JPS6434130A - Ground-fault relay device - Google Patents
Ground-fault relay deviceInfo
- Publication number
- JPS6434130A JPS6434130A JP19095487A JP19095487A JPS6434130A JP S6434130 A JPS6434130 A JP S6434130A JP 19095487 A JP19095487 A JP 19095487A JP 19095487 A JP19095487 A JP 19095487A JP S6434130 A JPS6434130 A JP S6434130A
- Authority
- JP
- Japan
- Prior art keywords
- relay
- current
- ground
- load current
- abruptly increases
- 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.)
- Granted
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE:To eliminate an erroneous operation of a ground-fault relay when a load current abruptly increases by detecting the amplitude of the current, and providing means for disabling the relay of the ground-fault relay when the detected value abruptly increases. CONSTITUTION:Current transformers CT1-CT3 are respectively provided in 3 phases, the output terminals are connected to detect a zero-phase current. when the zero-phase current becomes a set value or more, the relay Ry of a groundfault relay GR is operated. On the other hand, the amplitude of the load current is detected from one of the CT1-CT3, and input to a holding circuit HS. When the circuit HS detects the abrupt increase of the load current, the relay Ry is deenergized irrespective of the output signal of the GR. Thus, even if the GR erroneously judges when the load current abruptly increases, the relay Ry is disabled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62190954A JPH0638690B2 (en) | 1987-07-30 | 1987-07-30 | Ground fault relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62190954A JPH0638690B2 (en) | 1987-07-30 | 1987-07-30 | Ground fault relay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6434130A true JPS6434130A (en) | 1989-02-03 |
| JPH0638690B2 JPH0638690B2 (en) | 1994-05-18 |
Family
ID=16266441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62190954A Expired - Lifetime JPH0638690B2 (en) | 1987-07-30 | 1987-07-30 | Ground fault relay |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0638690B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759682A (en) * | 2012-08-02 | 2012-10-31 | 河南易安能源科技有限公司 | Judgment method of small current system one-phase ground circuit and one-phase ground indicator |
| JP2022043788A (en) * | 2020-09-04 | 2022-03-16 | 日本テクノ株式会社 | Insulation status grasp and cutoff operation prediction device based on three-phase AC zero-phase current |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS496431A (en) * | 1972-05-10 | 1974-01-21 |
-
1987
- 1987-07-30 JP JP62190954A patent/JPH0638690B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS496431A (en) * | 1972-05-10 | 1974-01-21 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759682A (en) * | 2012-08-02 | 2012-10-31 | 河南易安能源科技有限公司 | Judgment method of small current system one-phase ground circuit and one-phase ground indicator |
| CN102759682B (en) * | 2012-08-02 | 2016-04-13 | 河南易安能源科技有限公司 | The determination methods of small current system single-phase earthing circuit and single-phase earthing indicator |
| JP2022043788A (en) * | 2020-09-04 | 2022-03-16 | 日本テクノ株式会社 | Insulation status grasp and cutoff operation prediction device based on three-phase AC zero-phase current |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0638690B2 (en) | 1994-05-18 |
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