ERICO TDS-DINLINE Surge Suppressor - Manual (Page 17)

PAGE 17
The selection of the 100A HRC fuse is not
based on the load carrying capacity of the
main circuit but the “T” connection I
2 t rating.
The “T” connection under normal conditions
does not carry the load current. Only under
surge or fault conditions does this connection
carry large currents. Under Australian
Standard AS3008.1-1989 it is permissible to
rate the protection for these types of circuits
by the I
2 t ratings of the cable. For installation
of Surge Suppressor in countries not covered
by these regulations it is recommended that
this practice be followed, unless it conflicts
with the compliance of the local regulations.
12. STATUS INDICATION
A characteristic of all transient and surge
protection devices is that they degrade in
proportion to the magnitude and number of
incident surges to which they have been
subjected. Status indication should be
periodically monitored to determine if
replacement is required.
2S units
These units are identified by the single Status
Indicator provided on the front panel. When
power is applied and full surge capacity is
available the Status Indicator will be
illuminated. Should the indicator fail to
illuminate the Surge Suppressor should be
replaced, as optimum protection is no longer
provided. Note: The Status Indicator will not
operate (regardless of surge capacity) if power
is not available.
4S units
These units are identified by two Status
Indicators which are provided on the front
panel. These Status Indicators monitor