A uniform procedure for making corona (partial discharge) measurements by electrical means on electronic transformers is presented. Methods of applying voltage stress, the use of a sine-wave voltage to simulated dc and ac combinations, the types and limitations of voltage stresses encountered, and the acceptable limits of discharge pulse energy are included. Recommended test conditions and the need for negotiation of special tests are discussed. Test apparatus and calibration are described. The aim is to establish a common ground of understanding between transformer and systems design engineers and transformer manufacturers in the development of service and performance requirements.
- Standard Committee
- PEL/SC - Standards Committee
- Status
- Inactive-Reserved Standard
- PAR Approval
- 1988-03-10
- Superseding
- 436-1977
- Board Approval
- 1991-02-11
- History
-
- ANSI Approved:
- 1991-06-28
- Published:
- 1991-05-07
- Reaffirmed:
- 2007-12-05
- Inactivated Date:
- 2019-11-07
Working Group Details
- Society
- IEEE Power Electronics Society
- Standard Committee
- PEL/SC - Standards Committee
- Working Group
-
ET_WG - Electronic Transformer Working Group
- IEEE Program Manager
- Patricia Roder
Contact Patricia Roder - Working Group Chair
- Matthew Wilkowski
Other Activities From This Working Group
Current projects that have been authorized by the IEEE SA Standards Board to develop a standard.
No Active Projects
Standards approved by the IEEE SA Standards Board that are within the 10-year lifecycle.
No Active Standards
These standards have been replaced with a revised version of the standard, or by a compilation of the original active standard and all its existing amendments, corrigenda, and errata.
No Superseded Standards
These standards have been removed from active status through a ballot where the standard is made inactive as a consensus decision of a balloting group.
No Inactive-Withdrawn Standards
These standards are removed from active status through an administrative process for standards that have not undergone a revision process within 10 years.
295-1969
IEEE Standard for Electronics Power Transformers
Application guidance and test procedures are given for power transformers and inductors that are used in electronic equipment and supplied by power lines or generators of essentially sine-wave or polyphase voltage. Provision is made for relating the characteristics of transformers to the associated rectifiers and circuits. This standard includes, but is not limited to, the following transformers and inductors: rectifier supply transformers for either high- or low-voltage supplies, filament and cathode heater transformers, transformers for alternating-current resonant charging circuits, inductors used in rectifier filters, and autotransformers with fixed taps.
390-1987
IEEE Standard for Pulse Transformers
Pulse transformers for use in electronic equipment are considered. This standard applies to the following transformer types: power output (drivers), impedance matching, interstage coupling, current sensing, and blocking-oscillator transformers. For these transformers, the peak power transmitted ranges from a few milliwatts to many kilowatts, and the peak voltage transmitted ranges from a few volts to many kilovolts. Symbols, performance tests, equivalent circuits, preferred test methods, marking, and service conditions are covered.
449-1998
IEEE Standard for Ferroresonant Voltage Regulators
Ferroresonant transformers used as regulators in electronic power supplies and in other equipment are covered. Guides to application and test procedures are included.