trip unit accessory – ZSI module – for NSX100..630
The ZSI (Zone Selective Interlocking) module is a trip unit accessory designed for use with ComPact NSX circuit breakers ranging from NSX100 to NSX630.
Key Features:
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Function: Enables Zone Selective Interlocking (ZSI) to reduce fault-clearing time by allowing upstream breakers to coordinate with downstream units
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Compatibility: Suitable for ComPact NSX100, NSX160, NSX250, NSX400, and NSX630 circuit breakers equipped with compatible MicroLogic trip units
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Improved Protection: Enhances system selectivity and safety by ensuring fast and precise isolation of faults
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Installation: Easily integrates into the trip unit as an add-on accessory
Ideal for applications requiring high-performance fault discrimination and minimal system disruption, the ZSI module improves overall protection coordination in low-voltage distribution networks






















