Installation & Maintenance Instructions for AC Induction Motors
This technical document provides essential installation and maintenance procedures for AC induction motors, covering topics such as lubrication schedules, wiring guidelines, recommended copper wire sizes, and motor-to-transformer distance charts. Ideal for technicians, engineers, and maintenance professionals working with fractional to large-frame AC motors.
Key Points
- Lubrication Guidelines: Includes detailed intervals and procedures for relubricating motors based on horsepower, service hours, and environmental conditions.
- Electrical Wiring Instructions: Outlines steps for safe and compliant wiring following the National Electrical Code.
- Bearing Grease Types: Lists approved lubricants like Shell Dolium R and Chevron SR1 2 suitable for various insulation classes.
- Wire & Transformer Sizing Charts: Provides tabular data for appropriate copper wire gauges and transformer ratings based on motor size and distance.
- Installation Checks: Highlights pre-installation inspections such as shaft rotation and electrical grounding.
- Mounting Recommendations: Emphasizes secure mounting and sufficient ventilation for optimal motor performance.
- Motor Frame-Specific Procedures: Differentiates lubrication methods for NEMA frames from sub-fractional up to 447T.
- Cautionary Notes: Warns against mixing lubricant types and stresses lubrication only while motors are at a standstill.