JPH0249333U - - Google Patents
Info
- Publication number
- JPH0249333U JPH0249333U JP12631988U JP12631988U JPH0249333U JP H0249333 U JPH0249333 U JP H0249333U JP 12631988 U JP12631988 U JP 12631988U JP 12631988 U JP12631988 U JP 12631988U JP H0249333 U JPH0249333 U JP H0249333U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- circuit
- voltage
- relay
- coil
- 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Television Receiver Circuits (AREA)
- Protection Of Static Devices (AREA)
- Rectifiers (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は従来の電源回路の一例を示す回路図である。
１……待機用電源、６……電源リレー、７……
リレードライブトランジスタ、８……主電源回路
、２１，２３……トランジスタ、２４……デイレ
ー回路、２５……電圧供給回路、２８……ツエナ
ーダイオード。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a circuit diagram showing an example of a conventional power supply circuit. 1...Standby power supply, 6...Power relay, 7...
Relay drive transistor, 8... Main power supply circuit, 21, 23... Transistor, 24... Delay circuit, 25... Voltage supply circuit, 28... Zener diode.
Claims (1)
る待機用電源と、 前記第１の負荷回路の動作時に、この第１の負
荷回路からのオン指令信号によりオン制御される
電源リレーと、 交流入力端から前記電源リレーの接点を介して
導かれる交流電圧を直流電圧に変換し第２の負荷
回路に供給する主電源回路とを有する電源回路に
おいて、 前記電源リレーのコイルと待機用電源の直流側
とを結ぶ電路に介挿され、該待機用電源の出力に
よりオス制御されるスイツチング素子と、 前記第１の負荷回路から前記オン指令信号が供
給されてから所定時間経過後は、前記スイツチン
グ素子に供給されるオン制御信号を無効にする遅
延回路と、 前記電源リレーのコイルと主電源回路の直流出
力端とを結ぶ電路に介挿され、該主電源回路の直
流出力電圧が所定電圧以上のときにのみ該電圧を
前記電源リレーのコイルに供給する電圧供給回路
とを備えたことを特徴とする電源保護回路。[Claims for Utility Model Registration] A standby power source that is rectified and supplied to a first load circuit when alternating current is input; and a standby power source that is turned on by an on command signal from the first load circuit when the first load circuit is operated A power supply circuit comprising: a controlled power supply relay; and a main power supply circuit that converts an AC voltage led from an AC input terminal through contacts of the power supply relay into a DC voltage and supplies the DC voltage to a second load circuit, the power supply relay comprising: a switching element that is inserted in an electric path connecting the coil and the DC side of the standby power supply and is male-controlled by the output of the standby power supply; After a period of time has elapsed, a delay circuit that disables the ON control signal supplied to the switching element is inserted into an electric path connecting the coil of the power relay and the DC output end of the main power circuit, A power supply protection circuit comprising: a voltage supply circuit that supplies a DC output voltage to a coil of the power supply relay only when the voltage is equal to or higher than a predetermined voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12631988U JPH0249333U (en) | 1988-09-29 | 1988-09-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12631988U JPH0249333U (en) | 1988-09-29 | 1988-09-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0249333U true JPH0249333U (en) | 1990-04-05 |
Family
ID=31377740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12631988U Pending JPH0249333U (en) | 1988-09-29 | 1988-09-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0249333U (en) |
-
1988
- 1988-09-29 JP JP12631988U patent/JPH0249333U/ja active Pending