Midwest Current Transformer has been an industry leader in design and production of current transformer products for over 50 years. Our focus is to build quality products designed to meet your needs. You may choose from any of our standard products or we can design and build a custom solution specifically for your application.

Superior Goals and Higher Expectations

It is the goal of Midwest Current Transformer to maintain its position as a worldwide industry leader . . .

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CT Series Current Transformer

CT Series Current Transformer

The CT Series offers a wide range of standard ratios to 1 amp and 5 amp secondary outputs.

Standard units are manufactured with 24 inch leads, 600 volt fiberglass insulation wrap and a protective polyurethane coating.

Screw terminals, high voltage insulation, mounting brackets and ratios to 0.1 amp are available. Please specify when placing your order.

RC Series Current Transformer

RC Series Current Transformer

The RC Series offers a wide range of standard ratios to 1 amp and 5 amp secondary outputs.

Standard units are manufactured with 24 inch leads and a round polycarbonate case.

Mounting brackets and ratios to 0.1 amp are available. Please specify when placing your order.

SC Series Current Transformer

SC Series Current Transformer

The SC Series offers a wide range of standard ratios to 1 amp and 5 amp secondary outputs.

Standard units are manufactured with brass screw terminals and a square polycarbonate case.

Lead wires instead of screw terminals and ratios to 0.1 amp are available. Please specify when placing your order.

Custom Current Transformer

Custom Current Transformer

Midwest Current Transformer offers you a wide range of current transformers. Should a standard unit not meet your specific application, our experienced staff will design a custom current transformer for you.

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Premier Current Transformer Manufacturing Company

As a premier leader among current transformer suppliers, Midwest Current Transformer has served customers requiring high quality current transformer products for more than five decades. Our targeted focus is the manufacture of standard and custom design current transformer solutions to meet the requirements of a wide range of applications.

Customized Current Transformer Design

We offer pre-made current transformers to serve the needs of various power applications. Our team is able to customize your order in order to help you achieve the optimum current transformer solution in terms of size, ratio, accuracy, multiple taps, contacts, mounting options, and burden rating.

Our Electrical Current Transformer Construction

At Midwest Current Transformer, we manufacture the majority of our current transformers from cold-rolled grain oriented electrical steel (CRGO). The CRGO steel comprising our current transformers is rolled into your required inner and outer diameter dimensions which permits precise dimensioning and tight construction between layers. As an iron-silicon alloy, CRGO electrical steel provides high permeability and low core loss that enables greater efficiency and cost-effectiveness of the current transformer.

Total Quality Management

Our approach consists of Total Quality Management protocol in which our employees, customers, and suppliers are valued as an integral part of our successful process. Our standard for success is error-free performance with the commitment to error prevention and getting-the-job-done-right-the-first-time mindset.

Through hands-on product inspection as part of an entire quality management system, we strive for perfection at every stage of the manufacturing process before your products leave our hands. We push toward continual quality improvement, adherence to safety standards, and personnel development through high-value training across all levels of our operations.

Contact Us

For more information about the superior current transformer products we offer at Midwest Current Transformer, call us today at 800.893.4047 or email sales@aenpi.com.

Professional Engineering & Investigation Services

Anderson Engineering & Investigations are professional engineers experienced in manufacturing engineering, product and process failure mode analysis, electrical, mechanical, and forensic engineering including fire investigation services.

When you need answers you can trust, Anderson Engineering & Investigations will provide you with timely, understandable results.

Why Steve Fabry Works at Blaze Fire Investigation

Blaze Fe Investigation is now know as Anderson Engineering. (updated 6/28/17)

If you can imagine what 10 million gallons of water looks like after it has been sprayed on a fire in 15 below zero temperatures, then you can picture the fire scene where I first encountered Blaze Fire Investigation. The location was West Allis, Wisconsin where I was a police officer and detective. I was called to a fire scene on New Year’s Eve, along with others including representatives from the state fire marshal’s office and the ATF.

The fire scene was a large building that housed a hobby store, so there were many flammable substances contained within its inventory of model-making materials and supplies. Even before beginning the investigation, it was clear to see that there was heavy damage, including collapse of the roof, and it would most probably be a total loss. Add to that all the water that was used to extinguish the fire, and the below zero temperatures. It was a very daunting task to begin to analyze the scene.

Methodical and organized approach to fire investigation

Blaze Fire Investigation arrived representing the insurance company. Right from the start, I saw how they methodically and efficiently handled what needed to be done. They brought in an accelerant-sniffing dog. They set up a warm air fan to blow into the building to melt the ice. On stand-by was an excavation company with heavy equipment just in case it was needed to access the rest of the structure. They even set up a warming shed so that the people involved could better handle the sub-zero temperatures on this bitter cold New Year’s Day.

What impressed me the most about the work that Blaze Fire did during this investigation was their methodical, organized approach that showed that they were not going to take any shortcuts. At the same time, they had the resources and the expertise to arrive at the facts in an efficient manner. Not only did they call on in-house engineers but the investigator on the scene was herself, an electrical engineer, which meant they she was able to do an in-depth analysis in a relatively short period of time.

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Blaze and Bob Donate New American Flag

Blaze Fe Investigation is now know as Anderson Engineering. (updated 6/28/17)

Bob Leonard, founder of Blaze Fire Investigation, along with his wife, Danielle, and the team at Blaze Fire Investigation donated a huge 40'x24' United states flag to the Dousman, Wisconsin Fire Department. The donation celebrates Bob's 45 years of service to the department on the occasion of his retirement. Through the decades, Bob has filled different roles, most recently that of Assistant Chief. The flag will be hung from the department's aerial trucks for special events.

Read more about Bob Leonard's career on the Lake Country Now newspaper.

Marine Fire Investigation Scenes

Blaze Fire Investigation is now known as Anderson Engineering. (updated 6/28/17)

You might think that it’s redundant to talk about the scene of a boat fire, but marine fire investigation includes fire scenes that are above, below and out of the water.

The fire scene – below the water

Because the scene of a boat fire is usually on the water, there are inherent difficulties that are present in the analysis and recovery of the damaged vessel. If the boat has sunk, the investigation needs to begin by documenting the scene with underwater photographs. Depending upon how deep the water is, the spread diameter of debris can be quite extensive. In addition to providing valuable information about what happened to the boat, the photo documentation operates as a check system to assure that all possible artifacts have been recovered. Because of the movement of water, and the potential presence of vegetation and rugged underwater terrain, it isn’t always possible to collect all debris but that is the goal for this part of the marine fire investigation.

The fire scene – above the water

When a scene includes a vessel that is still on the water, investigators need to be cautious with their movements, determining if the boat is safe to enter. In addition, fluids within the various systems will leak into the void spaces in the vessel and migrate into the surrounding water creating an environmental issue. Containment of any spill will be necessary as will notification to the area Environmental Protection Agent or Water Reclamation District.

On or under the water, the next part of the investigation will take place on a hard deck. The process of moving the boat to the hard deck is complex requiring the expertise of marine salvagers. The weight of water from a split or sunk hull adds to the difficulty in bringing it to the surface or moving out of a marine or dock area. This process could further damage the boat as it is pulled from the water causing evidence to be lost. Custody of the boat is determined by the authority of jurisdiction. That authority will make decisions about the recovery process; who has custody of the watercraft; and what measures are necessary to assure security.

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Resistive Heating Origin and Cause Uncovered

Blaze Fire Investigation is now known as Anderson Engineering. (updated 6/28/17)


A Blaze Fire Investigator is called to the scene of an apartment fire. The area is nearly knee deep in debris and objects have been moved around, changing the scene. There is a clear fire pattern observed on a wall, pointing to the floor. A sofa is burned on one side and a window air conditioning unit is visibly melted.


This investigation needed to begin with an interview with the tenant. With his home unlivable because of the fire, he was not easy to find but when located through a relative, he was cooperative. The tenant was able to visually recreate the room and the placement of furniture that had been disturbed during the course of the fire fight. Although one would assume that the air conditioner would not be used on a cool day, the tenant was able to share that because the multi-family building was usually warm, that he did, in fact, leave the air conditioner on while he left to go to an appointment.

Our investigator carefully sifted through the debris and discovered a fire pattern from the window pointing away from the wall. While the window air conditioner exhibited damage on its exterior, it did not appear to have damage that emanated from within the unit. There were badly damaged extension cords and a power strip with numerous inputs on the floor.

In consultation with forensic engineering colleagues at Anderson Engineering of New Prague, our investigator was able to determine that the origin of the fire was one of the extension cords and the cause was resistive heating, or too much power traveling through the cord.

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NFPA 921 Guidelines Instrumental in Aiding Fire Investigation Outcomes

Blaze Fire Investigation is now known as Anderson Engineering. (updated 6/28/17)

In-depth knowledge of the NFPA 921 guide, regarding notification to interested parties in a fire investigation, is critical to establishing a potential path to recovery for our clients. In addition to determining cause of the fire, it is our goal to provide notice to the parties so that those involved are only those that are necessary, and that the fire scene is preserved as much as possible to allow everyone equal opportunity to participate in the investigation. Blaze Fire Investigation is able to expertly incorporate NFPA 921 with a combination of the expert skills of our on-site investigators and the availability of forensic engineering consulting through colleagues at Anderson Engineering of New Prague, Inc.

Determining origin - interviewing

Fire scenes come in all conditions, from very light damage to total destruction. Whatever the scene, our investigators know that the people involved can be quite upset and even traumatized by what has happened. As our investigators make contact with these people as they enter a scene, they reassure them about the purpose of the investigation, and with their forthright and nonthreatening manner, open the door to honest dialogue.

Blaze Fire Investigators use well-honed interviewing skills to ask the right questions that will uncover facts that move the investigation along. The questioning strategy might include reconstructing a visual of the objects in the scene. It could include a history of renovations or repairs that have been made to the property. Questions directed at behaviors and actions that occurred prior to the fire are very important to identifying potential causes of a fire.

Determining origin - forensics

As they sift through debris at a fire scene at the beginning of an investigation, Blaze Fire Investigators balance their goal of determining origin with the need to preserve evidence if a joint scene is required. This is where connections with forensic engineers at Anderson Engineering of New Prague, Inc. provide Blaze Fire with resources that other investigation companies do not have readily available. At any time, our investigators can consult with an electrical or mechanical engineer to better identify products and systems that may be involved.

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Blaze Fire Determined Origin and Cause Without Joint Investigation

Blaze Fire Investigation is now known as Anderson Engineering. (updated 6/28/17)


A fire started in the kitchen of a restaurant. Many artifacts were present that could possibly start a fire including food warmers, microwaves, gas oven and stove, the building wiring system, and light fixtures. A fire suppression system was also in place and may or may not have functioned as designed. Calling in representatives for all of these appliances and electrical systems would be costly and may not be necessary. Was it possible to determine the cause of the fire without destruction of artifacts in the event that a joint scene investigation is warranted?


An electrical engineer from our parent company, Anderson Engineering, was called in to provide additional forensic expertise to examine the debris and artifacts. Working in tandem, the fire investigator and the electrical engineer went through the debris. The Fire Department had examined building components, pieces of wiring and light fixtures as part of their investigation and created a separate artifact pile. In conjunction with a fire suppression expert, the fire investigator and electrical engineer concluded that the fire suppression system did not malfunction. The appliances were examined one by one.

The gas stove had the remains of a gray melted plastic material on it. Through interviews with the restaurant staff, it was determined that at the end of the day, the cook routinely used a plastic bussing bucket to carry soap and water to the griddle for cleaning. The bucket was usually set on the gas stove beside the griddle during cleaning. The pilot light provided a continual source of heat even when the burners were not lit.

The cause of the fire was the plastic bussing bucket that was left on the stove. The water evaporated and the plastic came to combustible temperature and ignited.

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How We Manage a Joint Fire Investigation Scene

Blaze Fire Investigation is now know as Anderson Engineering. (updated 6/28/17)

Fire investigation scene management

Managing a joint fire investigation scene in a methodical, organized manner keeps costs low for our clients. Our management creates efficiencies while getting the job done. Our first step is to determine if a joint investigation is needed. As we begin to examine the scene, we look for origin and cause. We rule out items that show zero evidence of involvement. This assures that we have the correct representation at the joint investigation. When the appropriate parties have been notified, it's our job to manage the scene so that everyone can have access to the information and evidence. This results in decisions that are made accurately and quickly.

Joint scene preparation

When artifact representatives arrive for the joint investigation, we provide them with a packet that contains the fire department incident report, a diagram of the scene, a protocol of how the scene will be excavated and how artifacts will be collected, any lab reports, and a synopsis of events prior, during and after the fire. Taking the time to gather this information efficiently answers questions that routinely arise in the investigation process and assures that everyone has the same baseline knowledge of the scene.

The scene itself is maintained and protected so that it is in the condition that it was when the fire department released the scene. If the fire department made any changes in the course of their own investigation, that is noted. Safety concerns are placarded as well as "Do Not Enter" signage in the area of origin. Barricade tape is placed around the area of origin. Plywood may be placed over door openings to limit access. We work with the restoration contractor to create a safe work place.

During the investigation

The packet that the representatives receive as they arrive on the scene includes a plan for how the investigation will be conducted. It includes steps for digging out debris, collecting artifacts and reconstructing the area of origin. The Blaze Fire investigator managing the scene goes over the plan and responds to any questions or requests from the participants, always mindful that the objective is an unbiased investigation. Shovels, ladders, lights, power equipment and any other tools that might be needed at the scene are ready. If part of a building needs to be removed, heavy machinery will be on hand. Warming equipment to thaw frozen debris and provide a workable air temperature is provided.

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