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IEEE 433-2022

IEEE Recommended Practice for Insulation Testing of AC Electric Machinery with High Voltage Rating up to 30 kV at Very Low Frequency
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IEEE 433-2022

IEEE Recommended Practice for Insulation Testing of AC Electric Machinery with High Voltage Rating up to 30 kV at Very Low Frequency

PUBLISH DATE 2022
PAGES 30
IEEE 433-2022
Revision Standard - Active. Described in this recommended practice are very low frequency withstand and diagnostic tests that are performed on the stator windings of ac electric machines.
This document describes very low frequency (VLF) testing of ac electric machines. It covers acceptance testing of new machines in the factory or on-site after erection. Also covered is the routine maintenance testing of machines that have been in service. In order to facilitate communication and comparison among investigators, this document recommends that the VLF used be 0.1 Hz ±10%. For ac electric machines, voltages between 3.3 kV to 30 kV are considered to be high voltage machines.
The purpose of this recommended practice is as follows: a) To provide a uniform procedure for testing the stator (armature) insulation of ac electric machines with VLF voltage, in order to obtain consistent results. b) To recommend constants for relating VLF tests to power-frequency and direct-voltage tests to obtain equally effective test levels. c) To describe VLF test equipment and wave shape. d) To define terms that has specific meaning in VLF testing.
SDO IEEE: Institute of Electrical and Electronics Engineers
Document Number 433
Publication Date Aug. 24, 2022
Language en - English
Page Count 30
Revision Level
Supercedes
Committee Electric Machinery
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