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Closed Toroid A Type, MA120, Inner Diameter 120mm, Rated Current 250A
The MA120 closed toroid is specifically engineered for use with Vigilohm Insulation Fault locators and VigiPacT type A residual current protection and monitoring relays. It facilitates the monitoring of the injected component from the Vigilohm Insulation Monitor, supporting up to a rated current of 250A for effective monitoring and protection.
With an inner diameter of 120 mm, this toroid has a weight of 0.450 kg. The cables must be properly centered within the toroid, ensuring that their combined outer diameter does not exceed 60 mm. The maximum cross-sectional area per phase (R, S, T, N) for copper conductors is 240 mm², allowing for substantial current handling capabilities.
Operating within a temperature range of -35 to 70 °C, the MA120 is compliant with various environmental standards, including IEC 60947-2. It is designed to withstand exposure to damp heat and salt mist, classified under pollution degree level 3 as per IEC 60664-1. The product features a transformer ratio of 1/1000, making it suitable for various applications in equipment monitoring and control.
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Schneider Electric
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The MA120 closed toroid plays a crucial role in electrical safety and monitoring applications, particularly in conjunction with VigiPacT residual current protection relays. Its ability to monitor insulation faults and provide critical data for equipment control makes it an essential component in electrical systems. The product's robust design, including compliance with IEC standards and a rated operational current of 250A, underscores its effectiveness in demanding environments.

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