Archimod HE 240-480®
Installa
tion and main
tenanc
e manual
31
If the UPS detects a voltage backfeed, the bypass input line disconnector switches off automatically and the backfeed
control contact changes status.
When the protection operates the cause must be checked.
To switch the UPS bypass input circuit disconnector on again reset it by turning it anticlockwise, then switch it on.
The auxiliary contact characteristics are:
• Maximum applicable voltage: 250Vac.
• Maximum applicable current: 5A, cosφ = 1
INDICATION
If during operation the UPS signals that the backfeed protection has been actuated, contact the LEGRAND Technical
Support Service.
TT distribution system and and backfeed protection circuit connection diagram with bypass line in common at
the mains input
S10: thermal-magnetic/differential circuit isolation switch specified for the input line
S13: mains input line neutral opening contactor
S11: isolation switch in parallel to the S13 contactor coil
S12: two-pole isolation switch in series to the line to the EC9 connector of the relay interface card
Summary of Contents for Archimod HE 240
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