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 1949, 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

Shop MCC Buckets and Structure

When You Can't Wait for New Electrical Equipment

Manufacturer lead times don't always line up with the realities of a plant shutdown, equipment failure or project deadline.

When waiting weeks or months for new electrical equipment isn't an option, used, surplus and professionally reconditioned equipment can provide another path forward — especially when the required equipment is already in stock.

That's where EMSCO's inventory makes a difference. We stock a wide range of legacy and current industrial electrical equipment, and we recondition equipment in-house so we can respond quickly when customers need a replacement.

A Square D NW40 Lineup Shipped the Same Day

A food producer needed a Square D NW40 main-breaker lineup and couldn't afford to wait through the normal lead time for new equipment.

EMSCO had the equipment available. We supplied a main-breaker lineup with distribution sections and breakers and shipped the equipment the same day.

The customer didn't have to wait for a new lineup to be manufactured because the equipment they needed was already here.

A Square D Model 6 MCC Lineup Completed in Two Days

In another case, a customer needed a Square D Model 6 motor control center on a much shorter timeline than new equipment could provide.

EMSCO was able to configure the required MCC lineup using equipment from our inventory. The lineup included starter, feeder and VFD buckets and was completed in two days.

For the customer, the important part wasn't whether the equipment came from a factory production schedule. It was getting the right equipment, properly configured, on the timeline the job required.

Why In-Stock Electrical Equipment Matters

Electrical equipment doesn't always fail on a convenient schedule. Projects change. Existing equipment becomes obsolete. A replacement may no longer be available new, or the manufacturer lead time may simply be too long.

EMSCO has spent decades building an inventory specifically for situations like these. Our warehouse includes equipment from manufacturers such as Square D, Eaton/Cutler-Hammer, Westinghouse, GE, Siemens/ITE, Allen-Bradley and others.

Depending on the application, we may be able to help with:

  • Circuit breakers
  • Bus plugs and bus duct
  • Motor control centers and MCC buckets
  • Low-voltage switchgear
  • Transformers
  • Switches and other power distribution equipment

Much of that equipment is used, surplus, obsolete, hard-to-find or professionally reconditioned in-house.

Don't Assume a Long Factory Lead Time Is Your Only Option

If a manufacturer quotes a lead time that doesn't work for your project, or the equipment you need is no longer manufactured, it's worth checking existing inventory before redesigning the system around something new.

Start with the manufacturer, catalog or part number, voltage and amperage. For older or difficult-to-identify equipment, photos of the nameplate and existing equipment can help us identify what you have.

Not everything in EMSCO's inventory is listed online, so don't assume we don't have it just because you can't find an exact match on the website.

Need Electrical Equipment Fast?

Whether you're replacing a failed breaker, adding to an existing busway system, sourcing an obsolete MCC bucket or trying to avoid a long lead time on an entire lineup, talk directly with EMSCO.

Tell us what you need and when you need it. We'll check our inventory and help determine what options are available.

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