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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

standard by IEEE, 08/24/2022

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Full Description

Scope

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.

Purpose

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.

Abstract

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.
 

Product Details

Published:
08/24/2022
ISBN(s):
9781504484565, 9781504484572, 9781504489331
Number of Pages:
30
File Size:
1 file , 2.6 MB
Product Code(s):
STD25254, STDPD25254, STDPL25588
Note:
This product is unavailable in Russia, Ukraine, Belarus
 

Document History

  1. IEEE 433-2022

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

    • Most Recent

  2. IEEE 433-2009


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

    • Historical Version

  3. IEEE 433-1974


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

    • Historical Version