Power Transformers

Michael Faraday lecturing at the Royal Institution*

Today at 16:00 UTC we pick through specifics appearing in the US Department of Energy Notices of Proposed Regulations linked below:

2023-02-22 Energy Conservation Program: Energy Conservation Standards for Distribution Transformers; Extension of Public Comment Period; Notice of proposed rulemaking; extension of public comment period

2023-01-11 Energy Conservation Program: Energy Conservation Standards for Distribution Transformers; Notice of proposed rulemaking and announcement of public meeting

Public consultation closes March 27th unless another extension is granted.

LINK TO COMMENT: EERE-2019-BT-STD-0018-0065

It is not coincidental that we selected this topic for today’s colloquium because of today’s coincident meetings of the IEEE Education & Healthcare Facilities Committee.  Many of our colleagues over the years will understand our interest in this issue.

At first reading we see the US Department of Energy running through the same  bunnyholes incumbent stakeholders have set for them for decades.   We will start with the catalogs of the following standards developers:

Institute of Electrical and Electronic Engineers

International Electrotechnical Commission

National Electrical Manufacturers Association

National Fire Protection Association.

You are welcomed to join us today with the login credentials at the upper right of our home page; open to everyone.

Rightsizing Electrical Power Systems

* Alternating current (AC) transformers are electrical devices that are used to transfer alternating electrical energy from one circuit to another through electromagnetic induction. The main physical principles underlying AC transformers are:

1. Electromagnetic Induction: AC transformers rely on electromagnetic induction to transfer energy from one circuit to another. Electromagnetic induction is the process by which a changing magnetic field induces an electric current in a conductor. In a transformer, an alternating current flowing through the primary coil creates a changing magnetic field, which induces an alternating current in the secondary coil.
2. Faraday’s Law of Induction: Faraday’s Law states that the magnitude of the induced voltage is proportional to the rate of change of the magnetic field. In a transformer, this means that the voltage induced in the secondary coil is proportional to the rate of change of the magnetic field created by the current flowing in the primary coil.
3. Lenz’s Law: Lenz’s Law states that the direction of the induced current is such that it opposes the change in magnetic field that produced it. In a transformer, this means that the current induced in the secondary coil is in the opposite direction to the current flowing in the primary coil.
4. Mutual Inductance: Mutual inductance is a measure of the degree of coupling between two coils. In a transformer, the mutual inductance between the primary and secondary coils determines the amount of energy transferred between the two circuits.
5. Conservation of Energy: Finally, transformers obey the principle of conservation of energy, which states that energy cannot be created or destroyed, only transformed from one form to another. In a transformer, the energy transferred from the primary circuit to the secondary circuit is equal to the energy received by the secondary circuit.

Education & Healthcare Facility Electrotechnology Committee

The Royal Institution Lecture Theatre (Then & Now)
Here Michael Faraday first demonstrated electromagnetism (3 September 1821)https://t.co/DiX93SKuIchttps://t.co/2gpJzTkL6L@IEEECampus https://t.co/gkB8BpLJET pic.twitter.com/3AUm6bhR4V

— Standards Michigan (@StandardsMich) March 7, 2023