Camco Vortex 2.6, Owner'S Manual

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CAMCO USER MANUAL
VORTEX POWER AMP SERIES
P.19
4.4.6 DC Servo
To Prevent DC-Offset at the Speaker output the VORTEX is fitted with two
DC-Servos.
4.4.7 Power Amp Over Current Protection
Over current is permanently controlled in the output stage. There are two
limits of over current depending on output voltage. These limits will be set
automatically.
4.4.8 Power Amp Thermal Protection
The microprocessor uses several sensors in the amp in order to ascertain
temperature data. If the microprocessor detects a temperature of more than
85 °C at the heat sinks, the input signal on that channel is reduced. A linear
reduction of 6 dB is applied up to a temperature of 95 °C. If the temperature
continues to rise, the microprocessor mutes the affected channel as soon as the
temperature exceeds 95 °C.
The power LED of the overheated channel will start a blinking-sequence
(See 7.0, Trouble Shooting)
4.5 Mains Protection
4.5.1 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.
4.5.2 Mains Over Voltage Detection
Mains over voltage detection is always operative. When the mains voltage
exceeds approx. 267V (230V operation) or 134V (110V operation), the amplifier
will be switched off. When the mains voltage returns to nominal value, a soft
start occurs.
4.5.3 Mains Failure Detection
Mains failure detection is always operative. When the mains supply is
interrupted for about 2 mains cycles, the amplifier will be switched off. When
the mains voltage returns to a normal value, a soft start occurs.
4.5.4 Fuse Protection
Depending on the load impedance and type of signal levels, the effective
mains current can, even during normal operation, reach a level several times
higher than its nominal value for short periods. Repeated peaks of this nature
will also cause the average value to increase. In such cases, the internal mains
fuse acts as a “bottleneck”, and would blow if the average current remained too
high for an extended period. In order to avoid this unsatisfactory operation, the
mains fuse is simulated inside the amplifier and provides the microprocessor
with information. Prior to the point when the fuse would blow, a signal is sent
to the microprocessor, which then instantaneously reduces the signal level.
After the known recovery time for the fuse has elapsed, the signal is again
adjusted to its normal level. This offers reliable operation of a 6kW
VORTEX
on 16A Mains.
4.6 Main SMPS Protections
4.6.1 Main SMPS Over Current Protection
Main SMPS (Switched Mode Power Supply) Transformer current is continuously
monitored. If over current occurs, the main SMPS immediately stops working.
Should there be an internal failure, this feature prevents other parts being
damaged.
4.6.2 Main SMPS Transformer Thermal Protection
If the microprocessor detects a temperature of more than 85 °C at the
transformer, the input signal will be reduced. If this also proves ineffective and
the transformer temperature exceeds 110 °C, the power supply is automatically
switched off independently of the microprocessor. A complete reboot will then
4.0 OPER
ATION