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3.2.13 Alarm and Status Messages
Status Messages
The status messages indicate whether the static bypass switch is connected or disconnected. The sta-
tus messages also advise the operator when a transfer or retransfer between the UPS and bypass line
is permitted, based on matching voltage, frequency and phase.
The following status messages may appear in the system status area.
1. Static Switch Connected. The static switch is connected (the disconnect switches are closed—
ON) and is ready to provide a current path from the bypass input to the load.
2. Static Switch Disconnected. The static switch is disconnected (the disconnect switches are
open—OFF) for maintenance procedures.
3. OK to Transfer. The UPS system voltage, frequency and phase match the bypass line. This
means that a transfer between the bypass line and the UPS is permitted.
4. Not OK to Transfer. Either the UPS or bypass voltage, frequency or phase is not within the
specified limits or the static bypass switch is not available. Therefore, manually initiated transfer
between the bypass line and the UPS is not permitted. Emergency or overload transfer to bypass
may still be available provided the “Static Switch Unable” alarm is not indicating.
5. Time to Overload Transfer. During an overload condition, the time remaining before transfer
(in seconds) is displayed at the bottom of the load block.
Figure 40 Alarm and status message screen
STATUS
MESSAGES
VOLTS 480
AMPS 645 DISCHARG
UPS RATINGS
A-B B-C C-A
480V 480V 480V
60.0 Hz
AP658-64
RATED 500 KVA
OUTPUT VOLTAGE
LOAD
A B C
270 KVA / 217 KW
325A 325A 325A
Time To Overload
Transfer: XXXX SEC
UPS INPUT PWR
BYPASS INPUT
A-B B-C C-A
0V 0V 0V
0 Hz
480V 480V 480V
0A 0A 0A
A-B B-C C-A
Byp Not Avail
Input Fail
Batt Discharging
ALARM
MESSAGES
BATTERY
Not OK to Transfer
Static Switch Connected
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