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公开(公告)号：US5379176A
公开(公告)日：1995-01-03
申请号：US57698
申请日：1993-05-03
摘要： A protective circuit for the input of a multimeter is provided with series connected thermistors partially shunted by a varistor whereby overload voltage is distributed between the thermistors enabling protection at higher voltage levels. Shunt connected varistors protect primarily against transient overloads and are thermally coupled to the aforementioned thermistors to bring the thermistors more rapidly to their high resistance condition such that damage to the varistors is avoided and continued protection is provided.
摘要翻译： 用于输入万用表的保护电路设置有由压敏电阻部分分流的串联连接的热敏电阻，由此过热电压分布在热敏电阻之间，从而能够在较高电压水平下进行保护。 并联连接的压敏电阻主要防止瞬态过载，并且热耦合到上述热敏电阻，以使热敏电阻更快地到达其高电阻状态，从而避免对压敏电阻的损坏并提供持续的保护。
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公开(公告)号：US5379022A
公开(公告)日：1995-01-03
申请号：US57170
申请日：1993-05-03
摘要： A thermistor device includes plural thermistor elements in series, one or more of which is shunted with a varistor so that if such thermistor heats up and drops excessive voltage, the current therethrough is diverted to the varistor until other thermistors in series also heat to a high resistance state. The thermistor and varistor elements are thermally joined so that the various thermistor elements are rapidly brought up to temperature and prevent prolonged voltage drop across a protective varistor.
摘要翻译： 热敏电阻器件包括串联的多个热敏电阻元件，其中一个或多个与变阻器分流，使得如果这种热敏电阻加热并降低过大的电压，则其中的电流被转移到变阻器，直到串联的其它热敏电阻也加热到高 电阻状态。 热敏电阻和压敏电阻元件被热接合，使得各种热敏电阻元件迅速升高到温度并防止保护性变阻器上的延长的电压降。
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