RU2010141821A

RU2010141821A - VOLTAGE PROTECTION CIRCUIT AND POWER SUPPLY SYSTEM

Info

Publication number: RU2010141821A
Application number: RU2010141821/07A
Authority: RU
Inventors: Такео ОХКИДО (JP); Такео ОХКИДО; Масафуми ХАСИМОТО (JP); Масафуми ХАСИМОТО
Original assignee: Дайкин Индастриз, Лтд. (Jp); Дайкин Индастриз, Лтд.
Priority date: 2008-03-13
Filing date: 2009-03-11
Publication date: 2012-04-20
Also published as: WO2009113570A1; BRPI0907510B1; RU2460189C2; JP2009247201A; CN101926068B; CN101926068A; BRPI0907510A2

Abstract

1. Схема (10) защиты от перенапряжений, содержащая: ! второе реле (140), передающее питание из источника (12) питания на первую схему (100) управления, управляющую возбуждением первого реле (14), при получении питания от источника питания, ! первое реле, передающее питание из источника питания на первую нагрузку (16); ! схему (22) детектирования перенапряжения, детектирующую перенапряжение источника питания; и ! блок (24) возбуждения реле, побуждающий второе реле выполнять операцию прерывания при детектировании перенапряжения. ! 2. Схема по п.1, в которой первое реле (14) включает в себя: ! катушку (14a) реле, предусмотренную в первой схеме (100) управления и питаемую через второе реле (140); и ! нормально разомкнутый контакт (14b) реле, размещенный между источником (12) питания и первой нагрузкой (16). ! 3. Схема (10) по п.1 или 2, в которой первая схема (100) управления имеет меньшую величину потребления мощности, чем первая нагрузка (16). ! 4. Схема по п.2, дополнительно содержащая ! нормально разомкнутое четвертое реле (240), предусмотренное между источником (12) питания и второй схемой (200) управления, причем вторая схема управления управляет возбуждением нормально разомкнутого третьего реле (212), передающего питание из источника питания на вторую нагрузку (18), при получении питания от источника питания, при этом: ! второе реле (140) и четвертое реле работают от общей катушки (140a) реле; и ! блок (24) возбуждения реле управляет подачей питания на упомянутую катушку реле. ! 5. Схема по п.1 или 2, дополнительно содержащая управляемый источник (26) питания, преобразующий напряжение и ток источника (12) питания в предопределенные состояния для подачи питания на схему (22) детек� 1. Surge protection circuit (10), containing: ! a second relay (140) transmitting power from the power source (12) to the first control circuit (100) controlling the excitation of the first relay (14) upon receiving power from the power source, ! a first relay transmitting power from the power source to the first load (16); ! an overvoltage detection circuit (22) detecting overvoltage of the power supply; And ! a relay driving unit (24) causing the second relay to perform an interrupt operation when an overvoltage is detected. ! 2. The circuit according to claim 1, in which the first relay (14) includes: ! a relay coil (14a) provided in the first control circuit (100) and powered through the second relay (140); And ! a normally open relay contact (14b) placed between the power source (12) and the first load (16). ! 3. Circuit (10) according to claim 1 or 2, in which the first control circuit (100) has a lower power consumption value than the first load (16). ! 4. The scheme according to claim 2, additionally containing ! a normally open fourth relay (240) provided between the power supply (12) and the second control circuit (200), the second control circuit controlling the excitation of a normally open third relay (212) transmitting power from the power source to the second load (18), at receiving power from the power source, while: ! the second relay (140) and the fourth relay operate from a common relay coil (140a); And ! the relay drive unit (24) controls the supply of power to said relay coil. ! 5. The circuit according to claim 1 or 2, additionally containing a controlled power source (26), converting the voltage and current of the power source (12) into predetermined states to supply power to the detector circuit (22).

Claims

1. An overvoltage protection circuit (10) comprising:

a second relay (140) that transfers power from the power source (12) to the first control circuit (100) that controls the excitation of the first relay (14) when receiving power from the power source,

the first relay that transfers power from the power source to the first load (16);

an overvoltage detection circuit (22) detecting an overvoltage of a power source; and

a relay excitation unit (24) causing the second relay to perform an interrupt operation when detecting an overvoltage.

2. The circuit according to claim 1, in which the first relay (14) includes:

a relay coil (14a) provided in the first control circuit (100) and fed through a second relay (140); and

normally open contact (14b) of the relay located between the power source (12) and the first load (16).

3. The circuit (10) according to claim 1 or 2, in which the first control circuit (100) has a lower power consumption value than the first load (16).

4. The circuit according to claim 2, further comprising

the normally open fourth relay (240) provided between the power source (12) and the second control circuit (200), the second control circuit controlling the excitation of the normally open third relay (212), which transfers power from the power source to the second load (18), when receiving power from a power source, while:

a second relay (140) and a fourth relay operate from a common relay coil (140a); and

a relay excitation unit (24) controls the supply of power to said relay coil.

5. The circuit according to claim 1 or 2, further comprising a controlled power source (26) that converts the voltage and current of the power source (12) to predetermined states for supplying power to the overvoltage detection circuit (22) and the relay excitation unit (24).

6. A power supply system comprising:

circuit (10) surge protection according to claim 1 or 2;

power source (12);

first relay (14); and

the first control circuit (100).