JPH0488478U - - Google Patents
Info
- Publication number
- JPH0488478U JPH0488478U JP40381590U JP40381590U JPH0488478U JP H0488478 U JPH0488478 U JP H0488478U JP 40381590 U JP40381590 U JP 40381590U JP 40381590 U JP40381590 U JP 40381590U JP H0488478 U JPH0488478 U JP H0488478U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- detection means
- closing
- ground fault
- opening
- 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 5
- 238000010586 diagram Methods 0.000 description 5
- 238000009499 grossing Methods 0.000 description 1
Landscapes
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Load-Engaging Elements For Cranes (AREA)
Description
第1図はこの考案の一実施例による駆動制御装
置を示す回路図、第2図及び第3図はこの考案の
一実施例による駆動制御装置の動作を示す動作説
明用線図、第4図はこの考案の他の実施例を示す
回路図、第5図は従来の駆動制御装置を示す回路
図、第6図は従来の地絡保護装置を示す回路図で
ある。
図において、1はコンバータ整流回路、2は商
用交流電源、3はコンバータ平滑回路、4はイン
バータ、7は開閉器、8は開閉シーケンス手段、
9は地絡電流制限抵抗、10は地絡検出器、11
はコンタクタ、12はコンタクタ開閉手段である
。なお、図中同一符号は同一、または相当部分を
示す。
FIG. 1 is a circuit diagram showing a drive control device according to an embodiment of this invention, FIGS. 2 and 3 are diagrams for explaining the operation of the drive control device according to an embodiment of this invention, and FIG. 5 is a circuit diagram showing another embodiment of this invention, FIG. 5 is a circuit diagram showing a conventional drive control device, and FIG. 6 is a circuit diagram showing a conventional ground fault protection device. In the figure, 1 is a converter rectifier circuit, 2 is a commercial AC power supply, 3 is a converter smoothing circuit, 4 is an inverter, 7 is a switch, 8 is an opening/closing sequence means,
9 is a ground fault current limiting resistor, 10 is a ground fault detector, 11
1 is a contactor, and 12 is a contactor opening/closing means. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
ータと、該コンバータから出力される直流電圧を
交流電圧に変換するインバータとを備えた駆動制
御装置において、上記交流電源とコンバータ間に
挿入された第1の開閉手段と、上記コンバータの
正負出力側母線のどちらか一方に挿入された第2
の開閉手段と、上記正負出力側母線の少なくとも
どちらか一方に挿入された抵抗器と、上記正負出
力側母線間の電圧を検出する検出手段と、該検出
手段の出力電圧が基準電圧を上回つた時に信号を
出力する地絡検出手段と、該地絡検出手段の出力
信号により上記第1の開閉手段を開成する第1の
開閉制御手段と、上記第1の開閉手段の閉成開始
から所定時間経過した後上記第2の開閉手段を閉
成する第2の開閉制御手段とを備えたことを特徴
とする駆動制御装置。 In a drive control device including a converter connected to an AC power source and outputting a DC voltage, and an inverter converting the DC voltage output from the converter into an AC voltage, a first a second opening/closing means inserted into either one of the positive and negative output side busbars of the converter;
a resistor inserted into at least one of the positive and negative output side buses, a detection means for detecting the voltage between the positive and negative output side buses, and an output voltage of the detection means exceeding a reference voltage. a ground fault detection means that outputs a signal when the ground fault detection means opens the first switching means based on the output signal of the ground fault detection means; A drive control device comprising: second opening/closing control means for closing the second opening/closing means after a lapse of time.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP40381590U JPH0488478U (en) | 1990-12-20 | 1990-12-20 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP40381590U JPH0488478U (en) | 1990-12-20 | 1990-12-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0488478U true JPH0488478U (en) | 1992-07-31 |
Family
ID=31881535
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP40381590U Pending JPH0488478U (en) | 1990-12-20 | 1990-12-20 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0488478U (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2018150719A (en) * | 2017-03-13 | 2018-09-27 | 日本基礎技術株式会社 | Holder for anchor tendon and anchor construction method |
JP7334022B1 (en) * | 2023-05-11 | 2023-08-28 | オリエンタル白石株式会社 | PC steel lifting jig |
-
1990
- 1990-12-20 JP JP40381590U patent/JPH0488478U/ja active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2018150719A (en) * | 2017-03-13 | 2018-09-27 | 日本基礎技術株式会社 | Holder for anchor tendon and anchor construction method |
JP7334022B1 (en) * | 2023-05-11 | 2023-08-28 | オリエンタル白石株式会社 | PC steel lifting jig |