Impulse (BIL) Testing Reactors & Transformers: A Short Explanation

Docta Reacta: Power Magnetics was in the news again recently, this time for BIL testing. In case you missed it, this is just a quick update on some news you may be able to use, intended to help you be smarter buyers of magnetics. If you want to read the article, check out the links below – including the one on the Institute Blog. Don’t miss the links to the photos[…]

‘Docta Reacta’ Publishes e-Book on Harmonic Filter Reactors

Docta Reacta:  I am pleased to announce that I am publishing The Power Magnetics, Inc. Institute’s first e-book.  It is entitled “Understanding the Advantage In Power Magnetics, Inc. Medium Voltage Harmonic Filter Reactors.”  It is designed to help the reader, in particular, the OEM understand the advantages to the Power Magnetics design, construction and manufacturing methods used to produce what is rapidly becoming the “defacto” industry standard for medium voltage[…]

Cooling Considerations for CLR’s in NEMA 3R Enclosures

Docta Reacta: Current Limiting Reactors, also known as CLRs, are most frequently sold in NEMA 3R enclosures and used in some pretty demanding environments, usually coal fired power plants. First, let’s discuss clearances for the enclosure. In this case, clearances for reactors within enclosures are dictated by the voltage class, not cooling requirement. For 600 volt class, one inch of clearance is all that is required. Cooling considerations dictate ventilation[…]

Power Magnetics, Inc. Quality Statement

Power Magnetics is known throughout the power industry for supplying high quality premium custom designed transformers and reactors.  We thought you might be interested in our Quality Statement that guides the work we do and our relationship with customers.  We hope that when you consider your next purchase of a transformer, AC reactor or DC inductor, you will give Power Magnetics, Inc. serious consideration, especially in those applications where efficiency[…]

Design Criteria for Iron Core Reactors for Harmonic Filter Bank Applications

Prafessa Reacta with you today. The design criteria for harmonic reactors are driven by the harmonic spectrum provided along with current rating, inductance, temperature rise, taps and impulse rating. The following considerations apply equally to both the single phase harmonic reactor and the three phase harmonic reactor when used in harmonic filter banks. Harmonic filter reactor current ratings are typically based on the following considerations: The reactor core will not[…]

General Specifications for Iron Core Reactors in Harmonic Filter Bank Applications

Docta Reacta:  Continuing our discussion, I thought we should provide you with some of the trade-offs when using harmonic filter reactors in harmonic filter bank applications. The construction methods for trap reactors lend themselves to a substantial flexibility in specifications and ratings.  For filter bank applications, single phase iron core reactors are most often utilized because of the flexibility and inherently higher ratings.  Copper winding is frequently chosen when performance[…]

Iron Core Reactors for Harmonic Filter Bank Applications – Part 2

Docta Reacta: Here is more enlightenment and edification on the trade-offs between three phase reactors and single phase reactors, harmonic filter reactors if you will, when used in harmonic filter banks.  Iron core reactors can be designed as either single phase or three phase.  There are trade-offs for each reactor type summarized below.   It may appear that there is a bias towards single phase reactors, and certainly these is more[…]

Iron Core Reactors for Harmonic Filter Bank Applications – Part 1

Docta Reacta:  Today I would like to provide some elucidation and enlightenment on iron core reactors when they are used in harmonic filter banks! When OEM’s are looking for high reliability filter bank reactors, it comes down to a simple choice: Power Magnetics. Why? Because we have a very long history of providing iron core reactors, sometimes called harmonic filter reactors, to the manufacturers of harmonic filter banks that go into some of the most difficult applications[…]

The Anatomy of Stray Flux in 3 Phase Reactors

Docta Reacta: Hey, hey, nice to be back in front of the class at the Power Magnetics Institute of higher learning for your increased enlightenment and edification as I illuminate you with some technical elegance! Hmmm…. Overboard I hear, ringing in my ears! The discussion of stray flux in the design and application of 3 phase reactors is insufficiently addressed by systems engineers when trying to deploy them in more[…]

A Video Explanation of Single Phase Trap Reactors

A Video Explanation of Single Phase Trap Reactors

  Docta Reacta:  Welcome dear PMI Institute learners!  Today I have a treat for you!  PMI’s very own Mike Smith, an up and coming star with Hollywood potential, I am sure you will agree, will provide you with a illuminating discussion of Power Magnetics Inc.’s Single Phase Trap Reactors. These medium voltage trap reactors have become the industry standard and as I have explained in previous posts, are nearly indestructible[…]