Protective Circuits; Over Current Protection - Warwick LWA 1000 Owner's Manual

PROTECTIVE CIRCUITS

Your new Warwick LWA 1000 amplifier is equipped with a multitude of protective circuits to prevent it from malfunction under
inappropriate operating conditions.

Over current protection:

All amplifier channels are over current protected on outputs. Current clipping is engaged when the amplifier channels exceed its
specified peak current output. This can be seen as the output voltage of the amplifier being clipped. If the current output of an amplifier
channel exceeds its specified peak current output for a longer period of time e.g. in case of a short circuit of the output, the amplifier will
be disabled (Muted) for 1000ms and automatically restart.
DC current protection:
A built-in DC protection circuit will attenuate any DC signals on the power amplifier input, produced by a signal containing a DC signal.
In case of a permanent DC on the output of the amplifier, the amplifier will latch and power must be removed for the product to restart.
Over-/under voltage protection:
Power supply over- and undervoltage protection is implemented, which means that the power supply will enter a protection mode when
the operational off-line voltage exceeds or drops below the specified upper and lower operational off-line AC voltages. However
exceeding 265VAC for a longer period of time might damage the power supply primary side permanently.
HF protection:
A high frequency protection is implemented in order to protect the power amplifier module filter components from overload. The high
frequency protection algorithm has been implemented to protect the amplifier from excessive HF signals on the amplifier outputs.
Excessive Temperature:
This circuit protects the power stages from malfunction by switching the device off if the temperature-regulated fan cooling proves to be
insufficient and temperature of the unit is too high.
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