Manual

6-2

RELAY

CNR15

FAULT – Short when UPS encounter fault condition such as high dc shutdown,

short circuit, fuse/over-heat, overload shutdown, emergent stop, inverter

abnormal, bypass on shutdown, and is latched until manual reset (off

switch) or 30 sec. after fault condition removal

SS – Short when the inverter static switch is conducting, open when reserve

static switch is conducting (The two static switches will never conduct

simultaneously).

BYPASS – Short when the maintenance bypass breaker is closed; open when

the breaker is opened.

BACK-UP – Short when the inverter (running) is back-up by the battery.

BATL – Short when the inverter is consuming the battery and the battery is

about to be exhausted.

COM – This contact is the OR result of the signals described above. That is,

any other contact close, this contact will close too. The signal to be ored is

selectable through SWR2. See the figure

SWR2-1

SWR2-2

RELAY CNR12 INVON

INTERNL

CIRCUIT

SWR2-3

SWR2-4

SWR2-5

SWR2-6

SWR2-7

SWR2-8

RELAY CNR17

RELAY CNR13

RELAY CNR16

RELAY CNR14

RELAY CNR19

RELAY CNR20

OVL

FAULT

BYPASS

BACK-

UP BATL

COM