JPH0249329U - - Google Patents
Info
- Publication number
- JPH0249329U JPH0249329U JP12572888U JP12572888U JPH0249329U JP H0249329 U JPH0249329 U JP H0249329U JP 12572888 U JP12572888 U JP 12572888U JP 12572888 U JP12572888 U JP 12572888U JP H0249329 U JPH0249329 U JP H0249329U
- Authority
- JP
- Japan
- Prior art keywords
- ground fault
- fault detection
- motor
- detection device
- vary
- 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 5
- 238000010586 diagram Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Protection Of Generators And Motors (AREA)
- Protection Of Static Devices (AREA)
Description
第１図は本考案による地絡故障検出装置を説明
するための一実施例の構成図、第２図は他の実施
例の構成図、第３図は更に他の実施例の構成図、
第４図は更に他の実施例の構成図、第５図は従来
方式を説明する図、第６図は従来方式の他の例を
説明する図である。
１……しや断器、２……ＶＶＶＦ電源系統、３
……出力変圧器、４……設置用変圧器、５……タ
ツプ付き抵抗器、６……電動機、７……回転数検
出装置、８……タツプ切換装置、９……地絡故障
時しや断器引きはずし装置。
FIG. 1 is a configuration diagram of one embodiment for explaining the ground fault detection device according to the present invention, FIG. 2 is a configuration diagram of another embodiment, and FIG. 3 is a configuration diagram of still another embodiment.
FIG. 4 is a block diagram of still another embodiment, FIG. 5 is a diagram for explaining a conventional system, and FIG. 6 is a diagram for explaining another example of the conventional system. 1...Shiya disconnector, 2...VVVF power supply system, 3
... Output transformer, 4 ... Installation transformer, 5 ... Resistor with tap, 6 ... Motor, 7 ... Rotation speed detection device, 8 ... Tap switching device, 9 ... Ground fault failure or disconnection trip device.
Claims (1)
障検出方式において、地絡検出設定値は電動機の
回転数に反比例して変化するよう設定することを
特徴とする地絡故障検出装置。 What is claimed is: 1. A ground fault detection device for a ground fault detection system for a motor controlled by variable voltage and variable frequency, characterized in that a ground fault detection setting value is set to vary in inverse proportion to the rotational speed of the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12572888U JPH0249329U (en) | 1988-09-28 | 1988-09-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12572888U JPH0249329U (en) | 1988-09-28 | 1988-09-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0249329U true JPH0249329U (en) | 1990-04-05 |
Family
ID=31376592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12572888U Pending JPH0249329U (en) | 1988-09-28 | 1988-09-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0249329U (en) |
-
1988
- 1988-09-28 JP JP12572888U patent/JPH0249329U/ja active Pending