User manual
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USER MANUAL
Q-POWER 14
|
POWER AMPLIFIER
3
MAINS SUPPLY
3.4 Mains Voltage Range
To guarantee the best amplifier performance all over the world the power supply
internally works with three mains voltage “grids” or “ranges”. These are:
> 100 V
AC
(Japan)
> 110-127 V
AC
(North and parts of South America)
> 200-240 V
AC
(Europe and the “Rest of the World”)
For each grid there is a set of highly optimised control parameters to get the
maximum power performance achievable. The appropriate grid is automatically
selected each time the amplifier is powered up. The grid selection is done solely
inside the power supply’s DSP software, there are
no
electrical or electrome-
chanical switches (e.g. relays) inside the power supply.
The selection of the three grids is based on the analysis of the mains voltage for
approx. 1 second, and done on following thresholds:
Japan
(100 V
AC
)
America
(110 – 127 V
AC
)
ROW (Rest of the World)
(200 – 240 V
AC
)
ß 80 V 107 V à ß 107 V 140 V à ß 140 V 265 V à
l
NOTE
The power supply will not start below approx. 80 V and above approx.
265 V. Once running, it can handle mains voltages from 50 to 280 V.
Once the Q-POWER 14 is powered up the range will be kept even if the mains
voltage varies in large borders, according to these thresholds:
Range Nominal voltage Operating range
Japan 100 V
AC
50 V – 180 V
America 110 – 127 V
AC
50 V – 180 V
ROW (Rest of the World) 200 – 240 V
AC
50 V – 280 V
This means that if the mains voltage rises higher than 180 V in either the Japan
or the America range, the power supply will switch off shortly and restart in the
ROW range (provided the mains voltage is stable and higher than 140 V).
On the other hand, if the Q-POWER 14 is once running in ROW range, the range
is never changed anymore, until power loss or manual switch-off.
3.5 Inrush Current Limitation
The Q-POWER 14 has a special algorithm dedicated to limit the mains inrush
current. This limiter will take action anytime the main SMPS is powered up. It will
confine the mains current to a value smaller than 15 A
RMS
*.
* maximum rms value of inrush current over one half-cycle of the mains voltage according
to DIN EN 55103-1.
l
NOTE
When demanding very high output powers the mains current can reach
levels up to 75 A (ROW range) or 106 A (America and Japan range) for very
short periods of time. This could cause lamps to icker if connected to the
same mains as the amplier.