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Rotating Equipment

Variable Frequency Drive (VFD)

Adjustable-speed power drive system for AC motors.

Category
Rotating Equipment
Subcategory
Driver
Applicable standards
5
Issuing bodies
4

Description

Adjustable-speed power drive system for AC motors.

Applicable Standards (5)

API — 2 standards

API 547 General-Purpose Form-Wound Squirrel-Cage Induction Motors — 250 hp through 3000 hp
Edition: 2nd Edition (2014, R2019) Region: USA, Global
Mid-range form-wound induction motors.
API 541 Form-wound Squirrel-Cage Induction Motors — 375 kW (500 hp) and Larger
Edition: 5th Edition (2014, R2020) Region: USA, Global
Large form-wound induction motors for refinery / petrochemical service.

IEC — 1 standard

IEC 61800 (series) Adjustable speed electrical power drive systems
Edition: Parts 1–9 Region: Global
VFD performance, EMC, functional safety (IEC 61800-5-2), efficiency.

NEMA — 1 standard

NEMA MG 1 Motors and Generators
Edition: 2021 Region: USA, Global
Performance, dimensions and ratings of electric motors and generators (NEMA frame).

IEEE — 1 standard

IEEE 519 Recommended Practice and Requirements for Harmonic Control in Electric Power Systems
Edition: 2022 Region: USA, Global
Voltage and current harmonic limits at PCC.