✅ 50440 – Schneider Electric MA120 Closed Toroid (VigiPacT / Vigilohm, 120 mm, 250 A) The Schneider Electric 50440 refers to the MA120 closed toroid A-type sensor, part of the VigiPacT and Vigilohm series, designed for advanced residual current monitoring and earth-fault detection in large-scale low-voltage electrical systems. With a 120 mm internal diameter and a 250 A rated current, the MA120 is ideal for applications involving large cable bundles or busbars, delivering reliable fault detection with minimal signal distortion. Engineered for use with protection relays such as the RH99M, this toroid sensor plays a vital role in preventing equipment damage, fire hazards, and service interruptions in high-power installations. 🔧 Technical Specifications: Specification Details Part Number 50440 Model MA120 Brand Schneider Electric Series VigiPacT / Vigilohm Product Type Closed Toroid A-Type Internal Diameter 120 mm Rated Current 250 A Construction Closed-loop toroid Compatible Relays RH99M, VigiPacT monitoring relays Mounting Panel mount or enclosure-fixed Standard Compliance IEC 61557, IEC 62020 🌟 Key Features: ✅ Wide 120 mm Aperture supports large power conductors and busbars. ✅ High Current Rating (250 A) for medium to heavy-duty installations. ✅ Closed-Type Core Design ensures excellent measurement accuracy. ✅ Optimized for Use with RH99M and Similar Earth-Leakage Relays. ✅ Ideal for Industrial, Utility, and Infrastructure Protection Systems. 🧰 Applications: Ground fault monitoring in main distribution boards Substations and large motor control centers (MCCs) Power transformers and busbar protection systems Integration into industrial process lines and infrastructure panels Safety-critical low-voltage networks