4 OPERATION

P.20

4.4.3 Mains Failure Detection

Mains Failure Detection is always operative. When the mains supply is interrupted for about 2 mains cycles, the amplifier will switch off. When the mains voltage returns to a normal value, a soft start occurs.

4.4.4 Fuse Protection

The average mains current can peak temporarily, depending on the load impedance and type of signal, at values several times higher than the nominal value allowed by the fuse protection.

Continuous monitoring of the fuse protection status allows the conditions that would trigger the fuse protection to be predicted. In order to avoid shut-down of the amplifier due to current overload, the amplitude of the input signals will be limited.

The limitation of the input signal allows a 6 kW VORTEX power amplifier to be operated reliably from a mains power supply of 230 V/16 A (120 V/30 A; 100 V/30 A).

4.5Main SMPS Protections 4.5.1 Over Current Protection

Main SMPS (Switched Mode Power Supply) transformer current of your VORTEX

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.

4.5.2 Thermal Protection

The temperature of the main SMPS transformer of your VORTEX is permanently monitored. If the temperature exceeds 85 °C, the microchip reduces the input signals of both channels. If the temperature surpasses 100 °C, the main SMPS is switched off. The On LEDs will start a blinking sequence corresponding to this malfunction. (See 6 Troubleshooting)

USER MANUAL

VORTEX 6, 4, 2.6 and 200V

4.6 Fans

The fans mounted in your VORTEX operate permanently, but as long as the temperature remains below 40 °C, they run at their slowest speed and can hardly be heard.The highest detected temperature from either channel controls the speed of the fans. Above 40 °C the speed is increased until it reaches its maximum value.