发明名称 |
Overvoltage protection device |
摘要 |
An overvoltage protection device, for protecting communications equipment against hazardous voltages cue to lightning or power surges, comprises a primary protector, for example a gas tube device, and a back-up protector connected in parallel. The back-up protector includes a semiconductor pn junction, and is preferably a pair of diodes back-to-back. The back-up protector has a breakdown voltage slightly higher than that of the primary protector and is arranged to fail short-circuit once it has operated so as to provide an indication that the primary protector failed to operate.
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申请公布号 |
US4544983(A) |
申请公布日期 |
1985.10.01 |
申请号 |
US19830489336 |
申请日期 |
1983.04.28 |
申请人 |
NORTHERN TELECOM LIMITED |
发明人 |
ANDERSON, JAMES E.;COLEMAN, MICHAEL J.;LIVERMORE, FREDERICK C. |
分类号 |
H02H9/06;(IPC1-7):H02H9/06 |
主分类号 |
H02H9/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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