JPH0419682B2 - - Google Patents
Info
- Publication number
- JPH0419682B2 JPH0419682B2 JP58114614A JP11461483A JPH0419682B2 JP H0419682 B2 JPH0419682 B2 JP H0419682B2 JP 58114614 A JP58114614 A JP 58114614A JP 11461483 A JP11461483 A JP 11461483A JP H0419682 B2 JPH0419682 B2 JP H0419682B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- electrical equipment
- filled electrical
- hydraulic
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformer Cooling (AREA)
Description
【発明の詳細な説明】
この発明は変圧器、リアクトルなどの油入電気
機器に関する。従来、油入電気機器には油入電気
機器内部に短絡事故が発生した場合、アークによ
り油が気化し、油圧が急激に上昇することに着目
し、事故の拡大を防止するための衝撃油圧継電器
が用いられている。衝撃油圧継電器は上記圧力上
昇を検出し、警報を発つしたり電気機器の電源回
路をシヤ断する信号を発生させるものである。従
来から用いられている衝撃油圧継電器の構造を第
１図に示す。図において、１は框体、２はセパレ
ートベロー、３は油室、４はマイクロスイツチ動
作ベロー、５は空気室、６はイコライザ、７はリ
ード、８は端子台、９はスプリング、１０はマイ
クロスイツチである。衝撃油圧継電器は第２図の
ように油入電気機器にとりつけられている。第２
図において１１は衝撃油圧継電器、１２は油入電
気機器、１３は衝撃油圧継電器、と油入電気機器
を接続する接続管である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to oil-filled electrical equipment such as transformers and reactors. Conventionally, impact hydraulic relays have been developed for oil-filled electrical equipment, focusing on the fact that when a short-circuit accident occurs inside the equipment, the oil vaporizes due to an arc and the oil pressure rises rapidly. is used. The impact hydraulic relay detects the pressure increase and generates a signal to issue an alarm or shut off the power circuit of the electrical equipment. Figure 1 shows the structure of a conventionally used impact hydraulic relay. In the figure, 1 is a frame, 2 is a separate bellows, 3 is an oil chamber, 4 is a micro switch operation bellow, 5 is an air chamber, 6 is an equalizer, 7 is a lead, 8 is a terminal block, 9 is a spring, 10 is a micro It's a switch. An impact hydraulic relay is attached to oil-filled electrical equipment as shown in Figure 2. Second
In the figure, 11 is an impact hydraulic relay, 12 is an oil-filled electrical device, and 13 is a connecting pipe that connects the impact hydraulic relay and the oil-filled electrical device.
前述したように衝撃油圧継電器は油入電気機器
の内部事故によるアーク等により発生したガスに
よる急激な油圧の圧力上昇を検出するものであ
る。以下に動作について説明する。事故が起つた
場合圧力は油室３の油を介してセパレートベロー
２に加わりスプリング９に抗して圧縮される。セ
パレートベロー２が圧縮されると空気室５の空気
が圧縮され圧力が上昇する。従つてマイクロスイ
ツチ動作ベロー４が伸張し、マイクロスイツチベ
ロー４の端部に設けられたマイクロスイツチ１０
を動作させ、電気信号をリード７、端子台８を介
して制御装置へ送る。 As mentioned above, the impact hydraulic relay detects a sudden rise in hydraulic pressure due to gas generated by arcing or the like due to an internal accident in oil-filled electrical equipment. The operation will be explained below. In the event of an accident, pressure is applied to the separate bellows 2 through the oil in the oil chamber 3 and compressed against the spring 9. When the separate bellows 2 is compressed, the air in the air chamber 5 is compressed and the pressure increases. Therefore, the micro switch operating bellows 4 is extended, and the micro switch 10 provided at the end of the micro switch bellows 4 is extended.
is operated and an electrical signal is sent to the control device via the lead 7 and terminal block 8.
一方、油入電気機器の負荷変動や周囲温度の変
化による緩漫な油圧の圧力上昇に対してはセパレ
ートベロー２の変位の時間変化が少く空気室５内
の空気圧の圧力上昇速度も小さい。このような場
合には細管で構成されたイコライザ６により、空
気室５の内部の空気が逃げるため空気室５の空気
圧力の上昇がなく、マイクロスイツチ動作ベロー
４は伸張しないのでマイクロスイツチ１０は動作
することはない。なお、内部事故の場合のように
油圧の上昇速度が急激な場合にはイコライザ６か
らにげる空気の量が制約されているため、空気室
５の圧力が上昇する。しかしこのような衝撃油圧
継電器は地震あるいは衝撃油圧継電器がとりつけ
られている油入電気機器以外の機器の短絡事故
（以下外部短絡と記す）などに起因する振動ある
いはポンプ起動時の油圧変動によつて衝撃油圧継
電器１１と接続管１３との固有振動数で生じた油
圧共振に起因して油室３の油圧圧力上昇しマイク
ロスイツチ１０が動作する場合が生じるという欠
点があつた。 On the other hand, with respect to gradual increases in hydraulic pressure due to load fluctuations in oil-filled electrical equipment or changes in ambient temperature, the displacement of the separate bellows 2 changes little over time, and the rate of increase in the air pressure in the air chamber 5 is also small. In such a case, the air inside the air chamber 5 escapes due to the equalizer 6 made up of a thin tube, so the air pressure in the air chamber 5 does not increase, and the micro switch operation bellow 4 does not expand, so the micro switch 10 does not operate. There's nothing to do. Note that when the oil pressure increases rapidly, such as in the case of an internal accident, the pressure in the air chamber 5 increases because the amount of air that can escape from the equalizer 6 is restricted. However, such shock hydraulic relays are susceptible to vibrations caused by earthquakes or short-circuit accidents (hereinafter referred to as external short-circuits) of equipment other than the oil-filled electrical equipment to which the shock hydraulic relay is installed, or by oil pressure fluctuations when starting the pump. There is a drawback that the hydraulic pressure in the oil chamber 3 increases due to hydraulic resonance caused by the natural frequency of the impact hydraulic relay 11 and the connecting pipe 13, and the micro switch 10 may operate.
この発明は上記欠点である地震、外部短絡など
による振動による動作を防止し、真に油入電気機
器の内部事故にのみ動作する衝撃油圧継電器を具
備する油入電気機器を供することを目的とする。 The purpose of this invention is to provide oil-filled electrical equipment equipped with an impact hydraulic relay that prevents the above drawbacks from operating due to vibrations caused by earthquakes, external short circuits, etc., and which truly operates only in the event of an internal accident in the oil-filled electrical equipment. .
第３図はこの考案の一実施例を示すものであ
り、図において１１〜１３は第２図と同一のもの
であり、２０はオリフイスを示す。オリフイス２
０の詳細を第４図に示す。また第５図には衝撃油
圧継電器１１の框体にオリフイス２１を設けた例
を示す。第５図の衝撃油圧継電器１１を第２図の
ように用いることも可能である。 FIG. 3 shows an embodiment of this invention, in which numerals 11 to 13 are the same as those in FIG. 2, and 20 represents an orifice. Orifice chair 2
The details of 0 are shown in FIG. Further, FIG. 5 shows an example in which an orifice 21 is provided in the frame of the impact hydraulic relay 11. It is also possible to use the impact hydraulic relay 11 of FIG. 5 as shown in FIG.
以下、この考案の作用について従来例と比較し
て説明する。 Hereinafter, the effect of this invention will be explained in comparison with a conventional example.
油入電気機器に地震、外部短絡などによる油圧
変動が起つた場合に、その油圧の振動はランダム
波形であり、すべての周波数成分をもつ。 When hydraulic pressure fluctuations occur in oil-filled electrical equipment due to earthquakes, external short circuits, etc., the hydraulic vibrations have a random waveform and have all frequency components.
従つて第２図に示す従来形の油入電気機器では
衝撃油圧継電器およびその接続管系のもつ固有振
動数fnに於て共振し、衝撃油圧継電器内の油の圧
力は第６図のような圧力波形を示す。 Therefore, in the conventional oil-filled electrical equipment shown in Figure 2, the impact hydraulic relay and its connecting pipe system resonate at the natural frequency fn, and the oil pressure in the impact hydraulic relay is as shown in Figure 6. Shows pressure waveform.
また油入電気機器１２の圧力PTと衝撃油圧継
電器内部の圧力PSの比と、周波数ｆとの関係は第
７図の特性Ａとなり、共振周波数fnでは、PTの数
倍となる。このため第６図に示すように、衝撃油
圧継電器の動作圧力Poを越え、マイクロスイツ
チを作動させることが起る。 Further, the relationship between the ratio of the pressure P T of the oil-filled electrical equipment 12 to the pressure P S inside the impact hydraulic relay and the frequency f is the characteristic A shown in FIG. 7, and at the resonance frequency fn, it is several times P T. For this reason, as shown in FIG. 6, the operating pressure Po of the impact hydraulic relay is exceeded and the micro switch is activated.
一方、本発明のオリフイス２０を設けた第３図
のものあるいは第５図に示す衝撃油圧継電器１１
を用いる場合にはオリフイスの減衰効果により、
第７図の特性Ｂのようになり、衝撃油圧継電器内
の油の圧力は、第８図のようになり、動作圧力
Poを越えない。 On the other hand, the impact hydraulic relay 11 shown in FIG. 3 or shown in FIG. 5 is equipped with the orifice 20 of the present invention.
When using, due to the damping effect of the orifice,
The characteristic B in Figure 7 will be shown, and the oil pressure in the impact hydraulic relay will be as shown in Figure 8, and the operating pressure will be as shown in Figure 8.
Do not exceed Po.
なお油入電気機器１２の内部事故の場合にはオ
リフイスの有無にかかわらず動作するのは当然で
ある。 Note that in the case of an internal accident in the oil-filled electrical equipment 12, it goes without saying that the system will operate regardless of the presence or absence of the orifice.
以上本発明による油入電気機器は、電気機器か
ら衝撃油圧継電器に向かう油の通路に、衝撃油圧
継電器と接続管との固有振動数で生じる油圧共振
を抑制するためのオリフイスを設けるという簡単
な構成により、地震、外部短絡による衝撃油圧継
電器の誤動作が防止されるという効果がある。 As described above, the oil-filled electrical equipment according to the present invention has a simple structure in which an orifice is provided in the oil path from the electrical equipment to the impact hydraulic relay to suppress hydraulic resonance that occurs due to the natural frequency of the impact hydraulic relay and the connecting pipe. This has the effect of preventing malfunctions of the shock hydraulic relay due to earthquakes and external short circuits.
第１図は衝撃油圧継電器の構成図、第２図は従
来の油入電気機器の衝撃油圧継電器の部分を強調
した概要図、第３図は本発明の油入電気機器の概
要図、第４図は本発明に用いられるオリフイスの
概略図、第５図は本発明の構成を一体化した衝撃
油圧継電器の構成図、また油入電気機器が地震、
外部短絡を受けた場合の衝撃油圧継電器内の油圧
変動特性を、従来例は第６図に本発明の例を第８
図に示す。第７図は従来例および、本発明の油入
電気機器本体圧力と衝撃油圧継電器内圧力の応答
特性を示す。
図において、１は框体、２はセパレートベロ
ー、３は油室、４はマイクロスイツチ動作ベロ
ー、５は空気室、６はイコライザ、７はリード、
８は端子台、９はスプリング、１０はマイクロス
イツチ、１１は衝撃油圧継電器、１２は油入電気
機器、１３は接続管、２０，２１はオリフイスを
示す。
Fig. 1 is a configuration diagram of an impact hydraulic relay, Fig. 2 is a schematic diagram highlighting the impact hydraulic relay of a conventional oil-filled electrical equipment, Fig. 3 is a schematic diagram of an oil-filled electrical equipment of the present invention, and Fig. 4 is a schematic diagram of an oil-filled electrical equipment of the present invention. The figure is a schematic diagram of an orifice used in the present invention, and Figure 5 is a block diagram of an impact hydraulic relay that integrates the configuration of the present invention.
The hydraulic pressure fluctuation characteristics in the shock hydraulic relay when receiving an external short circuit are shown in Fig. 6 for the conventional example and Fig. 8 for the example of the present invention.
As shown in the figure. FIG. 7 shows the response characteristics of the oil-filled electrical equipment main body pressure and the internal pressure of the impact hydraulic relay of the conventional example and the present invention. In the figure, 1 is a frame, 2 is a separate bellows, 3 is an oil chamber, 4 is a micro switch operating bellows, 5 is an air chamber, 6 is an equalizer, 7 is a lead,
8 is a terminal block, 9 is a spring, 10 is a micro switch, 11 is an impact hydraulic relay, 12 is an oil-filled electric device, 13 is a connecting pipe, and 20 and 21 are orifices.
Claims (1)
事故に起因する衝撃的な油圧圧力上昇を検出し電
気機器の事故拡大を防止する信号を発生させる衝
撃油圧継電器、および衝撃油圧継電器を電気機器
に接続する油配管を備えた油入電気機器におい
て、前記電気機器から前記衝撃油圧継電器に向か
う油の通路に、衝撃油圧継電器と前記油配管とに
よる固有振動数で生じる油圧共振を抑制するため
のオリフイスを設けたことを特徴とする油入電気
機器。1. Shock hydraulic relays that detect a shocking increase in hydraulic pressure caused by an internal accident in oil-filled electrical equipment such as a transformer or reactor and generate a signal to prevent the accident from escalating to electrical equipment; In an oil-filled electrical device having a connecting oil pipe, an orifice is provided in an oil path from the electrical device to the impact hydraulic relay for suppressing hydraulic resonance generated at a natural frequency between the impact hydraulic relay and the oil pipe. Oil-filled electrical equipment characterized by being provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11461483A JPS607108A (en) | 1983-06-24 | 1983-06-24 | Oil-filled electric apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11461483A JPS607108A (en) | 1983-06-24 | 1983-06-24 | Oil-filled electric apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS607108A JPS607108A (en) | 1985-01-14 |
| JPH0419682B2 true JPH0419682B2 (en) | 1992-03-31 |
Family
ID=14642259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11461483A Granted JPS607108A (en) | 1983-06-24 | 1983-06-24 | Oil-filled electric apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS607108A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19517401C1 (en) * | 1995-05-15 | 1996-09-26 | Hydac Technology Gmbh | Equalisation device for rail locomotive transformer |
| US8790730B2 (en) | 2005-10-11 | 2014-07-29 | Purecircle Usa | Process for manufacturing a sweetener and use thereof |
| MX362676B (en) | 2011-02-10 | 2019-01-31 | Purecircle Usa | Stevia composition. |
| US10480019B2 (en) | 2011-08-10 | 2019-11-19 | Purecircle Sdn Bhd | Process for producing high-purity rubusoside |
| BR112014028819A2 (en) | 2012-05-22 | 2017-07-25 | Purecircle Sdn Bhd | high purity steviol glycosides |
| JP6085138B2 (en) | 2012-10-18 | 2017-02-22 | 矢崎総業株式会社 | Wire holding structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5917603B2 (en) * | 1976-05-14 | 1984-04-23 | 重熊 塚本 | Timing device for pressure relay |
-
1983
- 1983-06-24 JP JP11461483A patent/JPS607108A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS607108A (en) | 1985-01-14 |
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