ERICO TDS-MOVTEC Surge Diverters - Manual (Page 23)

D I N L I N E I N S T A L L A T I O N I N S T R U C T I O N S
PAGE 23
of one of the three modes and that the TDS-
Movtec unit should be replaced.
MOVTEC MODEL TERMINALS ALARM OPERATES
WHEN
TDS-MT-277 X5 & X7 MOVTEC displayed
capacity =< 60%
MT275V-135K-A X5 & X7 MOVTEC displayed
capacity = <60%
TDS-MTU X5 & X7 MOVTEC displayed
capacity = <80%
Contact Rating 250Vac, 10A resistive, 1A inductive
Contact connection Multi-stranded wire with CSA not
greater than 1.5mm 2
Where multiple Movtecs are used, such as in
three phase distribution systems the alarm
contacts may simply be connected in series to
provide a common alarm output connection.
When mains voltage is applied to the fully
functional Movtec, the alarm contacts will be
closed. Should the surge handling capacity
fall to below the alarm threshold, these
contacts will open. The contacts are “fail-safe”
in that, if power to the unit fails, the contacts
will also revert to the open condition.
For Single Mode units (TDS-MT-277 and
MT275V-135K-A)
• The voltage free alarm contacts are activated
(opened) as soon as the primary protection
status displays 60% or less and indicates
that the Movtec unit should be replaced.
For Three Mode units (TDS-MTU)
• The voltage-free alarm contacts are activated
(opened) as soon as the protection status
displays 80% or less. This indicates that
damage has been sustained to the protection