PrevPrev Go to previous topic
NextNext Go to next topic
Last Post 12/18/2012 3:56 PM by  Tony Hodges
Effect of Multiple (in-line) transducers?
 1 Replies
Please register and login to participate in the forums.
Author Messages
Travis W
New Member
New Member

12/18/2012 9:12 AM
    For my application, I would like to measure single-phase and three-phase test objects in two different setups:

    A: Volts - Amps - Watts - Power Factor
    B: --
    C: --

    A: Volts - Amps - Watts
    B: Volts - Amps - Watts
    C: Volts - Amps - Watts

    How much effect, if any, would the extra transducer (or two) have on the other transducers in that "leg" of the circuit or in comparison with the other two legs?

    It appears that the transducers have sufficient input impedance so that they shouldn't have much effect on the circuit; is there a measured value?

    Also, when using more than one transducer in a conductor path that employs a CT (e.g. current, power, and power factor), do the transducers have to be separated from each other to prevent mutual interference?
    Tony Hodges
    CRM Staff
    Basic Member
    Basic Member

    12/18/2012 3:56 PM
    Dear Sir,

    The transducer load taken from the system to be measured is at most 200 miiliwatts for a voltage sensor and 10 milliwatts for a current sensor.

    CR Magnetics' AC transducers utilize torroid style CTs which reject over 99% of any signal that does not go through the aperture of the ring. Therefore, for most applications, proximity to other sensors will not result in significant crosstalk. However, for extremely low sensing applications such as ground faults less than 1 amp, proximity must be taken into account to maintain accuracy.
    Please register and login to participate in the forums.

    Copyright 2024 by CR Magnetics