Table of Contents
Advertisement
5. Measuring the backup time
5. Measuring the backup time
5-1 Measuring method of the backup time
If the input plug is disconnected while the product is operating, never
touch its metal part.
● Doing so may cause an electric shock.
● The leak current of this product itself is less than the value of the safety standard (leak current:
1 mA). However, leak current increases due to connected equipment. Therefore, never touch the metal
part of the input plug.
● When the product is operating, voltage is generated at the metal part of the input plug via capacitors in
the internal circuit regardless of elapsed time.
(1) Connect the AC Input Plug of the UPS to a wall outlet (commercial power) and charge it for at least 8 hours.
(Turn on the Start Switch. Connected devices may be in operation.)
(2) Bring all connected devices into operation.
(Including devices connected to the AC outlet of your PC.)
Operate them in a way in which it is allowable that power supply to the connected devices stops.
(3) Disconnect the AC Input Plug of the UPS to check that the Battery mode for the time you need or longer is
possible.
* The backup time you measure for the first time after purchase is the "initial value of the backup time."
Initial value of the backup time:
5-2 Estimated backup time
The backup time varies depending on the capacity of connected devices.
After calculating the total capacity of connected devices, refer to the graph of the backup time to obtain an
estimation of the initial value of the backup time.
(1) Unify the total capacity (power consumption) of connected devices to W. Check the display of the con-
nected devices.
There are 3 type of display: VA display, A dis-
play, and W display.
Example 1) 100VAC, 50/60Hz, 145W
Example 2) 100VAC, 50/60Hz, 1.8A
Example 3) 100VAC, 50/60Hz, 150VA
(2) Add the values converted in W to obtain the
total capacity of the connected devices.
(3) Calculate the initial value of the backup time
for the total capacity of the connected devices
from the graph on the right.
Display
VA
W = Power Factor × A × 100
A
∗ When the power factor is unknown, assume
the power factor as 1.
∗ Usually, the power factor takes the value be-
tween 0.6 and 1.0.
minutes
Watt Value
W = Power Factor × VA
Caution
seconds (Fill in the left blanks to note the measured time.)
* For devices that use the VA or A display, convert the capacity into W.
Multiply the value displayed on devices by the value in the table below
for conversion.
80
70
60
50
40
30
20
10
0
0
28
Backup time
(at 25°C, Initial value)
BU100XS +
MB100XSU
BU100XS
BU50XS
BU70XS
100
200
300
400
500
BU50XS/350W
BU70XS/490W
Power consumption of connected devices
600
700 (Watt)
Advertisement
Table of Contents
