Frequently Asked Questions

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RoCoil TCA-5 FAQs​

  • Can the TCA-5 be used with 333mV current sensors?

    The TCA-5 includes a 90 degree phase shifter. It can only be used with 333mV sensors to report current, NOT POWER.

  • Does output clipping damage the unit?

    No, clipping the output signal does not harm the TCA-5.

  • 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.

  • I had the 50Hz selector on by mistake. Is my collected data any good?

    Yes, the phase angle will be reported 0.6 degrees higher than actual, which is also about 0.6% low for a PF of 0.866.

  • 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.”

  • Is there any configuration that can cause the TCA-5 to fail?

    Yes. For example, over-ranging the TCA-5 on any single channel can burn it out. Ensure that the TCA-5 is not delivering more than 5 Amps RMS.

  • 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.

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