Insulation Systems: Five specialized elements are used, which together constitute the motor's INSULATION SYSTEM. The following are typical in an AC motor: 1. TURN-TO-TURN INSULATION between separate wires in each coil. (Usually enamel on random wound coils of smaller motors - tape on 'form wound' coils of larger motors.) 2. PHASE-TO-PHASE INSULATION between adjacent coils in different phase groups. (A separate sheet material on smaller motors - not required on form wound coils because the tape also performs this function.) 3. PHASE-TO-GROUND INSULATION between windings as a whole and the 'ground' or metal part of the motor. (A sheet material, such as the liner used in stator slots, provides both di-electric and mechanical protection.) 4. SLOT WEDGE to hold conductors firmly in the slot. 5. IMPREGNATION to bind all the other components together and fill in the air spaces. (A total impregnation, applied in a fluid form and hardened, provides protection against contaminants.

 

Related Words

Insulation Systems: Five specialized elements are used, which together constitute the motor's INSULATION SYSTEM. The following are typical in an AC motor: 1. TURN-TO-TURN INSULATION between separate wires in ea . . . View Full Definition

Open Systems Interconnection (OSI): A reference model developed by the International Organization of Standardization. It splits networking into seven layers which provide specific services and communications standards.

Low-Flow Irrigation Systems: These systems (drip, trickle, and micro sprinklers) provide water in small volumes and generally provide water to plants with less waste than furrow irrigation. Drip and trickle systems appl . . . View Full Definition

Just-In-Time Inventory Systems: Systems that schedule materials to arrive exactly when they are needed in the production process.