Camco D-Power 1 - Manual (Page 19)

D - P O W E R
S E R I E S
USER MANUAL
D-POWER 05/1
P.18
4.3 Power Amp Protection Systems
4.3.1 Clip Limiter
If the power amp is overdriven, the clip limiter automatically reduces the
output level to reduce the audible clipping.
4.3.2 DC Protection
Each output of the power amp is constantly monitored for persistent DC
voltage levels. If the 3 V thresholds are exceeded at any of the outputs, the
corresponding channel will be muted. If DC was only detected for a short
moment, the amplifier will release mute and work as normal.
4.3.3 Over Current Protection
Over current is permanently controlled in the output stage.
4.3.4 Thermal Protection
A sensor on the amplifier heatsink constantly monitors the temperature. If
a temperature of more than 85 °C is detected at the heat sinks, the input
signal on that channel is reduced. If the temperature exceeds 95 °C, the
main SMPS will be switched off.
NOTE: Due to the construction, the four fixing screws of the amplifier pow-
er stage can get very hot even under normal operation (up to 70 °C). This
does not indicate a failure, the amplifier works correctly.
4.4 Mains Protections
4.4.1 Inrush Current Limitation
Within 2 seconds of the amplifier being switched on, the inrush current
limiter will increase mains current from nearly zero to nominal value. This
value depends on program material, output level and speaker loads.
4.4.2 Mains Over Voltage Detection
Mains over voltage detection is always operative. When the mains voltage
exceeds approx. 265 V (230 V operation) or 138 V (120 V operation), the
amplifier will be switched off. The system will try to restart in intervals and
will return with a soft start when the regular mains voltage returns.
4.5 Main SMPS Protections
4.5.1 Over Current Protection
Main SMPS (Switched Mode Power Supply) transformer current is continu-
ously monitored. If over current occurs, the main SMPS immediately stops
working. Should there be an internal failure, this feature prevents other
parts being damaged.
4.6 Fan
The fan mounted in the D-POWER will be disabled as long as the internal
heatsink temperature is lower than 60 °C. At higher temperatures the fan
will be activated providing improved cooling to the amplifier. Once running
the fan will be switched off again at temperatures lower than 40 °C. 4 OPERA
TION