CN1061772C - 一种大电流电路的断开用的电路断路器 - Google Patents

一种大电流电路的断开用的电路断路器 Download PDF

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CN1061772C
CN1061772C CN95121749A CN95121749A CN1061772C CN 1061772 C CN1061772 C CN 1061772C CN 95121749 A CN95121749 A CN 95121749A CN 95121749 A CN95121749 A CN 95121749A CN 1061772 C CN1061772 C CN 1061772C
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solenoid
circuit
closing
circuit breaker
closing spring
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CN1131805A (zh
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P·H·辛格
J·A·波曼
小·G·R·里巴
D·L·艾利森
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General Electric Co
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General Electric Co
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
    • H02H7/222—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for switches
    • H02H7/224—Anti-pump circuits

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  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

一种遥控闭合操作器置于一电路断路器壳体中，使电路断路器操作机构遥控操作，闭合所述电路断路顺的触点。闭合螺线管和相关的逻辑电路控制触点闭合弹簧的状态。螺线管被激励，释放触点闭合弹簧，在触点闭合后，防止释放触点闭合弹簧的操作。

Description

一种大电流电路的断开用的电路断路器
U．S．专利4，001，742(名称为“具有改进的操作机构的电路断路器”)描述了一种电路断路器，它能中断几百伏电压的几百安培电路电流。如其中所述，操作机构控制有源的操作弹簧去打开和关闭电路断路器的触点。一旦操作机构要分开触点，操作弹簧必须要能对载有触点的可移动触点臂提供足够的移动力。
在操作电路断路器远离电路断路器的情况下，用保持螺线管、闭合螺线管、低压释放辅助设备等装置释放电路断路器触点闭合弹簧。这种装置可见US专利4，301，433、4，166，989和4，301，434。然而，在这种遥控闭合装置等大电流电路断路器中使用的有源触点闭合弹簧不能既释放闭合触点弹簧，又在触点闭合弹簧释放后重复起动遥控闭合螺线管时保护螺线管不损坏。电路断路器闭合弹簧的遥控操作的另一个问题是在触点分开后试图再闭合电路断路器触点时，闭合弹簧没有充分加载，导致闭合弹簧的有害的“往复运动”，这可能损坏螺线管以及触点。
U．S．专利申请号08／323，305(发明名称为“电路断路器遥控闭合操作器”，申请日为1994年10月11日)描述了一种结构，以一对第一、第二螺线管与一对相应的限制开关相互作用，防止往复运动以及防止螺线管在闭合弹簧的中间操作中过热。
采用双螺线管和双限制开关增加了成本，由于机械螺线管和限制开关的相互作用，降低了遥控闭合开关的速度。
在U．S．专利4，642，726中，以分立的电子电路元件与三个开关连接，用闭合螺线管控制螺线管的操作。
本发明的一个目的是提供一种遥控电路断路器触点闭合弹簧操作器，它能迅速地闭合电路断路器触点，不需要附加螺线管和附加开关，能防止触点闭合弹簧的往复运动，也不增加电子电路元件的成本。
本发明提供了一种大电流电路的断开用的电路断路器，包括：绝缘基座和所述基座上方的一个绝缘盖，所述盖盖住一个闭合轴和从操作机构侧框延伸出的一个闭合弹簧；与所述闭合弹簧相互作用的闭合螺线管，用以释放所述闭合弹簧和使所述闭合弹簧转动所述闭合轴；与所述螺线管及一个操作电源串联连接的逻辑电路，所述逻辑电路包括由一个电容和一个电阻串联组成的RC电路，用于在足够的时间周期内对所述螺线管提供所述操作电源，以释放所述闭合弹簧，且不会使所述螺线管过热，所述RC电路的时间常数用于控制与螺线管串联的电子开关的闭合时间。
遥控闭合操作器置于电路断路器外壳中，使得电路断路器操作机构的遥控操作能闭合电路断路器触点。一个简单的逻辑电路控制闭合螺线管的操作，防止在触点闭合以后触点闭合弹簧松开的可能。
图1是大电流电路断路器的顶视图，电路断路器的盖子已除下，示出本发明的遥控触点闭合操作器的轮廓。
图2是图1的遥控触点闭合操作器的逻辑电路的示意图。
图1示出的大电流电路断路器能够传送几百伏几千安培的静态电路电流。该电路断路器的构成为，一电绝缘基座11，一在顶盖13盖上之前盖到基座11的、由类似绝缘材料制成的中间盖12，顶盖13也由电绝缘材料制成。从基座的一侧延伸的负载端子板19和从另一侧延伸的电源端子板(未示出)实现内部电流承载元件的电连接。这些内部元件由一电子断路单元控制，电子断路单元包含在顶盖13的上表面的凹槽14中。电路单元与U．S．专利4，658，323类似，并与辅助槽15中的辅助装置相互作用，提供(例如)U．S．专利4，801，907描述的保护范围和控制功能。U．S．专利5，486，667的操作机构包括一闭合轴25，它提供了所要求的对有源操作机构触点闭合弹簧20加载的力。操作手柄16可进行电路断路器操作机构的手动操作，还可为触点闭合弹簧提供手动手段。操作机构元件固定到操作机构侧框21上，闭合轴25以上述几个U．S．专利中描述的方式通过该侧框延伸。借助于打开按钮18打开电路断路触点，凹槽18A下的OPEN指示标记是可视的；借助于闭合按钮17闭合电路断路触点，凹槽17A下的CLOSE指示标记是可视的。根据本发明，一遥控触点闭合弹簧组件24固定到侧框21，与一激励片22相互作用，激励片22通过侧框21中的槽23，按前述U．S．专利5，486，667相同的方式与闭合按钮17互连。闭合螺线管26响应一遥控信号，转动杆27，压缩回复弹簧33，驱动杆27上的立柱28，顶住激励片22，释放闭合弹簧20，转动闭合轴25，从而闭合电路断路器触点。本发明的印刷电路板29上装有图2所示的逻辑电路30，防止螺线管过热，避免闭合弹簧的往复运动，并以如下方式操作。
一旦控制电源加到输入端31，经过二极管1-4整流，从输出端32加到螺线管上。电阻R1和齐纳二极管Z1共同把起动电压加到储能电容C1。经电阻R2加到FET Q1的基极的基极驱动电压导通FET使电流经输出端32流到螺线管。只要C1上的电压充到全值(这取决于C1和R1的时间常数值)，基极驱动电阻R2上的电压就降到零，截止FET，中断流向螺线管的电流。然后，电容C1经电阻R3放电，从而，电路处于接收下一次输入功率的状态下。
选取C1和R1的RC时间常数值，使有足够的起动功率在有限的时间间隔内迅速驱动螺线管，保证螺线管的迅速动作而不发热。
这里描述了一种与螺线管配用的简单控制电路，能迅速驱动螺线管快速操作，中断螺线管的供电，防止过热，避免触点闭合弹簧的往复运动。

Claims (1)

1．一种大电流电路的断开用的电路断路器(10)，包括：
绝缘基座(11)和所述基座上方的一个绝缘盖(12)，所述盖盖住一个闭合轴(25)和从操作机构侧框(21)延伸出的一个闭合弹簧(20)；其特征在于还包括：
与所述闭合弹簧相互作用的闭合螺线管(36)，用以释放所述闭合弹簧和使所述闭合弹簧转动所述闭合轴；
与所述螺线管及一个操作电源串联连接的逻辑电路，所述逻辑电路包括由一个电容(C1)和一个电阻(R1)串联组成的RC电路(C1)，R1)，用于在足够的时间周期内对所述螺线管提供所述操作电源，以释放所述闭合弹簧，且不会使所述螺线管过热，所述RC电路的时间常数用于控制与螺线管串联的电子开关(Q1)的闭合时间。
CN95121749A 1994-12-27 1995-12-27 一种大电流电路的断开用的电路断路器 Expired - Lifetime CN1061772C (zh)

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US08/363,794 US5719738A (en) 1994-12-27 1994-12-27 Circuit breaker remote closing operator
US363,794 1994-12-27

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CA (1) CA2165211C (zh)
FR (1) FR2728723B1 (zh)

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CN1131805A (zh) 1996-09-25
FR2728723B1 (fr) 1999-06-18
FR2728723A1 (fr) 1996-06-28
JP3890091B2 (ja) 2007-03-07
CA2165211A1 (en) 1996-06-28
CA2165211C (en) 2005-04-26
US5719738A (en) 1998-02-17
JPH08298063A (ja) 1996-11-12

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