Baldwin Boxall BV225 Installation Instructions Manual - page 14
BV225 Amplifier
Installation Instructions
8
BV225 Installation Manual issue 3
3.2 “O
VERLOAD
” LED I
LLUMINATED
3.2.1 Abnormal Load Condition
The output stage is protected against overload conditions (e.g.
short circuits or abnormal loads) by sensing the current and
voltage and using these to control an input attenuator.
Should the amplifier be subjected to an abnormal load the input
to the power amplifier is attenuated to a safe level using the VCA.
The amplifier output voltage is also sensed and should it exceed
100V the VCA will be activated and will reduce the input signal
ensuring safe operation without creating unnecessary distortion.
If the system is under surveillance it will cause the surveillance
detector to indicate a fault condition due to the gain reduction.
3.2.2 Over Temperature Condition
Over temperature protection is provided using a sensor attached
to the output stage heatsink.
Should the temperature exceed 90°C the input signal to the
power amplifier is attenuated to a safe level using a Voltage
Controlled Attenuator and the front panel indicator is
illuminated.
If the system is under surveillance it will cause the surveillance
detector to indicate a fault condition due to the gain reduction.
3.3 D
ISASSEMBLY
P
ROCEDURES
There are no Disassembly Procedures for this unit.
!
W
ARNING
The BV225 Amplifier output stages contain Hot Parts, High
Voltages, and operate at High Frequencies.
Do not attempt to disassemble these units or operate them
without the covers in place.