Confirmed Gap-Fill (was missing from both prior files) - Adjustable, Not UL Listed
Eaton Series C KT2400TA K-Frame Adjustable Trip Unit
The Eaton KT2400TA is a 2-pole, 400A adjustable-thermal trip unit for Series C K-Frame breakers. Adjustable thermal range 315 - 400A. Not UL listed (special calibration).