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Aftermarket and direct replacements for Ampgard & SC9000 medium voltage control systems
Eaton’s medium voltage motor control solutions include renewal and spare parts offerings for current Ampgard and SC9000 EP medium-voltage adjustable frequency drives, past generations ("Classic Ampgard” and SC9000) as well as legacy brands including Westinghouse and Cutler-Hammer. Our highly trained team of aftermarket engineering specialists are ready to assist complemented by a network of skilled field service engineers to provide installation and retrofit support.
Which motor control system do you have?
Medium voltage motor control units manufactured between 1962 and 2005 are now referred to as, “Classic Ampgard”.
Ampgard
A refresh was given to the over 40 year old Ampgard starter design in 2005 to further enhance performance and reliablity. This design is referred to as, "Ampgard." Key differences in appearance include the placement of the isolation switch and the location of the low voltage compartment door.
SC9000 and SC9000 EP
SC9000 EP has been production since 2013 and includes an encapsulated powerpole inverter. Prior to 2013 the SC9000 was available featuring a potted inverter design.
Identify your motor control system by manufacturing date
Classic Ampgard manufacturing dates
| Classic Ampgard |
Years in production |
| LF airbreak 25L2 200 A | 1962-1985 |
| LF airbreak 50L2 200 A | 1963-1981 |
| LF airbreak 50L4 400 A | 1965-1985 |
| LF airbreak 50L7 700 A | 1968-1988 |
| SJ vacuum SJ72V4 | 1982-2000 |
| SJ vacuum SJ72V8 | 1988-2010 |
| SL vacuum SL72V4 | 2000-2010 |
Ampgard and SC9000 manufacturing dates
| Ampgard |
Years in production |
| SL vacuum, 400A, 7.2 kV | 2005-present |
| SJ vacuum, 800A, 7.2 kV |
2005-2014 |
| SJ vacuum, 300A, 15 kV |
2010-present |
| SL vacuum, 800A, 7.2 kV |
2014-present |
| SC9000 MV drive | 2008-2013 |
| SC9000 EP MV drive | 2013-present |
For Additional support
Have your original General Order number (GO number) available when contacting an Eaton sales representative or authorized Eaton distributor. Your GO number will typically be a series of 2-4 letters, followed by between 6 and 8 numbers.
A history of reliability
For more than 5 decades, the Eaton Ampgard medium voltage motor control product has been on the market delivering top-notch performance and reliability for your motor applications. Additional ratings and features have been continuously introduced over the years. Our aftermarket and renewal parts offering includes support for legacy models of Ampgard including branding under Westinghouse, Cutler-Hammer and now Eaton, including support for Eaton SC9000 and SC9000 EP adjustable frequency drives.
Retrofits extend the life of your Ampgard equipment
In addition to traditional parts support, we also offer retrofits to bring the latest technology to classic Eaton Ampgard. Common upgrades include cell retrofits to convert a spare cell or mechanical future into a starter cell, MV4S soft starter retrofits as well as retrofits for LF air break contactors and SJ vacuum contactors.
Remote operator for enhanced arc flash safety
When mounted on the front of the starter, the Ampgard Remote Operator (ARO) for the starter isolation switch allows personnel to safely open and close the switch from outside the arc flash boundary. Classic Remote Operator (CRO) is avaible for Classic Ampgard starters.
How to buy from Eaton
