Contents
Chapter 1
First principles Overview
1.2 Protection against abnormalities
1.3 Planning system protection
1.4 Preliminary design
1.5 Basic protective equipment
1.6 Special protection
1.7 Field follow-up
1.8References
Chapter 2
Short-circuit calculations
2.1 Introduction
2.2 Types of short-circuit currents
2.3 The nature of short-circuit currents
2.4 Protective device currents
2.5 Per-unit calculations
2.6 Short-circuit current calculation methods
2.7 Symmetrical components
2.8 Network interconnections
2.9 Calculation examples
2.10 Specialized faults for protection studies References
2.12 Bibliography
Chapter 3
Instrument transformers
3.1 Introduction
3.2 Current transformers (CTs)
3.3 Voltage (potential)transformers (VTs) References
3.5 Bibliography
Chapter 4
Selection and application of protective relays
4.1 General discussion of a protective system
4.2 Zones of protection
4.3 Fundamental operating principles
4.4 Functional description .application and principles
4.5 References
4.6 Bibliography
Chapter 5
Low-voltage fuses
5.1 General discussion
5.2 Definitions
5.3 Documentation
5.4 Standard dimensions
5.5 Typical interrupting ratings
5.6 Achieving selectivity with fuses
5.7 Current-limiting characteristics
5.8 Special applications for low-voltage fuses .
5.9 References
5.10 Bibliography
Chapter 6
High-voltage fuses (1000 V through 169 kV)
6.1 Definitions
6.2 Fuse classification
6.3 Current-limiting and expulsion power fuse designs
6.4 Application of high-voltage fuses
6.5 References.
6.6 Bibliography
Chapter 7
Low-voltage circuit breakers
7.1 General
7.2 Ratings
7.3 Current limitation
7.4 Typical ratings
7.5 Trip unit
7.6 Application
7.7 Accessories
7.8 Conclusions
7.9 References
7.10 Bibliography
Chapter 8
Ground-fault protection
8.1 General discussion
8.2 Types of systems relative to ground-fault protection
8.3 Nature,magnitudes,and damage of ground faults
8.4 Frequently used ground-fault protective schemes
8.5 Typical applications
8.6 Special applications
8.7 References
8.8 Bibliography
Chapter 9
Conductor protection
9.1 General discussion
9.2 Cable protection
9.3 Definitions
9.4 Short-circuit current protection of cables
9.5 Overload protection of cables
9.6 Physical protection of cables
9.7 Code requirements for cable protection rved.
9.8 Busway protection
9.9 References
9.10 Bibliography
Chapter 10
Motor protection
10.1 General discussion
10.2 Factors to consider in protection of motors
10.3 Types of protection
10.4 Low-voltage motor protection
10.5 Medium-voltage motor protection References
10.7 Bibliography
Chapter 11
Transformer protection
11.1 General discussion
11.2 Need for protection
11.3 Objectives in transformer protection
11.4 Types of transformers
11.5 Preservation systems
11.6 Protective devices for liquid preservation systems
11.7 Thermal detection of abnormalities
11.8 Transformer primary protective device
11.9 Protecting the transformer from electrical disturbances
11.10 Protection from the environment
11.11 Conclusion
11.12 References
11.13 Bibliography
Chapter 12
Generator protection
12.1 Introduction
12.2 Classification of generator applications
12.3 Short-circuit performance
12.4 Generator grounding
12.5 Protective devices
12.6 References
12.7 Bibliography
IEEE Std 242-1986, also known as the "IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems", is a guide for the design, protection and coordination of electrical power systems in industrial and commercial facilities. The purpose of this standard is to provide recommendations for safe and efficient operation of power systems by ensuring that protection and coordination are properly designed, installed and maintained.
The standard covers various aspects of electrical power systems including overcurrent protection, voltage protection, power system grounding and fault location. It provides guidelines for the selection and application of protection devices such as circuit breakers, fuses and relays to ensure that the power system is protected from damage caused by overcurrents, undervoltages, short circuits and ground faults.
Additionally, the standard provides recommendations for the coordination of protection devices to minimize the risk of widespread power outages and ensure that faults are cleared quickly and effectively. This includes guidelines for time-current characteristics of protective devices and their proper coordination to minimize the risk of widespread power outages.
In conclusion, the IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems is a widely recognized and widely used standard for the design and protection of electrical power systems in industrial and commercial facilities. It provides a comprehensive set of guidelines for ensuring safe and reliable power system operation.
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