さらに、工事費用の低減化を図ることができるばかりでなく、系統の安定度を維持することができるという副次的な効果も奏する。   According to the present invention, since the foundation work for the new electric device that is renewed while continuing to use the existing electric device using the space under the gantry of the electric device is performed, It is possible to easily shorten the work period and power outage period in the renewal work as much as possible. Further, supply measures by the mobile device for securing power supply are not required, and the capacity of the mobile device is not restricted. Furthermore, not only can the construction cost be reduced, but there is also a secondary effect that the stability of the system can be maintained.

本発明の実施の形態に係る更新工事方法により更新されるタンク型遮断器を既存のタンク型遮断器とともに概念的に示す説明図である。It is explanatory drawing which shows notionally the tank type circuit breaker updated by the update construction method which concerns on embodiment of this invention with the existing tank type circuit breaker. 本発明の実施の形態に係る更新工事方法を示す工程図である。It is process drawing which shows the update construction method which concerns on embodiment of this invention. 本発明の実施の形態に係る更新工事方法を示す工程図である。It is process drawing which shows the update construction method which concerns on embodiment of this invention. 本発明の実施の形態に係る更新工事方法を示す工程図である。It is process drawing which shows the update construction method which concerns on embodiment of this invention. 既存のタンク型遮断器を概念的に示す説明図である。It is explanatory drawing which shows the existing tank type circuit breaker notionally.

以下、本発明の実施の形態を図面に基づき詳細に説明する。
図１は本発明の実施の形態に係る更新工事方法により更新されるタンク型遮断器を既存のタンク型遮断器（図中に一点鎖線で示す）とともに概念的に示す説明図である。同図に示すように、当該タンク型遮断器IIも、図５に示すタンク型遮断器Ｉと同様に、三相の各相に対応させて設けられた遮断部１２Ａ，１２Ｂ，１２Ｃ、ブッシング１３Ａ，１３Ｂ，１３Ｃおよび操作箱１４等からなる本体１１の部分を架台１５に載置することで地面６に据え付けられている。ここで、架台１５はその脚部１５Ａが、地面６に形成されたコンクリートの基礎１７上に載置されアンカーボルト（図１には図示せず）等の締結部材を介して固定されている。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an explanatory view conceptually showing a tank type circuit breaker renewed by the renewal construction method according to the embodiment of the present invention together with an existing tank type circuit breaker (indicated by a one-dot chain line in the figure). As shown in the figure, the tank type circuit breaker II is also provided with circuit breakers 12A, 12B, 12C, bushings 13A provided corresponding to the three phases, similar to the tank type circuit breaker I shown in FIG. , 13B, 13C and the operation box 14 are mounted on the ground 6 by placing a portion of the main body 11 on the gantry 15. Here, the leg 15 </ b> A of the gantry 15 is placed on a concrete foundation 17 formed on the ground 6 and is fixed via a fastening member such as an anchor bolt (not shown in FIG. 1).

かかるタンク型遮断器IIで既設のタンク型遮断器Ｉを更新する際の更新工事は次のような方法で行う。図２、図３および図４は当該更新工事方法を時系列的に示す工程図である。なお、同図中、図１および図５と同一部分には同一番号を付し、重複する説明は省略する。   The renewal work for renewing the existing tank breaker I with the tank breaker II is performed as follows. 2, 3 and 4 are process diagrams showing the renewal construction method in time series. In the figure, the same parts as those in FIGS. 1 and 5 are denoted by the same reference numerals, and redundant description is omitted.

本形態は、図２（ａ）に示すように、地面６に形成された基礎７に据え付けられた電気機器であるタンク型遮断器Ｉを既設の電気機器として、これを更新する場合の更新工事方法である。   In the present embodiment, as shown in FIG. 2 (a), the tank type circuit breaker I which is an electric device installed on the foundation 7 formed on the ground 6 is used as an existing electric device, and the renewal work is performed when this is updated. Is the method.

当該更新工事では、まず図２（ｂ）に示すように、既設のタンク型遮断器Ｉの架台５を変電所構内の鉄構２０等、頑丈な構造物に鋼管パイプ等の連結材２１を介して固定する。このことにより、タンク型遮断器Ｉの転倒を防止する。かかる状態で架台５の下部の空間を利用して既設の基礎７の取壊し工事を行う。このとき、既設のタンク型遮断器Ｉの架台５の脚部５Ａが当接する部分の既設の基礎７は残しておく。このことにより、既設のタンク型遮断器Ｉは継続して使用することができる。すなわち、既設の基礎７の取壊し工事は系統の停電を伴わないタンク型遮断器Ｉを継続して系統に接続したままでの工事となる。既設の基礎７の所定範囲の取壊しが完了した時点で、図２（ｃ）に示すように、除去した既存の基礎７の部分に新規のアンカーボルト２２とともに新規の基礎１７を形成する。ここで、本形態では既設の脚部５Ａに対応させて残した基礎７に一体的に連続させてある。このことにより、新設の基礎１７の補強も可能になる。また、新規な基礎１７の工事は、具体的には基礎１７の配筋・型枠・生コン打設・養生をその内容とするものである。かかる一連の工事も既設のタンク型遮断器Ｉを使用して系統を停電させることなく施工する。すなわち、新設の基礎１７の工事が完了するまでは仮設の電源等を用意しなくても系統を停電させる必要はない。   In the renewal work, first, as shown in FIG. 2 (b), an existing tank type circuit breaker I mount 5 is attached to a sturdy structure such as a steel structure 20 in a substation via a connecting material 21 such as a steel pipe. And fix. This prevents the tank type circuit breaker I from overturning. In this state, the existing foundation 7 is demolished using the space below the gantry 5. At this time, the existing foundation 7 of the part with which the leg part 5A of the mount 5 of the existing tank type circuit breaker I abuts is left. Thus, the existing tank type circuit breaker I can be continuously used. That is, the demolition work of the existing foundation 7 is a work in which the tank-type circuit breaker I without the power failure of the system is continuously connected to the system. When the predetermined range of the existing foundation 7 is demolished, a new foundation 17 is formed together with a new anchor bolt 22 on the removed existing foundation 7 as shown in FIG. Here, in this embodiment, the base 7 left in association with the existing leg 5A is integrally continued. This also makes it possible to reinforce the newly installed foundation 17. In addition, the construction of the new foundation 17 specifically includes reinforcement, formwork, ready-mixing placement and curing of the foundation 17. Such a series of construction work is also carried out by using the existing tank type circuit breaker I without causing a power failure of the system. In other words, until the construction of the new foundation 17 is completed, it is not necessary to power out the system without preparing a temporary power source or the like.

新規な基礎１７に関連する工事が完了した後、既設のタンク型遮断器Ｉを停電させる。その後、図３（ａ）に示すように、脚部５Ａの基礎７に対する固定を解除し、クレーン２３で既設のタンク型遮断器Ｉを撤去する。   After the construction related to the new foundation 17 is completed, the existing tank type circuit breaker I is blacked out. Then, as shown to Fig.3 (a), fixation with respect to the foundation 7 of the leg part 5A is cancelled | released, and the existing tank type circuit breaker I is removed with the crane 23. FIG.

その後、図３（ｂ）に示すように、新規なタンク型遮断器IIの架台１５を新規な基礎１７上にアンカーボルト２２（図３（ａ）参照）を介して固定するとともに、クレーン２３で吊るしたタンク型遮断器IIの本体１１を架台１５上に載置する。   Thereafter, as shown in FIG. 3 (b), the frame 15 of the new tank type circuit breaker II is fixed on the new foundation 17 via the anchor bolt 22 (see FIG. 3 (a)). The main body 11 of the suspended tank type circuit breaker II is placed on the mount 15.

かかる状態で図４に示すように、本体１１を架台１５に固定し、新規なタンク型遮断器IIの所定の試験を行うことで当該更新工事が完了する。   In this state, as shown in FIG. 4, the renewal work is completed by fixing the main body 11 to the mount 15 and performing a predetermined test of the new tank type circuit breaker II.

かかる本形態によれば、工事中停電回数が１回で済み、電力を供給している需要者への影響を可及的に低減し得る。ちなみに、従来では、仮設電源への切替の際に１回、新規機器を接続する際に１回の計２回の停電を伴っていた。また、新規な基礎１７が完成すれば既設のタンク型遮断器Ｉの撤去および新規なタンク型遮断器IIの据付工事は１〜３日程度で完了するので、仮設の電源等を用意することなくその間停電しても問題がない場合が多い。したがって、この場合には従来工事においては実施していた電力の仮供給対策（移動用電力ケーブル〜移動用遮断器）を実施しなくても良く、作業量の減少、コスト削減を達成することが可能になる。ただ、もし既設のタンク型遮断器Ｉの撤去および新規なタンク型遮断器IIの据付工事の期間中の停電が不都合を生起する場合には移動機器を用意する。   According to this form, the number of power outages during construction is only one, and the influence on the consumers who are supplying power can be reduced as much as possible. Incidentally, in the past, there was a total of two power outages, once when switching to a temporary power source and once when connecting a new device. Moreover, once the new foundation 17 is completed, the removal of the existing tank breaker I and the installation work of the new tank breaker II will be completed in about 1 to 3 days, so there is no need to prepare a temporary power supply etc. During that time, there is often no problem with a power failure. Therefore, in this case, it is not necessary to implement temporary power supply measures (moving power cable to moving circuit breaker) that have been implemented in conventional construction, and a reduction in the amount of work and cost reduction can be achieved. It becomes possible. However, if the power outage during the removal of the existing tank type circuit breaker I and the installation work of the new tank type circuit breaker II causes inconvenience, mobile equipment will be prepared.

なお、上記実施の形態では電気機器としてタンク型遮断器を例に採り、その更新工事について説明したが、更新する電気機器としては、勿論タンク型遮断器に限るものではない。電気機器の本体が架台上に載置され、架台の下方の地面との間に空間が存在するとともに、地面に形成された基礎上に脚部が当接して据え付けられる電気機器であれば、それ以上の限定は必要ない。例えば、各種の遮断器や断路器が対象となる。   In the above embodiment, the tank type circuit breaker is taken as an example of the electric device, and the renewal work has been described. However, the electric device to be updated is not limited to the tank type circuit breaker. If the electrical equipment main body is placed on a gantry and there is a space between the ground below the gantry and the legs are abutting on the foundation formed on the ground, then the electrical equipment The above limitation is not necessary. For example, various circuit breakers and disconnectors are targeted.

また、上記実施の形態では新規の基礎が既設の基礎の脚部に相当する部分の間に全体が収まっている場合であるが、これに限るものではない。脚部よりも外側に張り出して基礎を形成する必要がある場合には、そのように形成すれば良い。   In the above embodiment, the new foundation is entirely located between the portions corresponding to the legs of the existing foundation. However, the present invention is not limited to this. If it is necessary to form the foundation by projecting outward from the legs, such a method may be used.

この場合でも架台の下方の空間を利用すれば、その部分の基礎工事を含め、前記脚部より外側領域の基礎工事も既設の電気機器を撤去することなく活線状態で工事を進めることができる。また、既設電気機器の脚部に対応させて残された既設の基礎部分と新設の基礎部分とを一体的に連結させることも必須ではないが、一体化することにより両者が一体となって所定の強度が保証される。   Even in this case, if the space below the pedestal is used, the foundation work in the area outside the legs, including the foundation work of that part, can be carried out in a live state without removing the existing electrical equipment. . In addition, it is not essential to integrally connect the existing foundation part and the new foundation part left in correspondence with the legs of the existing electrical equipment. The strength of is guaranteed.

本発明は地面に形成した基礎の上に据え付ける電気機器を使用する産業分野において利用することができる。   The present invention can be used in an industrial field in which an electric device installed on a foundation formed on the ground is used.

Ｉ，II タンク型遮断器
１，１１ 本体
５，１５ 架台
６ 地面
７，１７ 基礎
I, II Tank type circuit breaker 1,11 Body 5,15 Base 6 Ground 7,17

Claims (6)

本体が架台上に載置され、前記架台の下方の地面との間に空間が存在するとともに、地面に形成された基礎上に脚部が当接して据え付けられる電気機器の更新工事方法であって、
既設の電気機器の架台の脚部が当接する部分の既設の基礎を残し、前記架台の下部の空間を利用して新設の電気機器に適合した新設の基礎の工事を行う工程と、
新設の基礎の工事が終了した後、既設の電気機器を架台ごと撤去する工程と、
新設の基礎上に新設の電気機器の架台を据付・固定する工程と、
新設の電気機器の前記架台上に新設の電気機器の本体を載置する工程とを有することを特徴とする電気機器の更新工事方法。 An electrical equipment renewal construction method in which a main body is placed on a base, a space exists between the base and the ground below the base, and a leg is in contact with a base formed on the ground. ,
Leaving the existing foundation where the legs of the base of the existing electrical equipment come into contact, and using the space below the base to construct a new foundation suitable for the new electrical equipment;
After the construction of the new foundation is completed, the process of removing the existing electrical equipment together with the gantry,
A process of installing and fixing a base of a new electrical device on a new foundation;
And a step of placing the main body of the new electric device on the mount of the new electric device. 請求項１に記載する電気機器の更新工事方法において、
新設の基礎の工事が終了した後、既設の電気機器を架台ごと撤去した後、新設の基礎上に新設の電気機器の架台を据付・固定するまでは系統を停電させることを特徴とする電気機器の更新工事方法。 In the electric equipment renewal construction method according to claim 1,
After the construction of the new foundation is completed, the existing electrical equipment is removed together with the base, and then the system is powered down until the base of the new electrical equipment is installed and fixed on the new foundation. Renewal construction method. 請求項１または請求項２に記載する電気機器の更新工事方法において、
新設の基礎は前記空間の下方のみに形成することを特徴とする電気機器の更新工事方法。 In the electric equipment renewal construction method according to claim 1 or claim 2,
A method for renewal of electrical equipment, characterized in that a new foundation is formed only below the space. 請求項１〜請求項３の何れか一つに記載する電気機器の更新工事方法において、
新設の基礎は前記空間の下方と前記既設の基礎の脚部に相当する部分の外側にも形成することを特徴とする電気機器の更新工事方法。 In the electric equipment renewal construction method according to any one of claims 1 to 3,
The method for renewing an electric device is characterized in that a new foundation is formed below the space and outside a portion corresponding to a leg portion of the existing foundation. 請求項１〜請求項４の何れか一つに記載する電気機器の更新工事方法において、
新設の基礎は、既設の電気機器の架台の脚部に対応させて残されている既設の基礎と一体的に連続させてあることを特徴とする電気機器の更新工事方法。 In the electric equipment renewal construction method according to any one of claims 1 to 4,
A method for renewal of electrical equipment, characterized in that the newly established foundation is integrated with the existing foundation left in correspondence with the legs of the existing electrical equipment stand. 請求項１〜請求項５の何れか一つに記載する電気機器の更新工事方法において、
前記電気機器は、架台に本体が載置される屋外型の遮断器または断路器であることを特徴とする電気機器の更新工事方法。
In the electric equipment renewal construction method according to any one of claims 1 to 5,
The electrical equipment is an outdoor type circuit breaker or disconnector in which a main body is placed on a gantry.
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