ERICO TDS-MOVTEC Surge Diverters - Manual (Page 22)

G L O B A L L I G H T N I N G T E C H N O L O G I E S
PAGE 22
On circuits with a capacity of greater than
100A, the Movtecs should be installed in
series with a 100A HRC fuse being placed
prior to the Movtec, as detailed in the diagram
on page 21. This will require the Movtec to be
installed in a similar manner to the non-
preferred “T” connection method. Care must
be taken to keep “T” connections as short and
straight as possible. Note that this fuse may
rupture under surge events exceeding 60kA,
thereby disconnecting the protection circuit.
Under such conditions it is important that
suitable monitoring of the alarm contact
should be carried out to detect this possible
occurrence. 10. STATUS INDICATION AND
ALARMS
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.
Each Movtec features 5 protection segments.
The status for each of these sectors is
provided by way of a 5 segment LED bar
graph. If any sector is damaged due to excess
surge activity, a LED will extinguish. The
LEDs extinguish in a sequential order (100%
LED out first, 80% LED out next etc.)
irrespective of which sector has sustained
damage.