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  • Scope of Application

    IC65N Circuit Breaker Accessories (MN Undervoltage Release, MV Overvoltage Release, MN + MV overvoltage-undervoltage Release, SD alarm contact, OF auxiliary contact), these MCB accessories are auxiliary functional components designed for C65 circuit breaker , by providing over-voltage, undervoltage and overvoltage-undervoltage detection to the power , to control the circuit breaker on and off, breaking distribution system circuit or detecting circuit breaker signals. The MCB accessories can be used in conjunction with C65N, NB1 series circuit breakers.

    Model meaning and main technical parameters

    Product Model Rated Voltage Un Drop away voltage Application
    Overvoltage
    Release
    MV 230V Overvoltage value Uvo=270V±5%

    To make the circuit

    breaker tripping and achieve
    over-voltage protection of the line
    When the power supply

    voltage rises to 270V ± 5%

    Undervoltage
    Release
    MN 230V Overvoltage value Uoe=170V±5%


    To make the circuit breaker

    tripping and achieve
    under-voltage protection of the line
    When the power supply

    voltage falls between 170V ± 5%

    Overvoltage-
    undervoltage
    Release
    MV+MN 230V Overvoltage value Uvo=270V±5%
    Overvoltage value Uoe=170V±5%

    To make the circuit breaker

    tripping and protect the line
    When the 230V rated power

    supply voltage rises to
    270 ± 5% or falls at 170V ± 5%

    Alarm contact SD 115/230/400V 1、3A

    To provide alarm signal

    when the circuit breaker

    breaking due to

    protective circuits' fault

    Auxiliary contact OF 115/230/400V 1、3A

    To provide auxiliary

    signal and control

    auxiliary circuit

     

    Accessory Rated insulation
    voltage Ui

    Rated control

    supply voltage Us

    Release power
    wastage(W or VA)
    Pull-in voltage
    MX+OF Shunt release+
    Auxiliary contact
    415V AC/DC: 220~380V;110~220V 240 (0.7~1.1)Us
    AC/DC:24~48V 120
    MX+OF
    Shunt release
    +Auxiliary contact
    Active 415V AC/DC: 220~380V;110~220V 240 (0.7~1.1)Us
    AC/DC:24~48V 120
    Passive 415V AC/DC: 220~380V;110~220V 240 (0.7~1.1)Us
    AC/DC:24~48V 120
    MX Shunt release 415V AC/DC: 220~380V;110~220V 240 (0.7~1.1)Us
    AC/DC:24~48V 120

     

    Accessory Rated Current(A) Number of the contact
    in each group
    DC:110V AC:380V AC:220V
    Auxiliary contact OF 3 6 1

    Single Pole Normally Open(SPNO);

    Single Pole Normally close(SPNC)

    Alarm contact SD 3 6 1 SPNO;SPNC

    Outline and installation dimensions


    Keywords: Undervoltage Release , MCB accessories

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