Archive for the ‘General – Circuit Breakers’ Category

Circuit Breaker – POJ with perfect test results

May 30th, 2012 Comments off

Sometimes MIDWEST’s Engineering Technicians in our Switchgear Shop like to do what the Engineers call “Play.”  The technicians call it serious research.  Sometimes their adventures are quite worthwhile, even enlightening.  Recently an Engineering Technician dropped a circuit breaker test form on an Engineer’s desk and said, “Would you take a look at that and tell me if you think it’s okay.” The test results were excellent.  The contact resistance, insulation resistance, over current test results, reset tests, all the test results were excellent.  So why in the world was the Engineering Technician dropping it on the Engineer’s desk when the test results were so good?  The results looked like those for a new circuit breaker.  What they had done was test an old Westinghouse circuit breaker that had been practically crushed.  The case was broken and the arc chutes damaged.  It looked like it had been dropped from 50 feet and hit on one corner.  But, oddly enough, against all reason, it operated mechanically and the test results were all good.  But, of course, it failed the visual inspection.  When the Technician dragged the Engineer to the Switchgear Shop to evaluate the breaker, everyone had a good laugh.  This was good fun and the technical evaluation was unanimous, POJ, Piece of Junk.  One of our favorite highly technical terms.  In this case it was very obvious.  But frequently we find defects in used circuit breakers and in brand new circuit breakers, and other electrical equipment, that would never be revealed by testing alone.  That’s why the experience, training and knowledge of the Technicians and Engineers are extremely important.  There is no perfect test standard for every POJ.

General Electric Circuit Breakers

March 12th, 2010 Comments off

MIDWEST carries General Electric Circuit Breakers. Whether it’s a new, reconditioned, or used breaker, we are sure we can provide just the breaker you need. We stock thousands of General Electric circuit breakers in our inventory.


MIDWEST reconditions General Electric circuit breakers. Worn or damaged breaker component parts are tested and replaced if necessary as part of our quality control program. Over current devices can be retrofitted with electronic devices to assure state of the art over current protection. A low voltage air circuit breaker is disassembled. Insulating and current carrying members are cleaned and inspected and replaced if necessary. The breaker is reassembled and then put through a rigorous testing procedure to make sure everything properly checks out. The breaker would be tested for contact resistance, insulation resistance, and the over current devices would be tested to ensure they operate in accordance with the manufacturer’s trip curve specifications. Typical basic overcurrent functions would be long time, short time, and instantaneous pick up and trip capabilities. Some breakers contain ground fault capability as well.


Click Here for General Electric Circuit Beakers


Our staff is always excited to take your phone call and answer any General Electric Circuit Breaker questions you may have. We are proud to have served the electrical community since 1977, also the year the first Star Wars movie was released, (no connection between those events). Whatever your circuit breaker needs may be, we are sure we are your best solution. Our engineers have many years of experience with circuit breakers and power distribution equipment and they are always happy to answer any question you may have.


March 5th, 2010 Comments off

Breakers, an integral component to any electrical circuit, come in many types and sizes. Two common categories are the air circuit breakers, and molded case circuit breakers. Air circuit breakers are comprised of a metal frame which serves as the breaker structure. Attached to the metal frame are the various breaker current carrying and insulation components.


Molded case circuit breakers are comprised of a dielectric compound which acts as an insulation member for the current carrying components of the breaker. The dielectric compound also acts as the frame support for the breaker.


Air breakers are typically larger breakers capable of carrying more current. One advantage of molded case breakers is their lower purchase price. The breakers you find in a home electrical panel are small molded case breakers. Molded case circuit breakers can also be larger current carrying types as well. Today’s molded case breakers can go all the way up to 4000 frame amps.


To check on the lowest prices available for breakers, give us a call. Call us old fashioned, but we still have live people answering the phone. Our office hours are from 7:00am to 6:30pm CST. We are very happy to help you make you breaker problem go away.


Our engineering and technical team at MIDWEST gets very excited about breakers.  Since 1977 Midwest has been involved in breaker service, maintenance, and testing. We have built a solid reputation for friendly and knowledgeable service.  If you are in need of breaker information, or are looking for a new, surplus, used, or a reconditioned breaker, MIDWEST is the place to call.

Cutler Hammer Circuit Breaker

March 3rd, 2010 Comments off

Cutler Hammer, a venerable name in breakers, bought out the Westinghouse distribution and controls business unit in 1994. This acquisition included the Westinghouse circuit breaker division. MIDWEST carries many types of Cutler Hammer/Westinghouse breakers. A popular Cutler Hammer breaker is the KDC3250 thermal magnetic breaker. Thermal magnetic refers to the type of over current device of the breaker. The thermal element (heat) is responsible for opening the breaker under an over current (long time) condition. The magnetic part is responsible for opening the breaker in a short circuit (instantaneous) condition.

Our engineering and technical sales staff at MIDWEST gets really excited when the phone rings in anticipation of a breaker question. Our expert staff has many years of experience. They are very happy to help you solve your breaker problem.

For the complete line of Cutler Hammer circuit breakers, give us a call or visit our web site at We have a huge inventory of used breakers in stock and ready to go. While you have our representative on the line, ask about our other electrical products we handle.

MIDWEST has been in the beakers service, sales, and testing business since 1977, the same year the Yankees won the World Series pennant for the 21st time. There is no connection between the two events that we are aware of.

MIDWEST maintains a huge inventory of breakers in stock. Whether you are looking for a new, used, or reconditioned breaker, we would be happy to help you find it.

Our office is open from 7:00am to 6:30pm CST.

Buy Circuit Breaker

March 1st, 2010 Comments off

If you have a circuit breaker for sale, MIDWEST is interested in buying it. We are the circuit breaker people. Since 1977 we have been in the business of testing and maintaining circuit breakers. From large medium voltage breakers, to air breakers, to molded case circuit breakers, we have an interest in looking at any circuit breaker you may have for sale.


We pay cash for your circuit breaker. Whether you have one single circuit breaker or many breakers for sale, we are the place to call for your best price and service. When you think Buy Circuit Breaker, think MIDWEST.


If necessary MIDWEST can safely remove your circuit breaker or other electrical equipment you may have from service, saving you the expense of hiring additional electrical workers. Our expert field technicians have many years of experience in the electrical equipment field. They will be able to determine for you on the spot, the specific value of each piece of your electrical equipment. Please remember MIDWEST when you search the web for Buy Circuit Breaker.


Here at MIDWEST, when we hear the words buy circuit breaker we get really excited. Whether you are interesting in buying a circuit breaker or selling a circuit breaker MIDWEST is your best source.


Click Here for Buy Circuit Breaker


While you have our representative on the phone ask him about our other electrical products we buy. We carry a complete line of power distribution equipment. Just give us a call and speak to a live person. Yes, we still answer the phone with a live body. Our office is open from 7:00am to 6:30pm CDT. Our engineers and technical sales team are looking forward to speaking with you. Give us a call.

Categories: General - Circuit Breakers Tags:

Circuit Breakers

February 24th, 2010 Comments off

Sometime in January of 1942, the American intelligence community broke the Japanese code enabling the United States to track what the Japanese were up to. Circuit breakers contain their own type of code also. It may not be as intriguing or as sophisticated as all that, but the circuit breaker code tells its own story. Enter the circuit breakers catalog number. This number is the ID bracelet of the circuit breaker. Take the catalog number of a Square D KAL36200. We know it’s a Square D. The “KA” represents the series of the breaker. The “L” means the breaker has lugs. The “3” indicates the number of poles. The “6” the voltage class (in this case it’s 600 volts). The “200” indicates the frame amperes. So there you have it. The anatomy of a breaker contained in one simple number.


So when you call up with questions about circuit breakers, the catalog number is the key number to know.


Since 1977 MIDWEST has been in the business of servicing circuit breakers, which coincidentally was the only year in recorded history snow fell in Miami Florida. The two events are not related. We have seen many types and sizes of circuit breakers come across our shop tables over the years, ranging from medium voltage breakers, to low voltage air breakers, to molded case circuit breakers. Our experience has taught us well. Let our expert engineers and technical team help you with your circuit breaker concerns. Our office hours are from 7:00 AM to 6:30 PM CDT. Our technical support team is standing by and ready to assist you.

General Electric Circuit Breaker

February 22nd, 2010 Comments off

General Electric Circuit Breakers offers many high quality molded case breakers for your power distribution needs. MIDWEST is your single best source for referencing a General Electric Circuit Breaker. Whether new, used, new surplus, or reconditioned we carry a huge inventory of General Electric Circuit Breakers in our warehouse. Our engineering and technical team gets really excited when the phone rings with a question about a General Electric Circuit Breaker.


Here at MIDWEST, we have been testing and maintaining breakers since 1977. You might say, we know breakers like a mother knows her baby. Along with General Electric Circuit Breaker, we offer many types and sizes of breakers in stock and ready to ship. Whatever breaker problem you may have, we are sure to solve it for you. Our complete line of breakers is online at


One quick word about our service: As part of our quality control program, all our breakers are put through a rigorous testing procedure before they are shipped to our customers. This assures our customers the high level of service they have come to know from MIDWEST.


While you have one of our people on the phone ask him about our other electrical products we carry. We handle a complete line of power distribution equipment. Just give us a call and speak to us soon. We still answer the phone with a live body. Our office is open from 7:00am to 6:30pm CDT. Our technical team looks forward to speaking with you.