JPS6130722B2 - - Google Patents
Info
- Publication number
- JPS6130722B2 JPS6130722B2 JP55101337A JP10133780A JPS6130722B2 JP S6130722 B2 JPS6130722 B2 JP S6130722B2 JP 55101337 A JP55101337 A JP 55101337A JP 10133780 A JP10133780 A JP 10133780A JP S6130722 B2 JPS6130722 B2 JP S6130722B2
- Authority
- JP
- Japan
- Prior art keywords
- winding
- parent
- child
- tertiary
- voltage
- 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
Links
- 238000004804 winding Methods 0.000 claims description 79
- 230000004323 axial length Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 230000007257 malfunction Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000004907 flux Effects 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 1
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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/38—Auxiliary core members; Auxiliary coils or windings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
Description
【発明の詳細な説明】
本発明は三次巻線付三相親子形計器用変圧器に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a three-phase parent-child instrument transformer with a tertiary winding.
一般に、一次巻線の一端を接地して使用する接
地形計器用変圧器においては、系統の事故時に発
生する雰相電圧を検出するため、三次巻線を備え
ている。 Generally, a grounded instrument transformer that uses one end of the primary winding that is grounded is equipped with a tertiary winding in order to detect the atmospheric voltage that occurs in the event of a fault in the system.
第１図は、二次巻線が親巻線と子巻線からなる
親子形計器用変圧器に三次巻線を巻いた従来の三
次巻線付親子形計器用変圧器の構成例を示したも
のである。 Figure 1 shows an example of the configuration of a conventional parent-child instrument transformer with a tertiary winding, in which a tertiary winding is wound around a parent-child instrument transformer whose secondary winding consists of a parent winding and a child winding. It is something.
図において、１は一次巻線で、Ｕ，Ｏはその端
子記号である。２，３は二次巻線で、それぞれ上
記一次巻線１と共通の鉄心５に巻かれ、そのうち
の一方を親巻線２とし、他方を子巻線３とする。
また、U1−O1，U2−O2はそれぞれ親巻線２およ
び子巻線３の端子記号である。４は上記一次およ
び二次回線１，２，３と同様に鉄心５に巻かれた
三次巻線で、ａ，ｂはその端子記号である。三次
巻線４は親巻線２とほぼ同一軸方向長さになるよ
うに親巻線２の外周上に巻かれている。 In the figure, 1 is the primary winding, and U and O are its terminal symbols. Reference numerals 2 and 3 designate secondary windings, each of which is wound around an iron core 5 common to the primary winding 1, one of which is the parent winding 2 and the other is the child winding 3.
Further, U 1 -O 1 and U 2 -O 2 are terminal symbols of the parent winding 2 and the child winding 3, respectively. 4 is a tertiary winding wound around the iron core 5 in the same way as the above-mentioned primary and secondary wires 1, 2, and 3, and a and b are its terminal symbols. The tertiary winding 4 is wound on the outer periphery of the parent winding 2 so as to have approximately the same length in the axial direction as the parent winding 2.
このように構成される三次巻線付親子形計器用
変圧器においては、親巻線２と子巻線３の端子
が、図示しない電圧差動継電器に接続され、親巻
線２または子巻線３自身の不具合による系統保護
継電器の誤動作を防止する機能を有している。 In a parent-child instrument transformer with a tertiary winding configured as described above, the terminals of the parent winding 2 and the child winding 3 are connected to a voltage differential relay (not shown), and the terminals of the parent winding 2 or the child winding 3 are connected to a voltage differential relay (not shown). 3. Has a function to prevent malfunction of the system protection relay due to malfunction of the relay itself.
ところで、第１図における６は親巻線２が、例
えば、端子U1−O1間で短絡した場合の主磁束を
概念的に図示したものであるが、その大部分は子
巻線３と鎖交するが三次巻線４とはその一部とし
か鎖交しない。即ち、三次巻線４は親巻線２のも
れインピーダンスと短絡電流の積から決まる電圧
に対応する磁束とだけ鎖交することになり、その
誘起電圧をV3とすると誘起電圧V3は定格三次電
圧Ｖ3Nの40〜60％になることが実験的に確認され
ている。 By the way, 6 in FIG. 1 conceptually shows the main magnetic flux when the parent winding 2 is short-circuited, for example, between terminals U 1 - O 1 , but most of it is between the child winding 3 and the main magnetic flux. However, only a portion of the tertiary winding 4 is interlinked with the tertiary winding 4. In other words, the tertiary winding 4 will be interlinked only with the magnetic flux corresponding to the voltage determined by the product of the leakage impedance of the parent winding 2 and the short-circuit current, and if the induced voltage is V3 , the induced voltage V3 will be the rated value. It has been experimentally confirmed that the tertiary voltage V3N is 40-60%.
第２図は、第１図のように構成された三次巻線
付親子形計器用変圧器３台を三相系統に接続した
場合の結線図で、第１図と同一符号は同一部分を
表わし、更に、７は三次巻線の開放三角結線端子
ａ−ｆ間に接続した零相電圧を検出する継電器で
ある。尚、二次巻線の接続計器類は図示していな
い。 Figure 2 is a wiring diagram when three parent-child instrument transformers with tertiary windings configured as shown in Figure 1 are connected to a three-phase system, and the same symbols as in Figure 1 represent the same parts. Further, 7 is a relay connected between open triangular connection terminals a and f of the tertiary winding to detect a zero-sequence voltage. Note that the instruments connected to the secondary winding are not shown.
図において、一次巻線Ｕ，Ｖ，Ｗに平衡三相電
圧が印加され、親巻線２、子巻線３のいずれにも
故障がない場合、開放三角結線端子ａ−ｆ間に発
生する零相電圧はほぼ零となる。ところが３台の
計器用変圧器のうちの１台の親巻線２が端子U1
−O1間で短絡すると、それと同一鉄心５上に巻
かれている三次巻線端子ａ−ｂ間の誘起電圧は前
述のようにV3＝（0.4〜0.6）×Ｖ3Nとなるため、開
放三角結線端子ａ−ｆ間に発生する電圧Ｖafは
Ｖaf＝V′3N−V3＝Ｖ3N−（0.4〜0.6）Ｖ3N
＝（0.6〜0.4）Ｖ3N ……(1)
となり、一般にＶ3N＝110V／３であるから、Ｖaf
≒22〜15Vとなる。この電圧値は継電器７の最小
整定値（一般に10V）を超過することになり、系
統に事故がないのにもかかわらず、継電器７が動
作するという欠点があつた。 In the figure, when a balanced three-phase voltage is applied to the primary windings U, V, and W, and there is no failure in either the parent winding 2 or the child winding 3, the zero that occurs between the open triangular connection terminals a and f. The phase voltage becomes almost zero. However, the main winding 2 of one of the three potential transformers is connected to terminal U 1 .
-O 1 , the induced voltage between the tertiary winding terminals a and b wound on the same iron core 5 will be V 3 = (0.4 to 0.6) x V 3N as described above, so if it is opened The voltage V af generated between the triangular connection terminals a and f is V af = V' 3N - V 3 = V 3N - (0.4 to 0.6) V 3N = (0.6 to 0.4) V 3N (1), and generally Since V 3N = 110V/3, V af
≒22~15V. This voltage value exceeds the minimum setting value (generally 10V) of the relay 7, and there was a drawback that the relay 7 operated even though there was no fault in the system.
本発明は上記従来装置の欠点を除き、誤動作の
ない三次巻線付三相親子形計器用変圧器を提供す
ることを目的とする。 SUMMARY OF THE INVENTION An object of the present invention is to provide a three-phase parent-child voltage transformer with a tertiary winding that eliminates the drawbacks of the conventional device and is free from malfunctions.
以下、本発明の一実施例を図を参照して説明す
る。 An embodiment of the present invention will be described below with reference to the drawings.
第３図は本発明の一実施例を示す三次巻線付親
子形計器用変圧器の構成図で、図中、第１図と同
一符号は同一または相当部分を示す。 FIG. 3 is a block diagram of a parent-child type voltage transformer with a tertiary winding, showing an embodiment of the present invention. In the figure, the same reference numerals as in FIG. 1 indicate the same or corresponding parts.
図の構成で、第１図の従来構成と異なる点は、
親巻線２、子巻線３および三次巻線４が各々の巻
線がラツプしないよう同一鉄心脚上にずらして巻
装されている点である。 The configuration in the figure differs from the conventional configuration in Figure 1 as follows:
The main winding 2, child winding 3, and tertiary winding 4 are wound on the same core leg in a staggered manner so that the respective windings do not overlap.
この構成によれば、親巻線２が端子U1−O1間
で短絡した場合も、主磁束６は、第３図の経路を
通るため、その殆どが子巻線３および三次巻線４
と鎖交する。この結果、これ等の巻線にはほぼ定
格電圧に近い電圧が誘起される。 According to this configuration, even if the parent winding 2 is short-circuited between the terminals U 1 -O 1 , the main magnetic flux 6 passes through the path shown in FIG.
interlink with As a result, a voltage approximately close to the rated voltage is induced in these windings.
このように構成される三次巻線付親子形計器用
変圧器３台を前記第２図のように、三相系統に接
続した状態で、３台のうちの任意の計器用変圧器
の親巻線２が端子間で短絡した場合でも、短絡し
た親巻線２と同一脚に巻回されている三次巻線の
誘起電圧V3はV3Ｖ3Nとなる。このため、開放
三角結線端子ａ−ｆ間に発生する電圧Ｖafは
Ｖaf＝Ｖ3N−V3０ ……(2)
となり、継電器７の最小整定値（一般には10V）
より小さくなり、計器用変圧器自身の不具合によ
る継電器７の誤動作を防ぎ、系統保護の信頼度が
向上することができる。 When the three parent-child instrument transformers with tertiary windings configured in this manner are connected to a three-phase system as shown in Fig. 2, the main winding of any of the three instrument transformers is Even if the wire 2 is short-circuited between its terminals, the induced voltage V 3 in the tertiary winding wound on the same leg as the short-circuited parent winding 2 will be V 3 V 3N . Therefore, the voltage V af generated between the open triangular connection terminals a and f is V af = V 3N - V 3 0 (2), and the minimum setting value of the relay 7 (generally 10 V)
This makes it possible to prevent the relay 7 from malfunctioning due to a malfunction in the voltage transformer itself, thereby improving the reliability of system protection.
以上は、親巻線２が短絡した場合であるが、子
巻線３が、端子間U2−O2で短絡した場合につい
ても、同様の理由によつて開放三角結線端子ａ−
ｆ間の電圧Ｖafは略零となり、継電器７の誤動作
を防止できる。 The above is a case where the parent winding 2 is short-circuited, but also when the child winding 3 is short-circuited between the terminals U 2 - O 2 , the open triangular connection terminal a - O 2 is short-circuited for the same reason.
The voltage V af between f becomes approximately zero, and malfunction of the relay 7 can be prevented.
尚、上記実施例では、親巻線２、子巻線３およ
び三次巻線４の各巻線がお互にラツプしないよう
に構成したが、継電器７の整定値によつては、例
えば親巻線２と三次巻線４を部分的にラツプさせ
て巻回することも可能である。 In the above embodiment, the main winding 2, the child winding 3, and the tertiary winding 4 are configured so that they do not overlap each other. However, depending on the setting value of the relay 7, for example, the main winding It is also possible to partially overlap the winding 2 and the tertiary winding 4.
以上のように本発明によれば三次巻線付親子形
計器用変圧器を３台組合せて使用する場合、親巻
線または子巻線がその端子間で短絡しても、開放
三角結線端子間に接続した継電器の誤動作を確実
に防止できる。このため、従来の三次巻線付三相
親子形計器用変圧器に比べ、系統保護の信頼度が
大巾に向上することになる。 As described above, according to the present invention, when three parent-child instrument transformers with tertiary windings are used in combination, even if the parent winding or child winding is short-circuited between their terminals, the open triangular connection terminals It is possible to reliably prevent malfunctions of relays connected to the Therefore, the reliability of system protection is greatly improved compared to the conventional three-phase parent-child instrument transformer with a tertiary winding.
第１図は従来の三次巻線付三相親子形計器用変
圧器の構成図、第２図は三次巻線付三相親子形計
器用変圧器を三相系統に適用した場合の接続図、
第３図は本発明の一実施例を示す三次巻線付三相
親子形計器用変圧器の構成図である。
１……一次巻線、２……親巻線、３……子巻
線、４……三次巻線、５……鉄心、６……主磁
束、７……保護継電器。
Figure 1 is a configuration diagram of a conventional three-phase parent-child instrument transformer with a tertiary winding, and Figure 2 is a connection diagram when the three-phase parent-child instrument transformer with a tertiary winding is applied to a three-phase system.
FIG. 3 is a block diagram of a three-phase parent-child instrument transformer with a tertiary winding, showing an embodiment of the present invention. 1... Primary winding, 2... Main winding, 3... Child winding, 4... Tertiary winding, 5... Iron core, 6... Main magnetic flux, 7... Protective relay.
Claims (1)
二次巻線および開放三角結線端子間に零相電圧検
出用の継電器を接続した三次巻線を巻装してなる
三次巻線付三相親子形計器用変圧器において、上
記一次巻線、二次巻線および三次巻線を、その軸
方向長さの中心を互にずらして同一鉄心脚に巻装
したことを特徴とする三次巻線付三相親子形計器
用変圧器。1 A tertiary winding consisting of a primary winding, a secondary winding consisting of a parent winding and a child winding, and a tertiary winding with a zero-phase voltage detection relay connected between the open triangular connection terminals. A three-phase parent-child instrument transformer, characterized in that the primary winding, secondary winding, and tertiary winding are wound around the same core leg with the centers of their axial lengths shifted from each other. Three-phase parent-child instrument transformer with tertiary winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10133780A JPS5727011A (en) | 1980-07-25 | 1980-07-25 | Main and subsidiary type potential transformer with tertiary wiring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10133780A JPS5727011A (en) | 1980-07-25 | 1980-07-25 | Main and subsidiary type potential transformer with tertiary wiring circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5727011A JPS5727011A (en) | 1982-02-13 |
| JPS6130722B2 true JPS6130722B2 (en) | 1986-07-15 |
Family
ID=14298017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10133780A Granted JPS5727011A (en) | 1980-07-25 | 1980-07-25 | Main and subsidiary type potential transformer with tertiary wiring circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5727011A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4503469B2 (en) * | 2005-03-04 | 2010-07-14 | 東光電気株式会社 | Molded instrument transformer manufacturing method and molded instrument transformer |
-
1980
- 1980-07-25 JP JP10133780A patent/JPS5727011A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5727011A (en) | 1982-02-13 |
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