Fault current limiter for generator bus protection (27 kV, 600 A, 330 kA)
Purpose of this project was to develop a 27-kV fault current limiter to protect 600-A auxiliary transformers off a generator bus with prospective faults of 330 kA (rms sym). In this investigation, the current-limiting protector (CLP) principle was selected as the only feasible choice for a current limiter. Theoretical let-through currents of 60,000 A (peak), with energy values of 1.7 x 10/sup 6/ J and let-through i/sup 2/t values of 2.5 x 10/sup 6/ A/sup 2/s, were derived, for which double-barrel fuses are required. Various test techniques to overcome limitations of existing laboratory facilities were explored. The failure mode, effects, and criticality analysis (FMECA) showed that a uniformly highly reliable CLP system can be designed. Component tests of the CLP conductor of parallel fuses were performed. It was found that the conductor can withstand the high fuse-arc and recovery voltages of a 27-kV system. Separate fuse tests showed that the success of this project depends on the development of high-current fuses. The planned hybrid method (generator plus parallel capacitor discharge) will be capable of testing a CLP to the required ratings.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6684188
- Report Number(s):
- ORNL/Sub-82-17473/1; ON: DE87007830
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development and testing of a 38kV current limiting protector. Final report
Fault protection for high-current distribution. [Current-limiting protector (CLP)]