Notified: R1DO(Young), R2DO(Miller) and Part 21/50.55 ReactorsĪGREEMENT STATE REPORT - POSSIBLE MISADMINISTRATION Additionally, the hold down screws for the terminal lugs should be checked for tightness during breaker replacement activities. Paragon recommends purchasers and licensees perform inspections of affected motor control center cubicles containing the JD/HJD series MCCBs and any spares contained in plant inventory. For breakers installed prior to 2017, it is likely that routine surveillance or preventive maintenance activities on the motor control centers containing this series of MCCBs would have identified overheating conditions or nuisance tripping. These reported failures are the first reported to Paragon. To mitigate potential for recurrence regardless of what Eaton determines as the cause, Paragon Electrical Engineering group will conduct training on this issue and will revise commercial grade dedication plans (CGDs) for J Frame MCCBs containing these lugs to include a torque check. Results indicated that the lug remains tight to the required torque value during removal and installation. Paragon completed testing to determine if the TA250KB terminal lug can be inadvertently loosened during normal breaker installation/replacement into its associated motor control center cubicle. Paragon will also conduct torque checks of all breaker lugs installed on J Frame molded case circuit breakers (MCCBs) currently in inventory. Paragon has taken action to identify and quarantine in-process work on these breakers until appropriate inspections can are performed and is also working with the breaker manufacturer (Eaton) to help in determination of cause and formal corrective action to prevent any recurrence. The results of Paragon Engineering and Quality Assurance departments' final corrective action plan regarding the Eaton JD/HJD series circuit breakers OEM terminal lug (part number TA250KB) collaboration are as follows: * * * UPDATE ON OCTOAT 1737 EDT FROM RICHARD KNOTT TO KAREN COTTON * * * Paragon Engineering and Quality Assurance departments are collaborating, and final corrective action should be completed by. Paragon is also developing tests to determine if the TA250KB terminal lug can be inadvertently loosened during normal breaker installation/replacement into its associated motor control center cubicle. Paragon is working with the breaker manufacturer to help in determination of cause and formal corrective action to prevent recurrence. Paragon has taken action to identify and quarantine in-process work on these breakers until appropriate inspections can be performed and entered this issue into their non-conformance/corrective action process. In both cases, troubleshooting identified an OEM terminal lug (part number TA250KB) installed on the breaker line side connection point was loose creating a high resistance connection leading to breaker damage and interruption of power to the connected load. On, Paragon was informed of two recent failures of Eaton JD/HJD series circuit breakers. The following is a synopsis of information from Paragon Energy Solutions, LLC received via email. Notified RDO2 (Miller) and Part 21/50.55 ReactorsĮN Revision Text: PART 21 - CIRCUIT BREAKER POTENTIAL DEFECTS "As the noted failure could not be reproduced by Curtiss-Wright or TYCO, there is no evidence of part malfunction and thus no further evaluation or notification applies." In all tested conditions, the relay performed within manufacturer specifications, and with no contact binding. TYCO tested the relay with and without the LL auxiliary switch option and could not duplicate the failure. "The relay was subsequently returned to TYCO for their evaluation. The following information was provided by Curtiss Wright via email: * * * UPDATE ON OCTOAT 1146 EDT FROM JENNIFER HARRISON TO KAREN COTTON * * * CW anticipates an update to the notification with final results by October 15th. Once the evaluation is complete, the current report will be updated. As the relay is questionable for reliable service, CW is having the relay returned to Tyco for their evaluation. The relay was returned to CW for evaluation however, CW could not duplicate the failure. Duke Energy had identified certain contacts that were found sticking in the open position. On June 20, 2023, Duke Energy sent a letter to Curtiss Wright (CW) to formally notify them that a Tyco (Agastat) relay had failed. The following is a summary of the Part 21 report provided by Curtiss Wright: EN Revision Text: PART 21 INTERIM REPORT - FAILURE OF CURTISS WRIGHT SUPPLIED SAFETY RELATED RELAY
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |