Dell UPS 3750R Manual de usuario descargar pdf (Pagina 25)

Operation

Table 6. Settings (continued)

Description Default SettingAvailable Settings

Bypass Voltage Low Limit [-6%] [-7%]...[-20%] of nominal

The Bypass operation is disabled if the measured

bypass voltage level is below the nominal output

voltage (-15%).

NOTE: The Qualify Bypass setting may overrule the

Bypass Voltage Low Limit setting.

-15% of nominal

Bypass Voltage High Limit [+6%] [+7%]...[+20%] of nominal

The Bypass operation is disabled if the measured

bypass voltage level is above the nominal output

voltage (+10%).

NOTE: The Qualify Bypass setting may overrule the

Bypass Voltage High Limit setting.

+10% of nominal

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 frequency +3 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

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