JPH03106837U - - Google Patents
Info
- Publication number
- JPH03106837U JPH03106837U JP1346790U JP1346790U JPH03106837U JP H03106837 U JPH03106837 U JP H03106837U JP 1346790 U JP1346790 U JP 1346790U JP 1346790 U JP1346790 U JP 1346790U JP H03106837 U JPH03106837 U JP H03106837U
- Authority
- JP
- Japan
- Prior art keywords
- phase
- detection means
- load input
- input circuit
- signal
- 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 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 2
- 230000018199 S phase Effects 0.000 claims 1
- 230000001681 protective effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
第１図は本考案の一実施例を示す三相電源の負
荷保護装置の電気回路図、第２図は同実施例に基
づく動作説明図である。
図中、１……負荷、２……信号生成回路、３，
４……ホトカプラ、５……逆相検出手段（フリツ
プフロツプ）、６……リレー制御手段、７……マ
イコン、８……リレー、９……ＡＮＤ回路、１０
……トランジスタ、Ｒ，Ｓ，Ｔ……電力線端子、
Ｒ１〜Ｒ６……抵抗、Ｄ１〜Ｄ２……ダイオード
。
FIG. 1 is an electrical circuit diagram of a load protection device for a three-phase power source showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the operation based on the same embodiment. In the figure, 1...Load, 2...Signal generation circuit, 3,
4... Photocoupler, 5... Reverse phase detection means (flip-flop), 6... Relay control means, 7... Microcomputer, 8... Relay, 9... AND circuit, 10
...Transistor, R, S, T...Power line terminal,
R1-R6...Resistor, D1-D2...Diode.
Claims (1)
ている負荷入力回路の、Ｒ−Ｓ相間電圧により作
動する第１のホトカプラと、Ｒ−Ｔ相間電圧によ
り作動する第２のホトカプラとから成る信号生成
回路と、同信号生成回路より出力される二系統の
出力信号の内、何れか一方の出力信号の立ち上が
り時または立ち下がり時に、他方の出力信号の有
無を検出する逆相検出手段と、同逆相検出手段よ
りの出力信号とマイコンよりの制御信号とを基に
前記負荷入力回路に設けられているリレーを制御
するリレー制御手段とから成ることを特徴とする
三相電源の負荷保護装置。 A first photocoupler operated by an R-S phase voltage, and a second photocoupler operated by an R-T phase voltage, of a load input circuit coupled to a three-phase power supply consisting of an R phase, an S phase, and a T phase. and a negative phase detection means for detecting the presence or absence of the other output signal when one of the two output signals output from the signal generation circuit rises or falls. and a relay control means for controlling a relay provided in the load input circuit based on an output signal from the opposite phase detection means and a control signal from a microcomputer. Protective device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1346790U JPH03106837U (en) | 1990-02-14 | 1990-02-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1346790U JPH03106837U (en) | 1990-02-14 | 1990-02-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03106837U true JPH03106837U (en) | 1991-11-05 |
Family
ID=31516881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1346790U Pending JPH03106837U (en) | 1990-02-14 | 1990-02-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03106837U (en) |
-
1990
- 1990-02-14 JP JP1346790U patent/JPH03106837U/ja active Pending