专利名称：Protection circuit for dual voltage electrical
distribution system
发明人：Toth, James申请号：EP05101835.6申请日：20050309公开号：EP1577997A2公开日：20050921
专利附图：
摘要：An electrical overvoltage protection circuit (60) in a dual voltage electricaldistribution system (10) such as a motor vehicle includes a PTC device (80) in seriesbetween a low voltage source (46) and a low voltage distribution wire (72), and also a
voltage limiting circuit element (82) such as a zener diode in thermal contact with the PTCdevice and connected across the low voltage distribution wire and a common electricalreturn path. The voltage limit is set to be below a high voltage and above the lowvoltage. When the low voltage distribution wire becomes cross-connected to a highvoltage distribution wire (32), the voltage limiting circuit element conducts a large currentand generates heat which is transferred to the PTC device which thereupon trips andlimits current flow from the low voltage source to the high voltage load (42) via thecross-connected low voltage and high voltage distribution wires.
申请人：TYCO Electronics Corporation
地址：2901 Fulling Mill Road Middletown, Pennsylvania 17057 US
国籍：US
代理机构：Johnstone, Douglas Ian
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