Rotating electrical machines - Part 26: Effects of unbalanced voltages on the performance of three-phase cage induction motors
(Machines electriques tournantes - Partie 26: Effets d´un systeme de tensions desequilibrees sur les caracteristiques de fonctionnement des moteurs a induction a cage triphases)

Standard published on 16.1.2026

Rotating electrical machines - Part 26: Effects of unbalanced voltages on the performance of three-phase cage induction motors

Standard published on 16.1.2026

Rotating electrical machines - Part 27-1: Off-line partial discharge measurements on the winding insulation
(Machines electriques tournantes - Partie 27-1: Mesurages a l’arret des decharges partielles effectues sur le systeme d´isolation des enroulements)

Standard published on 13.12.2017

Rotating electrical machines - Part 27-2: On-line partial discharge measurements on the stator winding insulation
(Machines electriques tournantes - Partie 27-2: Mesurages en fonctionnement des decharges partielles effectues sur le systeme d’isolation)

Standard published on 7.12.2023

Rotating electrical machines - Part 27-3: Dielectric dissipation factor measurement on stator winding insulation of rotating electrical machines
(Machines electriques tournantes - Partie 27-3: Mesure du facteur de dissipation dielectrique sur le systeme d´isolation des enroulements statoriques des machines electriques tournantes)

Standard published on 16.12.2015

Rotating electrical machines - Part 27-4: Measurement of insulation resistance and polarization index of winding insulation of rotating electrical machines
(Machines electriques tournantes - Partie 27-4: Mesure de la resistance d’isolement et de l’index de polarisation sur le systeme d’isolation des enroulements des machines electriques tournantes)

Standard published on 24.1.2018

Rotating electrical machines - Part 27-5: Off-line measurement of partial discharge inception voltage on winding insulation under repetitive impulse voltage

Standard published on 7.4.2021

Rotating electrical machines - Part 27-6: On-line partial discharge measurements of rotating machine windings supplied from a converter

Standard published on 20.5.2026

Rotating electrical machines - Part 28: Test methods for determining quantities of equivalent circuit diagrams for three-phase low-voltage cage induction motors
(Machines electriques tournantes - Partie 28: Methodes d´essai pour la determination des grandeurs des schemas d´equivalence des circuits pour moteurs a induction a cage basse tension triphases)

Standard published on 13.12.2012

Rotating electrical machines - Part 29: Equivalent loading and superposition techniques - Indirect testing to determine temperature rise
(Machines electriques tournantes - Partie 29: Techniques par charge equivalente et par superposition - Essais indirects pour determiner l´echauffement)

Standard published on 11.3.2008