The SP-140572 kit is a transistor kit with snubbers that has been designed and manufactured by Allen-Bradley/Rockwell Automation as one of the spare parts for the 1336VT series of adjustable frequency AC drives. The 1336VT series is related to the larger 1336 series, which is one of the most commonly used series in industrial applications that require adjustable frequency AC drives. These drives are applied as control devices for motors that operate at a variable speed. The drive controls the speed, acceleration, and deceleration of the motor through a frequency variation. The Allen-Bradley/Rockwell Automation SP-140572 transistor kit with snubbers is especially compatible with equipment that includes the digits “B075” in the part number and that has a current output of 120 Amps and a voltage range of 380 to 460 Volts AC. The Allen-Bradley/ kit must not be used with drives that do not match those specifications since this could cause damages and flawed operations.

 

The Allen-Bradley/Rockwell Automation SP-140572 transistor and snubber kit is located inside the drive when it is installed, and the installation involves opening up the drive and installing the transistor kit with snubbers in the correct position where it will be correctly attached to the rest of the components of the drive. Before installing the Allen-Bradley/Rockwell Automation SP-140572 transistor and snubber kit, the power must be removed from the drive and the enclosure door needs to be open. The DC brake and the R-L1, S-L2, and T-L3 terminals need to be at zero volts before attempting to disconnect any wiring in the drive. There must also be no voltage on different terminals in the main control board, communications adapter board, standard adapter board, and in the control interface L-option board. The 1336VT Drives require 6 of these kits each for operation.