Load tap changers: Investigations of contacts, contact wear and contact coking

Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts

Volumn , Issue , 2002, Pages 259-272

  Schellhase, Hans Ulf ^a   Pollock, Robert G ^a   Rao, Avaral S ^a   Korolenko, Erik C ^a   Ward, Barry ^b  

^a POWERTECH LABS INC   (Canada)

^b ELECTRIC POWER RESEARCH INSTITUTE   (United States)

Author keywords

Contacts; Diverter switches; LTC Maintenance; Oil filled switchgear; Oil immersed contacts; OLTC; Reversing switches

Indexed keywords

COKING; ELECTRIC CONTACTS; ELECTRIC SWITCHGEAR; ELECTRIC TRANSFORMERS; QUALITY ASSURANCE; QUALITY CONTROL; WEAR OF MATERIALS;

OIL-FILLED SWITCHGEARS;

ELECTRIC LOADS;

EID: 0036450524     PISSN: 03614395     EISSN: None     Source Type: Conference Proceeding    
DOI: None     Document Type: Conference Paper

References (6)

1. Savio, L.J., Transformer Consultant; Ward, B., EPRI; Crutcher, Russ, Microlabs Northwest; Hanson, D., Haupert, T., TJH2b Analytical Services, "Analysis of Coke Formation on LTC Contacts using Optical Microscopy", Proceedings of the 2000 International Conference of Doble Clients - Sec 8-11, 2000.
2. Hanson, D., Haupert T., Savio, L. TJH2b Analytical Services Incorporated; Crutcher, R., Microlab Northwest; EPRI, Technical Report: Development of Load Tap Changer Monitoring Technique, Mechanism of Coking, 1001946, Technical Progress Report, December 2001.
3. th edition, Springer-Verlag, Berlin Heidelberg New York, 1981, p.80.
4. th edition, MCGraw-Hill, New York, 1973, Sec. 10, p. 11.
5. Schellhase, H.U., Powertech Labs Inc.; EPRI, Technical Report: Transformer Load Tap Changer Management, Diagnostics, Contact Coking, and On-Line Oil Filtration, 1006654, Technical Progress Report, December 2001.
6. Koidl, H.P., Rieder, W.F., Salzmann, Q.R., "Contact Compatibility of Organic Vapours and their Physical/Chemical Properties", Institute of Switching Devices and High Voltage Technology, Vienna University of Technology, Austria, Gußhausstr. 25, 1040 Vienna, Proc. 43rd Holm Conference on Electrical Contacts, 1997.