6 hardware description – Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE User Manual
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HARDWARE DESCRIPTION
1557-UM050F-EN-P – June 2013
Voltage Feedback Circuit Boards
Voltage feedback boards are located in the converter cabinet on the far left side mounted on a vertical
glass polyester channel. The boards consist of series connected resistors for sensing input voltage, DC
link voltage, and output voltage.
Cooling Fans
There are several different arrangements of cooling fans. Fans are required to remove heat from the drive
to ensure proper operation of its components. The fans draw air into the drive through the vented lower
doors and exhaust it through vented enclosures at the top of the drive.
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