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Overcurrent-Undervoltage relay?

  1. Jan 9, 2012 #1
    Is there such a relay that can act as overcurrent as well as undervoltage? I might have mistaken it for something else so I just want to make sure. Thanks in advance.
     
  2. jcsd
  3. Jan 11, 2012 #2
    What is the maximum current rating...???

    Try MPCB for lower current ratings to protect motors.
     
  4. Jan 11, 2012 #3

    Bobbywhy

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    Gold Member

    Overcurrent and undervoltage are two separate condititions.

    For example: A sensing circuit is used to detect voltage. When the voltage decreases below a set point an alarm or signal is generated. This signal may activate a relay to control something else.

    Same for overcurrent: A circuit detects the current. When the current exceeds some set point, an alarm or signal is generated. This signal may activate a relay to control something else.
     
  5. Jan 11, 2012 #4

    dlgoff

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    There are companies that provide microprocessor based "relays" which preforms a large number of protection functions in one "relay" case. e.g.

    "www.ceerelays.co.uk/brochures/CEE%20PRAG.pdf" [Broken]
     
    Last edited by a moderator: May 5, 2017
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