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The insulated arm that connects to the CBC operator to the movable blades/contacts on this bolted pressure switch (Manufactured by Pringle) is broken. Due to this the movable blases are not hitting the cam stops properly, this is resulting in the blades not being fully closed on "B" phase.

While the broken arm is not visible in the IR opicture it is obviuos in the real time picture. Center bottom red vertical fiber arm. This is extremly critical not just because of the thermal issue (which will only get worse as time passes, if not repaired). But this is a Main Line Service Disconnect on a 2000 Amp 480/277 VAC service, with NEC required GFP. Should this switch try to open from a GFP operation (or human interface) the results could be devasting.

- BGaquin (Brian)

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