NEMA Motors and Generators Standard Revises Four Sections

NEMA Motors and Generators Standard Revises Four Sections

This piece was originally published in the May/June 2019 issue of electroindustry.

Ann Brandstadter, Manager, Standards Publications and Marketing, NEMA

ANSI/NEMA MG 1 Motors and Generators assists users in the proper selection and application of motors and generators. It contains practical information concerning performance, safety, testing, and manufacture of ac and dc motors and generators.

MG 1 now includes 2018 updates to Parts 7, 12, 30, and 31:

  • Harmonization of MG 1 Part 7 with vibration requirements in IEC 60034
  • Current industry practice to test for energy- efficiency regulatory compliance only at the voltage marked in the “rated voltage” field of the motor nameplate
  • Maximum locked rotor current requirements for fire pump motors have reverted back to those specified in NEMA MG 1-2014
  • Use of coupling capacitors for PD detection (Parts 30 and 31)

MG 1-2016 is available for $565 in hard copy and electronic download at https://www.nema.org/Standards/Pages/Motors-and-Generators.aspx.

Other recently published Standards:

NEMA PE 7-2018 Communications Type Battery Chargers is available for $86 in hard copy and as an electronic download at no cost.

ANSI C37.50-2018 Low Voltage AC Power Circuit Breakers Used in Enclosures—Test Procedures and

ANSI C37.51-2018 Metal-Enclosed Low Voltage AC Power Circuit Breaker Switchgear Assemblies— Conformance Test Procedures are each available for $84 in hard copy and as an electronic download at no cost.

NEMA/MITA 2-2019 Requirements for Servicing of Medical Imaging Equipment is available as an electronic download at no cost.

NTCIP 1202 v03 Object Definitions for Actuated Signal Controllers (ASC) Interface is available for $255 in hard copy and as an electronic download.

NEMA ESS 1-2019 Standard for Uniformly Measuring and Expressing the Performance of Electrical Energy Storage Systems is available for $150 in hard copy and as an electronic download. ei

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