United States Nuclear Regulatory Commission - Protecting People and the Environment


ACCESSION #: 9704300011



April 22, 1997                     ABB



Document Control Desk

U.S. Nuclear Regulatory Commission

Washington, DC 20555



Subject:  Our letter of March 28, 1997

          Report of Potential Deviation per 10CFR Part 21

          ZPA Ratings for Class 1E Relays



Notification by:    ABB Power T&D Company Inc.

                    Power Automation and Protection Division

                    4300 Coral Ridge Drive

                    Coral Springs, FL 33065



This letter is to inform you of typographical errors found in the March

28, 1997 letter with reference to revised ZPA ratings.



The above mentioned letter was issued as a result of further analysis and

evaluation of our available qualification documents, concluding that most

of our Class 1E relays had the correct ZPA rating as originally

calculated.



The corrections are as follows:



1)   The column heading labeled "Previous ZPA Rating (g) Letter 9/17/97"

     should have the year 96, not 97.



2)   For the relay type SDF-1, the "Correct ZPA Rating (g)" should be

     4.2, not 8.0.



     This letter is being sent to those customers that have purchased

     SDF-1 type relays.



We apologize for any inconvenience this may have caused.



Questions regarding information in this letter should be directed to the

Quality Manager at the ABB Power Automation and Protection Division at

800-523-2620, (954) 752-6700, or fax (954) 345-5329.



Marilinda Ruiz                     Jose R. Gierbolini

Total Quality Manager              Profit Center Manager

                                   Electromechanical Relays



                       ABB Power T&D Company Inc.



Power Automation & Protection Division       4300 Coral Ridge Drive

                                             Coral Springs, FL 33065



                                             Telephone: (954) 752-6700

                                             Telefax:   (954) 345-5329



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