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  1. SEL487

    (Ontario) ESA banning S&C Vista Units after May 1st, 2025

    From the ESA Dear Manufacturer: The Electrical Safety Authority (ESA) has been dealing with pad-mounted gas insulated switchgears (GIS) for non-utility applications. A few concerns have been identified: not meeting the requirements of CSA 22.2 No. 31 standard and the Ontario Electrical Safety...
  2. SEL487

    SEL-351S CT Saturation Protection can someone explain simply ?

    Why contact Basler for a SEL-351S relay? Does the engineer have access to software to model the TCCs? You're right to call them out on it.
  3. SEL487

    Directional earth fault protection ( 67N)

    Which relay are you using?

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