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Introduction
The FCA250 & FCA500 frequency converter series were designed electrically and mechanically to achieve
optimal ruggedness required for industrial, telecommunications, military and airborne applications.
Electrical Connections
The input can be grounded either on the positive or negative, or may be left floating. The output is normally
grounded, although it can be floating if required.
The input connections are via a 3-pole terminal block. GND, PH and N are clearly labeled. The output con-
nections are via a standard North American receptacle (other input/output options available).
All connections should follow NEC standards.
Location
The unit should be mounted securely to a flat surface with a minimum of one-inch clearance to provide
ample airflow and to achieve maximum continuous power. Cooling is enhanced if the unit is installed on a
metal surface to allow for additional conduction cooling.
ON/OFF Switch
The FCA250 & FCA500 frequency converter series have an ON/OFF switch which disables the converter’s
control circuit. Turning the switch to the ‘OFF’ position cuts the power to the AC output. A minimum cur-
rent drain will continue on the input side.
Electronic Protection
The frequency converter has a number of protection circuits designed to provide full electronic protection:
Grounding
– The input can be either positively or negatively grounded, or may be left floating. The output is
normally floating, although it can be grounded.
Thermal shutdown
– In the event of overheating due to high ambient temperatures, blocked airflow or over-
load conditions, the internal thermal protection circuit will shut the unit down. Operation will automatically
resume when the temperature reaches the specified operating level.
Overload and short-circuit protection
– In case of an overload or short circuit, the converter will go into
”hiccup” mode. This means that the unit will automatically shut down and will periodically test whether or
not the overload condition still exists.
Input and output filtering
– All FCA250 & FCA500 series frequency converters have a double stage input
filter to restrict EMI emissions. Filtering also provides immunity against voltage spikes and other distur-
bances on the input power line. The converters meet FCC 20780 Class B and EN 55022 Class B conducted
emission requirements.
Operating
Before plugging any appliance into the frequency converter, please refer to its power requirements. Power re-
quirements are indicated in watts (W), volt-amps (VA) or amps (A). Ensure that the rating does not exceed
the frequency converter’s capacity.
