Hardware Protections; 7.Power Supply Protections; 7.1. Primary Ac Mains Overcurrent Protection; 7.2. Primary Ac Mains Overvoltage Protection - powersoft IpalMod User Manual

Hardware protections

The architecture of Powersoft's amplifiers encompass
several protection mechanisms triggered by harmful signal
and temperature. Protection systems and triggers are inde-
pendently implemented in the power supply section (power
supply protection) and the amplifier section (amplifier pro-
tections); most of the protection threshold values can be
set through the Power Control Manager (ref.
Advanced parameters).

15 : 7.Power supply protections

Power supply protections aim to isolate a faulty section
in electrical power system from the rest of the device in
order to prevent the propagation of the fault and limit device
damages.

15 : 7.1. Primary AC mains overcurrent protection

AC main overcurrent are filtered by two 10 A time-lag
fuses (also known as time-delay or low blow-fuse). The
purpose of the time lag fuses is to allow the supply in elec-
tricity for a short time before the fuses actually blow. If the
time-lag fuses blow out, the amplifier switch off; replace the
fuses with proper 10 A time-lag fuses in order to restore the
full functionality of the amplifier.

15 : 7.2. Primary AC mains overvoltage protection

AC mains overvoltage threshold is set to 295 V
AC mains voltage exceeds 295 V
working; the device does not turn completely off but falls in
a "sleeping" mode: the power supply turns on again when
the AC mains voltage drops under 290 V
AC mains overvoltage are well tolerated by the power
supply: no damages can be caused to the system even in
case of severe overvoltage up to 400 V

15 : 7.3. Primary thermal protection

The temperature is detected at power supply and trig-
gers the heat dissipated by the device: if the temperature
rises exceeding components tolerances, the primary
hardware thermal protection starts lowering the rails volt-
age in order to lower the heat wasted and keep the overall
efficiency high.
The process is drived by the DSP section of the Control
Board and is auto-adaptive, aiming to maintain the system
up even in heavy thermal condition.

15 : 8.Amplifier protections

The amplifier section protections are managed by the
DSP section on the Control Board and can be customized
by means of the Power Control Manager software.
Chapter 15 : 4.
. If the
rms
the power supply stop
rms
.
rms
.
peak

15 : 8.1. Auxiliary power protections

Auxiliary plugs are protected against short circuit: a
poliswitch opens the auxiliary circuits when the current
drawn exceeds 1 A.
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