Part 21 Report - 1997-690

ACCESSION #: 9709090321 ABB September 4, 1997 Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555 Subject: Report of Potential Deviation per 10CFR Part 21 Possible Crack Contact Block on CVQ Class 1E Relays Notification By: ABB Power T&D Company Inc. Power Automation and Protection Division 4300 Coral Ridge Dr. Coral Springs, FL 33065 This letter is a notification of a potential defect on the Class 1E type CVQ relay, style numbers 1339D96A01 and 1339D96A02. This defect consists of a potential cracked contact block on the polar element assembly. The crack may cause a short between the contact and the frame of the polar element. The crack may be caused by the excessive length of the screw that retains the contact block to the polar element frame. The solution to the problem is to add a flat washer to the assembly in order to relieve any possible stress. A copy of this notification is being sent to all customers who our records indicate have purchased this type of relay. Questions concerning this notification letter should be directed to the Quality Manager at the Power Automation & Protection Division at 954-752-6700 or Fax 954-345-5329. Marilinda Ruiz Jose Gierbolini Quality Manager Site Manager 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 *** END OF DOCUMENT ***

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