Coordinated Power System Protection


Coordinated Power System Protection






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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 coordination

Ground-fault coordination

Coordination requirements

Maintenance, testing, and calibration

Example of phase coordination

Example of ground-fault protection



CHAPTER 5. ELECTRICAL SYSTEM PROTECTION TECHNIQUES

Generator protection

Transformer protection

Conductor protection

Motor protection

Bus and switchgear protection

Ground-fault protection

Miscellaneous equipment protection .

App A. REFERENCES

App B. TYPICAL PROTECTIVE DEVICE SETTINGS

App C. TYPICAL TIME-CURRENT CHARACTERISTIC CURVES

App D. TYPICAL DEVICE AND EQUIPMENT RATINGS

App E. PARTIAL RELAY DEVICE NUMBERS LIST

App F. REPRESENTATIVE PROTECTIVE DEVICE OPERATING TIMES

App G. COORDINATION EXAMPLES

App H. COMPUTER SOFTWARE APPLICATIONS

BIBLIOGRAPHY

GLOSSARY

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