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                                                                    EXHIBIT 21.1




                     SUBSIDIARIES OF POWELL INDUSTRIES, INC.





NAME OF DOMESTIC SUBSIDIARY                            STATE OF INCORPORATION
- ---------------------------                            ----------------------

                                                    
Delta-Unibus Corp.                                     Illinois
Powell Electrical Manufacturing Co.                    Delaware
     Powell Power Electronics Company, Inc.            Delaware
Powell-Process Systems, Inc. (Inactive)                Utah
Powell-ESCO Company                                    Texas
Unibus, Inc.                                           Ohio
Powell Energy Systems Inc. (Inactive)                  Nevada
Transdyn Controls, Inc.                                California






NAME OF FOREIGN SUBSIDIARY                             COUNTRY OF INCORPORATION
- --------------------------                             ------------------------

                                                    
Powell Foreign Sales Corporation                       Barbados, West Indies