What is BS EN 60034-27-3 – Rotating electrical machines about?
BS EN 60034-27-3 is a part of the BS EN 60034 standard that discusses the dielectric dissipation factor measurement on stator winding insulation of rotating electrical machines for rotating electrical machines. The rotating machine produces the electromotive force that moves in the magnetic field, which generates electrical currents through the conductors.
BS EN 60034-27-3 provides guidelines for the test procedures and the interpretation of test results for dielectric dissipation factor measurements on the stator winding insulation of rotating electrical machines. These guidelines are valid for rotating electrical machines with conductive slot coatings operating at a rated voltage of 6 kV and higher.
BS EN 60034-27-3 applies to individual form-wound stator bars and coils outside a core (uninstalled), individual stator bars and coils installed in a core and complete form-wound stator winding of machines in new or aged condition. BS EN 60034-27-3 applies to all kinds of vacuum impregnated or resin-rich (fully loaded) taped bars, coils and complete windings. It is not applicable to non-impregnated individual bars and coils or non-impregnated complete windings.
Who is BS EN 60034-27-3 – Rotating electrical machines for?
BS EN 60034-27-3 on rotating electrical machines that applies to:
- Manufacturer of rotating machines and electric motor
- Electrical engineer
- Suppliers of machines and motors
- Quality testing personnel
Why should you use BS EN 60034-27-3 – Rotating electrical machines?
The dielectric dissipation factor is the tangent of the dielectric loss angle δ (complement of the insulation power factor angle) at predetermined values of temperature, frequency, and voltage or dielectric stress.
BS EN 60034-27-3 provides you with the guidance of a Dielectric dissipation factor measurement at voltages below the inception of partial discharges representing the magnitude of dielectric losses in the solid insulation (dielectric absorption and conductive losses) and the conditions of electrical contact to the earthed measuring electrode. The dielectric dissipation factor component arising from the dielectric losses generally changes very little with voltage, but a significantly higher than normal loss measured indicates some difference in the structure of the insulation, such as may arise from incorrect resin composition or inadequate cure.
BS EN 60034-27-3 provides test procedures where the dielectric dissipation factor test applies to stator winding components (bars or coils) in which the insulation is cured. This test is used for single vacuum pressure impregnated or resin-rich (fully-loaded) bars, coils and complete windings including global vacuum pressure impregnation (VPI) technology.
BS EN 60034-27-3:2016 provides you with comprehensive guidance useful for the Dielectric dissipation factor measurement on stator winding insulation of rotating electrical machines.
What’s changed since the last update?
BS EN 60034-27-3:2016 cancels and replaces the first edition of IEC 60034-27-3:2015. It includes:
- Digital measurement of dissipation factor and capacitance included
- Limits for dissipation factor values given
- Detailed description of measuring techniques
- Extension of scope to complete windings.