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A range of three phase, three leg solid state contactors for use with
short wave infrared (SWIR) and Low Temperature Coefficient resistive
loads.
Ratings
The current ratings of the 7300S cover the range from 16 to 160amps.
The voltage rating can go up to a maximum rating of 500 volts.
Inputs
These units, with integral heat sinks, are driven by either DC or AC
Logic signals depending on the order code. Also an analogue 4-20mA
input can be specified which gives a linear time proportional output.
Fusing
In all cases the output is zero voltage switching. High speed fuses are
mounted external to the unit for 100 amps and below, internal above
100 amps. They can be ordered as part of the 7300S order code. Spare
fuses or complete fuse and fuseholder assemblies can also be ordered
separately.
Alarm
The 7300S has an optional thyristor short circuit and total load failure
alarm.
An overtemperature shut down is provided for fan cooled units (over
100 amps). An optional overtemperature alarm is also available.
Diagnostic Load Failure detection is an option which alarms on the loss
of one or more parallel heating elements (resistive or SWIR). The
sensitivity is maximum one out of four. It is auto-setting via a front
panel push button.
International approvals
CE (EN60947-4-3)
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