ABB IWX161A-1 Ground Fault Relay

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• • 1. Product Overview

    The ABB IWX161A-1 is a high-sensitivity ground fault relay designed to detect earth leakage and ground fault currents in AC power systems. When insulation failure or leakage to earth occurs, the relay quickly activates an alarm or trip signal, protecting personnel and electrical equipment and preventing fire or damage.

    It operates together with a zero-sequence current transformer (CT) and is widely used in industrial power distribution and motor protection systems.

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    2. Technical Specifications (Typical)

    Parameter	Description
    Model	IWX161A-1
    Type	Ground fault / earth leakage relay
    Measuring principle	Zero-sequence current measurement with external CT
    Power supply	110–240 V AC/DC
    Measuring range	mA to A level (depending on CT)
    Trip current setting	Adjustable
    Time delay	Adjustable
    Output contacts	1–2 relay outputs (alarm / trip)
    Mounting	DIN rail or panel mount
    Indication	LED status indicators
    Reset	Automatic or manual
    Operating environment	Industrial grade

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    3. Key Advantages

    • High sensitivity for early detection of earth leakage

    • Fast response to protect equipment and personnel

    • Industrial-grade reliability with strong EMI resistance

    • Flexible settings for trip current and delay

    • Compatible with various zero-sequence CTs

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    4. Typical Applications

    The IWX161A-1 is used in:

    • Low-voltage and medium-voltage distribution systems

    • Motor and VFD power circuits

    • Pumps, fans, compressors

    • Power plants, petrochemical plants, steel mills

    • Ground fault monitoring in switchgear and substations

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    5. Installation Notes

    • Must be used with a correctly selected zero-sequence CT.

    • CT polarity and installation direction must be correct.

    • Set trip current and delay according to system grounding method.

    • Ensure all wiring is secure and CT secondary is never open-circuited.

    • Periodically test the relay for correct operation.

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