ENS Event | |
|---|---|
04:00 Jul 22, 2011 | |
| Title | Part 21 Regarding Kf Protective Relay - Defective Capacitor |
| Event Description | {{#Wiki_filter:The following information was received via fax and email:
Subject: 10 C.F.R. Part 21 Notification of Deviation regarding KF Protective Relay - Defective Capacitor On June 2, 2011, Constellation Energy reported that two relays caused unnecessary breaker trips three weeks after the relays were placed in service. Their investigation found that the Under-frequency Trip setpoint had drifted from the pre-set value of 57.77 Hz to 60.316 and 61.2 Hz. Our investigation determined that both relays contained a defective capacitor (ABB Part Number #606B340H07). The capacitor should have measured 0.225 �f (micro-farads) ? 3%. Actual measured value of the capacitors was 0.195 �f and 0.208 �f. A failure analysis conducted by Arizona Capacitor Corporation identified the capacitors were incorrectly constructed with metalized film, instead of oil impregnated paper/film/oil, as required by ABB design specifications. These capacitors were manufactured by Aldon Corporation, with a date code of April 4, 2008. Per 10 C.F.R. 21.21 (b), we do not have the capability to perform the evaluation to determine if a defect exists, and will notify the purchasers or affected licensees within five working days. Currently, we believe there are a total of six suspect relays, provided to three customers. The three customers are: WESCO located in Murrysville, PA, KF Relay Style 1328D72A02A, S/N 12027, 12028A, Qty 2, ABB Inc located in Florence, SC, KF Relay Style 1328D72A02A, S/N 12253, Qty 1 and, ABB Ltd located in Cheonan, South Korea, KF Relay Style 1328D72A01, S/N 12025, 12026, 12366, Qty 3. }} |
| Where | |
|---|---|
| Abb, Inc. Coral Springs, Florida (NRC Region 1) | |
| Organization: | Abb, Inc. |
| Reporting | |
| 10 CFR 21.21 | |
| Time - Person (Reporting Time:+9.92 h0.413 days <br />0.059 weeks <br />0.0136 months <br />) | |
| Opened: | Dennis Batovsky 13:55 Jul 22, 2011 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Jul 22, 2011 |
| 47089 - NRC Website | |
Abb, Inc. with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation | |
WEEKMONTHYEARENS 470892011-07-22T04:00:00022 July 2011 04:00:00
[Table view]10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation Part 21 Regarding Kf Protective Relay - Defective Capacitor 2011-07-22T04:00:00 | |