FAULT – Closed when the UPS encounters a fault condition, such as high dc
shutdown, short circuit, fuse/over-heat, overload shutdown, emergency stop,
inverter abnormal, bypass on shutdown. The contact is latched until manual
reset (off switch) or 30 seconds after the fault condition is removed.
SS – Closed when the inverter static switch is conducting, open when the reserve
static switch is conducting (The two static switches will never conduct
simultaneously).
BYPASS – Closed when the maintenance bypass breaker is closed, open when
the breaker is opened.
BACK-UP – Closed when the inverter (running) is being backed up by the
battery.
BATL – Closed when the inverter is using battery power and the batteries are
about to be exhausted.
COM – This contact is the OR result of the signals described above. That is, if
any other contact closes, this contact will also close. The signal to be read is
selectable through SWR2. See the figure below.
SWR2-1
SWR2-2
SWR2-3
TO
SWR2-4
INTERNAL
CIRCUIT
SWR2-5
SWR2-6
SWR2-7
SWR2-8
OR
6-2
RELAY
CNR12
RELAY
CNR17
RELAY
CNR13
RELAY
CNR16
RELAY
CNR14
RELAY
CNR19
RELAY
CNR20
RELAY
CNR15
INVON
OVL
FAULT
SS
BYPASS
BACK-UP
BATL
COM
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