Question 1/V - Arrangement and purpose of protective components fitted
at main distribution frames and other connection points
(Continuation of Question 1/V, 1985-1988; revised wording)
(See also Questions 5/V and 7/V)

The following questions concern protective components of all types
(over-voltage or over-current) fitted at MDFs, subscriber's premises or
other points in the line network.

a) What types of protective components are used?

b) Against what conditions are they intened to protect?
(e.g. lightning, mains induction, mains contacts).

c) Under what circumstances is protection provided?

d) Where and how are protective components accommodated?

e) What are the technical and economic reasons which have led to the
practices described and what results have been experienced?

The particular problems of

- relationships between MDF protection and printed circuit-board
protection, and

- problems of equipment and network protection caused by the
liberalization of equipment in subscribers premises
should be studied.

Note 1 - This Question is to be studied in collaboration with CCIR Study
Groups 1, 3, 9 and 10.