APC Back-UPS 1250 User Manual download pdf (Page 24)

Page 22

5.0 Operation

5.6 Option switches - continued

5.6.2 Option switch 2

Option switch 2 controls different functions depending upon the UPS version type. The

switch controls no functions on 100 Vac and 208 Vac version UPSs.

■ 120 Vac version

The UPS's factory set input voltage limits for on-line and SmartBoost operation are

given in section 9.0 and are centered on the nominal input voltage of 120 Vac. When

Option switch 2 is set to the on ( I ) position, the upper and lower transfer voltages are

lowered by 4% and are centered on a nominal input of 115 Vac. This option is useful

where the nominal input voltage is 110 to 115 Vac.

■ 220/230/240 Vac version

The UPS's factory set on-battery output voltage and input voltage limits for on-line and

SmartBoost operation are appropriate for use in regions where the nominal line voltage

is 220 to 230 Vac. When Option switch 2 is set to the on ( I ) position, the upper and lower

transfer voltages are raised by 4% and are centered on a nominal input of 240 Vac. In

addition, the on-battery output voltage is increased to 240 Vac.

5.6.3 Option switch 3

When Option switch 3 is set to the on ( I ) position, the UPS's audible alarm is disabled

for the first 30 seconds of an extended utility fault. This function is useful where brief

power interruptions are frequent and cause the alarm to become annoying.

5.6.4 Option switch 4

When Option switch 4 is set to the on ( I ) position, the UPS's low battery warning interval

before shutdown due to battery capacity exhaustion is extended from 2 minutes (factory

setting) to 5 minutes. This function is useful where the UPS is protecting a computer

system that requires longer than 2 minutes warning before power loss to perform a

graceful shutdown.

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 43 44

No comments

APC Back-UPS 1250 User Manual Page 24