Tripolar electrical protection device for cable head in terminal block of telecommunication distributor, has surge arrester including short-circuit ring partially arranged within depth of opening on outer surface of device

摘要

The device (1) has two electrical contacts (3) intended to be connected to a pair of conductors of an electrical cable. A surge arrester (5) includes a short-circuit ring (9) to connect the electrical contacts to an earth contact (6) in case of over-voltage, where the short-circuit ring is partially arranged within the depth of an opening (12) on an outer surface (7) of the device. The outer surface of the device includes a plastic cover arranged above the surge arrester, where two arrester contacts (4) are connected to the surge arrestor and the electrical contacts.