Products and standards
An EIS is composed of a unique combination of materials that have been verified for chemical compatibility when used at certain maximum temperatures. These combinations are arranged to form insulation systems such as those used in motors, transformers, solenoids, etc. All systems 600 volts or less are Recognized by UL for use above Class 105(A) limits. These systems have been tested in accordance with UL 1446, Standard for Safety of Systems of Insulating Materials -- General. UL 1446 also serves as the model for the following international standards:
|IEC 62114||Electrical Insulation Systems -- Thermal Classification|
|IEC 60505||Evaluation and Qualification of Electrical Insulation|
|IEC 61857||Electrical Insulation Systems -- Procedures Part 1: General Requirements-Low Voltage|
|IEC I61857-21||Electrical Insulation Systems -- Procedures Part 21: Specific Requirements for General Purpose Model-Wire Wound Applications|
|IEC 61858||Electrical Insulation Systems -- Thermal Evaluation of Modification to an Established Wire-Wound EIS|
UL groups Recognized systems into two product categories, identified by the alphanumeric category control numbers (CCNs) below:
- Systems, Electrical Insulation (OBJY2) -- Informational category for insulation systems built around a supplier's components and evaluated. The UL Recognized EIS is made available for coil manufacturers' use.
- System Components, Electrical Insulation (OBJS2) -- UL Recognized insulation systems used in facilities where coil is produced. These systems are either evaluated for coil manufacturers or adopted from an OBJS2 supplier.
System components for electrical insulation systems (OBJS2) that are available for adoption by coil manufacturers can be quickly identified in UL's online EIS database.