Comparison of ANSI, IEC and CSA standards durability requirements on station-type metal oxide surge arresters for EHV power systems
- Inst. de Recherche d'Hydro-Quebec (IREQ), 1800 montee Ste-Julie, Varennes, Quebec J3X 1S1 (CA)
This paper presents an analysis of stresses applied to two actual types of station class surge arresters of the same voltage rating when tested for durability as prescribed by American (ANSI) International (IEC) and Canadian (CSA) standards for 315 kV and 734 kV power systems. The analysis which is made with an experimentally validated arrester model, reveals that the IEC duty cycle test is the most severe of all. In fact it can bring the varistors of an actual station-type arrester to a peak temperature of 129{degrees} C, which leaves a margin of only 46{degrees} C to its thermal stability limit at maximum continuous operating voltage (MCOV). Another actual arrester using lesser V-I-T varistor characteristics but larger varistor volume and better heat transfer from inside to outside the arrester, produces 103{degrees} C which corresponds to a slightly better temperature margin of 49{degrees} C. It is observed that even when using the lower performance V-I-T characteristics of the latter arrester, a thin-wall arrester housing design can improve heat transfer to a point where the margin improves to 101{degrees} C on a hypothetical arrester.
- OSTI ID:
- 7239022
- Journal Information:
- IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (United States), Vol. 7:3; ISSN 0885-8977
- Country of Publication:
- United States
- Language:
- English
Similar Records
Gapless surge arresters for power systems applications. Volume 3. 500-kV gapless arrester field tests. Final report
Development of metal-oxide varistors for gas-insulated surge arresters
Related Subjects
CIRCUIT BREAKERS
MATERIALS TESTING
STANDARDS
LIGHTNING ARRESTERS
OXIDES
DESIGN
EHV AC SYSTEMS
EHV DC SYSTEMS
INTERNATIONAL COOPERATION
OPTIMIZATION
PERFORMANCE TESTING
PLANNING
SURGES
AC SYSTEMS
CHALCOGENIDES
COOPERATION
DC SYSTEMS
ELECTRICAL EQUIPMENT
EQUIPMENT
EQUIPMENT PROTECTION DEVICES
OXYGEN COMPOUNDS
POWER SYSTEMS
TESTING
240100* - Power Systems- (1990-)
240400 - Power Transmission & Distribution- Health & Safety- (1990-)
240500 - Power Transmission & Distribution- Environmental Aspects- (1990-)