Configuring Bypass Settings - Avaya 9130 Installation And Operator's Manual

OPERATION

Configuring Bypass Settings

The following settings are available for configuring Bypass operation.
Transfer to Bypass When Overload. The default forces a transfer to Bypass
when any overload condition occurs. You can configure the setting for a
delayed transfer, with the amount of delay determined by the amount of
overload, as shown in Table 15 on page 72.
Bypass Voltage Low Limit. The default disables a transfer to Bypass if the
measured bypass voltage level is below the nominal output voltage
minus 15%. You can configure the setting for another percentage of
nominal. This setting can be overruled by the "Qualify Bypass" setting.
Bypass Voltage High Limit. The default disables a transfer to Bypass if the
measured bypass voltage level is above the nominal output voltage
plus 10%. You can configure the setting for another percentage of
nominal. This setting can be overruled by the "Qualify Bypass" setting.
Qualify Bypass. The default allows a transfer to Bypass only when Bypass
is within the following specifications:
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You can prohibit Bypass ("Never") or always allow Bypass with no
specification checking ("Always"). For "Always on UPS Fault," transfer
to Bypass is always made on UPS fault; otherwise, operation proceeds
as with the default setting.
Synchronization Window. The UPS tries to synchronize with Bypass when
the Bypass frequency is less than the value set for the "Synchronization
Window" setting. When the Bypass frequency is more than the set
value, the UPS goes to nominal frequency. On Bypass the
synchronization window is ±5 Hz. If synchronization is disabled ("Sync
Disabled"), the UPS will synchronize only when operating on Bypass.
Unsynchronized Transfers. The default allows an unsynchronized transfer
to Bypass. You can configure the setting to not allow such transfers.
This setting can be overruled by the "Qualify Bypass" setting.
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Avaya 9130 1000–3000 VA UPS Site Preparation, Installation and Operator's Manual
Bypass voltage is between the "Bypass Voltage Low Limit" and
"Bypass Voltage High Limit" settings.
Bypass frequency is within nominal frequency ±5 Hz.
The inverter is synchronized with Bypass when the "Unsynchronized
Transfers" setting is disabled.
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