Wärtsilä JOVYTEC P 700VA
– 3kVA
BAX 3345
- 24 -
7.6
OFFLINE mode
The UPS unit can be operated using special settings via the display or with the software supplied in
offline mode. This operating mode has the advantage of only using a small amount of energy.
The formalism for setting to OFFLINE mode is as follows:
- The key
FUNC
must be pressed for 2 seconds to obtain configuration mode.
The first configuration parameter appears in the display.
- The key
FUNC
can be used to manoeuvre through the parameters.
- Select the parameter point to be altered using the key
ENTER
, in this case: HE mode
- The key
FUNC
is then used to manoeuvre through the options for the selected parameter (ON/OFF).
- You have the option to select between 10% and 15%, which are the thresholds to be monitored, and if the
voltage does not meet this criterion then the UPS switches to battery operation.
- The selected option is confirmed using the key
ENTER
and saved by pressing the key again.
- Ensure that the settings were adopted in that the display shows: High Efficiency.
- The UPS unit will start again automatically after restoration of the mains power and starts in the preset mode
after a long period of power loss where the end of the autonomy period was reached and the UPS shut down
once the final discharge voltage was reached.
7.7
Free running mode
The text below explains the free running mode. The preset input frequency window of the UPS has a
range of 45Hz - 65Hz and is referred to in the following as the input frequency range.
The narrow input frequency range has a frequency range of 49Hz - 51Hz. This range can be set via the display
and operates in the following ranges:
I/P input frequency low = 50 x (1-0.02) = 49Hz I/P input frequency high = 50 x (1+0.02) = 51Hz
7.7.1
Free running ON
If the input frequency is 49.3Hz, this value is within the narrow input frequency range. This means that the
output frequency is also 49.3Hz (synchronised) and the UPS unit runs in line mode. If the input frequency then
drops below 49Hz, for example 48Hz, the input frequency is outside the narrow input frequency range but still
within the broader input frequency window. The output frequency will therefore be 50Hz and the UPS unit will
remain in line mode. If the input frequency were 43Hz then it would be outside both the narrow and the broader
input frequency window. The UPS unit switches to battery operation and supplies the load via the inverter with
50Hz.
7.7.2
Free running OFF
If the input frequency is 49.3Hz, this value is within the narrow input frequency range. This means that the
output frequency is also 49.3Hz (synchronised) and the UPS unit remains in line mode. If the input frequency
then drops below 49Hz, for example 48Hz, then the input frequency is outside the specified values for the
narrow input frequency range and the UPS unit switches to battery operation and supplies the load via the
inverter with 50Hz.
7.7.3
Setting the bypass tol activation/deactivation of the bypass
The UPS unit offers the option of activating and deactivating the bypass. There is also the option of setting the
bypass network tolerance via the display (see Chapter 7.4).
The functionality of the bypass tolerance is described below.
If the UPS unit has a fault and the bypass is activated but the input voltage does not have the quality to supply
the consumers then the following examples can arise:
7.7.4
Free running ON, bypass deactivated
Example:
Input voltage for bypass:
210 V
Input frequency for bypass:
52Hz
Output voltage of UPS:
230 V
The bypass tolerance is set to +15/-20% as the bypass range window (set via the display) so the bypass
window has the following values:
