O. Rotating Machinery

1. Properties and Types

Identify properties, types, and applications ^{2, 3, 4}

• NEMA MG 1 Motors and Generators ^2 3 4
• The Basics of AC Motors
• Motor Efficiency, Power Factor, and Load
• Guidelines for motor application designs
• Direct Current Motor Basics
• Differentiating Between DC and AC Motors
• Understanding Induction Motor Nameplate Information
• 5 most common motor load types
• The basics of three-phase AC motors
• AC motor selection and application guide
• 5 Steps To Choose Best Motor For Your Application

2. Inspection and Test Procedures

Apply visual and mechanical inspections ^{2, 3, 4}

• NFPA 79 Electrical Standard for Industrial Machinery ⁴
• NFPA 70B: Chapter 25 Rotating Equipment ^2 3 4
• NFPA 70 2017: Article 430 Motors, Motor Circuits, and Controllers ^2 3 4
• Motors and the NEC
• Using motors in wet and damp environments
• Selection of Induction Motors for Industrial Applications

Employ methods and procedures for electrical tests ^{2, 3, 4}

Important Standards

• IEEE 43 Recommended Practice for Testing Insulation Resistance of Electric Machinery ^2 3 4
• NFPA 70B: Chapter 11.20 Rotating Machine Testing ^2 3 4

Motor Testing

• Understanding Complete Tests Performed On Induction Motors
• Regular Motor Maintenance To Avoid Failure
• How to measure insulation resistance of a motor
• Inspection and test procedures for Rotating Machinery, Synchronous Motors and Generators
• Testing and commissioning procedure for electric motors
• VLF testing on motors and generators

3. Interpretation of Test Results

Evaluate results of electrical tests ^{2, 3, 4}

• NETA-ATS 2017: Section 7.15 Rotating Machinery ^2 3 4
• NETA-MTS 2019: Section 7.15 Rotating Machinery ^2 3 4
• A Review of Polarization Index and IEEE Std. 43-2000
• How Many Megohms Does it Take to Start a Motor?
• Why does electric motor fail and what can you do about it?
• Combustion Turbine Generator Trip Analysis

Last Update: Feb 02, 2025