GE LP11U user manual Other Features, Shutdown, Utility start, Sleep and wake-up

PROG. SHUTDOWN

WITHIN 0:09:17

PROG. SHUTDOWN

LEFT 0:14:03

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Digital Energy™ LP Series

5.5Other Features

5.5.1 Shutdown

'Remote shutdown': Using communication capabilities, the computer can direct the UPS to turn itself off following controlled shutdown of the system. Subsequently the UPS will remain off for at least a few seconds (see also 6.1). LED 'operation' will blink green. The unit will start up again as soon as the utility returns.

'No-load shutdown': The UPS will also switch off if the load is < 2% of the maximum load, and the input is absent for more than 10 minutes. For more information see section 5.3.2, message 'SHUTDOWN ALARM'. NOTE: If the UPS operates in parallel, the no-load function is not available.

'Emergency shutdown': for more information see section 5.3.2, message 'IMMEDIATE SHUTDOWN'.

5.5.2 Utility start

The UPS is able to start, even if the batteries are not connected. Alarm messages 'BATTERY FUSE FAILURE' and 'BATTERY DEPLETED' will be shown. The run time is zero.

5.5.3 Sleep and wake-up

GE Digital Energy™ UPS monitoring software allows you to program a 'sleep period' of the UPS by sending two commands to the UPS:

-shut down after # minutes, and subsequently:

-shut down during # hours.

After the first command the following screen appears:

During the sleep period the output voltage is no longer available. LED 'operation' blinks green, and the LCD screen shows the time left until restart:

If a utility failure occurs during the sleep period and the battery voltage eventually drops below 200Vdc, the UPS will automatically switch off in order to save battery power. When the main returns the UPS will start up automatically. The programmed sleep time however is lost.

The sleep period can be cancelled by either turning the UPS ON/OFF switch (6) off for a few seconds or by sending the appropriate command via the RS232/SNMP port.

5.5.4 Overload protection in bypass mode

The UPS will protect itself in case of overload. Upon an overload which is caused by abnormal circumstances the UPS will switch to bypass operation, and subsequently the bypass input fuse on the front panel will trip. The capacity of the bypass fuse allows it to handle the inrush currents of the equipment connected to the UPS. The fuse will only trip after more than an hour at an input current of 40Amp (LP 5/6-11U) or 50Amp(LP8-11U) or 63Amp (LP 10-11U).

In order to protect the UPS system the software will cut off the abnormal current:

	in 10 minutes:	in 1 minute:
LP 5/6-11U:	36Amp	49Amp
LP 8-11U:	55Amp	65Amp
LP 10-11U	70Amp	81Amp

Between 36-49Amp(LP 5/6-11U), 55-65Amp (LP 8-11U), 70-81Amp(LP 10-11U) the time is inversely proportional to the input current. We advise to place a distribution fuse slow blow type between UPS input and the utility supply. Please refer to the installation drawing.

LX: OPM_LPU_11U_5K0_10K_1US_V030 33 GE DE LP 11U UPS: Installation / User Manual 3.0 (US)