Molded Case Circuit Breaker Testing

At EMSCO, we offer a full range of services for testing and purchasing molded case circuit breakers. Our experienced team utilizes two state-of-the-art circuit breaker test sets—the Megger DDA-6000 Universal Circuit Breaker Test Set and the Phenix Model HC40C High Current Test Set—to thoroughly assess your circuit breakers. Whether you want to buy a breaker from us or simply require testing, we provide detailed test reports for all units.

We take pride in our efficiency and fast turnaround times. Most breakers can be tested and shipped on the same day, and we maintain a diverse inventory of breakers ranging from 15 to 5000 amps.

For circuit breaker testing or if you're in the market for a new one, EMSCO is your go-to destination. Reach out today to speak with one of our knowledgeable sales representatives about your testing needs.


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High Amperage Square D Bus Plugs

EMSCO got in a load of high amperage Square D Bus plugs. These bus plugs are a mixture of fusible and breaker plugs available in a wide variety of amperages, such as models PTQ46160GH and PTPA361000N. In addition to these bus plugs, we have a huge stock of Square D busway all the way up to 4000 amp.

Whether you need a single bus plug or a new busway run, EMSCO is here for all your bus plug and busway needs. Contact as salesman today with any questions.

Square D Model-6 Motor Control Centers

EMSCO has recently received a new shipment of Square D Model-6 Motor Control Centers. These Control Centers come with a variety of starter and breaker feeder buckets, and we are excited to announce that there are more than 20 Twin breaker feeder buckets available, each with a capacity of 100 amps. If you're interested in purchasing any of these high-quality motor control centers or have any questions, please don't hesitate to contact us today.

Square D Model-6 MCC Structure

EMSCO recently got in more Square D Model-6 MCC structure.

The structure has multiple Size-5 FVNR Starter Plug-On buckets as well as Size-4.

All with solid-state overloads and circuit breaker disconnects.

Whether you need a complete motor control center, an add-on section, or a single bucket we have you covered.

Contact a salesman today.

Square D Power-Zone NW 5000 Amp Main Tie Main Lineup

EMSCO recently got in a Square D Power-Zone NW 5000 amp main tie main lineup. The lineup includes (3) NW50H3 with Micrologic 6.0P trips, (2) NW32H3 with 5.0A Micrologic Trip, (1) NW32H3 with 6.0A Micrologic Trip. (1) NW20H3 with 6.0A Trip, (1) NW16H3 with 6.0A Micrologic Trip. We can customize this panel to meet your needs.

With this lineup, we also received (2) Square D Power Cast Transformer and Square D 15KV Medium Voltage Fusible Switches:

2500/3750VA 12470-480Y/277V Square D Power Cast II K-4
Two (2) 2500/3333KVA 12470-480Y/277V Square D Power Cast II K-4
Whether you need a single breaker or a complete substation lineup we have you covered. Give us a call today!

General Electric Spectra 480/277 Volt Main Breaker Panels with Spectra Breaker Distribution

EMSCO recently got in seven (7) GE Spectra 4000 amp 480/277 volt main breaker panels with Spectra breaker distribution. The main breakers are GE Power Break II SSD40G440 with Entelliguard Trip TU Trip Unit. All have multiple SKLL frame 1200 amp branch feeders breakers. Each feeder breaker fed a GE Spectra 1200 amp 480/277 Volt MLO panel that are also now part of EMSCO’s stock.

Call us today so we can customize these panels to fit your needs.

Westinghouse Medium Voltage Vacuum Contactors

Newly arrived, EMSCO has received a shipment of Westinghouse medium voltage vacuum contactors. These are open style contactors, 720 amp, and vacuum type OEM Model-A AC contactors; 720-amp, 3-phase, 7200 volts. Part number EMAN3NN8X1-M3.

If you are interested in these medium voltage vacuum contactors or any others, please give us a call today (1-800-328-1842) to speak with our sales department. We’ll be happy to provide quotes, additional information, or find any industrial electrical product or part that you may need.

Square D To Supply Massive New Google Data Centers — Leading To Long Lead Times For Customers

We’ve been hearing from some of our customers who have tried to place orders for new stock from Square D that they’ve encountered long lead times (several weeks to months) and have instead turned to EMSCO to quickly get the industrial electrical equipment they need. It turns out the long lead times from Square D are a result of being a supplier for a massive construction project from Google to build up to 11 new data centers, of which Square D has won the contract to provide the electrical infrastructure.

Aside from EMSCO’s massive inventory of industrial electrical equipment, we have the best lead time in the industry. If you are down and need to get up and running ASAP, we’re the place to call! With a major food producer down, EMSCO was able to ship a Square D NW40 main breaker lineup with multiple distribution sections and breakers same day to get them up and running again right away. Not only that, but we also completed a Square D Model-6 Motor Control Center lineup in 2 days after a company was down and couldn’t wait the long lead time for new. That MCC included starter, feeder and VFD buckets.

Whether it’s a single section of busway, a single breaker or bus plug, or a complete lineup, EMSCO has you covered to get you back up and running ASAP! We’re standing by 24 hours for all your after hours emergencies. Simply give us a call anytime (1-800-328-1842) and we’ll be ready to jump into action.

A Brief Introduction to Motor Control Centers

It's been a while since we discussed one of our main product categories in an overview post. In the past, we've covered topics like bus plugs to provide general information about the products EMSCO offers. In this post, we'll delve into the basics of Motor Control Centers (MCC).

Basics of Motor Control Centers (MCCs)

At its core, a Motor Control Center consists of a series of buckets housed within a larger structure. In industrial and manufacturing environments using electric motors, a system is necessary to control these motors, and that's where the motor control center plays a crucial role.

How They Operate

Feeder buckets are responsible for powering and controlling the electric motors, typically with one bucket per motor. Given that industrial processes often involve numerous electric motors, multiple buckets are required to manage the entire system. The structure serves as the vertical housing, conveniently holding and controlling all feeder buckets in a central location.

The buckets within the structure come in various sizes and configurations, such as fused or circuit breakers. Additionally, these buckets are fully removable, providing flexibility for the electric system to adapt to changes in industrial processes. For instance, adding or removing motors is simplified by adding or removing buckets from the structure or swapping them out for the appropriate components.

In Need of Parts?

If you're looking to replace, upgrade, or install a new MCC system, your search ends here. We offer a wide range of vertical sections of motor control centers, ranging from 400 amperes to 3000 amperes, with main or main lug compartments. Our extensive stock includes all major brands like Square D, GE, Allen Bradley, and more. With a plethora of buckets in stock, both fusible and breaker styles, in sizes 0-6, single and twin feeder buckets, EMSCO is certain to have the components you require.

About EMSCO

Established in 1948, Electric Motor Supply Company (EMSCO) is a leading dealer of used and refurbished industrial electrical systems and components. Our vast inventory, housed in our 250,000 square foot warehouse in Minneapolis, MN, ensures we have the exact part you need. From over 25 miles of bus duct, thousands of bus plugs, to various transformers, circuit breakers, and beyond, our experts are ready to assist with all your electrical requirements.


Picture of Allen Bradley 2100 Series FVNR Size-1 Starter Fusible Disconnect MCC Bucket R&G

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An Introduction to Bus Plugs

Bus plugs are a critical component of industrial power distribution systems. This blog post explores what bus plugs are, how they function, and the advantages they offer over traditional wiring methods. Learn how bus plugs can enhance flexibility, safety, and efficiency in your facility's power distribution.

WIRING BASICS

In most residential and commercial settings, power is distributed through hardwiring in the walls. In industrial settings, however, the large open floor plans make it difficult to distribute power in this way. That's where bus duct and bus plugs come in.

In industrial settings, bus duct is often used to distribute power to various areas of a facility. Bus duct [also known as busway] is essentially metal enclosures that contain conductors for distributing electricity and generally come in 10-foot sections that connect to one another to create the exact length necessary for a run. They can be installed overhead or under the floor, and they're designed to be flexible, so they can be easily repositioned or rearranged as needed.

However, just having bus duct isn't enough to distribute power to all the equipment in a facility. That's where bus plugs come in.

INTRODUCING THE BUS PLUG

Bus plugs are essentially large industrial electrical plugs that connect to a section of bus duct overhead and then feed electricity down to the equipment below.

Bus plugs typically come in a variety of sizes and styles to fit different types of bus duct and equipment. They're designed to be easy to install and remove, so they can be quickly repositioned or replaced if needed.

WHY BUS PLUGS?

One of the benefits of using bus plugs is that they allow for greater flexibility in terms of the layout of a facility. Because the bus duct and bus plugs can be easily repositioned, it's possible to change the layout of a facility without having to rewire the entire electrical system. This can save a lot of time and money in the long run.

Another benefit of using bus plugs is that they provide a higher level of safety compared to traditional hardwiring. With hardwiring, it's possible for a fault to occur in the wiring, which can lead to electrical fires or other hazards. With bus duct and bus plugs, the conductors are contained within metal enclosures and the bus plugs are equipped with either fuses or circuit breakers, which provide an extra layer of protection against faults and other issues.

Overall, bus plugs are an important component of industrial power distribution systems, allowing for greater flexibility and safety compared to traditional hardwiring.

We hope this has served to give a basic understanding of what exactly a bus plus is, how it works, and why it is used. If you’re looking for replacement bus plugs for your system, look no further! EMSCO stocks the largest selection of used and reconditioned bus plugs from all the major manufacturers (GE, Square D, and more) and from all vintages, from obsolete to modern systems. Simply browse our store or give us a call to find the model you need.

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Updated March 2024