44
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Operation
Table 7. Settings (continued)
Description
Default Setting
Available Settings
Qualify Bypass
[Always] [Never] [Bypass Disabled]
If Always, Bypass operation is allowed when:
S
Bypass voltages > the value set for Bypass
Voltage Low Limit
S
Bypass voltages < the value set for Bypass
Voltage High Limit
S
Bypass frequency > (nominal frequency -3 Hz)
S
Bypass frequency < (nominal fre3 Hz)
S
Inverter is synchronized with Bypass when
unsynchronized transfers are disabled by the
value set for Unsynchronized Transfers
If Never, Bypass operation is always allowed; voltage
and frequency limits are not in use.
If Bypass Disabled, Bypass operation is prohibited.
Always
Synchronization Window
[Sync Disabled] [
±
0.5 Hz] [
±
1.0 Hz] [
±
1.5 Hz]
[
±
2.0 Hz] [
±
2.5 Hz] [
±
3.0 Hz]
If
±
3.0 Hz, on inverter operation the inverter tries to
synchronize with the Bypass when the Bypass
frequency is not more than 3 Hz from the nominal
output frequency; otherwise, the inverter goes to
nominal frequency. On Bypass mode, the sync
window is always
±
3 Hz.
NOTE:
In Sync Disabled state, if the Bypass
operation is allowed, the UPS synchronizes only
when it is operating on Bypass mode.
±
3.0 Hz
Unsynchronized Transfers
[Enabled] [Disabled]
If Enabled, unsynchronized transfers to the Bypass
are allowed.
If Disabled, unsynchronized transfers to the Bypass
are not allowed.
NOTE:
The Qualify Bypass setting may overrule the
Unsynchronized Transfers setting.
Enabled
External Battery Module (EBM)
[0] [1]
See “Configuring the UPS for an EBM” on page 52.
0