REG NASA-LLIS-0516-1994 Lessons Learned Working in the Proximity of Energized Electrical Sources.pdf

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1、Lessons Learned Entry: 0516Lesson Info:a71 Lesson Number: 0516a71 Lesson Date: 1994-08-02a71 Submitting Organization: LARCa71 Submitted by: Bernard LewisSubject: Working in the Proximity of Energized Electrical Sources Description of Driving Event: On 7-2-91 a LaRC electrical technician was seriousl

2、y injured while preparing to check a 22kV nitrogen filled power cable in an electrical substation. When the technician came in proximity to an energized switchgear electrical terminal, an arc initiated, jumped to the technicians hand, passed into his arm, and exited from various parts of his lower b

3、ody as well as from a key ring hanging from his belt.Langley Handbook (LHB) 1710.6, “Electrical Safety“, defines safe distances for approaching exposed energized circuits. The LaRC investigation determined that the injured technician was less than the LHB 1710.6 mandated 3 feet from the injury causi

4、ng energized electrical source.Lesson(s) Learned: Prescribed procedures should be followed and extreme caution exercised when working in the proximity of energized electrical sources.Recommendation(s): Several actions were taken due to this mishap. They included issuance of a safety alert, procedure

5、s reviews, and briefing high voltage technicians on the importance of maintaining safe distance from a high voltage source.Evidence of Recurrence Control Effectiveness: N/AProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Documents Related to Lesson: N

6、/AMission Directorate(s): N/AAdditional Key Phrase(s): a71 Energya71 Facilitiesa71 Industrial Operationsa71 Safety & Mission AssuranceAdditional Info: Approval Info: a71 Approval Date: 1997-04-02a71 Approval Name: Elijah C. Kenta71 Approval Organization: 421a71 Approval Phone Number: 757-864-3345Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-