JPH0210738U - - Google Patents
Info
- Publication number
- JPH0210738U JPH0210738U JP8610788U JP8610788U JPH0210738U JP H0210738 U JPH0210738 U JP H0210738U JP 8610788 U JP8610788 U JP 8610788U JP 8610788 U JP8610788 U JP 8610788U JP H0210738 U JPH0210738 U JP H0210738U
- Authority
- JP
- Japan
- Prior art keywords
- ground fault
- fault detection
- transformer
- detection relay
- zero
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 9
- 230000007935 neutral effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
第１図及び第２図はこの考案の地絡検出装置の
それぞれ異なる実施例を示す接続図、第３図及び
第４図はそれぞれ従来の非接地系及び高抵抗接地
系の電気系統に適用された地絡検出装置を示す接
続図である。
図中、１は母線、３は零相変流器、４は負荷、
５及び８はそれぞれ第１及び第２の地絡検出継電
器、５ａは電流巻線、６は接地形計器用変圧器、
７は抵抗器、９は遮断器、１０は電気機器（発電
機）、１１は接地抵抗器、１２は接点、１３はコ
ンデンサ形計器用変圧器である。なお、図中同一
符号は同一または相当部分を示す。
Fig. 1 and Fig. 2 are connection diagrams showing different embodiments of the ground fault detection device of this invention, and Fig. 3 and Fig. 4 are connection diagrams showing the connection diagrams respectively showing the different embodiments of the ground fault detection device of this invention. FIG. 2 is a connection diagram showing a ground fault detection device. In the figure, 1 is the bus bar, 3 is the zero-phase current transformer, 4 is the load,
5 and 8 are first and second ground fault detection relays, 5a is a current winding, 6 is a ground voltage instrument transformer,
7 is a resistor, 9 is a circuit breaker, 10 is an electric device (generator), 11 is a grounding resistor, 12 is a contact, and 13 is a capacitor type voltage transformer. Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
れた電気機器、もしくは、上記母線に接続され中
性点が接地された計器用変圧器を有した電気系統
において、上記母線に接続された負荷の地絡時に
地絡電流を導出する零相変流器と、この零相変流
器の２次側に接続され所定電流値で動作する第１
の地絡検出継電器と、上記零相変流器の２次側に
接続され、上記第１の地絡検出継電器の動作電流
値よりも大きい電流値で動作する第２の地絡検出
継電器と、この第２の地絡検出継電器の動作にと
もなつて閉成され、上記第１の地絡検出継電器の
入力回路を短絡する接点とを備えたことを特徴と
する地絡検出装置。 Electrical equipment connected to the bus bar through a circuit breaker and whose neutral point is grounded, or in an electrical system that has a voltage transformer connected to the bus bar and whose neutral point is grounded, is connected to the bus bar. A zero-phase current transformer that derives a ground fault current when a load has a ground fault, and a first transformer that is connected to the secondary side of this zero-phase current transformer and operates at a predetermined current value.
a second ground fault detection relay that is connected to the secondary side of the zero-phase current transformer and operates at a current value larger than the operating current value of the first ground fault detection relay; A ground fault detection device comprising: a contact that is closed upon operation of the second ground fault detection relay and short-circuits an input circuit of the first ground fault detection relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8610788U JPH0210738U (en) | 1988-06-28 | 1988-06-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8610788U JPH0210738U (en) | 1988-06-28 | 1988-06-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0210738U true JPH0210738U (en) | 1990-01-23 |
Family
ID=31310751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8610788U Pending JPH0210738U (en) | 1988-06-28 | 1988-06-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0210738U (en) |
-
1988
- 1988-06-28 JP JP8610788U patent/JPH0210738U/ja active Pending
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