OMD39088 rev F
11
1.2.1 Operation with non-linear load
A non-linear load is characterized by a high peak current versus its RMS value, that
in normal condition would introduce a distortion on the output voltage waveform. The
inverter is provided with an instantaneous voltage correction facility, completely
managed by the microprocessor, that provides to vary the PWM generation according to
the actual output waveform, in order to keep the THD within 5% even with loads having
crest factor equal to 3.
Picture 5 – Operation with non-linear load
1.2.2 Overload management
Inverter can provide continuously 100% of nominal load and can tolerate overload
conditions up to 125% for 10 minutes or 150% for 1 minute.
Peak conditions such as take-off of engines or magnetic parts are managed limiting
the output current to 150% for 5 cycles, then reducing to 125%.
Any times output power grows above 100% the inverter keeps feeding the loads,
while the microprocessor activates the “thermal image” algorithm to calculate the power
overload based on the output current and duration of the overload.
User loads are powered by inverter output up to the end of maximum allowed time,
then the static switch transfers the load to the emergency line without interruption of
output power.
Picture 6 – Thermal image characteristic
Summary of Contents for B9600FXS
Page 28: ...OMD39088 rev F 27 Picture 21 Handling of UPS B9600FXS 500 600kVA ...
Page 39: ...OMD39088 rev F 38 Picture 28 Terminal board B9600FXS 400kVA side view ...
Page 40: ...OMD39088 rev F 39 Picture 29 Terminal board B9600FXS 500 600 800kVA front view ...
Page 41: ...OMD39088 rev F 40 Picture 30 Terminal board B9600FXS 500 600 800kVA side view ...
