| 摘要 |
The cable system carries one or more insulated conductors completely enclosed within a shield having one end connected to ground. A lightning-protector network connects the other end of the shield to ground. The protector network is normally open circuited and becomes only short circuited in response to a momentary abnormal surge voltage induced in the shield. The protector network's open-to-short impedance change completes a conductive circuit path between the shield and the two grounded ends for conducting a shield current which has the desired effect of protecting the signal-carrying conductors in the cable from the large-surge voltage.
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