NPE...Your "Electrical 911"

Hurricanes, floods, lightning strikes or just a simple tree falling on a transmission line can trigger a catastrophe that shuts down power. Without power, there is no production and the cost of down time can cost tens of thousands of dollars – per hour.

Electricity drives production in the modern world, and often times production is run on switchgear and circuit breakers that have been out of production for years, if not decades. If you call the original manufacturer and they tell you they no longer support your product line, their only option willbe to replace your equipment with whatever they are currently producing. This will often entail reconfiguring your distribution system, paying big bills and waiting months for “the latest and greatest” product line only to find out that it’s less reliable than what you previously had and within a short amount of time will be obsolete as well.

So, when disaster strikes and you’re faced with these obstacles, what do you do, who do you call to restore production in the fastest and most economical way? That’s what National Power Equipment is here for. As a stocking distributor of used, remanufactured circuit breakers and switchgear, partsand our ever-growing list of aftermarket parts, NPE can supply you with the right equipment, at the right price and most importantly, right now! Our warehouses are stocked with low voltage (600 VAC or less) through medium voltage (15,000 volts or less) air and vacuum circuit breakers, switchgear,medium voltage motor starters,load break switches, and all of the parts needed to go with it. Our inventory not only contains equipment that dates from the World War II era to current, but our staff has the experience, knowledge and expertise to get you up and running in hours, days or weeks instead of months. Think of us as your “ELECTRICAL 911”. When disaster strikes, large or small, we can assess the problem, offer a variety of solutions and start implementing them right away.

For example, consider the case of a once in a 100 years flood that incapacitated a technical center for a major automotive company. While the water was still receding NPE was on site consulting with the contractor, assessing the damage and formulating plans. Parts and equipment began arriving the next day. NPE supplied medium voltage fuses and switch parts, low and medium voltage circuit breakers, relays and tons of parts, literally anything that was needed to get over twenty load centers back on line.  The first of the substations came on in a week and within eight weeks 99% of production was restored.  Overall, NPE made seventy-nine separate shipments including one of sixty-seven circuit breakers that werereconditioned and ready to go.

Unexpected outages, large or small, require two things to overcome them – experience and options. Call us we have both.

Replacement Labels for Your Rebuilds

Are you rebuilding your equipment? Let NPE supply you with new replacement labels to bring them back to “like new” condition. NPE replaces worn labels with new labels when doing our Class One” reconditioning procedure.

We have a database full of common labels that are available with same day shipping. If we do not have the particular label you need, no problem, in most cases we can design your label from scratch. Just provide us with a picture and dimensions.

It is important to communicate with safety labels the electrical hazards like voltage and shock hazards. We have some of these common warning/danger labels and we can also customize these labels for your specific needs.

We offer our labels on both silver and white adhesive paper which are then laminated for extra durability. No minimum quantity required. Contact us online, give us a call or send us an email for a quote!

 KLine

 

 

 

How to Identify Raise Lower Mechanisms for Circuit Breakers and What You Need to Maintain Them

General Electric produced a very popular line of medium voltage (2.3kv-15kv class) circuit breakers over a 30-year timespan with literally tens of thousands of units in service across the U.S., Canada, and other areas. This product line, known as the Magne-Blast or AM breaker, has been upgraded over the years with improvements and life extensions to add even more value to the customer.

One of the maintenance items that needs to be addressed periodically is what the industry calls the “Raise Lower Mechanism.” This is a mechanism that lifts the breaker from ground level and assures proper alignment and connection to the primary disconnects on both the line and load side.

Maintaining Raise Lower Mechanisms for Your Circuit Breakers

There are several versions of this mechanism that need to be identified properly when service is needed. First, we will address the two most common mechanisms, the “Cast” and “Fabricated” or “Fab’d” mechanisms. GE classifies these mechanisms into two groups depending on the width of the switchgear cabinets they are in because they also include the shutter and connecting chain. GE identifies the Cast Mechanisms as either M26H or M36H because the cabinets they go in are either 26” or 36” wide. The fabricated design is simply designated as M26 and M36.

There is a well-known table in a GE publication that details the supposed application of these devices with particular breaker models and frame sizes. However, we have found both discrepancies in actual field applications as well as contradictions within the table itself. See the Illustration 1 Cast vs Fab mechs pdf for reference.

The easiest way to identify which mechanism you may have (they are not interchangeable), is by looking at the housing at the top of the mechanism that contains the gears. The cast style is obviously heavier duty, thicker, and has pit marks from the sand that was used to sand cast the original parts. The fabricated style is built with plate steel that is lighter duty and welded together.
See Illustrations 2 and 3 for reference.

Image of a cast raise lowe mechanism for a GE Magne-Blast circuit breaker.Image of a fabricated raise lowe mechanism for a GE Magne-Blast circuit breaker.

NPE regularly stocks both of these mechanisms. They are completely rebuilt and ready to install for those “unscheduled outages” and we can even take your damaged or worn out mechanism in for a core rebate. For customers that want to rebuild the mechanisms themselves, we offer both cast bushing kits and fabricated bushing kits and years of experience and expertise to help you along the way.

Raise Lower Mechanism Exceptions

While these mechanisms comprise 90% of what is found in the market, there are some exceptions that should be noted.
The first mechanism is designated in the first illustration with the “HH” suffix. These mechanisms will be found in the largest of the Magne-Blast product line, particularly in the 1000 MVA breakers. See 7A in Illustration 1 for reference. They are the heaviest duty mechanisms and have two vertical screws to lift these frames into place.

On the opposite end of the spectrum, the smallest Magne-Blasts made are the 50 and 75 MVA class and are built for 18”-wide switchgear. These cells utilize a single lifting screw mechanism mounted on only the right side of the cell.

The last group of mechanisms are the oldest versions made for the AM 5 and AM 15 versions of the Magne-Blast line that utilize a double secondary coupler. While not many of these breakers are left in service, there are designs for updated/retrofitted breakers that still use the old switchgear. This last set will have the double vertical screw on both sides, similar to the “HH” version, except that these are much lighter duty. When replacing these, you will need to know if the motor that operates the lift is mounted in the front of the cell or all the way in the rear.

Raise Lower Mechanism Aftermarket Parts to Help Keep Switchgear Going

In addition to Raise Lower Mechanisms, NPE manufactures and stocks many of the common parts that you will need to keep your switchgear running. Raise lower motors, motor clutch parts, and bearing kits are all the things you will need to properly operate and maintain your equipment. You can find these parts in our Aftermarket Parts Store on our website.

AM 4.16 -350 3000 Amp Shutter (Cell)
AM Motor Coupler
AM Raise Lower Mech Bearing and Bushings Kit (Cast)
AM Raise Lower Mech Bearing and Bushings Kit (Fabricated)
AM Raise Lower Motor (120 AC/125 DC), with Switch
AM Raise Lower Motor (120 AC/125 DC), without Switch
AM Raise Lower Motor (220 AC/250 DC), without Switch
AM Raise Lower Motor (220 AC/250 DC), with Switch
AM Raise Lower Motor Base Plate

This may seem complicated, but at NPE we face these questions every day. Our knowledgeable staff has the expertise to walk you through the various steps to identify what you have. Contact us online, give us a call, or send us an email with pictures of the nameplate if available and we will help you get the right parts, at the right price, right now!

Extend the Life and Reliability of Your GE Magne-Blast Switchgear with NPE’s Bottle Repotting Program

General Electric produced tens of thousands of Magne-Blast breakers in various sizes.

While most maintenance programs focus on rebuilding the original air breakers or retrofitting them to a more modern vacuum technology, there are other components to the system that need to be addressed to maintain safety and reliability.

Why Magne-Blast Bottles Need to be Repotted

The main component that needs to be addressed is the “bottle,” the critical link between the draw outcircuit breaker and its connection to the line and load side buss. The bottle consists of a porcelain cylinder mounted in a cast aluminum plate that is aligned and attached to the switchgear cabinet. Within that bottle is a silver-plated copper “tulip” that the line and load side conductors mate with for a solid reliable connection.

 

That connection is mounted in a filler material and supported by potting material that was originally designed to fill the upper void in the bottle and hold it in place for proper alignment. However, that material, commonly described as a tar pitch like filler, dries out and cracks over time. This allows moisture, dirt, and other contaminants into the bottle that cause that old reliable mating connection to loosen and eventually fail.

Those failures can be catastrophic, causing untimely loss of production and collateral damage, and can occur regardless of the care and maintenance of the breaker and the rest of the system. The question then is, “How do I maintain the reliability of this system”? Should I spend the capital for upgrades and replace the whole system?”

The answer is simple: Call NPE. We have the material and experience to eliminate this issue and help you extend the life of your Magne-Blast switchgear through our special repotting process.

NPE’s 8 Step Procedure: 

  1.      Examine the bottles in a fixture and conduct a wipe test to assure that they are candidates for rebuild.

 

  1.      Remove the outdated “tar pitch” potting right down to the filler. 

  1.      Re-align the connecting tulip and lock it in place so it doesn’t move and cause future failures.

 

  1.      Secure the joint between the copper and seal.

 

  1.      Insulate the buss with modern shrink tube insulation.

 

  1.      Replace the old potting material with a new two-part system that is thermally stable which will last far into the future.

 

  1.      Clean and silver plate all mating surfaces to increase conductivity at critical joints.

 

  1.      Re-test alignment and conductivity to assure a quality trouble-free replacement in the field. 

Sound simple? The devil is in the details, and NPE focuses on details. This whole procedure may sound easy, but there is typically little opportunity to schedule downtime to shut down production while these critical components are sent out for work. That process can typically take one or two weeks.

NPE stocks replacement bottles that can be matched to your system and swapped out in hours rather than weeks. Once we’ve provided identical replacements, we can evaluate the bottles that were taken out and either provide a credit for the “core” or we can recondition/repot them for replacement in other cells or to have on the shelf for spares for other GE circuit breakers.

Contact us online or give us a call at 216-898-2680 to discuss our Magne-Blast bottle repotting program today.

Reduce Failure Rates and Avoid Downtime with NPE’s Circuit Breaker Aftermarket Parts

It is well known in the industry that National Power Equipment has thousands of available reconditioned parts, assemblies and subassemblies. NPE has now taken the business of supplying parts to a new level by introducing a product line of aftermarket parts for industrial circuit breakers and switchgear.

Extend the Life of Your Equipment with Replacement Aftermarket Parts

NPE’s aftermarket parts are available with improved designs and modern materials to help reduce failure rates and avoid downtime. Our experienced staff continuously works to identify solutions for hard-to-find and high-failure parts.

We use modern materials with an emphasis on strength and quality. Sometimes the changes can be as simple as a fiber-reinforced material or by filling voids to increase the strength of the part. Other times it could be a change in the concept of how the part performs. Why would you want to replace one poorly-designed part with another? NPE’s line of parts are made to fix the problem, not just put a band-aid on it.

  

 

In addition to our long and growing list of replacement parts for circuit breakers, we also stock an extensive and growing list of hardware and tools to help you safely move, lift, and maintain your circuit breakers and switchgear. Racking handles, extension rails, slow close, and spring removal tools are only a small sample of what we offer.

 

Most often we find that our customers appreciate the prompt availability of our parts and our same day or next day shipping. All of our parts, especially the ones that have been out of manufacturing production for decades are in stock and ready to ship for delivery in hours or days, while OEM’s take weeks to ship even if they are in stock. Our products are available through your normal purchasing channels and in our online Aftermarket Parts Store

The Right Circuit Breaker Replacement Parts

As difficult as it is to correctly specify replacement circuit breakers, finding replacement parts can be much more challenging. Not only do you need to communicate all the correct breaker information, you also need all the information regarding the vintage changes of the internal parts as well. 

We specialize in fast, easy solutions for finding these parts. With a few questions and possibly a photo or two, our sales team will get you the right part at the right price and, if needed, right now!

Please take a moment to browse our available aftermarket parts store. If you don’t see what you need just let us know. If we don’t have an improved design or a used part, we would be happy to quote a new custom design just for you. In any case, you can be assured that we will do our best to find the best solution to solve your problem and get the power back on as fast as possible.

Contact us today to talk to one of our experts about aftermarket parts.