51 Drawout Semi-Flush Mounted 1, 2 and 3 Phase Overcurrent relays

The type 51 series of overcurrent realys provide overcurrent protection phase-to-phase or phase-to-ground. The yare designed to be operated by standard five ampere secondary current transformers.

51I Inverse
51Y Very Inverse
51E Extremely Inverse
51D Definite Time
51S Short Time
51L Long Time
51IM Long TIme Inverse
51YM Long Time Very Inverse

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    ABB contact for United States of America

    Sales: Paula Ortiz
    Service: Cristine Luong
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