Extra protection module of an exchange

Details Extra protection module of an exchange Extra protection module of an exchange

1994-04-18

1995-06-20

Hoff, Marc S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

361 56, 361 91, 361118, H02H 900

Patent

active

054265568

ABSTRACT:
A protection module connected between a main distributing frame and an exchange, for protecting a subscriber circuit from an overvoltage or an overcurrent, comprises an overcurrent protecting device 21 connected between an output of the main distributing frame and a tip line of the exchange; an overcurrent protecting device 211 connected between an output of the main distributing frame and a ring line of the exchange; and an overvoltage protecting device 22 connected in parallel between the tip line and the ring line, having an output (GND) line connected to the exchange.

REFERENCES:
patent: 4907120 (1990-03-01), Kaczmarek
patent: 4964160 (1990-10-01), Traube et al.

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