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IEEE 433-2009

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IEEE Recommended Practice for Insulation Testing of Large AC Rotating Machinery with High Voltage at Very Low Frequency

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Revision Standard - Inactive-Reserved. This recommended practice describes 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%.
The purposes of this recommended practice are 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 have specific meaning in VLF testing

SDO IEEE: Institute of Electrical and Electronics Engineers
Document Number 433
Publication Date Feb. 24, 2010
Language en - English
Page Count 30
Revision Level
Supercedes
Committee Electric Machinery
Publish Date Document Id Type View
Feb. 24, 2010 433-2009 Revision
Dec. 18, 1974 433-1974 Revision