Operation (Hardware References); Power Supply; Active Power Factor Correction (Pfc); Automatic Mains Range Selection - D&B D80 Manual

12. Operation (Hardware references)

Ü
0 75
Undervoltage
Protection
Þ
0 85
d&b D80 Manual 1.8 en
Ü
133
Low range Undefined
Operation
Þ
140

12.1. Power supply

The device utilizes a switch mode power supply with active Power
Factor Correction (PFC) and automatic mains range selection.
The power supply is equipped with mains voltage monitoring,
overvoltage and undervoltage protection as well as an inrush
current limiter.

12.1.1. Active Power Factor Correction (PFC)

The active Power Factor Correction provides a clean and highly
efficient sinusoidal current draw, thus providing highest
performance under adverse mains conditions or when very long
power cabling is necessary.
The power factor is above 0.9 for mains power consumption
values of 500 W or higher.

12.1.2. Automatic mains range selection

The automatic mains range selection enables the device to be used
with any mains supply worldwide without the need for manual
action.
High range
Low range
Nominal mains ranges
Behavior with fluctuating mains voltages
With mains voltages other than the nominal voltages specified
above, the device switches to the adequate mode for either
'Protection' or 'Operation'.
The voltage thresholds are dependent on the slope of the mains
voltage change.
Undervoltage
Undefined
Overvoltage
Ü
170
High range
Protection Operation
Þ
190

12.1.3. Mains voltage monitoring

The mains voltage and frequency are recorded by the power
supply and can be viewed on screen. Where voltages outside of
this range are present, a self-resetting protective circuit responds
quickly to isolate the internal Main Power Supply leaving only a
supervisory circuit running to monitor the mains voltage. The device
accepts mains voltages of up to 400 V A C
the device in case of a missing neutral line or running phase to
phase.
208 - 240 V A C
100 - 127 V A C
The Main Power Supply is switched off. In
undervoltage state, the auxiliary mains
supply for device control only operates to a
limited extend.
Ü Ü
266
Overvoltage
Protection
Þ Þ
276
without damage to
RMS
400
400
65