CEI improves EHV transformer protection via relay blocking scheme
Journal Article
·
· Electr. Light Power (Boston); (United States)
OSTI ID:7212943
As the 345-kV system was expanded at Cleveland Electric Illuminating Co., the protection scheme used with transformers 200 MVA and larger was reevaluated. CEI has been using a Westinghouse Sudden Pressure Relay (SPR) since 1952 for protection on three-phase, gas-cushioned units rated 6.25 MVA and above, including large EHV transformers. This is the only type of fault pressure relay used at CEI. The SPR relay responds to the sudden increase in gas pressure in the gas cushion of a transformer caused by an internal transformer fault. The relay is sensitive enough to respond to turn-to-turn faults.
- OSTI ID:
- 7212943
- Journal Information:
- Electr. Light Power (Boston); (United States), Journal Name: Electr. Light Power (Boston); (United States) Vol. 55:5; ISSN ELLPA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
200301* -- Power Transmission & Distribution-- AC Systems
EHV & UHV-- (-1989)
200302 -- Power Transmission & Distribution-- DC Systems-- (1989-)
24 POWER TRANSMISSION AND DISTRIBUTION
AC SYSTEMS
CONTROL
CONTROL SYSTEMS
CURRENTS
ELECTRIC CURRENTS
ELECTRICAL EQUIPMENT
ENGINEERING
EQUIPMENT
EQUIPMENT PROTECTION DEVICES
HVAC SYSTEMS
OPERATION
POWER SYSTEMS
POWER TRANSMISSION
PRESSURE CONTROL
PUBLIC UTILITIES
SAFETY
TRANSFORMERS
EHV & UHV-- (-1989)
200302 -- Power Transmission & Distribution-- DC Systems-- (1989-)
24 POWER TRANSMISSION AND DISTRIBUTION
AC SYSTEMS
CONTROL
CONTROL SYSTEMS
CURRENTS
ELECTRIC CURRENTS
ELECTRICAL EQUIPMENT
ENGINEERING
EQUIPMENT
EQUIPMENT PROTECTION DEVICES
HVAC SYSTEMS
OPERATION
POWER SYSTEMS
POWER TRANSMISSION
PRESSURE CONTROL
PUBLIC UTILITIES
SAFETY
TRANSFORMERS