CURRENT SWITCHING AMPLIFIER
24
CEDRAT TECHNOLOGIES
Current Switching Amplifier
18/12/2017
8.3.5.Minimum output inductance value
For normal operation, the inductance of the actuator is sufficient to provide low di/dt output for EMI and for
proper operation (notably during overload). In this case, no additional output inductor is needed (assuming an
actuator inductance >100µH). However, during a short condition, the current can reach a very high level faster
than the protection system. The overcurrent detection takes about 4µs to trigger. An inductor should be added
in order to further protect the system.
A conservative value for the inductances to be placed at the outputs of the amplifier is 2 x 50µH.
The inductances should be placed in series with the actuator at both outputs.
8.3.6.Protections
The CSA96 includes built-in protection against these fault conditions:
Output over current.
Short circuits of transistors.
Power supply fault.
Over temperature.
Under/Overvoltage.
Warning
The maximum operating ambient temperature is 0°C to 40°C (32 °F to 104 °F).
9.
MAIN VOLTAGE CONNEXIONS
The switching amplifier can be connected to the 110VAC or 230VAC main voltage without any modifications.
9.1.
CIRCUIT BREAKER
The product does not contain any switch as part of the equipment. Consequently:
a) A switch or circuit-breaker must be included in the installation;
b) It must be suitably located and easily reached;
c) It must be marked as the disconnecting device for the equipment.
