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公开(公告)号：US5689395A
公开(公告)日：1997-11-18
申请号：US564831
申请日：1995-11-29
申请人： Hugh Duffy , Craig Wynn , St. Elmo Nickols, III , Brian Thomas
发明人： Hugh Duffy , Craig Wynn , St. Elmo Nickols, III , Brian Thomas
摘要： An overcurrent protection system which will give a rapid response to relatively small overcurrents. The system, which can be connected between an electrical power supply and an electrical load to form an operating circuit, and which when so connected protects the circuit from overcurrents, has a normal operating condition and a fault condition, and comprises: a circuit interruption element having, (1) a normal state which permits the flow of a normal current, I.sub.NORMAL, when the system is in the normal operating condition, and (2) a fault state which permits the flow of at most a reduced current, substantially less than I.sub.NORMAL, when the system is in the fault condition; and a control element, connected in series with the circuit interruption element, the control element having a variable resistance which (1) is low when the current in the system does not exceed the normal current, I.sub.NORMAL, by a predetermined current amount, and (2) increases by at least a predetermined resistance amount when the current in the system exceeds the normal current, I.sub.NORMAL, by the predetermined current amount; the circuit interruption element changing from its normal state to its fault state, thereby causing the system to change from its normal operating condition to its fault condition, when the resistance of the control element has increased by the predetermined resistance amount.
摘要翻译： 一种过电流保护系统，能够对相对较小的过电流进行快速响应。 可以连接在电源和电负载之间以形成操作电路的系统，以及当连接保护电路免受过电流时的系统具有正常操作条件和故障状况，并且包括：电路中断元件 具有（1）当系统处于正常操作状态时允许正常电流（INORMAL）流动的正常状态，以及（2）允许至多减少电流流动的故障状态，基本上小于 INORMAL，当系统处于故障状态时; 以及与所述电路中断元件串联连接的控制元件，所述控制元件具有可变电阻（1）当系统中的电流不超过正常电流（INORMAL）预定电流量时（1）为低，并且（ 2）当系统中的电流超过正常电流INORMAL预定电流量时，增加至少预定电阻量; 电路中断元件从其正常状态变为其故障状态，从而当控制元件的电阻增加预定电阻量时，使系统从其正常工作状态变为其故障状态。
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公开(公告)号：US6104583A
公开(公告)日：2000-08-15
申请号：US280356
申请日：1999-03-29
申请人： Craig Wynn , St. Elmo Nickols, III
发明人： Craig Wynn , St. Elmo Nickols, III
摘要： An overcurrent protection system containing (1) a current sensing means; (2) a first switch coupled to the current sensing means; (3) a voltage sensing means; (4) a PTC device; and (5) a second switch coupled to the voltage sensing means. In one type of system, the second switch is connected in series with a parallel combination of the first switch and the PTC device; and the voltage sensing means is connected in parallel with a series combination of (i) the second switch and (ii) the parallel combination of the first switch and the PTC device. In another type of system, the first switch, the PTC device and the voltage sensing means are connected in parallel with each other; and the second switch (i) is a switch which latches in the open position and (ii) is connected in series with the parallel combination of the first switch, the PTC device and the voltage sensing means.
摘要翻译： 一种过流保护系统，包括（1）电流检测装置; （2）耦合到电流感测装置的第一开关; （3）电压感测装置; （4）PTC装置; 和（5）耦合到所述电压感测装置的第二开关。 在一种类型的系统中，第二开关与第一开关和PTC装置的并联组合串联连接; 并且电压感测装置与（i）第二开关和（ii）第一开关和PTC装置的并联组合的串联组合并联连接。 在另一种类型的系统中，第一开关，PTC装置和电压感测装置彼此并联连接; 并且第二开关（i）是锁定在打开位置的开关，（ii）与第一开关，PTC装置和电压感测装置的并联组合串联连接。
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公开(公告)号：US5831803A
公开(公告)日：1998-11-03
申请号：US867682
申请日：1997-06-02
申请人： Craig Wynn , St. Elmo Nickols, III
发明人： Craig Wynn , St. Elmo Nickols, III
摘要： A circuit protection system employing arrangements of PTC devices and mechanical switches. The PTC device is not involved in the circuit until a fault is sensed. A current sensing relay senses an overcurrent and directs the current to the PTC device. As the voltage across the PTC device increases, a parallel arrangement of voltage sensing relays completes the operation of the protection system, and disconnects the load until the protection system is reset. The protection system may be reset manually or remotely.
摘要翻译： 采用PTC器件和机械开关的布置的电路保护系统。 在检测到故障之前，PTC设备不会涉及电路。 电流感测继电器检测过电流并将电流引导到PTC器件。 随着PTC器件上的电压增加，电压感测继电器的并联布置完成了保护系统的操作，并断开负载，直到保护系统复位为止。 保护系统可以手动或远程复位。
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