What is a protective device coordination study?
A protective device coordination study is a survey of a facility’s electrical systems. It analyzes the impacts of short circuits, equipment failure, and other core faults in a facility’s operation. It should always be conducted by qualified electrical engineers.
What is overcurrent protection coordination?
Coordination of overcurrent protective devices is necessary to limit interruptions to the smallest portion of the power system in the event of an overload or short-circuit.
What is the coordination in electrical system protection?
An electrical power system is designed so that if a short-circuit occurs, a protective device (such as a fuse or circuit breaker) will operate to “open the circuit” and prevent the continued flow of electrical energy to the faulted area.
What is meant by co ordination of protective devices?
What is protective coordination? It’s the selection, arrangement, installation, and maintenance of protective devices to limit the effects of an overcurrent (short-circuit) situation to the smallest area. Protective coordination requires modeling the entire electrical network.
What is the purpose of a coordination study?
The purpose of a coordination study is to determine the proper settings for overcurrent protective devices in the power system.
What is the aim of protective device?
Protection devices are installed with the aims of protection of assets and ensuring continued supply of energy. Switchgear is a combination of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment.
Where are overcurrent protection devices required?
In general, these overcurrent devices must be installed at the point where the conductor being protected receives its power; for example, at the beginning of a branch circuit, as illustrated in Figure 3.
How does an overcurrent device work?
An overcurrent protection device protects the circuit by opening the device when the current reaches a value that will cause an excessive or dangerous temperature rise in conductors. Most overcurrent protection devices respond to both, short-circuit or ground-fault current values as well as overload conditions.
What are coordination studies?
A coordination study analyzes the characteristic curves of the fuses and breakers and compares them against one another on log-log plots similar to that shown in the following figure. Any areas of miscoordination will be apparent by overlapping of curves from the various devices.
What is coordination study?
What is a coordination study?
What is the most commonly used protective device?
The surge protection device is the most frequently used and also well-organized kind of over-voltage protective devices.
