3M™ CeQUIN and CeQUINBORD Inorganic Insulating Papers are designed to provide high-temperature performance in electrical insulation systems. CeQUIN papers have undergone extensive thermal aging evaluation per UL 1446, “Standard for Systems of Insulating Materials – General,” and as a result are UL Recognized as suitable for use as major ground insulation in systems rated through Class 220(R).
Several UL Recognized Insulation systems are listed under IPT File No. E65007 in the OBJS2 category for Class 130(B), Class 155(F), Class 180(H), and 220(R) applications. This open file is free for use by any electrical apparatus manufacturer by contacting the nearest UL office. This file is also recognized by UL as being in compliance with International Electrotechnical Commission (IEC) Publication 85, “Thermal Evaluation and Classification of Electrical Insulation.”