Chapter
February 8, 2016
17
DENT
Instruments
4
Frequently Asked Questions
How can I tell if the amplifier is clipping?
The voltage across the output terminals is above 250mV RMS. Correct this by using a larger wire
gauge or moving the TCA-5 closer to the meter.
Does output clipping damage the unit?
Clipping the output signal does not harm the TCA-5 as long as the output current remains less than
5 amps, as in the case when the output impedance is greater than 50m-ohms or the output wires
are disconnected.
Why does the TCA-5 run so hot?
Each channel dissipates approximately 5 watts of heat at full power.
Why is the TCA-5 limited to 4.5 Amps RMS on 3 single-phase loads?
The TCA-5 has a peak internal current of 19 amps.
Is there any configuration that can cause the TCA-5 to fail?
The TCA-5 will attempt to deliver more than 5 amps if the current being measured is larger than the
selected range. For example: placing the
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current sensor around a conductor with 900 amps
flowing through it. The TCA-5 will deliver 9 amps of current into the output even though the 500
amp range is selected on the front panel. If the output burden is low enough, the TCA will deliver
the requested current and burn out the channel if this condition persists. Note that this scenario is
limited to single phase measurements. A balanced three phase system will share the current
between channels preventing any one channel from overheating.
Is there a 24-volt version?
Not at this time.
Is there a single phase version?
The TCA-5 can be used on single-phase circuits, however there is currently no "1 channel model."
FAQs
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