Motor Controls: Product Families
A motor control center, or MCC, is a lineup of enclosed vertical sections that share a common bus and hold the starters, drives and protective devices for many motors in one place. Each plug-in or withdrawable unit serves one motor or load, and the horizontal bus feeds every section.
Ratings that identify a lineup include voltage, horizontal and vertical bus current, and the short-circuit bracing of the bus. Arc-resistant construction is offered by several manufacturers. Because units, bus and stabs are specific to a product line, buyers of surplus units or replacement buckets typically ask by the MCC series and bus rating. The families below carry the figures the manufacturers publish.
6 product families from 5 manufacturers
Product families
Rockwell Automation (Allen-Bradley)
CENTERLINE 2100
Listed as current
Low-voltage MCC with plug-in units for starters, VFDs and smart motor controllers; IntelliCENTER software and ArcShield arc-resistant option.
- Rated range
- 208-600 V; horizontal bus 600-3200 A; bus bracing 42/65/100 kA; ArcShield up to 3000 A at 480 V and 2500 A at 600 V; UL 845 and NEMA
Schneider Electric (Square D)
Model 6
Listed as current
Standard and industrial low-voltage MCC built to NEMA, ANSI and UL 845.
- Rated range
- Ratings not stated
Schneider Electric (Square D)
Model 6 AR
Listed as current
Arc-resistant variant of Model 6 that contains and redirects arc energy.
- Rated range
- Ratings not stated
Siemens
tiastar standard MCC
Listed as current
Modular UL/NEMA low-voltage MCC accepting 22-30 mm pilot devices, direct starters and SINAMICS G120 drives.
- Rated range
- Ratings not stated
ABB
MNS-MCC
Listed as current
Low-voltage MCC with withdrawable and plug-in units in a NEMA 1A enclosure, with arc-resistant versions.
- Rated range
- 208/240/480/600 V; horizontal bus 800-4000 A; vertical bus 800 or 1600 A; SCCR 42/65/100 kA at 480 V and 25/42/65 kA at 600 V; UL 845
ABB (GE legacy)
Spectra Series / 8000-Line
Legacy
Legacy GE low-voltage MCC; ABB has serviced and supported it since acquiring GE Industrial Solutions in 2018. Vertical bus 300, 450 or 600 A; unit stabs 225 A maximum.
- Rated range
- Vertical bus 300/450/600 A (voltage not stated)
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Ratings and lifecycle notes come from the manufacturer pages linked on each entry.
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