| 摘要 |
The overvoltage protective module comprises a two-terminal overvoltage protective element positioned in a recess of an insulating body. Two conducting strips are held in the bottom of the recess and have flexible ends located one above the other below the second terminal of the element. A grounding plate, secured to a body face, has a hole crossed by the element. A detachable closing cap abuts against the first terminal of the element to drive the element into contact with a flexible end of one conducting strip by combined translation and rotation relative to the grounding plate. To ground test the circuit connected to the upper strip, an end of the upper strip is disconnected from the end of the lower strip and connected to the second terminal of the element when the cap is at an intermediate stationary position of its down stroke. The end of the upper strip is forced against the end of the lower strip by the second terminal of the element at the end of the rotation of the cap, for protecting the circuits connected to the two strips.
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