Dell K804N, K805N, J739N, 3750W, J730N, H952N Settings Description Available Settings Default Setting

Table 6. Settings (continued)

Description	Available Settings		Default Setting
Bypass Voltage Low Limit	[-6%] [-7%]...[-20%] of nominal		-15% 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.
Bypass Voltage High Limit	[+6%] [+7%] [+20%] of nominal...		+10% 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.
Qualify Bypass	[Always] [Never] [Bypass Disabled]		Always
	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.
Synchronization Window	[Sync Disabled] [±0.5 Hz] [±1.0 Hz] [±1.5 Hz]		±3.0 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.

44 Operation