JPS5485365A - Protector for on-load tap changer - Google Patents
Protector for on-load tap changerInfo
- Publication number
- JPS5485365A JPS5485365A JP15383477A JP15383477A JPS5485365A JP S5485365 A JPS5485365 A JP S5485365A JP 15383477 A JP15383477 A JP 15383477A JP 15383477 A JP15383477 A JP 15383477A JP S5485365 A JPS5485365 A JP S5485365A
- Authority
- JP
- Japan
- Prior art keywords
- transformer
- current
- circuit
- bulb
- energized
- 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
Landscapes
- Protection Of Transformers (AREA)
Abstract
PURPOSE: To protect a transformer from the trouble in a circuit breaker, by providing current transformers to detect the currents flowing through two adjacent taps of tap windings coupled to vacuum bulbs and by detecting an abnormal current or an abnormal energizing time period to trip the transformer.
CONSTITUTION: When the taps are completely short-circuited to each other due to the trouble in the bulb V1 or V2, the short-circuit is detected by the current transformer CT1 or CT2. At that time, an overcurrent relay H1 or H2 is energized and an auxiliary relay X1 operates to trip the transformer to protect it. When the bulb V3 develops a trouble, overcurrent relays L1, L2 are operated by the sort-circuit current of the bulb. Simultaneously, overcurrent relay contacts L1', L2' are closed and a timer T is energized. If the current remains flowing after the set time t of the timer T, an auxiliary contact T' is closed and an auxiliary relay X2 is energized to close an auxiliary contact X2', which constitutes the trip circuit for the transformer. Thereby, the transformer is protected by simple circuits from all troubles.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15383477A JPS5485365A (en) | 1977-12-21 | 1977-12-21 | Protector for on-load tap changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15383477A JPS5485365A (en) | 1977-12-21 | 1977-12-21 | Protector for on-load tap changer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5485365A true JPS5485365A (en) | 1979-07-06 |
Family
ID=15571102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15383477A Pending JPS5485365A (en) | 1977-12-21 | 1977-12-21 | Protector for on-load tap changer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5485365A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5788711A (en) * | 1980-11-21 | 1982-06-02 | Toshiba Corp | On-load tap changer |
| JPS61192634U (en) * | 1985-05-22 | 1986-11-29 |
-
1977
- 1977-12-21 JP JP15383477A patent/JPS5485365A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5788711A (en) * | 1980-11-21 | 1982-06-02 | Toshiba Corp | On-load tap changer |
| JPS61192634U (en) * | 1985-05-22 | 1986-11-29 |
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