Define Directional Relay at Kaitlyn Fitzhardinge blog

Define Directional Relay. Directional feature is realized by comparing the direction of flow of line current with reference to the bus voltage i.e. A directional relay is a type of protective relay that operates based on the direction of the power flow in an electrical circuit. Directional earth fault relay is used to protect the transformer/generator/alternator from over current fault. When the power system is not radial (source on one side of the line), an overcurrent relay may not be able to provide adequate protection. It compares the direction of the fault current to a predetermined reference direction and, if the fault current is in the opposite direction of the reference, the relay operates to trip the appropriate. Selective protection cannot be achieved with time graded overcurrent protection systems in ring or loop systems as well as in radial circuits with two end power supply. Directional protection is useful in all those cases when there is more than one. The relay sense the fault current in only one direction, the relay does not operate when the current in opposite direction. A directional relay is a protective device used in electrical power systems to detect faults and abnormalities by monitoring the direction of current. Hence it is dual input and a phase comparator type relay. Directional protection is a pr123/p and pr333/p advanced function. This type of relay operates in on direction of current flow and blocks in the opposite direction. Although directional relays have been applied successfully for many years, several new and unique applications and power system disturbances. Directional relay measures phase angle between voltage and current.

Directional protection is useful in all those cases when there is more than one. A directional relay is a protective device used in electrical power systems to detect faults and abnormalities by monitoring the direction of current. This type of relay operates in on direction of current flow and blocks in the opposite direction. The relay sense the fault current in only one direction, the relay does not operate when the current in opposite direction. When the power system is not radial (source on one side of the line), an overcurrent relay may not be able to provide adequate protection. Although directional relays have been applied successfully for many years, several new and unique applications and power system disturbances. Directional protection is a pr123/p and pr333/p advanced function. Directional feature is realized by comparing the direction of flow of line current with reference to the bus voltage i.e. Selective protection cannot be achieved with time graded overcurrent protection systems in ring or loop systems as well as in radial circuits with two end power supply. Hence it is dual input and a phase comparator type relay.

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Define Directional Relay Directional relay measures phase angle between voltage and current. A directional relay is a type of protective relay that operates based on the direction of the power flow in an electrical circuit. The relay sense the fault current in only one direction, the relay does not operate when the current in opposite direction. This type of relay operates in on direction of current flow and blocks in the opposite direction. Hence it is dual input and a phase comparator type relay. When the power system is not radial (source on one side of the line), an overcurrent relay may not be able to provide adequate protection. A directional relay is a protective device used in electrical power systems to detect faults and abnormalities by monitoring the direction of current. It compares the direction of the fault current to a predetermined reference direction and, if the fault current is in the opposite direction of the reference, the relay operates to trip the appropriate. Directional earth fault relay is used to protect the transformer/generator/alternator from over current fault. Selective protection cannot be achieved with time graded overcurrent protection systems in ring or loop systems as well as in radial circuits with two end power supply. Directional relay measures phase angle between voltage and current. Directional feature is realized by comparing the direction of flow of line current with reference to the bus voltage i.e. Although directional relays have been applied successfully for many years, several new and unique applications and power system disturbances. Directional protection is a pr123/p and pr333/p advanced function. Directional protection is useful in all those cases when there is more than one.