Ding. Brownies are Done. (Cooked Motor)

Hello,

Check this out. Questions/discussion follow.

What is the goop that bubbled out of it onto the rotor and the winding wraps? I am assuming this gunk was a result of overheating and not the reason for the stall. By the way, it's a small 1HP 3PH motor that was actually phased for reverse when it was cooked, but the pump rotates in reverse and shouldn't have stalled it. The machine was sent from Europe and is dual rated for 50 or 60 Hz, specced OK at 380V for both frequencies (this was the voltage applied). Less torque at 60Hz is noted, but the replacement motor works great.

Just curious..? Thanks.