OPM_NPE_XXX_2K0_4K0_1GB_V040
11
NetPro 2000-4000: user manual 4.0 (GB)
GE Digital Energy
g
NetPro 3000/4000 only:
One of the applicance outlets (4a, fig. 1) is programmable. Three settings are possible:
!
ON
!
OFF
!
AUTO
When the UPS is started the outlet is always switched ON, but it can be switched off either manually or
automatically.
With the default setting 'ON', the outlet functions similar to the other appliance outlets: it delivers output
power as long as the output converter does. When 'OFF' is selected, the outlet switches off. When the
option 'AUTO' is selected, the system asks for the 'Off autonomy time': the remaining runtime (in minutes)
at which, during a mains failure, the programmable output is automatically switched off until the mains
returns. This way less critical equipment (e.g. screens, printer) can be switched off automatically in order
to lengthen the remaining runtime.
Figure 6 shows an example. The total predicted runtime is 15 minutes, and the 'off autonomy time' has
been set on 5 minutes: the outlet switches off 5 minutes before the predicted end of autonomy.
As the load decreases when the outlet switches
off, the actual remaining autonomy at the 'outlet
off' moment (which was predicted at present
load) will be longer than the programmed 5-
minute period.
In configurations with small loads and large
battery capacities, i.e. very long runtimes, the
step size with which the runtime is counted
down can be longer than the programmed 'off
autonomy time' (see section 3.5). In this case
the programmable outlet will be switched off
when the remaining runtime is one step from
zero.
Example: suppose the runtime is counted down with 10 minute steps, and the 'off autonomy time' is set
as mentioned above. Despite of the 5-minute setting, the outlet will be switched off 10 minutes (= one
step) before end of autonomy.
If the step size does not exceed the 'off autonomy time', the programmable outlet will be switched off at
the programmed moment although the accuracies may not match. Example: 'off autonomy time' set at 14
minutes while the step size is 10 minutes, the outlet will indeed be switched off 14 minutes before the end
of the autonomy.
If the option 'AUTO' is selected the programmable outlet can still be switched off manually using the front
panel keys.
Each time the mains returns, the programmable outlet will always be switched on. Therefore do not use
this outlet to switch off equipment that should permanently remain off.
The frequency tracking rate is the maximum rate at which the UPS adjusts its output frequency to
fluctuations of the input frequency. If the UPS is not connected to a generator set the default setting may
be too high. Note that a change of the frequency tracking
rate
is coupled with a change of the tracking
range
(see chapter 8, bypass).
The runtime, below which the UPS is inhibited to start up, can be set here. The UPS will first recharge its
batteries and start up as soon as the 'start up autonomy' is available. The setting can be bypassed (see
also 3.2.3). Calculation of the 'start up autonomy' is based on the assumption that the UPS supplies 100%
load.
:BFI-'FJA=>A
PB-AB@KN67I'B@A>
(A@BA'@JAF7-A65>
15
0
5
mains
failure
remaining autonomy (minutes)
output
off
end of
autonomy
'Off
autonomy
time'
I4D211-9
fig. 6 Off autonomy time
