JPH0176142U - - Google Patents
Info
- Publication number
- JPH0176142U JPH0176142U JP1987170615U JP17061587U JPH0176142U JP H0176142 U JPH0176142 U JP H0176142U JP 1987170615 U JP1987170615 U JP 1987170615U JP 17061587 U JP17061587 U JP 17061587U JP H0176142 U JPH0176142 U JP H0176142U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- shift
- phase
- alternating current
- output
- 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
- Measurement Of Current Or Voltage (AREA)
- Emergency Protection Circuit Devices (AREA)
- Manipulation Of Pulses (AREA)
Description
第１図は本考案の回路構成の一実施例を示す回
路図、第２図はその動作説明のための波形図、第
３図は従来の方形波の常時監視回路の回路図、第
４図及び第５図はそのタイマの動作説明図、第６
図は第３図の回路の動作説明のための波形図、第
７図は従来の３相交流電源常時監視回路の回路図
、第８図及び第９図はその１相不良時の動作説明
のための波形図である。
１２…ＯＲ回路、１３，１４，１５…シフトレ
ジスタ、１６…発振回路、１７…ＮＯＲ回路、１
８…ＡＮＤ回路。なお、各図中同一符号は同一又
は相当部分を示す。
Fig. 1 is a circuit diagram showing an embodiment of the circuit configuration of the present invention, Fig. 2 is a waveform diagram for explaining its operation, Fig. 3 is a circuit diagram of a conventional square wave constant monitoring circuit, and Fig. 4 and Fig. 5 is an explanatory diagram of the operation of the timer, Fig. 6
The figure is a waveform diagram for explaining the operation of the circuit in Figure 3, Figure 7 is a circuit diagram of a conventional three-phase AC power supply constant monitoring circuit, and Figures 8 and 9 are for explaining the operation when one phase fails. FIG. 12...OR circuit, 13, 14, 15...shift register, 16...oscillation circuit, 17...NOR circuit, 1
8...AND circuit. Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
入力とするＯＲ回路と、 シフトクロツクを供給する発振回路と、 前記各方形波信号の前縁に同期して前記シフト
クロツクによるシフトを開始して所定のシフト数
にてハイレベル信号を出力すると共に、前記各方
形波の後縁に同期してリセツトされる３つのシフ
トレジスタと、 前記各シフトレジスタの出力信号を入力とする
ＮＯＲ回路と、 前記ＯＲ回路の出力信号とＮＯＲ回路の出力信
号とを入力とするＡＮＤ回路とを備え、 該ＡＮＤ回路の出力レベルにより前記３相交流
の状態を監視すべくなしたことを特徴とする３相
交流電源常時監視回路。[Claims for Utility Model Registration] An OR circuit that receives three square wave signals corresponding to each phase of a three-phase alternating current; an oscillation circuit that supplies a shift clock; Starting the shift by the shift clock and outputting a high level signal at a predetermined number of shifts, three shift registers that are reset in synchronization with the trailing edge of each of the square waves, and output signals of each of the shift registers. The present invention includes a NOR circuit as an input, and an AND circuit as an input, an output signal of the OR circuit and an output signal of the NOR circuit, and the state of the three-phase alternating current is monitored based on the output level of the AND circuit. A 3-phase AC power supply constant monitoring circuit featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987170615U JPH0176142U (en) | 1987-11-06 | 1987-11-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987170615U JPH0176142U (en) | 1987-11-06 | 1987-11-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0176142U true JPH0176142U (en) | 1989-05-23 |
Family
ID=31461714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987170615U Pending JPH0176142U (en) | 1987-11-06 | 1987-11-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0176142U (en) |
-
1987
- 1987-11-06 JP JP1987170615U patent/JPH0176142U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5557181A (en) | Electronic watch | |
| JPS532060A (en) | High harmonic generator | |
| JPH0191334U (en) | ||
| JPH0478572U (en) | ||
| JPH0299370U (en) | ||
| JPS6262334U (en) | ||
| JPS61199196U (en) | ||
| FR2405588A1 (en) | Signal phase comparator circuit - uses beats between natural and phase modulated input signals to determine frequency stability | |
| JPS6234800U (en) | ||
| JPS6210680U (en) | ||
| JPS62191231U (en) | ||
| JPH0322431U (en) | ||
| JPS61166629U (en) | ||
| JPH036719U (en) | ||
| JPS6074064U (en) | Frequency abnormality detection device | |
| JPS6452029U (en) | ||
| JPS60120368U (en) | Power frequency detection circuit | |
| JPH0255969U (en) | ||
| JPS62158937U (en) | ||
| JPS62146915U (en) | ||
| JPS63498U (en) | ||
| JPH01156470U (en) | ||
| JPS62110315A (en) | Pulse generation circuit | |
| JPH0164939U (en) | ||
| JPS63153626U (en) |