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Archive for January, 2007

Coordinated Power System Protection

by @ Monday, January 22nd, 2007. Filed under Electrical engineering, Uncategorized

File : pdf, 1.89 MB, 100 pages
CHAPTER 1. GENERAL REQUIREMENTS
Purpose
Scope
References
Electrical power systems
Design procedures
CHAPTER 2. ELECTRICAL POWER SYSTEM OVERCURRENTS
General
Normal current
Overload current
Short-circuit current
Ground-fault current
Sources of short-circuit current
Time variation of short-circuit current
Symmetrical and asymmetrical short-circuit current
CHAPTER 3. OVERCURRENT PROTECTIVE DEVICES
General
Motor overload relays
Fuses.
Motor short-circuit protectors (MSCP)
Circuit breakers
Protective relays
Automatic reclosing devices
CHAPTER 4. PROTECTIVE DEVICES COORDINATION
General
The coordination study
Primary and medium-voltage coordination
Low-voltage [...]

The art and science of protective relaying

by @ Thursday, January 11th, 2007. Filed under Electrical engineering, Uncategorized

File : 2.82MB, 357 pages
1. The philosophy of protective relaying
What is protective relaying?
The function of protective relaying
Fundamental principles of protective relaying
- primary relaying
- back-up relaying
- protection against other abnormal conditions
Functional characteristics of protective relaying
- sensitivity, selectivity, and speed
- reliability
How do protective relays operate?
2. Fundamental relay-operating principles and characteristics
General considerations
- operating principles
- definitions of operation
- operation [...]

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