OMD10078 rev F
43
5.1.4 Programmable rectifier soft-start (Walk-in)
The values of the “Walk-In” Soft-Start function can be enabled and set via the Test
Software. The setting range of the values is 5 to 30 seconds.
The Walk-in function allows to change the rectifier soft-start from the DC voltage
generated by the SCR bridge to the one imposed by the Battery charge or by the
floating voltage. The Walk-in function, like the delayed start function of the rectifier,
allows to reduce disturbances to the diesel generator due to the supply of the UPS
systems.
5.1.5 Sequential rectifier start for parallel systems (Hold-off)
The values of the Sequential Rectifier Start function can be enabled and set via the
Test Software. The setting range of the values is 1 to 300 seconds.
The delayed rectifier start function is useful when several UPS systems are supplied
by the same diesel generator. In fact in this case it might be useful to restart the UPS
rectifiers at different time intervals, in order to temporally distribute the load supplied by
the generator.
5.1.6 Frequency converter
The values of the Frequency Converter function can be enabled and set via the Test
Software.
The frequency converter function allows to have a 60 Hz frequency on the UPS
output, whereas the input frequency is 50 Hz or vice versa. When enabling this function,
the bypass will be automatically disabled as it is no longer possible to synchronize the
two sources.
5.1.7 DCM function
The values of the DCM function can be enabled and set via the Test Software.
The DCM function allows to increase the battery charging current proportionally,
based on the current absorbed on the UPS input. The maximum settable values are
indicated in the technical specification.
5.2
OPTIONS PROVIDED ON REQUEST
1.
Thermal compensation of battery voltage
2.
Insulation transformer on bypass line
3.
Auto-transformer for the adaptation of input voltage
4. Alarm
card
5.
RS485 serial interface (MODBUS protocol)
6. SNMP
accessory
7. Remote
panel
8. Parallel
kit
9.
Battery cabinet
10. Wall mounted isolator with battery fuses
11. Cables
inlet/outlet from top
12. Special
painting
13. “Load-sync bus” kit
14. Back feed (protection from power return to mains)